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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
	NJ260M	300	540	85	5	5	--	1400	2040	1100	1400	--	364	387	453.3	20	34.5	89.9	8.4
	NUP260M	300	540	85	5	5	--	1400	2040	1100	1400	--	364	--	--	--	--	90	--
	NU2260M	300	540	140	5	5	14	2080	3400	1000	1300	--	364	--	453.3	--	--	148	--
	NU360M	300	620	109	7.5	7.5	9.5	2080	3000	900	1100	--	388	--	506.7	--	--	168	--
	NU1964M	320	440	56	3	3	--	580	1050	1100	1400	--	352	--	--	--	--	25.7	--
	NU2964M	320	440	72	3	3	--	755	1470	1100	1400	--	352	--	--	--	--	33.5	--
	NJ1064M	320	480	74	4	4	--	905	1470	1100	1400	--	360	--	--	--	--	47.8	--
	NUP1064M	320	480	74	4	4	--	905	1470	1100	1400	--	360	--	--	--	--	49.1	--
	NU1064M	320	480	74	4	4	11.5	915	1500	1200	1500	--	360	376	423.1	19	36	.48.7	5.5
	NU264M	320	580	92	5	5	8.3	1600	2360	1000	1300	--	390	--	485.3	--	--	113	--
	NJ264M	320	580	92	5	5	--	1600	2360	1000	1300	--	390	415	485.3	21	37	113	10.2
	NU2264M	320	580	150	5	5	--	2260	3700	900	1200	--	390	--	--	--	--	181	--
	NU1968M	340	460	56	3	3	--	600	1120	1100	1400	--	372	--	--	--	--	27.1	--
	NU2968M	340	460	72	3	3	--	780	1570	1100	1400	--	372	--	--	--	--	33.7	--
	NU1068M	340	520	82	5	5	12.5	1120	1830	1100	1400	--	385	403	456	21	39.5	65	7.1
	NU268M	340	620	92	6	6	--	1590	2410	900	1200	--	420	--	--	--	--	128	--
	NU1972M	360	480	56	3	3	--	605	1160	1200	1500	--	392	--	--	--	--	68.8	--
	NU2972M	360	480	72	3	3	--	790	1630	1000	1300	--	392	--	--	--	--	36.7	--
	NU1072M	360	540	80	5	5	12.5	1140	1900	1100	1400	--	405	423	476.4	21	39.5	68.2	7.6
	NU272M	360	650	95	6	6	--	1650	2560	900	1100	--	445	--	--	--	--	--	--
	NU2272M	360	650	170	6	6	--	3500	6050	800	100	--	435	--	--	--	--	--	--
	NU2372M	360	750	224	7.5	7.5	--	4950	8700	700	850	--	455	--	--	--	--	--	--
	NU1976M	380	520	65	4	4	--	775	1470	850	1200	--	418	--	--	--	--	41.2	--
	NU1076M	380	560	80	5	5	12.5	1180	2000	1000	1300	--	425	--	496.7	--	--	71.2	--
	NU276M	380	680	95	6	6	--	1700	2700	850	1000	--	470	--	--	--	--	158	--
	NU2276M	380	680	175	6	6	--	3100	5250	750	900	--	--	--	--	--	--	--	--
	NU1980M	400	540	65	4	4	--	785	1520	1000	1200	--	438	--	--	--	--	43	--
	NU2980M	400	540	82	4	4	--	1060	2250	900	1100	--	438	--	--	--	--	54.9	--
	NU1080M	400	600	90	5	5	13.5	1370	2320	950	1200	--	450	--	526.5	--	--	92.5	--
	NJ1080M	400	600	90	5	5	--	1360	2280	900	1100	--	450	--	526.5	--	--	92.5	--
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