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Single Row Cylindrical Roller Bearings

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Design Variants

Misalignment

Cage

Tolerance

Internal clearance

Single row cylindrical roller bearings are available in several basic designs that differ from each other in number and arrangement of their flanges, the most important design variants are shown below.

图片1.png

N type bearings features two integral flanges on the inner ring and outer ring without flanges.

NU type bearings features two integral flanges on the outer ring and inner ring without flanges, N and NU type bearings belong to the Non-locating bearings, they are not able to accommodate any axial loads.

NJ type bearings features two integral flanges on the outer ring and one integral flange on the inner ring, this allows them to accommodate axial loads in one direction only.

NUP type bearings have two integral flanges on the outer ring, one integral flange on the inner ting and a loose rib, so it is locating bearing and can accept axial loads in either direction.

NJ type bearings used in conjunction with thrust collars can build a locating bearing, which can accept axial loads in either direction.

Single row cylindrical roller bearings are available in several basic designs that differ from each other in number and arrangement of their flanges, the most important design variants are shown below.

N type bearings features two integral flanges on the inner ring and outer ring without flanges.
NU type bearings features two integral flanges on the outer ring and inner ring without flanges, N and NU type bearings belong to the Non-locating bearings, they are not able to accommodate any axial loads.
NJ type bearings features two integral flanges on the outer ring and one integral flange on the inner ring, this allows them to accommodate axial loads in one direction only.
NUP type bearings have two integral flanges on the outer ring, one integral flange on the inner ting and a loose rib, so it is locating bearing and can accept axial loads in either direction.
NJ type bearings used in conjunction with thrust collars can build a locating bearing, which can accept axial loads in either direction.
DHK single row cylindrical roller bearings have the rolling elements with modified outer diameter and crowning inner ring raceway, which minimize edge loading stresses between the rollers and raceway.
For applications operating under normal conditions the misalignment must not exceed 4 angular minutes.
For applications where higher misalignment may occur, DHK also produce single row cylindrical roller bearings with special crowned inner ring raceways (suffix B) to enable higher misalignments during operation.
DHK single row cylindrical roller bearings are available with all kinds material and design variants of cage upon request.
The most important materials and design variants of DHK single row cylindrical roller bearing cages are shown below.
Reinforced polyamide cages:
TN normal design of polyamide cage features holding lips on both side of roller pocket.
TN1 These are the enforced design of TN type.
TN2 Features holding lips on one side of roller pockets.This make it can raise the wall thickness of the cage at no-holding lip side, and therefore raised the strength of the cages.
Pressed Steel Cage: JP, JP1
Solid brass cages
M (MA, MB): normal design, features cage cover and cage body, rivetted by the steel rivets.
M2 (MA2, MB2): features cage body with round rivetting heads on its self and cage cover.
M6(MA6, MB6): features cage body with square riveting heads on its self and cage cover.

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

DHK also can provide these bearings with closer tolerance class such as P6 and P5, tolerance.

Detailed tolerance values are listed in the chapter of tolerance of radial bearings, page 8.

Tolerances for DHK single row cylindrical roller bearings (excluding tapered roller bearings)

All dimensions shown in (mm):

Tolerances in (um):

Inner Ring

PN/(Normal)

Nominal Bore diameter		Deviation dmp	Variation Vdp Series			Variation Vdmp	Taper bore 1:12 Deviation/ Variation
>	<=	△dmp	7．8．9	0．1	2．3．4	Vdmp	△dmp	△d1mp-dmp	Vdp
2.5 10		0 -8	10	8	6	6	+15 0	+15 0	10
10 18		0 -8	10	8	6	6	+18 0	+18 0	10
18 30		0 -10	13	10	8	8	+21 0	+21 0	13
30 50		0 -12	15	12	9	9	+25 0	+25 0	15
50 80		0 -15	19	19	11	11	+30 0	+30 0	19
80 120		0 -20	25	25	15	15	+35 0	+35 0	25
120 180		0 -25	31	31	19	19	+40 0	+40 0	31
180 250		0 -30	38	38	23	23	+46 0	+46 0	38
250 315		0 -35	44	44	26	26	+52 0	+52 0	44
315 400		0 -40	50	50	30	30	+57 0	+57 0	50
400 500		0 -45	56	56	34	34	+63 0	+63 0	56
500 630		0 -50	63	63	38	38	+70 0	+70 0
630 800		0 -75					+80 0	+80 0
800 1000		0 -100					+90 0	+90 0
1000 1250		0 -125					+105 0	+105 0
1250 1600		0 -160
1600 2000		0 -200

