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Product Description

  1. Special heat-treat alloy steel axle beam, it has the virtues of good synthetic performance, strong load ability and lower self weight.
  2. Wholly heat treatment for high quality alloy forged solid spindle, providing superior fatigue capability.
  3. High performance asbestos free brake linings extend service life.
  4. Camshaft matching with special seals, can ensure no entry of the grease into the brake drum thus axle will be more safety.
  5. Mobil grease lengthens maintenance-free time.
  6. Bearing is the domestic top brand, with the advantages of over loading capability, high rotating speed,good intensity, abrade resistant and heat resistant.
  7. Wheel nut is made of alloy steel with high strength, good tensile and bending resistance,not easy to break.
  8. Key components of axle are processed by digital equipment, complied with the international standard. Special requirements can also be meet as per client’s request

Axle – American Type Inboard Series

Model

Capacity Brake Track Distance of Spring Distance of Brake Chamber Axle tube Wheel Fixing Bearing Total Length Weight Recommend wheel
T mm mm mm mm mm Stud P.C.D. C.B.D.   mm kg  
UTA13RA03B2 13 420×180 1840 ≥930 390 127
x19
10-M22x1.5
ISO
335 281 518445/10 2185 372 7.5-20
UTA13RA03B3 13 420×200 1840 ≥930 370 127
x19
10-M22x1.5
ISO
335 281 518445/10 2185 385 7.5-20
UTA13RA02B2 13 420×180 1840 ≥930 390 127
x19
10-M22x1.5
ISO
285.75 221 518445/10 2185 372 7.5-20
UTA13RA07B2 13 420×180 1840 ≥930 390 127
x19
8-M20x1.5
JAP
285 221 518445/10 2185 372 7.5-20
UTA13SB03B2 13 420×180 1840 ≥930 390 150 10-M22x1.5
ISO
335 281 518445/10 2185 372 7.5-20
UTA13SB03B3 13 420×200 1840 ≥930 370 150 10-M22x1.5
ISO
335 281 518445/10 2185 385 7.5-20
UTA13SB02B2 13 420×180 1840 ≥930 390 150 10-M22x1.5
ISO
285.75 221 518445/10 2185 372 7.5-20
UTA13SB07B2 13 420×180 1840 ≥930 390 150 8-M20x1.5
JAP
285 221 518445/10 2185 372 7.5-20
UTA16RA03B4 16 420×220 1850 ≥940 360 127
x25
10-M22x1.5
ISO
335 281 518445/220149 2205 430 20″
UTA16SB03B4 16 420×220 1850 ≥940 360 150 10-M22x1.5
ISO
335 281 518445/220149 2205 430 20″

Axle – American Type Outboard Series

Model

Capacity Brake Track Distance of Spring Distance of Brake Chamber Axle tube Wheel Fixing Bearing Total Length Weight Recommend wheel
T mm mm mm mm mm Stud P.C.D. C.B.D.   mm kg  
UTA13RA12B2 13 420×180 1840 ≥930 390 127
x19
10-M22x1.5
ISO
335 281 518445/518445 2185 378 7.5-20
UTA13RA12B3 13 420×200 1840 ≥930 370 127
x19
10-M22x1.5
ISO
335 281 518445/518445 2185 390 7.5-20
UTA13RA11B2 13 420×180 1840 ≥930 390 127
x19
10-M22x1.5
ISO
285.75 221 518445/518445 2185 378 7.5-20
UTA13RA11B3 13 420×200 1840 ≥930 370 127
x19
10-M22x1.5
ISO
285.75 221 518445/518445 2185 390 7.5-20
UTA13SB12B2 13 420×180 1840 ≥930 390 150 10-M22x1.5
ISO
335 281 518445/518445 2185 378 7.5-20
UTA13SB12B3 13 420×200 1840 ≥930 370 150 10-M22x1.5
ISO
335 281 518445/518445 2185 390 7.5-20
UTA13SB11B2 13 420×180 1840 ≥930 390 150 10-M22x1.5
ISO
285.75 221 518445/518445 2185 378 7.5-20
UTA13SB11B3 13 420×220 1840 ≥930 350 150 10-M22x1.5
ISO
285.75 221 518445/518445 2185 378 7.5-20
UTA13SB14B2 13 420×180 1840 ≥930 390 150 8-M20x1.5
JAP
285 221 518445/518445 2185 378 7.5-20
UTA16SB12B4 16 420×220 1850 ≥940 360   150 10-M22x1.5
ISO
335 281 518445/220149 2205 440 8.00-20

