OEM/ODM Series 32900-Single Row Tapered Roller Bearings Company, Factory

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Series 32900-Single Row Tapered Roller Bearings

Metric Series
Inch series

Design Variants
Cage
Tolerance
Internal clearance

Additional the standard metric single row taper roller bearings listed in the bearing table, DHK also produced single row taper roller bearings with flanges on outer rings (suffix R), only outer rings of taper roller bearing (prefix L), inner rings with the cage and rollers (prefix R) and other special taper roller bearings according to customer

Due to the single row taper roller bearings only can accommodate one direction axial force, these bearings are frequently used as pairs. Upon request, DHK can provide these bearings at Face- to-Face arrangement (suffix DF), Back-to-Back arrangement (suffix DB) or in tandem arrangement (suffix DT), as shown in the below sketch.
DHK taper roller bearings are fitted with pressed steel cages as standard. Because the cages of taper roller bearings usually protrude beyond the bearing faces, special care must be taken to follow the recommended abutment dimensions.

DHK single row taper roller bearings are produced to normal tolerance class (PN) as standard.

These bearings also may be produced with closer tolerance such as P6X on request.

Detail tolerance values are listed in the chapter of tolerance of metric taper roller bearings, page 14. The width tolerance of paired bearings is decided by the clearance and Ts.

Tolerances for DHK metric taper roller bearings (excluding tapered roller bearings)

All dimensions shown in (mm):

Tolerances in (um):

Inner Ring

Tolerance class PN/(Normal)


Nominal bore diameter		Deviation	Variation	Variation	Ring width deviation	Radial runout	Ring width deviation
<=	<=	△dmp	Vdp	Vdmp	△Bs	Kia	△Ts	△T1s	△T2s
10 18		0 -12	12	9	0 -120	15	+2000	+1000	+1000
18 30		0 -12	12	9	0 -120	18	+2000	+1000	+1000
30 50		0 -12	12	9	0 -120	20	+2000	+1000	+1000
50 80		0 -15	15	11	0 -150	25	+2000	+1000	+1000
80 120		0 -20	20	15	0 -200	30	+200 -200	+100 -100	+100 -100
120 180		0 -25	25	19	0 -250	35	+350 -250	+150 -150	+200 -100
180 250		0 -30	30	23	0 -300	50	+350 -250	+150 -150	+200 -100
250 315		0 -35	35	26	0 -350	60	+350 -250	+150 -150	+200 -100
315 400		0 -40	40	30	0 -400	70	+400 -400	+200 -200	+200 -200
400 500		0 -45	45	34	0 -450	85	+400 -400
500 630		0 -50	50	38	0 -500	100	+500 -500
630 800		0 -75	75	56	0 -750	120	+600 -600
800 1000		0 -100	100	75	0 -1000	120	+750 -750
1000 1250		0 -1250			0 -1250	120	+1000 -1000
1250 1600		0 -160			0 -1600	120	+1500 -1500
1600 2000		0 -200			0 -2000	120	+1500 -1500

Outer Ring

Tolerance class PN/(Normal)

Nominal outer diameter		Deviation	Variation	Variation	Radial runout
<=	<=	△Dmp	VDp	VDmp	Kia
18 30		0 -12	12	9	18
30 50		0 -14	14	11	20
50 80		0 -16	16	12	25
80 120		0 -18	18	14	35
120 150		0 -20	20	15	40
150 180		0 -25	25	19	45
180 250		0 -30	30	23	50
250 315		0 -35	35	26	60
315 400		0 -40	40	30	70
400 500		0 -45	45	34	80
500 630		0 -50	50	38	100
630 800		0 -70	70	55	120
800 1000		0 -100	100	75	120
1000 1250		0 -125	125	94	120
1250 1600		0 -160	160	120	120
1600 2000		0 -200			120
2000 2500		0 -250

Tolerances for DHK metric taper roller bearings (excluding tapered roller bearings)

All dimensions shown in (mm):

Tolerances in (um):

Inner Ring

Tolerance class P6X

Nominal bore diameter		Deviation	Variation	Variation	Ring width deviation	Radial runout	Ring width deviation
<=	<=	△dmp	Vdp	Vdmp	△Bs	Kia	△Ts	△T1s	△T2s
10 18		0 -12	12	9	0 -50	15	+100 0	+50～0	+50～0
18 30		0 -12	12	9	0 -50	18	+100 0	+50～0	+50～0
30 50		0 -12	12	9	0 -50	20	+100 0	+50～0	+50～0
50 80		0 -15	15	11	0 -50	25	+100 0	+50～0	+50～0
80 120		0 -20	20	15	0 -50	30	+100 0	+50～0	+50～0
120 180		0 -25	25	19	0 -50	35	+150 0	+50～0	+100～0
180 250		0 -30	30	23	0 -50	50	+150 0	+50～0	+100～0
250 315		0 -35	35	26	0 -50	60	+200 0	+100～0	+100～0
315 400		0 -40	40	30	0 -50	70	+200 0	+100～0	+100～0
400 500
500 630
630 800
800 1000

