Technical Reference

Design of Bearing Arrangements

1.Housing

1)Bushes The housing bore should have a chamfer fGx20°±5°,This chamfer makes it easier to press the bushes into the housing. Housing bore diameter dG Chamfer withfG dG≤30 0.8±0.3 30<dG≤80 1.2±0.4 80<dG≤180 1.8±0.8 180<dG 2.5±1.0

2)Flanged Bushes The radius at the transition from the radial to the axial component must be taken into consideration for flange bushes. A sufficiently large chamfer must be provided on the housing to prevent the flanged bushes fouling in the area of the radius. Sufficient support must be provided for the flange in applications with axial loading. Housing bore diameter dG Chamfer withfG dG≤10 1.2±0.2 10<dG 1.7±0.2

2.Shaft

o make fitting easier, the shaft ends should be chamfered. All sharp edges which could damage the sliding layer must be broken. Higher surface qualities will extend the service life only slightly whereas greater roughness depths will reduce the service life considerably. Ground or drawn surfaces are preferred. The surface finish of the mating material should be between Ra 0.2- Ra0.8 um obtained by grinding normally.
Incorrect		Correct

3.Seals

If increased levels of contamination occur or the bearing is used in an aggressive environment, the bearing position should be protected. The usual solution is to design the surrounding structure so that the contamination cannot reach the bearing position. A collar of grease may also be used or shaft seals if the level of contamination is particularly high.

