Double Row Angular Contact Ball Bearings

Material: Chrome steel
Precision: P0, P6, P5, P4, P2
Radial clearance: C0, C3, C2, C4
Number of Row: Double row
Package: Tube package, Single box
Free samples and technical drawing: Available
Delivery terms: FOB, CIF, EXW, CFR
Payment terms: T/T, L/C, Paypal, Western union, Moneygram
Certificate: ISO9001:2015

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● Introduction

In design, double row angular contact ball bearings are basically the same as single row angular contact ball bearings, but the former only takes up less axial space, with better rigidity and can withstand overturning moments. The bearing can withstand radial loads and axial loads acting in two directions. It can prevent the two-way axial displacement of the shaft or the housing, so it is mainly used in components that limit the two-way axial displacement of the shaft and the housing, so as to provide relatively rigid High bearing arrangement for applications where axial space is limited when two single row angular contact ball bearings are arranged in a back-to-back arrangement. The double row angular contact ball bearings generally adopts nylon cage or brass solid cage. Bearings are non-separable, especially suitable for occasions requiring high rigidity, and are widely used in front wheel hubs of cars.

Double row angular contact bearings are widely used in related fields, including oil pumps, blowers, air compressors, various transmissions, fuel injection pumps, printing machinery, planetary reducers, extraction equipment, cycloid reducers, food packaging machinery, inspection and analysis equipment, fine chemicals machinery, etc.

● Bearing Series

As for angular contact ball bearings structure, there are A type with outer diameter less than or equal to 90mm, A type and E type with outer diameter larger than 90mm, A type and E type with dust cover and sealing ring. As for bearing types, there are 38 series, 30 series, 32 series, 33 series.

● Production Details

◆ Turning of angular contact ball bearing cages

Most of them are ball-shaped integral cage structures, and the processing process is roughly as follows: rough turning (ring) → flat end face, inner diameter of the turning → taper (expanding) pockets and marking on non-reference planes → (boring oval holes) → finishing the inner and outer diameters → finishing the end face → marking → deburring.

Check the center diameter and shape of the ball pocket through the sample plate, check the rolling depth through the steel ball pressure test, if the hand can push in without falling, it is qualified.

Check the elliptical hole by measuring the short axis of the plug gauge, measure the long axis by the piece-shaped plug gauge, and visually inspect the joint of the two circles, there should be no obvious steps.

ntn angular contact ball bearing

◆ Defects in forging processing

1. White spots of internal defects, that is, there are silver-white spots with smooth surface on the longitudinal section of the steel after hot working, round or oval. They seriously affect the elongation, area reduction and impact toughness of the workpiece.

2. Due to improper forging, internal cracks in the shape of chicken feet or herringbone appear, and subtle cracks will also appear, which destroys the continuity of the metal. When the workpiece is subjected to high loads, especially repeated loads, it will fail early.

3. Surface defects have surface scarring, which makes the workpiece prone to stress concentration and fatigue fracture. The resulting burrs or scratches will affect the correct clamping and efficiency of the turning process, and severe scratches will reduce the strength of the steel and lead to cracks.

4. The end face concave center produced by rolling and expanding will increase the turning amount of turning or cause the forging to be scrapped.

3204 bearing

● Bearing Dynamic Load Rating and Rating Life

For the bearings selected for each specific occasion, it is usually unrealistic to determine their suitability through a large number of bearing tests. However, life is a major manifestation of suitability, so it can be considered that a reliable life calculation can be an appropriate and convenient substitute for testing. The calculation method of bearing dynamic load rating specified in GB/T6391-2003/ISO281:1990 is based on material fatigue failure (appearance of pits). The basic rating life of radial ball bearings is the life associated with 90 percent reliability, which is usually associated with high quality materials and good machining quality and normal operating conditions.

● FAQ (Frequently Asked Questions)

Q1: How long will our the inquiry and question be answered?

A1: After receiving your inquiry and question, we will reply you within 1 to 6 hours.

Q2: How about the quality of bearings?

A2: We supply high quality bearings and strictly follow ISO9001 standard for production.

Q3: What is the MOQ of the products?

A3: Usually the MOQ is 1 piece, and depending on the model.

Q4: How about the Delivery time of the products?

A4: Usually the delivery time is 3 to 15 days, and depending on the quantity.

Q5: How do you control the quality of the products and check the quality before delivery?

A5: Our company has a professional quality inspection department, which strictly controls the quality of products, and has complete after-sale service.

