Grease Fittings

To maximize bearing life, be sure you relubricate (hyperlink to Relubrication page) units with a NLGI #2-compatible grease (hyperlink to Grease Types page) at intervals recommended for your application. Apply lubricant through the unit’s grease fitting. Fitting threads are based on shaft size:

Shaft Size Grease Fitting Thread
Up to 1-7/16 in 1/4 - 28 UNF
1-1/2 in & over1/8 - 27 NPT

ABT offers three types of fittings. A type (straight) is standard on relubricatable pillow blocks, flanges and take up units. B type (45°) and C type (90°) can be purchased separately or ordered with the units.

Grease fitting dimensions and designations of applicable bearing units include:

Grease Fitting Type d H (mm) S (mm)
A Type (straight)M6X18.57
 1/4-28 UNF8.57
 1/8-27 NPT 9.511
B Type (45°)M6X11510
 1/4-28 UNF1510
 1/8-27 NPT1510
C Type (90°)M6X11510
 1/4-28 UNF1510
 1/8-27 NPT14.510