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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
	NU406M	30	90	23	1.5	1.5	2.3	71	64	7000	8500	--	45	--	67.8	--	--	0.87	--
	NJ406M	30	90	23	1.5	1.5	--	71	64	7000	8500	--	45	50.5	67.8	7	11.5	0.87	0.09
	NUP406M	30	90	23	1.5	1.5	--	71	64	7000	8500	--	45	50.5	67.8	--	--	0.87	--
	NU1007M	35	62	14	1	0.6	2.6	23.6	24.5	10000	13000	--	42	44.5	51.9	4	7.75	0.18	0.02
	N207E	35	72	17	1.1	0.6	1.7	50	50	8500	10000	64	--	48	--	--	--	0.305	--
	NU207E	35	72	17	1.1	0.6	1.7	50	50	8500	10000	--	44	--	60.1	--	--	0.305	--
	NJ207E	35	72	17	1.1	0.6	--	50	50	8500	10000	--	44	48	60.1	4	7	0.305	0.033
	NUP207E	35	72	17	1.1	0.6	--	50	50	8500	10000	--	44	48	60.1	--	--	0.305	--
	NU2207E	35	72	23	1.1	0.6	2.9	62	65.5	8500	10000	--	44	--	60.1	--	--	0.395	--
	NJ2207E	35	72	23	1	0.6	2.9	62	65.5	8500	10000	--	44	48	60.1	4	8.5	0.395	0.035
	NUP2207E	35	72	23	1	0.6	--	62	65.5	8500	10000	--	44	48	60.1	--	--	0.395	--
	N307E	35	80	21	1.5	1.1	1.7	64	63	7500	9000	70.2	--	51.2	--	--	--	0.485	--
	NU307E	35	80	21	1.5	1.1	1.7	64	63	7500	9000	--	46.2	--	65.7	--	--	0.485	--
	NJ307E	35	80	21	1.5	1.1	--	64	63	7500	9000	--	46.2	51.2	65.7	6	9.5	0.485	0.062
	NUP307E	35	80	21	1.5	1.1	--	64	63	7500	9000	--	46.2	51.2	65.7	--	--	0.485	--
	NU2307E	35	80	31	1.5	1.1	3	91.5	98	7500	9000	--	46.2	--	65.7	--	--	0.715	--
	NJ2307E	35	80	31	1.5	1.1	--	91.5	98	7500	9000	--	46.2	51.2	65.7	6	11	0.715	0.065
	NUP2307E	35	80	31	1.5	1.1	--	91.5	98	7500	9000	--	46.2	51.2	65.7	--	--	0.715	--
	N407M	35	100	25	1.5	1.5	2.6	75	69.5	6300	7500	83	--	59	--	--	--	1.05	--
	NU407M	35	100	25	1.5	1.5	2.6	75	69.5	6300	7500	--	53	--	77.6	--	--	1.05	--
	NJ407M	35	100	25	1.5	1.5	--	75	69.5	6300	7500	--	53	59	77.6	8	13	1.05	0.13
	NUP407M	35	100	25	1.5	1.5	--	75	69.5	6300	7500	--	53	59	77.6	--	--	1.05	--
	NU1008M	40	68	15	1	0.6	2.7	29	32	9500	12000	--	47	50	57.6	4	8	0.23	0.03
	N208E	40	80	18	1.1	1.1	1.9	53	53	7500	9000	71.5	--	54.1	--	--	--	0.38	--
	NU208E	40	80	18	1.1	1.1	1.9	53	53	7500	9000	--	49.5	--	67.3	--	--	0.38	--
	NJ208E	40	80	18	1.1	1.1	--	53	53	7500	9000	--	49.5	54.1	67.3	5	8.5	0.38	0.05
	NUP208E	40	80	18	1.1	1.1	--	53	53	7500	9000	--	49.5	54.1	67.3	--	--	0.38	--
	NU2208E	40	80	23	1.1	1.1	2.3	71	75	7500	9000	--	49.5	--	67.3	--	--	0.49	--
	NJ2208E	40	80	23	1.1	1.1	--	71	75	7500	9000	--	49.5	54.1	67.3	5	9	0.49	0.05
	NUP2208E	40	80	23	1.1	1.1	--	71	75	7500	9000	--	49.5	54.1	67.3	--	--	0.49	--
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