How to make better to use and maintain Torque Limiter

Torque Limiter for use and maintenance, the user should have the following aspects:
(1) When the crane is energized, the weight, width, height sensor signals will each transport through the shielded cable to the host computer, the instrument microprocessor within the input signal and the manual setting of the working parameters of various lifting automatically After calculation and determination process, the weight, width, height and other data through the LCD display, the control signal to the relay, continuous cycle.
(2) To take force sensing mechanism of the installation due to the different types of cranes installed power take institutions are not the same, the installation method is not the same.
(3) Instruments torque limiter debugging methods in use for some time, more or less there will be some deviation. Debugging method is relatively simple, as long as carefully read the manual, and in the factory under the guidance of one or two hands debugging, basically able to be aware of.

(4) Many manufacturers are not for the sake of confidentiality to provide users with circuit drawings, which undoubtedly brings some maintenance personnel difficult, so trainees should as much as possible to the factory service personnel understand some common troubleshooting and analysis Methods and seriously make a record, to prepare for contingencies
(5) To master the use of the torque limiter is a point on the front panel buttons. Some key functions are very simple, such as magnification buttons, just lifting rope magnification conversion; while some keys in a different platform and its function is completely different, such as increasing the key to reduce the key and the reset button and so on. The operating personnel, some commonly used function keys must be memorized in mind.

Torque Limiter

(6) For the construction of hydropower lifting equipment, demolition, removal and installation is very frequent. Demolition of the device, the crane operator or full-time electrician must properly handle the device display instrument, connecting cables, power take off device components and sensors. Mark the best before the demolition, light demolition light, proper protection, do not squeeze each other, so as to avoid collision damage. Installation according to the original location of the recovery order and then debug and calibration.
(7) Cranes generally have a good variety of operating conditions curve, for example, there is the main tower crane jib boom conditions and working conditions, but there are three conditions jib arm length, but also the three conditions, as long as the lifting Arm length, magnification, large hook weight and other parameters have a change, then we have to call the torque limiter with suitable curve. These changes need to be familiar personnel to operate, if a person is not fixed, it is unclear adjustment method, or random settings so that the torque limiter in failure mode of operation, the consequences could be disastrous.
   Therefore, the use and maintenance of the torque limiter is also the same as many other special equipment required to do will be people, fixed machines, statutory responsibilities, even when there are fewer people who have to maintain a relatively fixed.
(8) Since the torque limiter PTO parts due to long-term use can cause wear or by other natural environment, so that the display weight error is too large, so every once in a while the accuracy of the system should be regularly inspected, and if found deviations beyond GB range will re-adjust and calibrate on weight and related data archiving your records, which later rational use and maintenance is particularly important. Period is generally 3 to 6 months, in order to ensure the safe use of cranes crane.

    Hangzhou chinabase is the China Torque Limiter manufacturer, Specialist in: friction torque limiters, pilot ball torque limiters, pilot bronze torque limiters, torque limiters couplings, torque limiters adapters. We have the capability to custom design and manufacture specialized Torque Limiters, and their connections to your requirements.

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What is the Drive shaft ?

   Drive shaft (drive shaft) connection or Assembled parts, but can also be move or rotate, the circular portions of objects, general use of light, alloy is torsional Go to the Control. On the front-engine rear-wheel drive car was sent to the master transmission gear axis rotation, it can be via a universal Node Connection several parts of the. It is a high speed, low-supporting rotator, so its dynamic balance is crucial. Should generally be at the factory Propshaft Balancing testing and balancing machines carried out have been adjusted.

PTO Drive Shaft 

 Drive shaft role in
    Automobile transmission device axis of of the power transmission an important component part, its role is, in gear box, the engine power transmission to the wheels drive axle, from motorized the vehicle drive MECHANICS.

    Drive shaft Using
Dedicated Automotive Transmission mainly used for tanker, refueling trucks, sprinklers, suction sewage truck, suction truck, fire engines, high pressure cleaning cars, wrecker truck, high-altitude operation truck, garbage trucks and other models.

