CH.RCU28

Precision extra floating roller RCU28 for high performance guide MR28, plain OD, concentric, two seals on both side

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Display : Metric Inch

ROLLER TYPE

	Concentric	Adjustability
	extra floating	Roller version

DIMENSIONS

D	17.8 mm	Roller diameter
C	9 mm	Roller width
B	10.75 mm	Overall width
B₁	1.75 mm	Width mounting surface to outer ring end face
d₁	10.8 mm	Shoulder diameter inner ring
g	M5	Thread size

LOAD RATINGS

C_r	2300 N	Dynamic load rating
C_0r	1120 N	Load capacity radial

MASS

≈m

20 g

Weight

FEATURES AND PERFORMANCE

	52100 \| 100Cr6 \| GCr15	Ring and ball material
	Nylon 66	Retainer material
	Seals	Sealing solution
	Kyodo Yushi Multemp SRL	Grease
	-20°C to +120°C	Temperature range °C
	-4°F to +248°F	Temperature range °F

TOLERANCES AND CLEARANCES

	P6 (ABEC-3)	Tolerance
	P5 (ABEC-5)	Radial run-out
	0.006-0.012	Radial clearance

MOUNTING INFORMATION

N	Allen Key 4	Flat Key (+0.15/-0mm)
M	6.25	Width running suface center to mounting surface
	DIN912 8.8	Screw standard
	M5	Screw size
N_M	7	Torgue

FOR RAILS AND SLIDERS

	28	For rail size
	MR	For rail type
	MR28	For rails
	RU28 \| RUS28	For sliders

CAD & PDF

We provide a variety of CAD files and sample generation. If you need them, please click the download button below to proceed with the download.

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T-RACE
RCU28

TOLERANCES AND CLEARANCES

Bearing tolerances and clearances

Tolerances: Normal, P6, P5
Internal clearance: Single row track rollers, Double row track rollers

ISO CERTIFICATE

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MOBILE APPS

Inner ring
d		tΔdmp		tVdsp¹⁾			tVdmp¹⁾	tΔBs			tVBs	tKia
				Diameter series				All	Normal	Modified³⁾
>	≤	U	L	7, 8, 9²⁾	0, 1	2, 3, 4		U	L	L
mm		μm		μm			μm	μm			μm	μm

–	2.5	0	–8	10	8	6	6	0	–40	–	12	10
2.5	10	0	–8	10	8	6	6	0	–120	–250	15	10
10	18	0	–8	10	8	6	6	0	–120	–250	20	10

18	30	0	–10	13	10	8	8	0	–120	–250	20	13
30	50	0	–12	15	12	9	9	0	–120	–250	20	15
50	80	0	–15	19	19	11	11	0	–150	–380	25	20

80	120	0	–20	25	25	15	15	0	–200	–380	25	25
120	180	0	–25	31	31	19	19	0	–250	–500	30	30
180	250	0	–30	38	38	23	23	0	–300	–500	30	40

250	315	0	–35	44	44	26	26	0	–350	–500	35	50
315	400	0	–40	50	50	30	30	0	–400	–630	40	60
400	500	0	–45	56	56	34	34	0	–450	–	50	65

500	630	0	–50	63	63	38	38	0	–500	–	60	70
630	800	0	–75	–	–	–	–	0	–750	–	70	80
800	1 000	0	–100	–	–	–	–	0	–1 000	–	80	90

1 000	1 250	0	–125	–	–	–	–	0	–1 250	–	100	100
1 250	1 600	0	–160	–	–	–	–	0	–1 600	–	120	120
1 600	2 000	0	–200	–	–	–	–	0	–2 000	–	140	140

Outer ring

D		tΔDmp		tVDsp⁴⁾				tVDmp⁴⁾	tΔCs, tVCs			tKea
				Open bearings			Capped bearings⁵⁾
				Diameter series			Capped bearings⁵⁾
>	≤	U	L	7, 8, 9²⁾	0, 1	2, 3, 4	2, 3, 4
mm		μm		μm				μm	μm			μm