Axle – American Type 127 Square and 146 Round Series

Model

Capacity Brake Track Distance of Spring Distance of Brake Chamber Axle tube Wheel Fixing Bearing Total Length Weight Recommend wheel
T mm mm mm mm mm Stud P.C.D. C.B.D.   mm kg  
UTA13SA12B3 13 420×200 1816 ≥916 356  127 10-M22x1.5
ISO
335 281 518445/518445 2176 360 7.5-20
UTA13SA11B3 13 420×200 1816 ≥916 356  127 10-M22x1.5
ISO
285.75  221 518445/518445 2176 360 7.5-20
UTA13SA14B3 13 420×200 1816 ≥916 356  127 8-M20x1.5
JAP
285 221 518445/518445 2176 360 7.5-20
UTA13SA17B3 13 420×200 1816 ≥916 356  127 10×7/8″-11
BSF
335 281 518445/518445 2176 360 7.5-20
UTA16SA12B4 16 420×220 1850 ≥940 350  127 10-M22x1.5
ISO
335 281 518445/220149 2200 400 8.0-20
UTA13RB11B2 13 420×180 2121 680  146x
19
10-M22x1.5
ISO
285.75 221 518445/220149 2461 380 7.5-20

Axle – Germany Series
 

Model

Capacity Brake Track Distance of Spring Distance of Brake Chamber Axle tube Wheel Fixing Bearing Total Length Weight Recommend wheel
T mm mm mm mm mm Stud P.C.D. C.B.D.   mm kg  
UTG12SB03B2 12 420×180 1840 ≥940 440 150 10-M22x1.5
ISO
335 281 33213/
33118
2172 370 8.00-20
UTG12SB03B3 12 420×200 1840 ≥940 375 150 10-M22x1.5
ISO
335 281 33213/
33118
2172 397 8.00-20
UTG12SB19B2 12 420×180 1870 ≥980 395 150 6-M20x1.5 33213/
33118
2155 430 8.0-20
UTG12SB19B3 12 420×200 1870 ≥980 395 150 6-M20x1.5 33213/
33118
2155 450 8.5-20
UTG14SB03B2 14 420×180 1840 ≥950 380 150 10-M22x1.5
ISO
335 281 33215/
32219
2222 400 8.00-20
UTG14SB03B3 14 420×200 1840 ≥950 360 150 10-M22x1.5
ISO
335 281 33215/
32219
2222 417 8.00-20
UTG14SB19B3 14 420×200 1870 ≥900 250 150 6-M20x1.5 33215/
32219
2192 462 8.5-20
UTG16SB03B2 16 420×180 1850 ≥950 390 150 10-M22x1.5
ISO
335 281 32314/
32222
2293 450 8.5-20
UTG16SB03B3 16 420×200 1850 ≥950 390 150 10-M22x1.5
ISO
335 281 32314/
32222
2293 459 8.5-20
UTG16SB03B4 16 420×220 1850 ≥950 390 150 10-M22x1.5
ISO
335 281 32314/
32222
2293 465 8.5-20
UTG16SB19B3 16 420×200 1870 ≥900 253 150 6-M20x1.5 32314/
32222
2260 566 8.5-24

Model

Capacity Brake Track Distance of Spring Distance of Brake Chamber Axle tube Wheel Fixing Bearing Total Length Weight Recommend wheel
T mm mm mm mm mm Stud P.C.D. C.B.D.   mm kg  
UTL11RA01B1 11 311×190 1820 ≥920 270 127
x16
10-M22x1.5 ISO 225 176 518445/518445 2166 275 6.5-15
17.5×6.75