Hangzhou Chinabase Machinery is the PTO shaft products components supplier, Specialist in: Agricultural PTO Drive Shaft, Tractor PTO Drive Shaft, Cross Journal, Ratchet Torque Limiter, Overrunning Clutch, Friction Torque Limiter, Constant Velocity Joint.
We also can provide products according your requirements. Please feel free to contact us with any enquiries.Read more:http://www.power-transmissions.com/Cardan%20Shaft/Cardan-Shaft.htm

Speed Reducer use classification

1.In accordance with the intended use,Speed Reducer can be divided into general and special reducer reducer two categories. Both of  the design, manufacture and use characteristics of each are not identical. 1970s and 1980s, the world reducer technology has been greatly developed, and with the development of new technological revolution closely. Its main types: Gear reducer; Worm reducer; Gear - worm reducer; Planetary gear reducer.
2, The general reducer with helical gear reducer (including parallel shaft helical gear reducer, worm gear, bevel gear reducer, etc.), planetary gear reducer, cycloid reducer, worm gear reducer, planetary CVT mechanical friction and so on.

Aluminum Worm Gear Reducers

Single-stage, two, two more than two. Layout of the form: Expand, shunt type, coaxial.
2) Bevel gear reducer
For the input shaft and the output shaft position to intersect the occasion.
3) Worm reducer
Mainly for the transmission ratio i> 10 of the case, the transmission is large and compact. The disadvantage is low efficiency. Widely Archimedes worm gear.
4) Gear - worm gear
If the gear at high level, the structure is compact;
If the worm gear at high level, the efficiency is higher.
5) Planetary gear reducer
High transmission efficiency, wide range of gear ratios, transmission power 12W ~ 50000KW, small size and weight.
Hangzhou chinabase is the Speed Reducer components supplier, any need visit their site:http://www.speedreducer.org/

What is Pulley？

Hangzhou chinabase is the China Pulley manufacturer,we Specialise in: European Series V-Belt Pulleys, American Standard Sheaves, Timing Belt Pulleys. China Taper pulleys, adjustable pulleys, falt belts pulleys, sheaves, V-Belt Pullys for taper bushes,V-Belt Pullys with solid hub.

Pulley Introduction
There is a peripheral groove pulley can be rotated around the axis of the small wheel. Rotatable about the central axis of the slotted disc and the disc across the flexible cable (rope, tape, rope, chains, etc.) may be composed of a simple rotation about a central axis of the pulley mechanism is called.
Number
Single pulley, double pulley, three wheels, four wheels, pulleys as well as a variety of multi-
Action
Guide pulley, balance pulley
Connection
Hook type, chain ring, round timber type, hanging by rings and chain

Pulley Hangzhou Chinabase 

Structure
Pulley block is determined by a number of pulleys and pulley match is made, you can reach both the effort and the purpose of changing the direction of force. Use, and how much effort the rope around the law, depending on the use of pulley effect. Assumed to be two rope pulleys that every object and the movable pulley rope bear
Power is the object and the movable pulley of the total weight of the fraction.
Number, the principle is: n is an odd number, the starting rope driven pulley. When using a pulley rope commitment has three sections, each subsequent increase a rope pulley to increase Sec. Such as: n = 5, you need two movable pulley (32). n is an even number, the starting rope from the fixed pulley, the movable pulley only when all bear with two rope. Such as: n = 4, you need two movable pulley (22).
Secondly, as required to determine the number of fixed pulley, the principle is: General: two shares with a rope pulley, a movable pulley with a fixed pulley general. Is not required to change the direction of force when the rope sections can be reduced even a fixed pulley; force to change the direction of action, the need to add a fixed pulley.

Pulley Material
Not bear the load of the small size of the pulley (D <350mm) entity pulley generally made using 15, Q235 or cast iron (such as HT200).
By a large load sheave generally use ductile iron or cast steel (eg ZG270-500), and the hole or cast ribbed structure with spokes
Large Pulley (D> 800mm) for general use steel and steel plate welded structure.
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Do you now How to Remove a Pulley from a Motor Shaft?

Pulleys are one of many devices used to connect motors to other equipment. These devices are designed to support and control drive belts of various types. Over time these pulleys can become worn, deformed and damaged. This creates heat and wear on the drive belts, which will lead to premature failure of the belts. To solve this problem, the pulley must be replaced. Replacing a motor shaft pulley can be a challenge, but it's a doable job with the right tools.

Pulley Chinabase Machinery

Instructions
1.Shut off the power to the motor at the main breaker. This will prevent the motor from starting while you are working on it. Use the Allen wrench to loosen the bolt holding the pulley in place.

2.Unscrew the center bolt of the pulley puller until the puller bolt stops. Touch the pit of the puller bolt to the center of the motor shaft. Clamp the puller claws over the edges of the pulley.