2.5	18	0	–8	10	8	6	10	6	Identical to tΔBs and tVBs of an inner ring of the same bearing as the outer ring			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	1 000	0	–100	125	125	75	–	75				140
1 000	1 250	0	–125	–	–	–	–	–				160

1 250	1 600	0	–160	–	–	–	–	–				190
1 600	2 000	0	–200	–	–	–	–	–				220
2 000	2 500	0	–250	–	–	–	–	–				250

1) Except tapered bore. 2) Diameter series 7 and 8 not covered by ISO 492. 3) Applies to inner rings and outer rings of bearings of matched bearing sets consisting of two or more bearings. Does not apply to universally matchable angular contact ball bearings. 4) Applies to bearings prior to mounting and after removal of internal or external snap ring. 5) Capped bearings are sealed or shielded bearings.

Inner ring
d		tΔdmp¹⁾		tVdsp¹⁾			tVdmp	tΔBs			tVBs	tKia
				Diameter series				All	Normal	Modified³⁾
>	≤	U	L	7, 8, 9²⁾	0, 1	2, 3, 4		U	L	L
mm		μm		μm			μm	μm			μm	μm

–	2.5	0	–7	9	7	5	5	0	–40	–	12	5
2.5	10	0	–7	9	7	5	5	0	–120	–250	15	6
10	18	0	–7	9	7	5	5	0	–120	–250	20	7

18	30	0	–8	10	8	6	6	0	–120	–250	20	8
30	50	0	–10	13	10	8	8	0	–120	–250	20	10
50	80	0	–12	15	15	9	9	0	–150	–380	25	10

80	120	0	–15	19	19	11	11	0	–200	–380	25	13
120	180	0	–18	23	23	14	14	0	–250	–500	30	18
180	250	0	–22	28	28	17	17	0	–300	–500	30	20

250	315	0	–25	31	31	19	19	0	–350	–500	35	25
315	400	0	–30	38	38	23	23	0	–400	–630	40	30
400	500	0	–35	44	44	26	26	0	–450	–	45	35

500	630	0	–40	50	50	30	30	0	–500	–	50	40
630	800	0	–50	–	–	–	–	0	–750	–	60	45
800	1 000	0	–60	–	–	–	–	0	–1 000	–	60	50

1 000	1 250	0	–75	–	–	–	–	0	–1 250	–	70	60
1 250	1 600	0	–90	–	–	–	–	0	–1 600	–	70	70
1 600	2 000	0	–115	–	–	–	–	0	–2 000	–	80	80

Outer ring
D		tΔDmp		tVDsp⁴⁾				VDmp⁴⁾	tΔCs, tVCs			tKea
				Open bearings			Capped bearings⁵⁾
				Diameter series			Capped bearings⁵⁾
>	≤	U	L	7, 8, 9²⁾	0, 1	2, 3, 4	0, 1, 2, 3, 4
mm		μm		μm				μm	μm			μm

2.5	18	0	–7	9	7	5	9	5	Identical to tΔBs and tVBs of an inner ring of the same bearing as the outer ring			8
18	30	0	–8	10	8	6	10	6				9
30	50	0	–9	11	9	7	13	7				10

50	80	0	–11	14	11	8	16	8				13
80	120	0	–13	16	16	10	20	10				18
120	150	0	–15	19	19	11	25	11				20

150	180	0	–18	23	23	14	30	14				23
180	250	0	–20	25	25	15	–	15				25
250	315	0	–25	31	31	19	–	19				30

315	400	0	–28	35	35	21	–	21				35
400	500	0	–33	41	41	25	–	25				40
500	630	0	–38	48	48	29	–	29				50

630	800	0	–45	56	56	34	–	34				60
800	1 000	0	–60	75	75	45	–	45				75
1 000	1 250	0	–75	–	–	–	–	–				85