Axle – Farm Axle Brake Series

Model Capacity Brake Track Axle tube Wheel Fixing Bearing DIM D
T mm mm mm Stud P.C.D. C.B.D.   mm
UTF6S60B 6 300×100 1800 Solid 60×60 6-M20x1.5 275 220 32211/ 33571 587.5
UTF8S80B 8 300×100 1800 Solid 80×80 8-M20x1.5 275 220 32212/32215 587.5
UTF9S90B 9 300×100 1800 Solid 90×90 8-M20x1.5 275 220 32211/33014 587.5

Axle – Farm Axle Unbrake Series
 

Model Capacity Track Axle tube Wheel Fixing Bearing Total Length
T mm mm Stud P.C.D. C.B.D.   mm
UTS60UB 6 1840 60 6-M18x1.5 205 160 35711/35718 2571
UTF7S70UB 7 1840 70 6-M18x1.5 205 160 35713/32210 2078
UTF8S80UB 8 1840 80 8-M18x1.5 275 220 32212/32215 2092
UTF9S90UB 9 1840 90 10-M18x1.5 335 281 32213/32216 2104
UTF10S100UB 10 1840 100 10-M18x1.5 335 281 32214/32217 2104
UTF12R127UB 12 1840 127 10-M18x1.5 335 281 33118/33213 2156

How to Choose the Right Worm Shaft

You might be curious to know how to choose the right Worm Shaft. In this article, you will learn about worm modules with the same pitch diameter, Double-thread worm gears, and Self-locking worm drive. Once you have chosen the proper Worm Shaft, you will find it easier to use the equipment in your home. There are many advantages to selecting the right Worm Shaft. Read on to learn more.
worm shaft

Concave shape

The concave shape of a worm’s shaft is an important characteristic for the design of a worm gearing. Worm gearings can be found in a wide range of shapes, and the basic profile parameters are available in professional and firm literature. These parameters are used in geometry calculations, and a selection of the right worm gearing for a particular application can be based on these requirements.
The thread profile of a worm is defined by the tangent to the axis of its main cylinder. The teeth are shaped in a straight line with a slightly concave shape along the sides. It resembles a helical gear, and the profile of the worm itself is straight. This type of gearing is often used when the number of teeth is greater than a certain limit.
The geometry of a worm gear depends on the type and manufacturer. In the earliest days, worms were made similar to simple screw threads, and could be chased on a lathe. During this time, the worm was often made with straight-sided tools to produce threads in the acme plane. Later, grinding techniques improved the thread finish and reduced distortions resulting from hardening.
When a worm gearing has multiple teeth, the pitch angle is a key parameter. A greater pitch angle increases efficiency. If you want to increase the pitch angle without increasing the number of teeth, you can replace a worm pair with a different number of thread starts. The helix angle must increase while the center distance remains constant. A higher pitch angle, however, is almost never used for power transmissions.
The minimum number of gear teeth depends on the angle of pressure at zero gearing correction. The diameter of the worm is d1, and is based on a known module value, mx or mn. Generally, larger values of m are assigned to larger modules. And a smaller number of teeth is called a low pitch angle. In case of a low pitch angle, spiral gearing is used. The pitch angle of the worm gear is smaller than 10 degrees.
worm shaft