3Begin tightening the center puller bolt. The puller bolt will be pushing on the motor shaft and pulling on the pulley at the same time. Continue tightening the bolt until the pulley is completely pulled off the motor shaft.

Hangzhou chinabase is the Industrial pulley manufacturer, any need visit their site: http://www.power-transmissions.com/pulley/pulleys.html

Structural features speed reducer

    Speed Reducer mainly by the transmission parts (gears or worm), shafts, bearings, housing and accessories formed. Its basic structure has three parts:
1, gear, shaft and bearing assembly
     The pinion is formed integrally with the shaft, said gear shaft, this structure is used for the shaft diameter of the gear is not the case related to the diameter, if the shaft diameter is d, the diameter of the gear tooth root circle is df, when df- d ≤ 6 ~ 7mn should adopt this structure. When df-d> 6 ~ 7mn, the use of the gear and shaft is separated into two parts of the structure, such as the low-speed shaft with the large gear. At this point the circumferential gear fixed to the shaft parallel key connection, shaft parts using the shaft shoulder, sleeve, and bearing cap axially fixed. Two axes are deep groove ball bearings. This combination is not used to bear radial load and Reducer
Large axial load situation. When the axial load is large, you should use angular contact ball bearings, tapered roller bearings or deep groove ball bearing and thrust bearing assembly structure. Bearing is the use of gear rotates splashes of thin oil lubrication. Lubricating base oil pool box, the gear being rotated splashes splashing into the inner wall of the cover, flows along the inner wall of the box side bevel, through the guide groove of a bearing. When the oil-soaked gear circumferential velocity υ ≤ 2m / s should be used grease lubricated bearings, in order to avoid possible splashes of thin oil wash away grease, can be used to separate the slinger. To prevent dust from entering the oil drain and outside the box, on the bearing cap and shaft extension is installed between the sealing element.
2, Box
Reducer housing is a key component. It is the base transmission parts, should have sufficient strength and rigidity.
Usually with a gray cast iron housing, for heavy or shock loads reducer steel box can also be used. Reducer monomer production, in order to simplify the process, reduce costs, can be welded steel box.
Grey cast iron has good performance and damping properties. In order to facilitate installation and removal of shaft parts, box made of split along the horizontal axis line. Box with the lid and the lower bolt into one. Bearing bolts should be as close to the bearing hole, while bearing boss next, should have sufficient supporting surface in order to place the bolts and tighten the bolts needed to ensure the wrench space. In order to ensure sufficient rigidity housing, near the holes in the bearing support ribs added. To ensure that the gear unit disposed on the foundation box stability and to minimize the area of ​​the base plane of the machining, the base housing is generally not used a completely flat.
3, Reducer attachments
In order to ensure the normal operation of the gear unit, in addition to gears, shafts, bearings and cabinet combination of structural design given enough attention, we must also take into account the reduction gear lubricating oil sump oiling, oil discharge, check the oil level, processing and removable lid and the box seat when maintenance precise positioning, lifting and other auxiliary parts and components reasonable choice and design.
  Reducer
1) Check the hole to check the gear meshing parts, and to inject lubricant inside, you should set the appropriate position in the box inspection hole. Inspection hole provided in the top of the lid can be directly observed at the gear engaging portion. Normally, the inspection hole cover plate with screws on the cover.
2) breather reducer work, cabinets temperature, gas expands, the pressure increases, in order to free air thermal expansion tank is discharged, in order to maintain pressure balance inside and outside the box, does not result in oil along the surface or shaft binning Seal cracks and other leaks, usually installed in the box at the top of the breather.
3) bearing cap is a fixed component of the axial position of the shaft and axial load, the bearing hole closed at both ends of the bearing cap. Bearing cap with flange and embedded two kinds. Using the hex bolt in the box, shaft extension at the bearing cap is through-hole, which is equipped with sealing devices. The advantage of flanged bearing cover is removable, easy to adjust the bearing, the bearing cap and embedded compared to a larger number of parts, large size, appearance is not smooth.
4) To ensure that each pin removable lid, still keeping the bearing hole machining precision manufacturing should be finished before the bearing hole in the lid and the box seat fitted on the coupling flange locating pin. Placed in the box on the longitudinal sides of the flange connection, symmetrically arranged symmetrically cabinet should avoid the wrong equipment.
5) Check the gearbox oil level indicator within the height of the oil sump, and keep an appropriate amount of the oil sump, generally easy to observe in the box, the more stable parts of the oil, the oil surface indicator installation.
6) when the oil drain plug, oil pollution emissions and cleaning agents should be in the box seat at the bottom of the oil tank at the lowest position open drain hole, usually with plug to block the drain hole, drain plug and Cabinet should be added between the leakproof joints with gaskets.
7) Kai box screws to strengthen the sealing effect, usually in the assembly in the housing subdivision surface coated with sodium silicate or sealant, which often result in the demolition difficult lid tightly cemented. To do this often in the cover flange coupling the appropriate location, processed ~ 2 screw, screwed into the open end of the cylindrical tank with a flat end or start box screws. Turn the start box could be on the cover screws from the top. Reducer or not to set a small box screws Kai Kai cover lid with a screwdriver pry Kai box screw size can be the same as the flange bolts.
 Hangzhou chinabase is theSpeed Reducer components supplier, any need visit their site:http://www.speedreducer.org/

