Product Description

Tapered Roller Bearing 18437/Tractor Bearing/Auto Parts/Car Accessories/Roller Bearing

Feature

• Quality Materials
• Precision Tolerance
• Optimizing Internal Geometries

 

Sr.No.	Bearing No.	Dimension (MM)
		d	D	B
1	32004	20	42	12
2	32005	25	47	15
3	32006	30	55	17
4	32007	35	62	18
5	32008	40	68	19
6	32009	45	75	20
7	32571	50	80	20
8	32011	55	90	23
9	32012	60	95	23
10	32013	65	100	23
11	32014	70	110	25
12	32015	75	115	25
13	32016	80	125	29
14	32017	85	130	29
15	32018	90	140	32
16	32019	95	145	32
17	32571	100	150	32
18	35712	15	35	11.75
19	35713	17	40	13.25
20	35714	20	47	15.25
21	35715	25	52	16.25
22	35716	30	62	17.25
23	35717	35	72	18.25
24	35718	40	80	19.75
25	35719	45	85	20.75
26	35710	50	90	21.75
27	35711	55	100	22.75
28	35712	60	110	23.75
29	35713	65	120	24.75
30	35714	70	125	26.25
31	35715	75	130	27.25
32	35716	80	140	28.25
33	35717	85	150	30.5
34	35718	90	160	32.5
35	35719	95	145	32
36	30302	15	42	14.25
37	30303	15	47	15.25
38	30304	20	52	16.25
39	30305	25	62	18.25
40	30306	30	72	20.75
41	30307	35	80	22.75
42	30308	40	90	25.25
43	30309	45	100	27.25
44	3571	50	110	29.25
45	3571	55	120	31.5
46	3571	60	130	33.5
47	3571	65	140	36
48	3571	70	150	38
49	3571	75	160	40
50	32204	20	47	19.5
51	32205	25	52	19.25
52	32206	30	62	21.25
53	32207	35	72	24.25
54	32208	40	80	24.75
55	32209	45	85	24.75
56	32210	50	90	24.75
57	32211	50	100	26.75
58	32212	60	110	29.75
59	32213	65	120	32.75
60	32214	70	125	33.25
61	32215	75	130	33.25
62	32216	80	140	35.25
63	32217	85	150	38.5
64	32218	90	160	42.5
65	32305	25	62	25.25
66	32306	30	72	28.75
67	32307	35	80	32.75
68	32308	40	90	35.25
69	32309	40	100	38.25
70	32310	50	110	42.25
71	32311	55	120	45.5
72	32312	60	130	48.5
73	32313	65	140	51
74	7813E	65	110	30.5
75	7814E	70	117	33
76	7815E	75	135	44.8
77	7816E	80	140	45
78	31305	25	62	17
79	31306	30	72	21
80	31307	35	80	21
81	31308	40	90	23
82	31309	45	100	25
83	31310	50	110	27
84	31311	55	130	31.5
85	31312	60	130	31
86	31313	65	140	33
87	31314	70	150	38
88	7713	65	130	45
89	33005	25	47	17
90	33006	30	55	20
91	33007	35	62	20
92	33008	40	68	22
93	33009	45	75	24
94	33571	50	80	24
95	33011	55	90	27
96	33012	60	95	27
97	33013	65	100	27
98	33014	70	110	31
99	33015	75	115	31
100	33108	40	75	26
101	33109	45	80	26
102	33110	50	85	26
103	33111	55	95	30
104	33112	60	100	30
105	33113	65	110	34
106	33114	70	120	37
107	33115	75	125	37
108	33116	80	130	37
109	33117	85	140	41
110	33118	90	150	45
111	33205	25	52	22
112	33206	30	60	25
113	33207	35	72	28
114	33208	40	80	32
115	33209	45	85	32
116	33210	50	90	32
117	33211	55	100	35
118	33212	60	110	38
119	33213	65	120	41
120	33214	70	125	41
121	33215	75	130	41
122	LM11749/10	17.462	39.878	13.843
123	LM11949/10	19.05	45.237	15.494
124	LM12749/10	21.986	45.237	15.494
125	LM12749/11	21.986	45.974	15.494
126	LM12649/10	21.43	50.005	17.526
127	LM67048/10	31.75	59.131	15.875
128	LM78349/10	34.988	61.973	16.7
129	LM48548/10	34.925	65.088	18.034
130	LM300849/11	40.988	67.975	17.5
131	LM501349/10	41.275	73.431	19.558
132	LM157149/10	45.242	73.431	19.558
133	LM503349/10	45.987	74.976	18
134	LM603049/10	45.242	77.788	19.842
135	L45449/10	29	50.292	14.224
136	L44643/10	25.4	50.292	14.224
137	L44649/10	26.98	50.292	14.244
138	L68149/10	34.98	59.131	15.875
139	L68149/11	34.98	59.975	15.875
140	JL69349/10	38	63	17
141	M84548/10	25.4	57.15	19.431
142	M88048/10	33.338	68.262	22.225
143	HM88648/10	35.717	72.233	25.4
144	JLM104948/10	50	82	21.5
145	HM518445/10	88.9	152.4	39.688
146	32909	45	68	15
147	29590/29522	66.675	107.95	19.05
148	320/32	58	32	17

