INDUSTRIES

Integrated supplier

产品描述

TECHNICAL FEATURES

Radial needle roller and cage assemblies have a steel cage that provides both inward and outward retention for the needle rollers. 

The designs provide maximum cage strength consistent with the inherent high loadratings of needle roller bearings.

Accurate guidance of the needle rollers by the cage bars allows for operation at high speeds. Needle roller and cage assemblies have either one or two rows of needle rollers. 

Also listed are needle roller and cage assemblies using molded, one-piece glass-reinforced engineered polymer cages (suffix TN). 

These operate well at temperatures up to 120° C over extended periods. However, care should be exercised when these assemblies are lubricated with oils containing additives as service life may be reduced if the operating temperature exceeds 100° C. At such high temperatures oil can deteriorate with time and it is suggested that oil change intervals are observed.

Needle rollers with relieved ends used in these assemblies are made of high-carbon chrome steel, through-hardened, ground and lapped to close tolerances for diameter and roundness.

Reference standards are:

• ISO 3030 - needle roller bearings - radial needle roller and cage assemblies - boundary dimensions and tolerances.

• DIN 5405 Section 1 - rolling bearings - needle roller bearings - radial needle roller and cage assemblies.

• ANSI/ABMA 18.1- needle roller bearings – radial,metric design.

DIMENSIONAL ACCURACY

Needle roller groups

Radial needle roller and cage assemblies are supplied with needle roller complements subdivided into groups.

The groups are decided by Nadella if not differently decided during the order and with Grade G2 specified in ISO 3096 standard (see needle rollers, page 195).

The needle roller and cage assemblies of one shipment usually contain needle rollers with group limits of between 0 … to -2, and -5 … -7 μm. For needle roller and cage assemblies with needle rollers of different group limits contact Technical Service Nadella.

TYPES OF RADIAL NEEDLE ROLLER AND CAGE ASSEMLIES

SUFFIXES

SINGLE-ROW, DOUBLE-ROW ASSEMBLIES K7x10x10TN