Outer Ring
Tolerance class P6X

Nominal outer diameter		Deviation	Variation	Variation	Ring width deviation	Radial runout
<=	<=	△Dmp	VDp	VDmp	△Cs	Kea
18 30		0 -12	12	9	0 -100	18
30 50		0 -14	14	11	0 -100	20
50 80		0 -16	16	12	0 -100	25
80 120		0 -18	18	14	0 -100	35
120 150		0 -20	20	15	0 -100	40
150 180		0 -25	25	19	0 -100	45
180 250		0 -30	30	23	0 -100	50
250 315		0 -35	35	26	0 -100	60
315 400		0 -40	40	30	0 -100	70
400 500		0 -45	45	34	0 -100	80
500 630		0 -50	50	38	0 -100	100
630 800
800 1000

The width tolerance △Cs is identical to△Bs of inner ring of the same bearing

Tolerances for DHK metric taper roller bearings (excluding tapered roller bearings)

All dimensions shown in (mm):

Tolerances in (um):

Inner Ring

Tolerance class P5

Nominal bore diameter		Deviation	Variation	Variation	Ring width deviation	Radial runout	Side face runout
<=	<=	△dmp	Vdp	Vdmp	△Bs	Kia	Ｓd	△Ts
10 18		0 -7	5	5	0 -200	5	7	+200 -200
18 30		0 -8	6	5	0 -200	5	8	+200 -200
30 50		0 -10	8	5	0 -240	6	8	+200 -200
50 80		0 -12	9	6	0 -300	7	8	+200 -200
80 120		0 -15	11	8	0 -400	8	9	+200 -200
120 180		0 -18	14	9	0 -500	11	10	+350 -250
180 250		0 -22	17	11	0 -600	13	11	+350 -250
250 315		0 -25	19	13	0 -700	16	13	+350 -250
315 400		0 -30	23	15	0 -800	19	15	+400 -400
400 500		0 -35	26	18	0 -900	22	17	+400 -400
500 630		0 -40	30	20	0 -1000	26	20	+500 -500
630 800		0 -50	50	25	0 -1500	30	26	+600 -600
800 1000		0 -65	60	30	0 -2000	35	32	+750 -750

Outer Ring
Tolerance class P5

Nominal outer diameter		Deviation	Variation	Variation	Radial runout	Outside inclination variation
<=	<=	△Dmp	VDp	VDmp	Kea
18 30		0 -8	6	5	6	8
30 50		0 -9	7	5	7	8
50 80		0 -11	8	6	8	8
80 120		0 -13	10	7	10	9
120 150		0 -15	11	8	11	10
150 180		0 -18	14	9	13	10
180 250		0 -20	15	10	15	11
250 315		0 -25	19	13	18	13
315 400		0 -28	22	14	20	13
400 500		0 -33	25	17	23	15
500 630		0 -38	29	19	25	18
630 800		0 -45	34	23	30	20
800 1000		0 -60	45	30	35	25
1000 1250		0 -80	75	38	40	30
1250 1600		0 -100	90	45	45	35

The width tolerance △Cs is identical to△Bs of inner ring of the same bearing

Tolerances for DHK metric taper roller bearings (excluding tapered roller bearings)
All dimensions shown in (mm):
Tolerances in (um):

Inner Ring
Tolerance class P4

Nominal bore diameter		Deviation	Variation	Variation	Ring width deviation	Radial runout	Side face runout	Side face runout	Ring width deviation
<=	<=	△dmp △ds	Vdp	Vdmp	△Bs	kia	Sd	Sia	△Ts
10 18		0 -5	4	4	0 -200	3	3	3	+200 -200
18 30		0 -6	5	4	0 -200	3	4	4	+200 -200
30 50		0 -7	6	5	0 -240	4	4	4	+200 -200
50 80		0 -8	7	5	0 -300	4	5	4	+200 -200
80 120		0 -10	8	5	0 -400	5	5	5	+200 -200
120 180		0 -13	10	7	0 -500	6	6	7	+350 -250
180 250		0 -15	11	8	0 -600	8	7	8	+350 -250

Outer Ring
Tolerance class P4

Nominal outer diameter		Deviation	Variation	Variation	Radial runout	Outside inclination variation	Side face runout
<=	<=	△Dmp △Ds	VDp	VDmp	Kea	SD	Sea
18 30		0 -6	5	4	4	4	5
30 50		0 -7	5	5	5	4	5
50 80		0 -9	7	5	5	4	5
80 130		0 -10	8	5	6	5	6
130 150		0 -11	8	6	7	5	7
150 180		0 -13	10	7	8	5	8
180 250		0 -15	11	8	10	7	10
250 315		0 -18	14	9	11	8	10
315 400		0 -20	15	10	13	10	13

The width tolerance △Cs and VCs are identical to△Bs and VBs of inner ring of the same bearing

The clearance of single row taper roller bearings is adjusted one bearing against another during mounting.