Product Description
 

• Tapered roller bearing normally be composed of a cup and a cone assembly, it precisely designed to manage both axial and radial load, even in the most unforgiving conditions . Single row tapered roller bearings are the most basic and widely used, CZPT built the first production lines in 1996 and today offers the world’s widest variety both in inch and metric sizes.
   
  1. with performance-enhancing features for severe-duty applications, VAFEM LM-Series wheel bearings help increase fuel efficiency, improve load-carrying capacity, fit in popular axle and hub designs – and simplify installation – helping you gain fleet uptime. Commercial Vehicle Hub Rebuild Kits are available for severe duty, dual and wide single tire applications .

 

• Design Attributes:

1. Raw material: Manufactured with reliable  super-clean chrome steel, these long-lasting bearings are designed to meet severe-duty application requirements.
2. Tight tolerances: Uniform internal geometry, including angle of contact for cones and rollers, creates a precise match between cup and cone – extending bearing life.
3. Precision profiles: Internal raceway profiles reduce stress on bearing components by distributing the loads evenly across contact surfaces – increasing load-carrying capacity.
4. Super finishing surface: Advanced automatic finishing processes generate smoother surface finishes on races and rollers to reduce friction – helping increase fuel efficiency.
5. Flexibility: Engineered for severe-duty applications in any configuration – dual and wide singles – LM-Series wheel bearings maintain consistency and simplicity within fleets.
6. Compatibility: LM-Series wheel bearings fit popular axle and hub designs, allowing retrofit into existing equipment.

Design Attributes:

• Accurate Bearing Setting: Set-Right kits feature bearings that significantly reduce the width variation found in standard bearings. Our tight bearing width tolerance enables consistent and accurate bearing setting of pre-adjusted hubs.
• Consistent Bearing Setting: Consistently achieve proper wheel bearing setting, avoiding the need for manual bearing adjustment and promoting optimum bearing and seal life.
• Streamlined Inventory Management: With a wide range of part numbers, each kit features 2 VAFEM  matched bearing sets and a precision-machined spacer (various of spacer types available).
• More Uptime: manufactured with super-clean high-strength chrome steel, precision profiles and enhanced surface finishes, feature high load ratings, and outlast and outperform competitor bearings.
  Longer Bearing Life and Performance

1. As a domestic leader in roller bearing technology, we develop bearings to outlast and outperform those frequently used on original equipment.

 
Applications
 

• Commercial vehicles  (original equipment and aftermarket)
• Wheel hub Kits ( After market )
• Heavy duty trucks, tractors and construction machinery (original equipment and aftermarket)

 

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.

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.

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.

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.