INARASE2-7/16HLCPillow Block Unit – 2.4375 in Bore, 2 Bolt, Cast Iron, Eccentric Locking Collar, Non-Expanding.

Product Description

What this part is

INA RASE2-7/16HLC mounted ball bearing unit for a 2-7/16 in shaft. Cast iron two-bolt pillow block housing with a self-aligning wide inner ring insert, rubber seals on both sides, eccentric locking collar, non-expanding.

Housing style and bolt pattern

Pillow block — a base-mounted block that bolts down to a horizontal surface through two holes, with the shaft running parallel to the mounting face. Two fasteners. Housing material is cast iron.

Decoding the designation

RASE is the INA pillow block series with an eccentric locking collar. 2-7/16 is the shaft size in inches, giving a 2.4375 in (61.91 mm) bore in the insert.

What these specs mean in practice

Load ratings are 52.5 kN (11800 lbf) dynamic and 35.9 kN (8080 lbf) static, with a limiting speed of 2470 rpm. The spherical outer surface of the insert seats in a matching spherical housing bore, so the unit takes up initial shaft misalignment on assembly. Non-expanding means the insert is axially fixed in the housing, so this position locates the shaft; a second bearing on the same shaft carries the thermal growth. Working range −20 °C to 100 °C.

Locking and relubrication

An eccentric locking collar grips the shaft by an offset cam action driven by shaft rotation, which holds better under one-directional rotation than a plain setscrew and leaves no shaft marking of the kind a hardened setscrew tip makes. A grease fitting is provided, so the unit can be relubricated in service.

Quantity and configuration

1 Pc. Complete unit — housing, insert bearing and locking collar assembled.

Fitting notes

The block is bolted down first and the shaft passed through, then the collar is set in the direction of rotation so the cam tightens rather than releases. Seating the insert in the spherical housing bore lets the unit align itself to the shaft before the base bolts are pulled up fully.