Mating Telerance

SHAFT TOLERANCE TABLE (ISO)
≥	＜	C9	D8	E7	E8	F7	G6	H5	H6	H7	H8	JS6	JS7	K6	M6	N6	P6	P7	R6	S6
—	3	-60	-20	-14	-14	-6	-2	0	0	0	0	±3	±5	6	8	10	12	16	16	20
		-85	-34	-24	-28	-16	-8	-4	-6	-10	-14			0	2	4	6	6	10	14
3	6	-70	-30	-20	-20	-10	-4	0	0	0	0	±4	±6	9	12	16	20	24	23	27
		-100	-48	-32	-38	-22	-12	-5	-8	-12	-18			1	4	8	12	12	15	19
6	10	-80	-40	-25	-25	-13	-5	0	0	0	0	±4.5	±7	10	15	19	24	30	28	32
		-116	-62	-40	-47	-28	-14	-6	-9	-15	-22			1	6	10	15	15	19	23
10	18	-95	-50	-32	-32	-16	-6	0	0	0	0	±5.5	±9	12	18	23	29	36	34	39
		-138	-77	-50	-59	-34	-17	-8	-11	-18	-27			1	7	12	18	18	23	28
18	24	-110	-65	-40	-40	-20	-7	0	0	0	0	±6.5	±10	15	21	28	35	43	41	48
24	30	-162	-98	-61	-73	-41	-20	-9	-13	-21	-33			2	8	15	22	22	28	35
30	40	-120	-80	-50	-50	-25	-9	0	0	0	0	±8	±12	18	25	33	42	51	50	59
		-182	-119	-75	-89	-50	-25	-11	-16	-25	-39			2	9	17	26	26	34	43
40	50	-130
		-192
50	65	-140	-100	-60	-60	-30	-10	0	0	0	0	±9.5	±15	21	31	39	51	62	60	72
		-214	-146	-90	-106	-60	-29	-13	-19	-30	-46			2	11	20	32	32	41	53
65	80	-150																	62	78
		-224																	43	59
80	100	-170	-120	-72	-72	-36	-12	0	0	0	0	±11	±17	25	35	45	59	72	73	93
		-257	-174	-107	-126	-71	-34	-15	-22	-35	-54			3	13	23	37	37	51	71
100	120	-180																	76	101
		-267																	54	79
120	140	-200	-145	-85	-85	-43	-14	0	0	0	0	±12.5	±20	28	40	52	68	83	88	117
		-300	-208	-125	-148	-83	-39	-18	-25	-40	-63			3	15	27	43	43	63	92
140	160	-210																	90	125
		-310																	65	100
160	180	-230																	93	133
		-330																	68	108
180	200	-240	-170	-100	-100	-50	-15	0	0	0	0	±14.5	±23	33	46	60	79	96	106	151
		-355	-242	-146	-172	-96	-44	-20	-29	-46	-72			14	17	31	50	50	77	122
200	225	-260																	109	159
		-375																	80	130
225	250	-280																	113	169
		-395																	84	140
250	280	-300	-190	-110	-110	-56	-17	0	0	0	0	±16	±26	36	52	66	88	108	126	190
		-430	-271	-162	-191	-108	-49	-23	-32	-52	-81			4	20	34	56	56	94	158
280	315	-330																	130	202
		-460																	98	170
315	355	-360	-210	-125	-125	-62	-18	0	0	0	0	±18	±28	40	57	73	98	119	114	226
		-500	-299	-182	-214	-119	-54	-25	-36	-57	-89			4	21	37	62	62	108	190
355	400	-400																	105	224
		540																	114	208
400	450	-440	-230	-135	-135	-68	-20	0	0	0	0	±20	±31	45	63	80	108	131	166	272
		-540	-327	-198	-232	-131	-60	-27	-40	-63	-97			5	23	40	68	68	126	232
450	500	-480																	172	292
		-635																	132	252
HOUSING TOLERANCE TABLE (ISO)
!	ݣ	B10	C9	D8	E7	E8	F7	G7	H6	H7	H8	JS7	K7	M7	N7	P7	R7	S7	T7
	3	180	85	34	24	28	16	12	6	10	14	5	0	-2	-4	-6	-10	-14	!
		140	60	20	14	14	6	2	0	0	0		-10	-12	-14	-16	-20	-24
3	6	188	100	48	32	38	22	16	8	12	18	6	3	0	-4	-8	-11	-15	!
		140	70	30	20	20	10	4	0	0	0		-9	-12	-16	-20	-23	-27
6	10	208	116	62	40	47	28	20	9	15	22	7	5	0	-4	-9	-13	-17	!
		150	80	40	25	25	13	5	0	0	0		-10	-15	-19	-24	-28	-32
10	14	200	138	77	50	59	34	24	11	18	27	9	6	0	-5	-11	-16	-21	!
14	18	150	95	50	32	32	16	6	0	0	0		-12	-18	-23	-29	-34	-39
18	24	244	162	98	61	73	41	28	13	21	33	10	6	0	-7	-14	-20	-27	!
24	30	160	110	65	40	40	20	7	0	0	0		-15	-21	-28	-35	-41	-48	-33
																			-54
30	40	270	182	119	75	89	50	34	16	25	39	12	7	0	-8	-17	-25	-34	-39
		170	120	80	50	50	25	9	0	0	0		-18	-25	-33	-42	-50	-59	-64
40	50	280	192																-45
		180	130																-70
50	65	310	214	146	90	106	60	40	19	30	46	!15	9	0	-9	-21	-30	-42	-55
		190	140	100	60	60	30	10	0	0	0		-21	-30	-39	-51	-60	-72	-85
65	80	320	224														-32	-48	-64
		200	150														-62	-78	-94
80	100	360	257	174	107	125	71	47	22	35	54	!17	10	0	-10	-24	-38	-58	-78
		220	170	120	72	72	36	12	0	0	0		-25	-35	-45	-59	-73	-93	-113
100	120	380	267														-41	-66	-91
		240	180														-76	-101	-126
120	140	420	300	208	125	148	83	54	25	40	63	!20	12	0	-12	-28	-48	-77	-107
		260	200	145	85	85	43	14	0	0	0		-28	-40	-52	-68	-88	-117	-147
140	160	440	310														-50	-85	-119
		280	210														-90	-125	-159
160	180	470	330														-53	-93	-131
		310	230														-93	-133	-171
180	200	525	355	242	146	172	96	61	29	46	72	!23	13	0	-14	-33	-60	-105	-149
		340	240	170	100	100	50	15	0	0	0		-33	-46	-60	-79	-106	-151	-195
200	225	565	375														-63	-113	-163
		380	260														-109	-159	-209
225	250	605	395														-67	-123	-179
		420	280														-113	-169	-225
250	280	690	430	271	162	191	108	69	32	52	81	!26	16	0	-14	-36	-74	-138	-198
		480	300	190	110	110	56	17	0	0	0		-36	-52	-66	-88	-126	-190	-250
280	315	750	460														-78	-150	-220
		540	330														-130	-202	-272
315	355	830	500	299	182	214	119	75	36	57	89	!28	17	0	-16	-41	-87	-169	-247
		600	360	210	125	125	62	18	0	0	0		-40	-57	-73	-98	-144	-226	-304
355	400	910	540														-93	-187	-273
		680	400														-150	-244	-330
400	450	1010	595	327	198	232	131	83	40	63	97	!31	18	0	-17	-45	-103	-209	-307
		760	440	230	135	135	135	20	0	0	0		-45	-63	-80	-108	-166	-272	-370
450	500	1090	635														-109	-229	-337
		840	480														-172	-292	-400