Select pulley sliding door is the key

In fact, such a fitting way sliding doors 10 years ago has now entered the Chinese family, and subjected to a wide range of expectations, but at that time because there is no professional manufacturer of sliding doors, manufactured entirely by craft decoration companies, coupled with the pulley and slide the quality is not reliable rail, door deformation, sliding poor, severe noise when there is doubt on the show, which greatly damaged the enthusiasm of everyone using sliding doors.

Pulley Chinabase Machinery

Tip a large selection of the loading capacity of the end of round
Sliding door is not long-term use, the key is the quality of the pulley. Because sliding doors usually do 2.4 meters above the height of the door wider, coupled with the prevalence glass door now, so their great weight, if not the end of round loading capacity, will greatly affect the use of life prematurely push poor showing noise increase or foundation can not use. End of the current round of loading capacity on the market is the biggest Fu Lu sliding doors, its single wheel load can reach 180 kilograms, by the German testing organization concerned.

Tip two note sliding metal items
In order to prevent deformation of the door, sliding door frame data, mostly metals. {HotTag} metallic materials directly affects the quality of the sliding door. Current information on the market mainly for sliding metal steel and aluminum, the most expensive price of aluminum alloy, for example, Germany Fu Lu sliding doors. The reason to know that the information frame composition, because the hard metal items, such as aluminum alloy hardness is high, supporting strong, making the door will not be deformed. The steel and aluminum generally thinner would be inappropriate because the materials manufacturing giant doors. Some brands on the market today claiming to be aluminum alloy, in order to prevent deception in the acquisition should ask businesses to produce commodity inspection departments of the test statements.

Tip three carefully understand sliding action
The sliding door is a high-quality technical content, but just from the appearance point of view as a consumer is not easy to identify, which we need to pay more attention at the time of purchase to the merchant know, that is, from a second to feel. Good sliding door during sliding neither too heavy nor too ethereal, but with a certain weight of the door, sliding without oscillation, smooth and textured.
Hangzhou chinabase is the Pulley components supplier, any need visit their site: http://www.power-transmissions.com/pulley/pulleys.html

Precautions for using transmission chain

 Most of the Transmission chain is exposed in use, easy to accumulate dust, sand and grease, require frequent cleaning. Cleaning may remove the chain, the chain can be removed thoroughly. Wash thoroughly after removing the chain is on the cleaning agent (gasoline or kerosene) soak some time, scrub with a brush, section by section. Chain after cleaning is immersed in the lubricating oil 70 ~ 80 ℃, it filled before installation.

use of the chain, if the friction surface brown or dark brown, generally is inadequate supply, should be filled with oil. Chain lubrication quality, will directly affect the life of the chain. lubricated chain is best to use special chain oil or No. 30, No. 40 machine oil, gear oil SAE90 can also be used instead. You must use some of the oil viscosity, if the viscosity is too small, when the vehicle is in motion oil will splash into various parts of the body, affecting the car's appearance, engage in dirty his trousers, and the lubricating effect is not good. 

Transmission chain Chinabase Machinery

Replace with new chain should pay attention to the chain packing factory, there are two forms: one is the wax seal, and the other one is pre-lubricated. The so-called pre-lubricated chain is impregnated lubricant at the factory. These two processes is mainly to rust, easy storage. The latter can be installed directly after opening the package to use, the former should go to wax and clean diesel and re-oiled.

