RNU Series

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Introduction

Cylindrical roller bearings have a large load capacity and mainly bear radial loads. Its structure is simple, including cylindrical rolling elements, inner rings, outer rings, and retainers. Single-row cylindrical roller bearings are the most basic type. Its different structures are reflected in the different designs of the ribs. Common basic cylindrical roller bearing types include N NU, NJ NF, and NUP.

The following chart is a simple summary of the comparison of the different rib types for cylindrical roller bearings.

Type	Inner Ring	Outer Ring	Axial Displacement	Axial Load
N	Double Rib	No Rib	Large	None
NU	No Rib	Double Rib	Large	None
NJ	Double Rib	Single Rib	Limited	Small One-Way
NF	Double Rib	Single Rib	Poor	Large One-Way
NUP	Single Rib + Loose Ring	Double Rib	Restricted	Two-Way

Inquiry	Designation	Principal Dimensions(mm)			Basic Load Ratings(KN)		Limited Speed(rpm)		Weight
Inquiry	Designation	Fw	D	B	Dynamic(Cr)	Static(Cor)	Grease	Oil	(kg)
	RNU309E	58.5	100	25	93	98	5600	7000	0.79
	RNU310E	65	110	27	105	112	5300	6700	1.01
	RNU311E	70.5	120	29	128	138	4800	6000	1.5
	RNU308E	53.5	90	23	76.8	77.8	6300	8000	0.48
	RNU307E	46.2	80	21	62	63.2	7000	9000	0.4
	RNU306E	42	72	19	49.2	48.2	8000	10000	0.32
	RNU218E	107	160	30	172	215	3400	4300	2.07
	RNU305E	35	62	17	38.5	35.8	9000	12000	0.2
	RNU214E	84.5	125	24	112	135	4300	5300	0.89
	RNU210E	60.4	90	20	61.2	68.2	6000	7500	0.43
	RNU212E	73	110	22	89.8	102	5000	6300	0.78
	RNU209E	55	85	19	58.5	63.8	6300	8000	0.41
	RNU208E	50	80	18	51.5	53	7000	9000	0.25