Outer ring

PN/(Normal)

Nominal Outer diameter		Deviation	Variation Vdp Series			Sealed bearing	Variation	Radial runout
>	<=	△Dmp	7．8．9	0．1	2．3．4	2 3 4	VDmp	Kea
6 18		0 -8	10	8	6	10	6	15
18 30		0 -9	12	9	7	12	7	15
30 50		0 -11	14	11	8	16	8	20
50 80		0 -13	16	13	10	20	10	25
80 120		0 -15	19	19	11	26	11	35
120 150		0 -18	23	23	14	30	14	40
150 180		0 -25	31	31	19	38	19	45
180 250		0 -30	38	38	23		23	50
250 315		0 -35	44	44	26		26	60
315 400		0 -40	50	50	30		30	70
400 500		0 -45	56	56	34		34	80
500 630		0 -50	63	63	38		38	100
630 800		0 -75	94	94	55		55	120
800 1000		0 -100	125	125	75		75	140
1000 1250		0 -125						160
1250 1600		0 -160						190
1600 2000		0 -200						220
2000 2500		0 -250						250

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

DHK also can provide these bearings with closer tolerance class such as P6 and P5, tolerance.

Detailed tolerance values are listed in the chapter of tolerance of radial bearings, page 8.

Tolerances for DHK single row cylindrical roller bearings (excluding tapered roller bearings)

All dimensions shown in (mm):

Tolerances in (um):

Inner Ring

PN/(Normal)

Nominal Bore diameter		Deviation dmp	Variation Vdp Series			Variation Vdmp	Taper bore 1:12 Deviation/ Variation
>	<=	△dmp	7．8．9	0．1	2．3．4	Vdmp	△dmp	△d1mp-dmp	Vdp
2.5 10		0 -8	10	8	6	6	+15 0	+15 0	10
10 18		0 -8	10	8	6	6	+18 0	+18 0	10
18 30		0 -10	13	10	8	8	+21 0	+21 0	13
30 50		0 -12	15	12	9	9	+25 0	+25 0	15
50 80		0 -15	19	19	11	11	+30 0	+30 0	19
80 120		0 -20	25	25	15	15	+35 0	+35 0	25
120 180		0 -25	31	31	19	19	+40 0	+40 0	31
180 250		0 -30	38	38	23	23	+46 0	+46 0	38
250 315		0 -35	44	44	26	26	+52 0	+52 0	44
315 400		0 -40	50	50	30	30	+57 0	+57 0	50
400 500		0 -45	56	56	34	34	+63 0	+63 0	56
500 630		0 -50	63	63	38	38	+70 0	+70 0
630 800		0 -75					+80 0	+80 0
800 1000		0 -100					+90 0	+90 0
1000 1250		0 -125					+105 0	+105 0
1250 1600		0 -160
1600 2000		0 -200

Outer ring

PN/(Normal)

Nominal Outer diameter		Deviation	Variation Vdp Series			Sealed bearing	Variation	Radial runout
>	<=	△Dmp	7．8．9	0．1	2．3．4	2 3 4	VDmp	Kea
6 18		0 -8	10	8	6	10	6	15
18 30		0 -9	12	9	7	12	7	15
30 50		0 -11	14	11	8	16	8	20
50 80		0 -13	16	13	10	20	10	25
80 120		0 -15	19	19	11	26	11	35
120 150		0 -18	23	23	14	30	14	40
150 180		0 -25	31	31	19	38	19	45
180 250		0 -30	38	38	23		23	50
250 315		0 -35	44	44	26		26	60
315 400		0 -40	50	50	30		30	70
400 500		0 -45	56	56	34		34	80
500 630		0 -50	63	63	38		38	100
630 800		0 -75	94	94	55		55	120
800 1000		0 -100	125	125	75		75	140
1000 1250		0 -125						160
1250 1600		0 -160						190
1600 2000		0 -200						220
2000 2500		0 -250						250

