M Series Alcohol & Nitro Main Thrust Bearing #3 STD
Suit 426 Hemi, Tray Of 9 Lower Shells

M-Series Bearings

Clevite "Micro" bearings make up the M series. These are special purpose bearings having a nominal .006" thick babbitt lining on a hardened steel back. M series rod bearings have been slightly narrowed at one end to provide extra fillet clearance without the need of a large chamfer. The lower rod shells have a dowel hole for use in aluminium rods with dowel pins. M series mains have enlarged chamfers and, for certain applications, oil holes and oil grooves have also been enlarged.

Use M series parts to take advantage of the high degree of conformability offered by the babbitt lining. These parts are intended mainly for engines where severe crankshaft deflections cause edge loading of the bearings. Under these operating conditions bearing service life will be very short.

Frequent inspections are recommended and bearings should be replaced at the first signs of distress.