1 250	1 600	0	–90	–	–	–	–	–				100
1 600	2 000	0	–115	–	–	–	–	–				100
2 000	2 500	0	–135	–	–	–	–	–				120

1) Tolerances for tapered bores (except taper 1:12) 2) Diameter series 7 and 8 not covered by ISO 492. 3) Applies to inner rings and outer rings of bearings of matched bearing sets consisting of two or more bearings. Does not apply to universally matchable angular contact ball bearings. 4) Applies to bearings prior to mounting and after removal of internal or external snap ring. 5) Capped bearings are sealed or shielded bearings.

Inner ring
d		tΔdmp¹⁾		tVdsp¹⁾		tVdmp	tΔBs			tVBs	tKia	tSd	tSia³⁾
				Diameter series			All	Normal	Modified⁴⁾
>	≤	U	L	7, 8, 9²⁾	0, 1, 2, 3, 4		U	L	L
mm		μm		μm		μm	μm			μm	μm	μm	μm

–	2.5	0	–5	5	4	3	0	–40	–250	5	4	7	7
2.5	10	0	–5	5	4	3	0	–40	–250	5	4	7	7
10	18	0	–5	5	4	3	0	–80	–250	5	4	7	7

18	30	0	–6	6	5	3	0	–120	–250	5	4	8	8
30	50	0	–8	8	6	4	0	–120	–250	5	5	8	8
50	80	0	–9	9	7	5	0	–150	–250	6	5	8	8

80	120	0	–10	10	8	5	0	–200	–380	7	6	9	9
120	180	0	–13	13	10	7	0	–250	–380	8	8	10	10
180	250	0	–15	15	12	8	0	–300	–500	10	10	11	13

250	315	0	–18	18	14	9	0	–350	–500	13	13	13	15
315	400	0	–23	23	18	12	0	–400	–630	15	15	15	20
400	500	0	–28	28	21	14	0	–450	–	18	17	18	23

500	630	0	–35	35	26	18	0	–500	–	20	19	20	25
630	800	0	–45	–	–	–	0	–750	–	26	22	26	30
800	1 000	0	–60	–	–	–	0	–1 000	–	32	26	32	30

1 000	1 250	0	–75	–	–	–	0	–1 250	–	38	30	38	30
1 250	1 600	0	–90	–	–	–	0	–1 600	–	45	35	45	30
1 600	2 000	0	–115	–	–	–	0	–2 000	–	55	40	55	30

Outer ring
D		tΔDmp		tVDsp⁵⁾		tVDmp	tΔCs			tVCs	tKea	tSD⁶⁾	tSea³⁾
				Diameter series
>	≤	U	L	7, 8, 9²⁾	0, 1, 2, 3, 4
mm		μm		μm		μm	μm			μm	μm	μm	μm

2.5	18	0	–5	5	4	3	Identical to ΔBs and VBs of an inner ring of the same bearing as the outer ring			5	5	4	8
18	30	0	–6	6	5	3				5	6	4	8
30	50	0	–7	7	5	4				5	7	4	8

50	80	0	–9	9	7	5				6	8	4	10
80	120	0	–10	10	8	5				8	10	4,5	11
120	150	0	–11	11	8	6				8	11	5	13

150	180	0	–13	13	10	7				8	13	5	14
180	250	0	–15	15	11	8				10	15	5,5	15
250	315	0	–18	18	14	9				11	18	6,5	18

315	400	0	–20	20	15	10				13	20	6,5	20
400	500	0	–23	23	17	12				15	23	7,5	23
500	630	0	–28	28	21	14				18	25	9	25

630	800	0	–35	35	26	18				20	30	10	30
800	1 000	0	–50	50	29	25				25	35	12,5	–
1 000	1 250	0	–63	–	–	–				30	40	15	–

1 250	1 600	0	–80	–	–	–				35	45	17,5	–
1 600	2 000	0	–100	–	–	–				38	55	20	–
2 000	2 500	0	–125	–	–	–				45	65	25	–

	1) Tolerances for tapered bores (except taper 1:12 and 1：30). 2) Diameter series 7 and 8 not covered by ISO 492. 3) Applies to inner rings and outer rings of bearings of matched bearing sets consisting of two or more bearings. Does not apply to universally matchable angular contact ball bearings. 4) Applies to bearings prior to mounting and after removal of internal or external snap ring. 5) Capped bearings are sealed or shielded bearings.

