Bearing Design

Standard cylindrical roller bearings feature a tapered bore (taper 1:12) for precise adjustment of the radial clearance. Thus the desired radial clearance or radial preload can be adjusted by axial displacement on the tapered shaft. Hybrid cylindrical roller bearings with rollers from ceramic material have been newly included in the product range.

Thanks to the use of ceramic rollers, they offer significantly improved characteristics in terms of bearing friction and wear.

 

This reduces the demand on the lubricant and leads to lower temperatures.

Consequently, higher speeds are permissible and the service life is extended to a significant degree. Furthermore, ceramic

rollers lead to increased static and dynamic rigidity and their lower thermal expansion coefficient defuses an increase in preload at elevated temperatures.

 

In the case of oil lubrication, attention has to be paid to their lower oil requirement in comparison with angular contact ball bearings.

The oil circuits have to be kept separate if these two bearing types are mounted side by side. Excess lubrication due to oil flow from the angular contact ball bearings has to be avoided as a sharp increase in bearing temperatures is to be expectedotherwise.

 

 

The bearings comprise solid outer rings without ribs, solid inner rings with three ribs and cylindrical roller and cage assemblies with solid brass cages. For optimum setting of the radial internal clearance, the inner ring has a tapered bore with a taper of 1:12. The cylindrical roller bearings can be dismantled and are therefore easier to fit and remove. Both bearing rings can therefore have an interference fit.

 

super precision cylindrical roller bearings are characterized by:

 

high speed capability

 

high radial load carrying capacity

 

high rigidity

 

low friction

 

low cross-sectional height

 

 

Bearings	Demensions					MountingDimension			Load		RPM		stiffness	Weight
	d	D	B	Rsmin	E	da	Da	Ra	Cr	Cor	Oil	Lub.	Rr	≈
	mm					min	max	max	KN		r/min		N/μm	Kg
N1006	30	55	13	1	49	33.5	49	0.6	18.6	18	19000	22000	0.3	0.13
N1007	35	62	14	1	55	38.8	56	0.6	23.6	24.5	16000	18000	0.4	0.17
N1008	40	68	15	1	61	43.5	62	0.6	27.5	29	15000	17000	0.4	0.22
N1009	45	80	16	1	68	48.5	69	0.6	32.5	35.5	13000	15000	0.5	0.27
N1010	50	80	16	1	73	53.5	74	0.6	36	41.5	12000	14000	0.5	0.29
N1011	55	90	18	1.1	81	61	82	1	41.5	50	11000	13000	0.6	0.44
N1012	60	95	18	1.1	86	66	87	0	44	55	10000	12000	0.7	0.47
N1013	65	100	18	1.1	91	71	92	1	45	58.5	9500	11000	0.7	0.49
N1014	70	110	20	1.1	100	76	120	1	64	81	9000	10000	0.8	0.69
N1015	75	115	20	1.1	105	81	107	1	65.5	85	8500	9500	0.8	0.72
N1016	80	125	22	1.1	114	86	115	1	76.5	98	7500	8500	0.9	0.98
N1017	85	130	22	1.1	119	91	120	1	78	104	7500	8500	0.9	1.04
N1018	90	140	24	1.5	127	97	129	1	93	125	6700	7500	1	1.34
N1019	95	145	24	1.5	132	102	134	1	96.5	129	6300	7000	1	1.4
N1020	100	150	24	1.5	137	107	139	1	98	134	6000	6700	1.1	1.46
N1021	105	160	26	2	146	114	148	1	112	153	6500	6300	1.1	1.82
N1022	110	170	28	2	155	118	157	1	140	190	4800	6000	1.2	2.3
N1024	120	180	28	2	165	129	167	1	150	208	4800	5600	1.3	2.47
N1026	130	200	33	2	182	139	184	1	180	250	4300	4800	1.4	3.72
N1028	140	210	33	2	192	149	194	1	183	265	4000	4500	1.4	3.94
N1030	150	225	33	2.1	206	160.5	208	1.5	208	310	3800	4300	1.6	4.75
N1032	160	240	33	2.1	220	170.5	222	1.5	245	355	3400	3800	1.6	5.79
N1034	170	260	33	2.1	237	180.5	239	2.1	300	430	3200	3600	1.8	7.77
N1036	180	280	33	2.1	255	190.5	258	2.1	360	520	3000	3400	1.9	10.2
N1038	190	290	33	2.1	265	200.5	268	2.1	365	550	2800	3200	2	10.6
N1040	200	310	33	2.1	281	210.5	285	2.1	400	600	2600	3000	2.1	14
N1044	220	340	33	3	310	232.5	313	2.5	510	765	2400	2800	2.3	17.9
N1048	240	360	33	3	330	252.5	334	2.5	540	850	2200	2600	2.5	19.3
N1052	260	400	33	4	364	275	368	3	655	1020	1900	2200	2.7	28.6
N1056	280	420	33	4	384	295	388	3	680	1100	1800	2000	2.9	30.9