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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.

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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
	NU3217M	85	150	49.2	2	2	5.5	211	316	3800	4500	--	102	--	--	--	--	3.69	--
	N317E	85	180	41	3	3	3	270	300	3000	3600	160	--	118	--	--	--	5.3	--
	NU317E	85	180	41	3	3	3	270	300	3000	3600	--	108	--	151.3	--	--	5.3	--
	NJ317E	85	180	41	3	3	--	270	300	3000	3600	--	108	118	151.3	12	18.5	5.3	0.58
	NUP317E	85	180	41	3	3	--	270	300	3000	3600	--	108	118	151.3	--	--	5.3	--
	NU2317E	85	180	60	3	3	5	365	450	3000	3600	--	108	--	151.3	--	--	6.9	--
	NJ2317E	85	180	60	3	3	--	365	450	3000	3600	--	108	118	151.3	12	22	6.9	0.6
	NUP2317E	85	180	60	3	3	--	365	450	3000	3600	--	108	118	151.3	--	--	6.9	--
	N417M	85	210	52	4	4	5	335	355	2800	3400	177	--	126	--	--	--	9.8	--
	NU417M	85	210	52	4	4	5	335	355	2800	3400	--	113	--	164.8	--	--	9.8	--
	NJ417M	85	210	52	4	4	--	335	355	2800	3400	--	113	126	164.8	14	24	9.8	0.92
	NUP417M	85	210	52	4	4	--	335	355	2800	3400	--	113	126	164.8	--	--	9.8	--
	NU1018M	90	140	24	1.5	1.1	4	93	125	4500	4300	--	103	108	122.1	6	12	1.4	0.17
	N218E	90	160	30	2	2	1.4	183	216	3600	4300	145	--	114.5	--	--	--	2.4	--
	NU218E	90	160	30	2	2	1.4	183	216	3600	4300	--	107	--	138.5	--	--	2.4	--
	NJ218E	90	160	30	2	2	--	183	216	3600	4300	--	107	114.5	138.5	--	--	2.7	--
	NUP218E	90	160	30	2	2	--	183	216	3600	4300	--	107	114.5	138.5	9	14	2.4	0.33
	NU2218E	90	160	40	2	2	3.5	240	315	3600	4300	--	107	--	138.5	--	--	3.2	--
	NJ2218E	90	160	40	2	2	--	240	315	3600	4300	--	107	114.5	138.5	9	15	3.2	0.32
	NUP2218E	90	160	40	2	2	--	240	315	3600	4300	--	107	114.5	138.5	--	--	3.2	--
	NU3218E	90	160	52.4	2	2	6	237	355	3500	4200	--	107	--	--	--	--	4.48	--
	N318E	90	190	43	3	3	3	315	345	2800	3400	169.5	--	124	--	--	--	5.4	--
	NU318E	90	190	43	3	3	3	315	345	2800	3400	--	113.5	--	160.2	--	--	5.4	--
	NJ318E	90	190	43	3	3	--	315	345	2800	3400	--	113.5	124	160.2	12	18.5	5.4	0.63
	NUP318E	90	190	43	3	3	--	315	345	2800	3400	--	113.5	124	160.2	--	--	5.4	--
	NU2318E	90	190	64	3	3	6	430	530	2800	3400	--	113.5	--	160.2	--	--	8.1	--
	NJ2318E	90	190	64	3	3	--	430	530	2800	3400	--	113.5	124	160.2	12	22	8.1	0.68
	NUP2318E	90	190	64	3	3	--	430	530	2800	3400	--	113.5	124	160.2	--	--	8.1	--
	N418M	90	225	54	4	4	5	365	390	2600	3200	191.5	--	137	--	--	--	11.5	--
	NU418M	90	225	54	4	4	5	365	390	2600	3200	--	123.5	--	178.8	--	--	11.5	--
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