Multiple-thread worms

Multi-thread worms can be divided into sets of one, two, or 4 threads. The ratio is determined by the number of threads on each set and the number of teeth on the apparatus. The most common worm thread counts are 1,2,4, and 6. To find out how many threads you have, count the start and end of each thread and divide by two. Using this method, you will get the correct thread count every time.
The tangent plane of a worm’s pitch profile changes as the worm moves lengthwise along the thread. The lead angle is greatest at the throat, and decreases on both sides. The curvature radius r” varies proportionally with the worm’s radius, or pitch angle at the considered point. Hence, the worm leads angle, r, is increased with decreased inclination and decreases with increasing inclination.
Multi-thread worms are characterized by a constant leverage between the gear surface and the worm threads. The ratio of worm-tooth surfaces to the worm’s length varies, which enables the wormgear to be adjusted in the same direction. To optimize the gear contact between the worm and gear, the tangent relationship between the 2 surfaces is optimal.
The efficiency of worm gear drives is largely dependent on the helix angle of the worm. Multiple thread worms can improve the efficiency of the worm gear drive by as much as 25 to 50% compared to single-thread worms. Worm gears are made of bronze, which reduces friction and heat on the worm’s teeth. A specialized machine can cut the worm gears for maximum efficiency.

Double-thread worm gears

In many different applications, worm gears are used to drive a worm wheel. These gears are unique in that the worm cannot be reversed by the power applied to the worm wheel. Because of their self-locking properties, they can be used to prevent reversing motion, although this is not a dependable function. Applications for worm gears include hoisting equipment, elevators, chain blocks, fishing reels, and automotive power steering. Because of their compact size, these gears are often used in applications with limited space.
Worm sets typically exhibit more wear than other types of gears, and this means that they require more limited contact patterns in new parts. Worm wheel teeth are concave, making it difficult to measure tooth thickness with pins, balls, and gear tooth calipers. To measure tooth thickness, however, you can measure backlash, a measurement of the spacing between teeth in a gear. Backlash can vary from 1 worm gear to another, so it is important to check the backlash at several points. If the backlash is different in 2 places, this indicates that the teeth may have different spacing.
Single-thread worm gears provide high speed reduction but lower efficiency. A multi-thread worm gear can provide high efficiency and high speed, but this comes with a trade-off in terms of horsepower. However, there are many other applications for worm gears. In addition to heavy-duty applications, they are often used in light-duty gearboxes for a variety of functions. When used in conjunction with double-thread worms, they allow for a substantial speed reduction in 1 step.
Stainless-steel worm gears can be used in damp environments. The worm gear is not susceptible to rust and is ideal for wet and damp environments. The worm wheel’s smooth surfaces make cleaning them easy. However, they do require lubricants. The most common lubricant for worm gears is mineral oil. This lubricant is designed to protect the worm drive.
worm shaft

Self-locking worm drive

A self-locking worm drive prevents the platform from moving backward when the motor stops. A dynamic self-locking worm drive is also possible but does not include a holding brake. This type of self-locking worm drive is not susceptible to vibrations, but may rattle if released. In addition, it may require an additional brake to keep the platform from moving. A positive brake may be necessary for safety.
A self-locking worm drive does not allow for the interchangeability of the driven and driving gears. This is unlike spur gear trains that allow both to interchange positions. In a self-locking worm drive, the driving gear is always engaged and the driven gear remains stationary. The drive mechanism locks automatically when the worm is operated in the wrong manner. Several sources of information on self-locking worm gears include the Machinery’s Handbook.
A self-locking worm drive is not difficult to build and has a great mechanical advantage. In fact, the output of a self-locking worm drive cannot be backdriven by the input shaft. DIYers can build a self-locking worm drive by modifying threaded rods and off-the-shelf gears. However, it is easier to make a ratchet and pawl mechanism, and is significantly less expensive. However, it is important to understand that you can only drive 1 worm at a time.
Another advantage of a self-locking worm drive is the fact that it is not possible to interchange the input and output shafts. This is a major benefit of using such a mechanism, as you can achieve high gear reduction without increasing the size of the gear box. If you’re thinking about buying a self-locking worm gear for a specific application, consider the following tips to make the right choice.
An enveloping worm gear set is best for applications requiring high accuracy and efficiency, and minimum backlash. Its teeth are shaped differently, and the worm’s threads are modified to increase surface contact. They are more expensive to manufacture than their single-start counterparts, but this type is best for applications where accuracy is crucial. The worm drive is also a great option for heavy trucks because of their large size and high-torque capacity.

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