Bore diameter		Radial internal clearance
d		C2		Normal		C3		C4		C5
>	≤	min.	max.	min.	max.	min.	max.	min.	max.	min.	max.
mm		µm

Stainless steel deep groove ball bearings with a bore diameter < 10 mm

-	9.525	3	8	5	10	8	13	13	20	20	28

All other deep groove ball bearings

2.5	6	0	7	2	13	8	23	–	–	–	–
6	10	0	7	2	13	8	23	14	29	20	37
10	18	0	9	3	18	11	25	18	33	25	45

18	24	0	10	5	20	13	28	20	36	28	48
24	30	1	11	5	20	13	28	23	41	30	53
30	40	1	11	6	20	15	33	28	46	40	64

40	50	1	11	6	23	18	36	30	51	45	73
50	65	1	15	8	28	23	43	38	61	55	90
65	80	1	15	10	30	25	51	46	71	65	105

80	100	1	18	12	36	30	58	53	84	75	120
100	120	2	20	15	41	36	66	61	97	90	140
120	140	2	23	18	48	41	81	71	114	105	160

140	160	2	23	18	53	46	91	81	130	120	180
160	180	2	25	20	61	53	102	91	147	135	200
180	200	2	30	25	71	63	117	107	163	150	230

200	225	2	35	25	85	75	140	125	195	175	265
225	250	2	40	30	95	85	160	145	225	205	300
250	280	2	45	35	105	90	170	155	245	225	340

280	315	2	55	40	115	100	190	175	270	245	370
315	355	3	60	45	125	110	210	195	300	275	410
355	400	3	70	55	145	130	240	225	340	315	460

400	450	3	80	60	170	150	270	250	380	350	520
450	500	3	90	70	190	170	300	280	420	390	570
500	560	10	100	80	210	190	330	310	470	440	630

560	630	10	110	90	230	210	360	340	520	490	700
630	710	20	130	110	260	240	400	380	570	540	780
710	800	20	140	120	290	270	450	430	630	600	860

800	900	20	160	140	320	300	500	480	700	670	960
900	1 000	20	170	150	350	330	550	530	770	740	1 040
1 000	1 120	20	180	160	380	360	600	580	850	820	1 150

1 120	1 250	20	190	170	410	390	650	630	920	890	1 260
1 250	1 400	30	200	190	440	420	700	680	1 000	–	–
1 400	1 600	30	210	210	470	450	750	730	1 060	–	–

Nominal		Axial internal clearance
bore diameter
d		C2		CN		C3		C4
		(Group 2)		(Group N)		(Group 3)		(Group 4)
mm		μm		μm		μm		μm
＞	≤	min.	max.	min.	max.	min.	max.	min.	max.
‒	10	1	11	5	21	12	28	25	45
10	18	1	12	6	23	13	31	27	47
18	24	2	14	7	25	16	34	27	47
24	30	2	15	8	27	18	37	30	50

30	40	2	16	9	29	21	40	33	54
40	50	2	18	11	33	23	44	36	58
50	65	3	22	13	36	26	48	40	63

65	80	3	24	15	40	30	54	46	71
80	100	3	26	18	46	35	63	55	83
100	120	4	30	22	53	42	73	65	96

120	140	4	34	25	59	48	82	74	108

CH.RCU28

TECHNICAL INFORMATION

INTERCHANGE CODE TABLE

TOLERANCES AND CLEARANCES

C&H BEARING WEBSITE