Cylindrical Roller Bearing, buy NU 1030 M N 230 EM NJ 230 EM NU 230 EM NU 230 MA NUP 230 M NJ 2230 EM NU 2230 EM NUP 2230 M N 330 EM NJ 330 EM NU 330 EM NUP 330 EM NJ 2330 EM NU 2330 EM NUP 2330 M NNU 4930 K M NA NN 3030 K M NA，Cylindrical Roller Bearings on China Suppliers Mobile

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	Principal dimensions			Basic load ratings		Speed limits		Weight	Radius		Dimensions
Part number	Bore	Outer	Width	Dynamic	Static	Grease	Oil	Weight	Radius		Dimensions
	d	D	B	C	Co	rpm		Kg	rs _min	r1s _min	F	E
	mm			kN		1 min−1		Kg	mm		mm
NU 1030 M	150	225	35	190	271	2600	3200	4,83	2,1	1,5	169,5
N 230 EM	150	270	45	386,6	554,8	1900	2400	11,2
NJ 230 EM	150	270	45	422	550	2200	2800	10,6	3	3	182,0
NU 230 EM	150	270	45	422	550	2200	2800	11,68	3	3	182,0
NU 230 MA	150	270	45	370	484	2000	2600	10,3	3	3	182,0
NUP 230 EM	150	270	45	370	484	2000	2600	10,9	3	3	182,0
NJ 2230 EM	150	270	73	573,7	922	1900	2400	18,61
NU 2230 EM	150	270	73	573,7	922	1900	2400	18,25
NUP 2230 M	150	270	73	565	836	1900	2400	19,7	3	3	182,0
N 330 EM	150	320	65	688	921	1700	2000	25,78
NJ 330 EM	150	320	65	688	921	1700	2000	26,32
NU 330 EM	150	320	65	798	988	1700	2000	27	4	4	193,0
NUP 330 EM	150	320	65	667	813	1700	2000	27,4	4	4	193,0
NJ 2330 EM	150	320	108	1055	1607	1700	2000	43,5
NU 2330 EM	150	320	108	1055	1607	1700	2000	42,98
NUP 2330 M	150	320	108	1022	1409	1700	2000	44,7	4	4	193,0
NNU 4930 K M NA	150	210	60	326,0	645	2600	3200	6,460	2,0		168,5
NN 3030 K M NA	150	225	56	339,0	600	2600	3000	7,500	2,1	9,5		206,0

Cylindrical roller bearings are manufactured in a number of designs as indicated below.The predominant

type being the single row roller. The roller and cage assembly are guided axially by the integral

flanges (ribs) on one of the bearing rings. This design facilitates ease of mounting and dismounting,

particularly where both races are an interference fit on their seatings. Roller bearings with flanges (ribs)

on one race only do not provide any end location. Various roller bearings with ribs on both races provide

axial location, and are capable of carrying light or intermittent axial loading. These patterns are of

the NJ, NUP and NJ+HJ types. If used for axial location and light axial loads, the contact between the

flanges (ribs) and the roller ends is that of a sliding bearing, not rolling bearing; therefore

lubrication is of paramount importance.

Alignment is much more critical than that of a ball bearing; as a general guide, this is limited to

approximately .003 radians. Double and multi-row bearings are also manufactured

- see NN and NNU series.

Dimensions in accordance with ISO 15-2011

Of these bearings, the NJ, NUP and NJH types can also carry light or intermittent thrust loads between the guide rib and the end of the rollers. Several arrangements of locating ribs are available, as illustrated. The choice between these types is usually decided by consideration of assembly procedure or machine clearances. The bearings utilizing machined bronze cages are suitable for high speed peration. The NN 30 and NN 30 K series are available in high precision tolerances and, due to their extreme rigidity, are particularly suited for use in machine tool spindles.

Typical suffixs used for cylindrical roller bearings:

E - Increased loading capacity

NA - Non-interchangeable components

M - Brass cage guided on the rollers

EM - Increased loading capacity and brass cage guided on the rollers

EMA - Increased loading capacity and brass cage guided on the outer ring.