Note lubricants, oil injection in the chain not only to the surface, but should allow oil to pivot the inner and outer chain gap between the plates go, so as to achieve the purpose of lubrication. After oiling, oil droplets with a dry cloth to wipe off the excess. Cleaning and oiling the chain, you must first turn off the engine, or a finger caught in the chain of danger, causing unnecessary harm.

Again, install the chain, its loose side should have a suitable initial sag. Initial sag sprocket center distance of approximately 1% to 2%. And to the front and rear axle and the rear axle suspension in a straight line, the time just in the theoretical maximum value chain. Adjust the chain when the chain axis line to meet the normal tensioning position. If the chain too tight, it will lead to poor transmission, increase power consumption, acceleration chain and sprocket wear and tear, but also easy to make the chain snapped, and even accidents. The chain is too loose, driving will be issued when abnormal noise, vibrations increase, and there is danger of the chain off.
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Auto Parts comprehensive interpretation - Starter

Starter (starter) called motor which generates power by a DC motor, the starter gear transmits power to the flywheel ring gear, flywheel, crankshaft and start the engine.
As we all know, the engine starting needs external support, auto starter is to play this role. Broadly speaking, the starter with three components to realize the entire starting process. DC motors and introducing a current from the battery to the starter drive gear generates mechanical motion; transmission mechanism of the drive gear into the flywheel ring, and after starting the engine can be automatically disengaged; starter circuit by a solenoid on-off switch to control. Wherein the motor is a starter main internal components.

Motor Hangzhou Chinabase

    Engine to operate under its own power before, you need outside help to rotate. Engine outside help transition from rest to operate on their own in the process, known as the engine starts. Common way of starting the engine with manpower start, auxiliary gasoline engine starter and electric starter three forms. Human start using rope or hand way, simple but inconvenient, but labor-intensive, only applies to some of the small power of the engine, the car in some way as a backup only retains; auxiliary gasoline engine starter is mainly used in high-power diesel engines; electric start mode is simple, rapid start, with repeated starting capability, and can be remote controlled, so it is widely used in modern cars.

    Starter maintenance:
    The process of starting the engine starter, the battery from the battery into 300 ~ 400Ah, so in order to prevent an overcurrent or damaged battery phenomenon, starting time not more than 5s; winter prone to the phenomenon is difficult to start, start times each start time not too long, also starts each time should be left at appropriate intervals.

    Starter Troubleshooting:
    1, the battery power is low or no power, so there can not rotate or turn slow starter failure.
    2, starter thread loose or fall off, switch or adsorption switch failure.
    3, brush face brush wear or incorrect, spring weakness, so that the rectifier is bad.
    4, the excitation coil or armature coil short circuit and open circuit.
    5, rectifiers defaced, mica bulge, resulting in poor contact brush and rectifiers.

 Hangzhou chinabase is the Motor Base components supplier, any need visit their site: http://www.power-transmissions.com/motorbase/MOTORBASE.htm

Automotive Transmission Troubleshooting knew note that the red liquid

Transmission is an important part of a car, it is also very expensive replaced once. If you look closely, there are many signals indicate transmission problems and need attention. If you notice problems early will find in the repair and replacement of the transmission gearbox there will be a lot different.

Any leakage of liquid will be the sign of a problem, the more severe leakage, the more you should check the machine, pay attention to the red color of the liquid.

If the transmission does not leak but declining, that is over-heating and combustion of liquid sign.

Where or when moving the gear slippage, which means that the car will not be like before, move quickly and effectively. Although the machine speed, but it will move very slowly and short acceleration is missing.

The accelerator will lead to an expired car inspection slow movement between the gears moving.



 Hangzhou chinabase is the gearbox and speed reducer components supplier, any need visit their site: http://www.power-transmissions.com/reducer/Reducer_catalog.htm

The importance of mechanical steering machine maintenance

Compared to the electronic and hydraulic steering machine, mechanical steering machine structure more simple, more convenient maintenance, but due to the direct effect of the lever by the steering wheel, excessive wheel operation and severe vibrations will bring to the transverse rod wear. So everyday, the owners pay more attention to the following several aspects

1Walking in rocky or gravel potholed road, the steering machine is a big challenge, not only to withstand the steering lines need to change at any time tasks, but also bear the vibrations from the wheel conduction, these factors will give steering internal structure especially with the steering column gear parts convergence brings damage. So walking in the harsh road conditions, be sure to slow down and reduce loads on two-way steering.

