Product Description

Tapered Roller Bearing 32312/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)

 

Screw Sizes and Their Uses

Screws have different sizes and features. This article will discuss screw sizes and their uses. There are 2 main types: right-handed and left-handed screw shafts. Each screw features a point that drills into the object. Flat tipped screws, on the other hand, need a pre-drilled hole. These screw sizes are determined by the major and minor diameters. To determine which size of screw you need, measure the diameter of the hole and the screw bolt’s thread depth.

The major diameter of a screw shaft

The major diameter of a screw shaft is the distance from the outer edge of the thread on 1 side to the tip of the other. The minor diameter is the inner smooth part of the screw shaft. The major diameter of a screw is typically between 2 and 16 inches. A screw with a pointy tip has a smaller major diameter than 1 without. In addition, a screw with a larger major diameter will have a wider head and drive.
The thread of a screw is usually characterized by its pitch and angle of engagement. The pitch is the angle formed by the helix of a thread, while the crest forms the surface of the thread corresponding to the major diameter of the screw. The pitch angle is the angle between the gear axis and the pitch surface. Screws without self-locking threads have multiple starts, or helical threads.
The pitch is a crucial component of a screw’s threading system. Pitch is the distance from a given thread point to the corresponding point of the next thread on the same shaft. The pitch line is 1 element of pitch diameter. The pitch line, or lead, is a crucial dimension for the thread of a screw, as it controls the amount of thread that will advance during a single turn.

The pitch diameter of a screw shaft

When choosing the appropriate screw, it is important to know its pitch diameter and pitch line. The pitch line designates the distance between adjacent thread sides. The pitch diameter is also known as the mean area of the screw shaft. Both of these dimensions are important when choosing the correct screw. A screw with a pitch of 1/8 will have a mechanical advantage of 6.3. For more information, consult an application engineer at Roton.
The pitch diameter of a screw shaft is measured as the distance between the crest and the root of the thread. Threads that are too long or too short will not fit together in an assembly. To measure pitch, use a measuring tool with a metric scale. If the pitch is too small, it will cause the screw to loosen or get stuck. Increasing the pitch will prevent this problem. As a result, screw diameter is critical.
The pitch diameter of a screw shaft is measured from the crest of 1 thread to the corresponding point on the next thread. Measurement is made from 1 thread to another, which is then measured using the pitch. Alternatively, the pitch diameter can be approximated by averaging the major and minor diameters. In most cases, the pitch diameter of a screw shaft is equal to the difference between the two.

The thread depth of a screw shaft

Often referred to as the major diameter, the thread depth is the outermost diameter of the screw. To measure the thread depth of a screw, use a steel rule, micrometer, or caliper. In general, the first number in the thread designation indicates the major diameter of the thread. If a section of the screw is worn, the thread depth will be smaller, and vice versa. Therefore, it is good practice to measure the section of the screw that receives the least amount of use.
In screw manufacturing, the thread depth is measured from the crest of the screw to the root. The pitch diameter is halfway between the major and minor diameters. The lead diameter represents the amount of linear distance traveled in 1 revolution. As the lead increases, the load capacity decreases. This measurement is primarily used in the construction of screws. However, it should not be used for precision machines. The thread depth of a screw shaft is essential for achieving accurate screw installation.
To measure the thread depth of a screw shaft, the manufacturer must first determine how much material the thread is exposed to. If the thread is exposed to side loads, it can cause the nut to wedge. Because the nut will be side loaded, its thread flanks will contact the nut. The less clearance between the nut and the screw, the lower the clearance between the nut and the screw. However, if the thread is centralized, there is no risk of the nut wedgeing.

The lead of a screw shaft

Pitch and lead are 2 measurements of a screw’s linear distance per turn. They’re often used interchangeably, but their definitions are not the same. The difference between them lies in the axial distance between adjacent threads. For single-start screws, the pitch is equal to the lead, while the lead of a multi-start screw is greater than the pitch. This difference is often referred to as backlash.
There are 2 ways to calculate the pitch and lead of a screw. For single-start screws, the lead and pitch are equal. Multiple-start screws, on the other hand, have multiple starts. The pitch of a multiple-start screw is the same as its lead, but with 2 or more threads running the length of the screw shaft. A square-thread screw is a better choice in applications requiring high load-bearing capacity and minimal friction losses.
The PV curve defines the safe operating limits of lead screw assemblies. It describes the inverse relationship between contact surface pressure and sliding velocity. As the load increases, the lead screw assembly must slow down in order to prevent irreversible damage from frictional heat. Furthermore, a lead screw assembly with a polymer nut must reduce rpm as the load increases. The more speed, the lower the load capacity. But, the PV factor must be below the maximum allowed value of the material used to make the screw shaft.

The thread angle of a screw shaft

The angle between the axes of a thread and the helix of a thread is called the thread angle. A unified thread has a 60-degree angle in all directions. Screws can have either a tapped hole or a captive screw. The screw pitch is measured in millimeters (mm) and is usually equal to the screw major diameter. In most cases, the thread angle will be equal to 60-degrees.
Screws with different angles have various degrees of thread. Originally, this was a problem because of the inconsistency in the threading. However, Sellers’s thread was easier to manufacture and was soon adopted as a standard throughout the United States. The United States government began to adopt this thread standard in the mid-1800s, and several influential corporations in the railroad industry endorsed it. The resulting standard is called the United States Standard thread, and it became part of the ASA’s Vol. 1 publication.
There are 2 types of screw threads: coarse and fine. The latter is easier to tighten and achieves tension at lower torques. On the other hand, the coarse thread is deeper than the fine one, making it easier to apply torque to the screw. The thread angle of a screw shaft will vary from bolt to bolt, but they will both fit in the same screw. This makes it easier to select the correct screw.

The tapped hole (or nut) into which the screw fits

A screw can be re-threaded without having to replace it altogether. The process is different than that of a standard bolt, because it requires threading and tapping. The size of a screw is typically specified by its major and minor diameters, which is the inside distance between threads. The thread pitch, which is the distance between each thread, is also specified. Thread pitch is often expressed in threads per inch.
Screws and bolts have different thread pitches. A coarse thread has fewer threads per inch and a longer distance between threads. It is therefore larger in diameter and longer than the material it is screwed into. A coarse thread is often designated with an “A” or “B” letter. The latter is generally used in smaller-scale metalworking applications. The class of threading is called a “threaded hole” and is designated by a letter.
A tapped hole is often a complication. There is a wide range of variations between the sizes of threaded holes and nut threads, so the tapped hole is a critical dimension in many applications. However, even if you choose a threaded screw that meets the requisite tolerance, there may be a mismatch in the thread pitch. This can prevent the screw from freely rotating.