DHK taper roller bearing pairs arranged face-to- face (suffix DF) and back-to-back(suffix DB) are produced with internal clearance values, as listed in the table below. DHK can provide bearing pairs with special axial clearance upon request.

Axial Internal Clearance Of Paired DHK taper roller bearings,arranged face to face(DF) and back to back(DB)

Bore Dia. (mm)		Axial intcrnal clearance Series（μm）
>	<=	329 Min max	320 Min max X	330 Min max	331，3．2，332，332 Min max	303，323 Min max	313 Min max
-- 30		-- --	80 120	-- --	100 140	130 170	60 100
30 40		-- --	100 140	-- --	120 160	140 180	70 110
40 50		-- --	120 160	180 220	140 180	160 200	80 120
50 65		-- --	140 180	200 240	160 200	180 220	100 140
65 80		-- --	160 200	250 290	180 220	200 260	110 170
80 100		270 310	190 230	350 390	210 270	240 300	110 170
100 120		270 330	220 280	340 400	220 280	280 340	130 190
120 140		310 370	240 300	340 400	240 300	330 390	160 220
140 160		370 430	270 330	340 400	270 330	370 430	180 240
160 180		370 430	310 370	-- --	310 370	390 450	-- --
180 190		370 430	340 400	-- --	340 400	440 500	-- --
190 200		390 450	340 400	-- --	340 400	440 500	-- --
200 225		440 500	390 450	-- --	390 450	490 550	-- --
225 250		440 500	440 500	-- --	440 500	540 600	-- --
250 280		540 500	490 55	-- --	490 550	-- --	-- --
280 300		640 700	540 600	-- --	540 600	-- --	-- --
300 340		640 700	590 650	-- --	590 650	-- --	-- --

Model		Dimensions								Extreme speed		Rated load		Calculation factor			Abutment and fillet dimensions(mm)						Weight [kg]
DIN720	ISO355	d	D	B	C	T	r1,r2 min	r3,r4 min	a	Grease lubrication	Oil lubrication	Dynamic load	Static load	e	Y	Yo	Da max	db min	da min	Db min	Ca min	Cb min	Weight [kg]
32920	T2GB110	100	140	25	20	25	1.5	1.5	45	2000	3000	117	205	0.33	1.8	1	112	106	131	131	--	--	1.18
32921	--	105	145	25	20	25	1.5	1.5	--	1700	2400	119	212	0.34	1.8	0.96	117	111	136	136	--	--	1.23
32922	--	110	150	25	20	25	1.5	1.5	--	2000	3000	123	24	0.36	1.7	0.93	122	116	141	146	--	--	1.29
32926	--	130	180	32	25	32	2	1.5	--	1700	2400	198	365	0.33	1.8	1	139	141	167	173	--	--	2.4
32928	--	140	190	32	25	32	2	1.5	--	1600	2200	205	390	0.35	1.7	0.9	149	150	181	184	--	--	2.55
32930	--	150	210	38	30	38	2.5	2	--	1500	2000	270	500	0.33	1.8	1	171	148	193	205	--	--	3.88
32930	--	160	220	36	31	38	2.5	2	--	1100	1600	250	455	0.35	1.7	0.95	178	168	206	215	--	--	4.06
32934	--	170	230	36	31	38	2.5	2	--	1200	1700	258	485	0.36	1.6	0.9	188	178	216	225	--	--	4.3
32936	--	180	250	42	36	45	2.5	2	--	1200	1700	310	570	0.37	1.6	0.88	200	189	234	244	--	--	6.22
32938	--	190	260	42	36	45	2.5	2	--	950	1400	335	645	0.39	1.5	0.85	210	199	244	254	--	--	6.59
32940	--	200	280	51	39	51	3	2.5	--	1000	1500	475	950	0.4	1.5	0.8	212	217	268	271	--	--	9.39
32944	--	220	300	51	39	51	3	2.5	--	900	1300	475	1000	0.43	1.4	0.8	--	--	--	--	--	--	10.1
32948	--	240	320	51	39	51	3	2.5	--	900	1300	490	1080	0.46	1.3	0.7	252	255	308	311	--	--	109
32952	--	260	360	63.5	48	63.5	3	2.5	--	900	1300	710	1500	0.41	1.5	0.8	294	253	332	351	--	--	18.8
32956	--	280	380	63.5	48	63.5	3	2.5	--	800	1100	710	1560	0.43	1.4	0.8	292	298	368	368	--	--	19.9
32960	--	300	420	76	57	76	4	3	--	700	950	930	2040	0.39	1.5	0.8	314	324	406	405	--	--	31.3
32964	T4FD200	320	440	72	63	76	4	3	--	670	900	1000	2320	0.42	1.4	0.8	334	343	428	426	9	16	33.6
32968	--	340	460	76	57	76	4	3	--	630	850	1040	2450	0.44	1.4	0.8	357	361	440	446	--	--	33.6
32972	--	360	480	76	57	76	4	3	--	600	800	1020	2400	0.46	1.5	0.82	377	380	464	466	--	--	35.8
32976	--	380	520	82	71	87	5	4	--	560	750	1210	2550	0.39	1.6	0.86	418	396	487	501	--	--	49.5
32980	--	400	540	82	71	87	5	4	--	500	720	1250	2700	0.4	1.5	0.82	439	417	508	530	--	--	52.7
32984	--	420	560	82	72	87	5	4	--	480	630	1300	2810	0.41	1.5	0.81	458	436	528	550	--	--	54.8
32988	--	440	600	95	82	100	4	4	--	450	600	1600	3450	0.35	1.7	0.93	458	473	543	581	--	--	76