● About Us

Shaanxi Gainhui Heavy Industries Co., Ltd. is a professional bearing manufacturer and and distributor in china. Equipped with a professional large factory, we can supply competitive bearing products and OEM service to worldwide customers. With high quality, competitive price and great after-sale service of double row angular contact ball bearings, welcome to contact us in time.

Because we are focused, we are professional.

● Packing Methods

Tube Package

Single Box Package

Pallet Package

● Delivery Methods

By Express

By Sea

By Air

● Technical Parameters

angular contact double row ball bearings

Bearing designation	Dimensions (mm)											Basic dynamic load rating	Basic static load rating	Fatigue load limit	Limiting speed	Reference speed	Mass
	d	D	B	r	D1	D2	d1	a	da	Da	ra	Cr	Cor	Cur	nG	nB	m
				min.	≈	≈	≈	≈	min.	max.	max.	N	N	N	min–1	min–1	≈kg
30/5-B-TVH	5	14	7	0.2	–	–	7.5	6.3	6.4	12.6	0.2	1 810	950	48.5	30 000	32 000	0.008
30/5-B-2Z-TVH	5	14	7	0.2	–	–	7.5	6.3	6.4	12.6	0.2	1 810	950	48.5	24 000	32 000	0.008
30/5-B-2RSR-TVH	5	14	7	0.2	–	–	7.5	6.3	6.4	12.6	0.2	1 810	950	48.5	15 000	–	0.008
30/6-B-TVH	6	17	9	0.3	–	–	8.3	8.8	8	15	0.3	3 100	1 420	72	28 000	32 000	0.01
30/6-B-2Z-TVH	6	17	9	0.3	–	–	8.3	8.8	8	15	0.3	3 100	1 420	72	22 000	32 000	0.01
30/6-B-2RSR-TVH	6	17	9	0.3	–	–	8.3	8.8	8	15	0.3	3 100	1 420	72	15 000	–	0.01
30/7-B-TVH	7	19	10	0.3	–	–	9	10	9	17	0.3	3 650	1 700	86	26 000	31 500	0.012
30/7-B-2Z-TVH	7	19	10	0.3	–	–	9	10	9	17	0.3	3 650	1 700	86	20 000	31 500	0.012
30/7-B-2RSR-TVH	7	19	10	0.3	–	–	9	10	9	17	0.3	3 650	1 700	86	15 000	–	0.012
30/8-B-TVH	8	22	11	0.3	–	–	10.5	10.7	10	20	0.3	5 200	2 650	133	26 000	26 000	0.02
30/8-B-2Z-TVH	8	22	11	0.3	–	–	10.5	10.7	10	20	0.3	5 200	2 650	133	19 000	26 000	0.02
30/8-B-2RSR-TVH	8	22	11	0.3	–	–	10.5	10.7	10	20	0.3	5 200	2 650	133	14 000	–	0.02
3800-B-TVH	10	19	7	0.3	–	–	13	8.1	12	17	0.3	2 120	1 400	71	26 000	21 100	0.008
3800-B-2Z-TVH	10	19	7	0.3	–	–	13	8.1	12	17	0.3	2 120	1 400	71	18 000	21 100	0.008
3800-B-2RSR-TVH	10	19	7	0.3	–	–	13	8.1	12	17	0.3	2 120	1 400	71	16 000	–	0.008
3000-B-TVH	10	26	12	0.3	–	–	13.5	12.3	12	24	0.3	5 700	3 250	164	24 000	22 100	0.022
3000-B-2Z-TVH	10	26	12	0.3	–	–	13.5	12.3	12	24	0.3	5 700	3 250	164	17 000	22 100	0.022
3000-B-2RSR-TVH	10	26	12	0.3	–	–	13.5	12.3	12	24	0.3	5 700	3 250	164	14 000	–	0.022
3200-B-TVH	10	30	14	0.6	23.9	–	17.9	15	14.2	25.8	0.6	7 800	4 550	223	22 000	19 300	0.05
3200-B-2Z-TVH	10	30	14	0.6	–	25.3	17.9	15	14.2	25.8	0.6	7 800	4 550	223	16 000	19 300	0.051