Cardan Shaft Chinabase Machinery

2.Always check the direction of the machine cardan shaft ends and connecting parts of the protective sheath is damaged, water and sediment is premature wear and damage to the machine direction of the main reasons, if the protective cover damaged sand adhesions in the upper rack and pinion steering , attached to the surface of the film will be damaged, leading to internal corrosion wear. Should always check the protective cover, and found damage clean up and replace with new steering protective cover.

3.In doing wheel alignment adjusting toe, for steering rod after the protective cover to pay special attention to not appear distorted, assembly is not in place and so on, otherwise it will cause damage to the sheath.

4.Due to the use of grease will gradually become dirty, deterioration, reduced ability to make lubrication; while wearing the substance will be gradually increased, abrasive wear phenomenon will become increasingly important, so that the direction of machine wear and tear. Traveling 100,000 kilometers per deal about the direction of machine to do a comprehensive maintenance, thorough cleaning and re-greasing.

5.Of steering the use of harsh conditions, withstand large loads, you must use special grease, grease reach common use requirements.

Read more:The importance of mechanical steering machine maintenance http://www.power-transmissions.com/news.html

Teach you to judge whether bad universal joint

A worn universal joint is the most common drive shaft problem. This problem usually makes itself known with abnormal noises. Symptoms may include squeaking, grinding, clicking or clunking sounds when the car is in gear. Before the problem becomes severe, these symptoms may appear at first only when the car is in reverse.

Universal joint problems
Many times, the grease inside a universal joint will dry out. This leads to small indentations being worn by the roller bearings into the part of the joint known as the cross. As the bearings are forced to roll across the indentations, a loud grinding or chirping may be heard. When these problems become evident, it is time to replace the universal joint.

Noise
Unfortunately there is no way to tell if a u-joint is going bad just by looking at it. And tearing apart your driveshaft to physically inspect the u-joint is not a task most car owners care to do without reason. Therefore, most drivers rely on noise to let them know it's time to replace the joint. One way that may be telling is to turn your front tires all the way to one side or the other and drive around very slowly in a circle. Many times, if your u-joint is going bad, a distinct "clicking" sound can be detected by educated ears.

Universal joint  Chinabase Machinery

Vibration
Another way to detect when a u-joint needs to be replaced is by highway vibration. The vibration could become worse when accelerating and lessen when you back off the throttle. Of course, vibration can come from many other sources such as bad wheel bearings or loose lug nuts. Therefore, any vibration must be investigated by a qualified mechanic.

Put You Car on a Rack
If you have noticed any of the signs that your u-joint may be going bad, putting it on a mechanic's rack will tell the tale. With the car in gear and the emergency brake engaged, firmly grasp the drive shaft and try to rotate it. There should be no play in the u-joint. Even as little as 1/32 of an inch indicates immediate replacement. A good mechanic will be familiar with checking the drive shaft in this manner and can offer expert advice.

Facts
Most drive shafts employ two U-joints. The joints permit the vehicle to have changes in the alignment between the transmission and the differential. Essentially, the universal joint works by connecting two yokes at 90-degree angles to a cross. The yokes are free to pivot, and so the joint can spin while the drive shaft changes its angle.

Safety
When you have verified your u-joint is going bad, don't wait to replace it. Having one explode into pieces at highway speeds presents a dangerous, if not deadly, situation. Sharp metal parts will bounce down the asphalt at speeds rapid enough to injure those on the road following you, and you very well could loose control of your car when your heavy steel driveshaft hits the ground.
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Describes the working principle of bicycle transport

The Necessity of a Transmission
Most bikes use a chain drive. Derailleurs move the chain between different front and rear gears to change the gear ratio of the bike. The chain is exposed to dirt and water, which can damage it and hurt efficiency. The gears can get bent, the chain can jump off and oil from the gears can get on your pants. A hub transmission, by contrast, has no exposed parts. It requires little maintenance, doesn't damage pants and isn't affect by the weather.

To produce a bicycle that wouldn't wear you out or look ridiculous, transmissions were introduced.

How Bicycle Transmissions chain Work
To change the distance capabilities of a bicycle with a single turn of the pedal, multiple-geared transmissions were introduced. In the early days, 3-speeds and 10-speeds were common, but now there are advanced mountain bikes with up to 24-gears. Using chains and chain wheels that are smaller than the tires, many more revolutions can be attained with much less exertion from the cyclist. For example, the chain wheels might have 20 teeth, compared to the tires which are 25-inches in diameter. The rear gear might have 28 teeth. This creates a ratio that allows the tires to turn much more often than would be possible with a single turn of the pedal.

