NKIS Series

Description

NKIS Series Machined Needle Roller Bearings are heavy-duty radial bearings designed with a machined steel outer ring, needle roller and cage assembly, and an inner ring. Compared with standard NKI Series bearings, the NKS/NKIS Series features a wider inner ring, providing improved axial guidance and making it suitable for applications where the shaft has greater axial movement or where additional support is required.

Features

Precision-machined, high-strength steel outer ring
Hardened and precision-ground extended inner ring
High radial load-carrying capacity
Compact and robust construction
Suitable for high-speed operation
Low friction and smooth running
High rigidity and long service life
Lubrication groove and lubrication hole on many sizes
Easy mounting and maintenance

NKS / NKIS Series Needle Roller Bearing Dimensions

Bearing No.	d (mm)	D (mm)	B (mm)	Cr (N)	Cor (N)	Grease RPM	Oil RPM	Weight (kg)
NKIS 20	20	42	20	28600	39000	13000	15000	0.13
NKIS 25	25	47	22	34100	46500	12000	13000	0.16
NKIS 30	30	52	22	36000	54000	10000	12000	0.18
NKIS 35	35	58	22	39100	61000	9000	10000	0.22
NKIS 40	40	65	22	48000	67000	5300	8900	0.28
NKIS 45	45	72	22	51000	78000	7000	8000	0.34
NKIS 50	50	80	28	62700	104000	6300	7500	0.52
NKIS 55	55	85	28	66000	114000	6000	6700	0.56
NKIS 60	60	90	28	68200	120000	5600	6300	0.61
NKIS 65	65	95	28	70400	132000	5300	6000	0.64
NKIS 70	70	100	28	74800	140000	5000	5600	0.68
NKIS 80	80	110	32	82500	176000	4300	4800	0.95
NKIS 90	90	120	32	87500	198000	3900	4400	1.15
NKIS 100	100	135	32	91300	220000	3600	4000	1.34

Dimension Symbols

d = Bore Diameter
D = Outside Diameter
B = Bearing Width
Cr = Basic Dynamic Load Rating
Cor = Basic Static Load Rating

NKIS Series bearings are heavy-duty machined needle roller bearings with an inner ring. They are designed for high radial loads, heavy-duty industrial applications, gearboxes, construction machinery, mining equipment, textile machinery, and agricultural equipment.