OEM/ODM Series 31300-Single Row Tapered Roller Bearings Company, Factory

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Series 31300-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]
31305	T7FB025	25	63	17	13	18.25	1.5	1.5	20	6300	8500	38	39	0.83	0.73	0.4	34	32	47	59	3	5	0.28
31306	T7FB030	30	72	19	14	20.75	1.5	1.5	24	5300	7000	45.5	47.5	0.83	0.7	0.4	40	37	55	68	3	6.5	0.41
31307	T7FB035	35	80	21	15	22.75	2	2	26	4800	6300	60	65.5	0.83	0.73	0.4	44	44	62	76	4	7.5	0.54
31308	T7FB040	40	90	23	17	25.25	2	1.5	30	4000	5300	76.5	83	0.83	0.73	0.4	51	49	71	86	4	8	0.75
31309	T7FB045	45	100	25	18	27.25	2	1.5	32	3400	4500	96.5	110	0.83	0.73	0.4	56	54	79	95	4	9	1
31310	T7FB050	50	110	27	19	29.25	2.5	2	35	3200	4300	112	127	0.83	0.73	0.4	62	60	87	104	4	10	1.4
31311	T7FB055	55	120	29	21	31.5	2.5	2	39	2800	3800	125	140	0.83	0.73	0.4	68	65	94	113	4	10.5	1.6
31312	T7FB060	60	130	31	22	33.5	3	2.5	41	2600	3600	145	170	0.83	0.73	0.4	73	72	103	123	5	11.5	1.9
31313	T7GB065	65	140	33	23	36	3	2.5	44	2200	3200	163	190	0.83	0.73	0.4	79	77	111	132	5	13	2.6
31314	T7GB070	70	150	35	25	38	3	2.5	47	2000	3000	186	220	0.83	0.73	0.5	84	82	118	141	5	13	2.9
31315	T7GB075	75	160	37	26	40	3	2.5	50	1900	2800	204	240	0.83	0.73	0.4	91	87	127	151	6	14	3.4
31316	T7GB080	80	170	39	27	42.5	3	2.5	53	1900	2800	228	270	0.83	0.73	0.4	97	92	134	159	6	15.5	4.2
31317	T7GB085	85	180	41	28	44.5	4	3	55	1800	2600	255	305	0.83	0.73	0.4	103	99	143	169	6	16.5	4.9
31318	T7GB090	90	190	43	30	46.5	4	3	58	1700	2400	275	325	0.83	0.73	0.4	109	104	151	179	6	16.5	5.4
31319	T7GB095	95	200	45	32	49.5	4	3	61	1700	2400	275	325	0.83	0.73	0.4	114	109	157	187	6	17.5	6.7
31320	T7GB100	100	215	51	35	56.5	4	3	68	1600	2200	380	480	0.83	0.73	0.4	121	114	168	202	7	21.5	8.8
31321	--	105	225	53	36	58	4	3	--	1600	2200	397	489	0.83	0.73	0.4	123	126	193	193	--	--	9.72
31322	T7GB110	110	240	57	38	63	4	3	75	1400	1900	465	585	0.83	0.73	0.4	135	124	188	224	7	25	12.3
31324	T7GB120	120	260	62	42	68	4	3	82	1200	1700	540	695	0.83	0.73	0.4	145	134	203	244	9	26	15.1
31326	T7GB130	130	280	66	44	72	5	4	87	1100	1600	610	800	0.83	0.73	0.4	157	148	218	261	9	28	19.2
31328	T7GB140	140	300	70	47	77	5	4	94	1000	1500	695	900	0.83	0.73	0.4	169	158	235	280	9	30	23.4
31330	T7GB150	150	320	75	50	82	5	4	100	950	1400	780	1020	0.83	0.73	0.4	171	168	251	300	9	32	28.5
31332	--	160	340	79	54	87	5	4	--	1000	1500	850	1220	0.83	0.7	0.4	205	185	307	323	--	--	34.5
31334	--	170	360	84	56	92	5	4	--	950	1400	965	1400	0.83	0.7	0.4	219	198	326	344	--	--	40.9
31336	--	180	380	88	60	97	5	4	--	950	1400	1040	1530	0.83	0.7	0.4	230	209	343	360	--	--	47.7
31338	--	190	400	92	65	101	5	4	--	900	1300	1120	1630	0.73	0.8	0.5	249	220	355	385	--	--	54.1
31340	--	200	420	97	70	107	5	4	--	850	1200	1320	1900	0.79	0.8	0.1	251	229	372	391	--	--	65.1

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1. Performance Specifications of Series 31300 Bearings

The performance specifications of Series 31300 Single Row Tapered Roller Bearings exemplify their capability to operate reliably and efficiently across diverse industrial applications. With a grease lubrication rating of 6300 and an oil lubrication rating of 8500, these bearings offer an impressive range of operational speeds while maintaining optimal performance. The grease lubrication rating of 6300 signifies the maximum rotational speed, measured in revolutions per minute (RPM), at which the bearing can operate effectively when lubricated with grease. This rating reflects the bearing's ability to withstand moderate speeds while ensuring adequate lubrication and heat dissipation, crucial factors for prolonging bearing life and preventing premature failure. Similarly, the oil lubrication rating of 8500 denotes the maximum RPM at which the bearing can operate when lubricated with oil. Oil lubrication offers advantages such as enhanced cooling and debris removal, allowing Series 31300 bearings to sustain higher speeds and heavier loads compared to grease lubrication. This versatility makes them suitable for applications requiring dynamic performance and operational flexibility. The lightweight construction of Series 31300 bearings, typically weighing around 0.28kg, contributes to their agility and responsiveness in dynamic systems. Reduced inertia enables quicker acceleration and deceleration, essential for applications where rapid changes in speed and direction are common.

2. Installation Best Practices

The installation of Series 31300 Single Row Tapered Roller Bearings demands meticulous attention to detail and adherence to best practices to ensure optimal performance and longevity. Proper installation procedures not only prevent premature bearing failure but also maximize operational efficiency and minimize maintenance requirements. First and foremost, alignment is paramount during installation to ensure uniform distribution of load across the bearing surfaces. Misalignment can lead to increased friction, uneven wear, and ultimately, bearing failure. Utilizing precision alignment tools and techniques, such as dial indicators or laser alignment systems, helps achieve the desired alignment accuracy within specified tolerances. Applying the appropriate preload to the bearings is essential for minimizing internal clearance and preventing excessive axial or radial play. Preload ensures proper contact between the bearing elements, promoting uniform load distribution and reducing the risk of vibration or noise during operation. Torque application during installation should be carried out according to manufacturer recommendations to achieve the optimal clamping force without overloading or distorting the bearing components. Using calibrated torque wrenches and following prescribed tightening sequences help maintain consistent preload and prevent damage to the bearing assembly. Regular inspection and verification of installation parameters, such as alignment, preload, and torque, are essential to detect any discrepancies or deviations from the prescribed values. Periodic maintenance checks, particularly during scheduled downtime, enable timely correction of any issues and ensure continued reliability and performance of Series 31300 bearings throughout their service life.

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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 31300-Single Row Tapered Roller Bearings OEM/ODM

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Series 31300-Single Row Tapered Roller Bearings

Ningbo DHK Precision Bearing Co., Ltd.

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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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