Chinabase Machinery  Transmissions chain

Inside the Transmissions chain
The chain wheels, as discussed above, are the primary working force in a bike's transmission. You'll find these wheels at the rear tire, and in the front. The rear chain wheel is called the freewheel, and it will usually contains between five and nine of the available gears included on the bike. These freewheels will spin in only one direction. That way, when the cyclist stops pedaling, the bike will coast, rather than coming to a sudden halt. Then there are the derailleurs. These gears apply tension to the chain, and have a couple of cogs that spin freely. When the cyclist switches gears (usually with a thumb switch near the handlebars), the arm of the derailleur changes to either allow slack in the chain or add tension as needed.

visit our More Products：Chinabase Machinery  http://www.power-transmissions.com/

Worm Gear Definitions and Uses

A worm gear is commonly used when large gear ratios are required. Worm gears can be used for reductions as high as 300:1 or more. Worm gears are usually in line with one shaft and drive a perpendicular shaft. Worm gears are common in equipment such as milling machines, where small increment movements are needed, as little as .001 of an inch.

How a Worm Gear is Designed
A worm gear looks very much like a screw. The gear is usually designed so that a single tooth runs in a spiral along the length of the gear. The angle of this tooth is what creates the large ratios. The worm gear is usually meshed with an ordinary-looking gear.

Special Characteristics
Besides the ability to create large ratios, a result of the steep angle of the worm drive which results in a low efficiency of the gear, a worm gear set has another unique feature. While the worm gear can always drive the opposing gear, however, dependent on the angle of the worm gear, the gear may or may not drive the worm. This is very useful for certain machines like conveyors where the feature can act as a brake.

Chinabase Worm Gear

Uses for Worm Gears
Machine Heads
Worm gears are also frequently used in the tuning mechanisms (called machine heads) of popular musical instruments such as guitars, basses and mandolins. Force reduction is one reason for using worm drives with machine heads, and another is that worms tend to lock worm gears wherever they are, an important attribute for a tuned string. It should be noted that the worms on machine heads have a special cut that allows them to be moved in either direction---to tune the string up or down. Simply cut worms can be turned in only one direction.

Conveyers and Gates
Simple worm drives can be turned in only one direction, which can be a blessing. Motors that operate conveyor belts should lock up when the motor is off so that the conveyor belt never runs backward. Sometimes the automatic gates that use worm drives to open and close will have two worm dives---one to open the gate and one to close it---so that it locks in either direction and cannot be forced. Worms always lock worm gears, but sometimes, depending on how the worms are cut, they can also assure that the worm gear moves in only one direction.

visit our More Products：http://www.speedreducer.org/

Can you Clean a Ball Screw Set ?

Chinabase Machinery Ball Screw Set is now available. We can also provide you with  Ball Screw Set that you may need.
In addition, we also offer OEM products – simply send us a drawing or sample and we'll provide you with a free quotation.

Ball screws often have some sort of shielding or casing, but even the best protected screw sometimes gets contaminated with debris or dust. Fortunately, cleaning ball screw bearings is typically a simple process.

Clean a Ball Screw Bearing Instructions
1Remove the ball screw assembly from the machine. The method of removal will depend on the type of machine being used.

2 Hold the ball screw under running water, repeatedly rotating the nut mechanism along the length of the screw.

3Place the ball screw in a small container filled with an aqueous or organic cleaning agent. Mannesmann Rexroth Engineering warns against using trichloroethylene when cleaning ball screws. Repeatedly rotate the nut mechanism along the length of the screw while it is submerged.

Ball Screw Set 

4Remove the ball screw from the cleaning agent and dry it with a rag.

5Rotate the nut along the length of the screw. Listen for debris in the bearings.

6Remove the nut from the screw if the ball bearings are still suspected of being contaminated.

7Remove the bearings from the nut with a pair of tweezers. Be careful not to damage, drop or lose the bearings during removal.

8Clean the individual bearings and all other screw components with industrial degreaser. Dry the components completely with a rag.

9Replace the bearings in the nut mechanism, and reassemble the ball screw.

10Lubricate the ball screw with an oil or grease-based lubricant, depending on the manufacturer's recommendation. Rotate the nut along the length of the screw as you do so.