3801-B-TVH	12	21	7	0.3	–	–	15	8.9	14	19	0.3	2 190	1 550	79	24 000	18 100	0.008
3801-B-2Z-TVH	12	21	7	0.3	–	–	15	8.9	14	19	0.3	2 190	1 550	79	17 000	18 100	0.008
3801-B-2RSR-TVH	12	21	7	0.3	–	–	15	8.9	14	19	0.3	2 190	1 550	79	15 000	–	0.008
3001-B-TVH	12	28	12	0.3	–	–	15.5	13	14	26	0.3	6 200	3 750	191	22 000	19 400	0.025
3001-B-2Z-TVH	12	28	12	0.3	–	–	15.5	13	14	26	0.3	6 200	3 750	191	16 000	19 400	0.025
3001-B-2RSR-TVH	12	28	12	0.3	–	–	15.5	13	14	26	0.3	6 200	3 750	191	13 000	–	0.025
3201-B-TVH	12	32	15.9	0.6	25.7	–	18.3	17	16.2	27.8	0.6	10 600	5 850	295	20 000	20 000	0.051
3201-B-2Z-TVH	12	32	15.9	0.6	–	28.1	18.3	17	16.2	27.8	0.6	10 600	5 850	295	15 000	20 000	0.053
3802-B-TVH	15	24	7	0.3	–	–	18	10.1	17	22	0.3	2 430	1960	99	22 000	14 800	0.009
3802-B-2Z-TVH	15	24	7	0.3	–	–	18	10.1	17	22	0.3	2 430	1960	99	16 000	14 800	0.009
3802-B-2RSR-TVH	15	24	7	0.3	–	–	18	10.1	17	22	0.3	2 430	1960	99	14 000	–	0.009
3002-B-TVH	15	32	13	0.3	–	–	20.4	14.8	17	30	0.3	8 600	5400	275	20 000	15 800	0.036
3002-B-2Z-TVH	15	32	13	0.3	–	–	20.4	14.8	17	30	0.3	8 600	5400	275	15 000	15 800	0.036
3002-B-2RSR-TVH	15	32	13	0.3	–	–	20.4	14.8	17	30	0.3	8 600	5400	275	12 000	–	0.036
3202-B-TVH	15	35	15.9	0.6	28.8	–	21.1	18	19.2	30.8	0.6	11 800	7100	360	19 000	17 100	0.065
3202-B-2Z-TVH	15	35	15.9	0.6	–	30.9	21.1	18	19.2	30.8	0.6	11 800	7100	360	14 000	17 100	0.067
3202-B-2RSR-TVH	15	35	15.9	0.6	–	30.9	21.1	18	19.2	30.8	0.6	11 800	7100	360	12 000	–	0.067
3302-B-TVH	15	42	19	1	34.5	–	25.6	21	20.6	36.4	1	16 300	10 000	460	16 000	11 000	0.124
3803-B-TVH	17	26	7	0.3	–	–	20	10.9	19	24	0.3	2 480	2080	107	19 000	13 200	0.015
3803-B-2Z-TVH	17	26	7	0.3	–	–	20	10.9	19	24	0.3	2 480	2080	107	14 000	13 200	0.015
3803-B-2RSR-TVH	17	26	7	0.3	–	–	20	10.9	19	24	0.3	2 480	2080	107	12 000	–	0.015
3003-B-TVH	17	35	14	0.3	–	–	21.6	15.5	19	33	0.3	9 200	6200	315	18 000	15 400	0.042
3003-B-2Z-TVH	17	35	14	0.3	–	–	21.6	15.5	19	33	0.3	9 200	6200	315	13 000	15 400	0.042
3003-B-2RSR-TVH	17	35	14	0.3	–	–	21.6	15.5	19	33	0.3	9 200	6200	315	11 000	–	0.042
3203-B-TVH	17	40	17.5	0.6	33.1	–	24	20	21.2	35.8	0.6	14 600	9000	420	17 000	15 500	0.093
3203-B-2Z-TVH	17	40	17.5	0.6	–	35.1	24	20	21.2	35.8	0.6	14 600	9000	420	12 000	15 500	0.095
3203-B-2RSR-TVH	17	40	17.5	0.6	–	35.1	24	20	21.2	35.8	0.6	14 600	9000	420	10 000	–	0.095
3303-B-TVH	17	47	22.2	1	37.7	–	26.2	24	22.6	41.4	1	20 800	12 500	570	15 000	11 500	0.177
3804-B-TVH	20	32	10	0.3	–	–	24.3	14.3	22	30	0.3	5 800	4850	245	17 000	11 900	0.02
3804-B-2Z-TVH	20	32	10	0.3	–	–	24.3	14.3	22	30	0.3	5 800	4850	245	12 000	11 900	0.02