Dimensions and Parameters

Inquiry	Bearing NO.	Dimension						Basic load ratings		Limiting speed(rpm )		Bearing Dimension				Oblique retaining ring		Weight
Inquiry	Bearing NO.	d	D	B	r1 r2 min	r3 r4 min	S ≈	Dynamic(Cr)	Static(Cor)	Grease	Oil	E	F	d1 ≈	D1 ≈	B2	B3	Bearing	Oblique retaining ring
	NU3211M	55	100	33.3	1.5	1.1	4.5	119	171	5600	6700	--	66.9	--	--	--	--	1.2	--
	N311E	55	120	29	2	2	3	134	140	4800	5600	106.5	--	77.7	--	--	--	1.6	--
	NU311E	55	120	29	2	2	3	134	140	4800	5600	--	70.5	--	100.3	--	--	1.6	--
	NJ311E	55	120	29	2	2	--	134	140	4800	5600	--	70.5	77.7	100.3	9	14	1.6	0.2
	NUP311E	55	120	29	2	2	--	134	140	4800	5600	--	70.5	77.7	100.3	--	--	1.6	--
	NU2311E	55	120	43	2	2	4.3	200	228	4800	5600	--	70.5	77.7	100.3	--	--	2.3	--
	NJ2311E	55	120	43	2	2	--	200	228	4800	5600	--	70.5	77.7	100.3	9	15.5	2.3	0.2
	NUP2311E	55	120	43	2	2	--	200	228	4800	5600	--	70.5	77.7	100.3	--	--	2.3	--
	N411M	55	140	33	2.1	2.1	3.3	140	137	4300	5000	117.2	--	85.2	--	--	--	2.5	--
	NU411M	55	140	33	2.1	2.1	3.3	140	137	4300	5000	--	77.2	--	109.9	--	--	2.5	--
	NJ411M	55	140	33	2.1	2.1	--	140	137	4300	5000	--	77.2	85.2	109.9	10	16.5	2.5	0.31
	NUP411M	55	140	33	2.1	2.1	--	140	137	4300	5000	--	77.2	85.2	109.9	--	--	2.5	--
	NU1012M	60	95	18	1.1	1	3.3	44	55	6700	8000	--	69.5	72.5	81.7	5	10	0.49	0.06
	N212E	60	110	22	1.5	1.5	1.6	95	104	5300	6300	100	--	77.7	--	--	--	1	--
	NU212E	60	110	22	1.5	1.5	1.6	95	104	5300	6300	--	72	--	95.1	--	--	1	--
	NJ212E	60	110	22	1.5	1.5	--	95	104	5300	6300	--	72	77.7	95.1	6	10	1	0.11
	NUP212E	60	110	22	1.5	1.5	--	95	104	5300	6300	--	72	77.7	95.1	--	--	1	--
	NU2212E	60	110	28	1.5	1.5	2.4	129	153	5300	6300	--	72	--	95.1	--	--	1.2	--
	NJ2212E	60	110	28	1.5	1.5	--	129	153	5300	6300	--	72	77.7	95.1	6	10	1.2	0.11
	NUP2212E	60	110	28	1.5	1.5	--	129	153	5300	6300	--	72	77.7	95.1	--	--	1.2	--
	NUP3212E	60	110	36.5	1.5	1.5	4.5	150	211	5300	6300	--	72.4	--	--	--	--	1.59	--
	N312E	60	130	31	2.1	2.1	3	150	156	4300	5000	115	--	84.5	--	--	--	1.9	--
	NU312E	60	130	31	2.1	2.1	3	150	156	4300	5000	--	77	--	108.5	--	--	1.9	--
	NJ312E	60	130	31	2.1	2.1	--	150	156	4300	5000	--	77	84.5	108.5	9	14.5	1.9	0.24
	NUP312E	60	130	31	2.1	2.1	--	150	156	4300	5000	--	77	84.5	108.5	--	--	1.9	--
	NU2312E	60	130	46	2.1	2.1	4.2	224	260	4300	5000	--	77	--	108.5	--	--	2.9	--
	NJ2312E	60	130	46	2.1	2.1	--	224	260	4300	5000	--	77	84.5	108.5	9	16	2.9	0.24
	NUP2312E	60	130	46	2.1	2.1	--	224	260	4300	5000	--	77	84.5	108.5	--	--	2.9	--
	N412M	60	150	35	2.1	2.1	3.4	166	170	4000	4800	127	--	91.8	--	--	--	3.1	--
	NU412M	60	150	35	2.1	2.1	3.4	166	170	4000	4800	--	83	--	118.8	--	--	3.1	--
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