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1. Construction and Design of Series 32900 Bearings

Single Row Tapered Roller Bearings within Series 32900 are meticulously engineered components designed to withstand high radial and axial loads while maintaining operational integrity under demanding conditions. Their construction consists of several key elements, each contributing to the bearing's overall performance and reliability. The inner ring, also known as the cone, and the outer ring, termed the cup, form the primary structural components of the bearing assembly. Both rings feature tapered raceways, which serve to facilitate the smooth movement of the tapered rollers. These raceways are precision-machined to ensure optimal contact between the rollers and the rings, distributing loads evenly and minimizing stress concentrations. Tapered rollers are arranged in a single row between the inner and outer rings. These rollers are tapered both on their inner and outer surfaces, matching the tapered raceways of the rings. This design enables the rollers to accommodate both radial and axial forces, transmitting them efficiently through the bearing assembly. The tapered shape of the rollers helps to reduce friction and minimize heat generation during operation, contributing to improved efficiency and longevity. A cage assembly is employed to maintain proper spacing and alignment of the rollers within the bearing. The cage, typically made of steel or brass, prevents the rollers from contacting each other, reducing the risk of friction-induced wear and ensuring smooth rotation. It also facilitates lubricant distribution throughout the bearing, promoting efficient operation and minimizing the risk of premature failure. In Series 32900 Single Row Tapered Roller Bearings, careful attention is paid to material selection and manufacturing processes to ensure the highest standards of quality and performance. High-quality alloy steels are commonly used for the inner and outer rings, rollers, and cage components, providing exceptional strength, durability, and resistance to wear and fatigue.

2. Abutment and Fillet Dimensions of Series 32900 Bearings

Abutment and fillet dimensions are critical parameters that influence the installation, mounting, and operation of Series 32900 Single Row Tapered Roller Bearings. These dimensions define the relationship between the bearing and its mating components, such as shafts and housings, ensuring proper fitment and alignment to optimize performance and prevent premature failure. In Series 32900 bearings, abutment dimensions refer to the maximum and minimum diameters of the bearing's inner and outer rings, as well as the corresponding dimensions of the shaft and housing. These dimensions are specified to ensure proper seating and alignment of the bearing within its housing and to provide adequate clearance for the shaft to rotate freely without interference. Similarly, fillet dimensions specify the radii of curvature at the corners and edges of the bearing's inner and outer rings. These fillet radii help to distribute stress concentrations and minimize the risk of stress-induced cracking or deformation, particularly under high load conditions or during installation and operation.

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What are the potential consequences of using improper or damaged rolling mill bearings in terms of safety and performance?

How do environmental factors, such as temperature and humidity, affect the performance of rolling mill bearings?

Are there any specific alignment requirements for screw compressor bearings to optimize performance and reduce wear?

What are the best practices for installing and mounting bearings in engineering machinery to ensure proper functionality?

What are the potential risks associated with over-lubrication or under-lubrication of motor bearings?

How do factors such as load capacity and rotational speed requirements influence the selection of bearings for different agricultural applications?

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Series 32900-Single Row Tapered Roller Bearings

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Latest News

What are the potential consequences of using improper or damaged rolling mill bearings in terms of safety and performance?

How do environmental factors, such as temperature and humidity, affect the performance of rolling mill bearings?

Are there any specific alignment requirements for screw compressor bearings to optimize performance and reduce wear?

What are the best practices for installing and mounting bearings in engineering machinery to ensure proper functionality?

What are the potential risks associated with over-lubrication or under-lubrication of motor bearings?

How do factors such as load capacity and rotational speed requirements influence the selection of bearings for different agricultural applications?

Industry Knowledge Expansion

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