NPFC - MS 52143
BEARING, ROLLER, NEEDLE: THICK OUTER RING W/ROLLERS, CAGE AND SEALS
| Organization: | NPFC |
| Publication Date: | 30 April 1980 |
| Status: | active |
| Page Count: | 2 |
scope:
This military standard is approved for use by all Departments and Agencies of the Department of Defense. Selection for all new engineering and design applications and for repetitive use shall be made from this document when applicable.
MATERIAL:
A. RING - STEEL, ALLOY OR CARBON, CARBURIZING GRADE, 4620, 4720, 8620, OR 1010-1020 SAE 51100 OR SAE 52100 PER FED-STD-66 OR SAE J-404.
B. ROLLERS - STEEL, ALLOY, E50100, E51100 OR E52100 PER FED-STD-66 OR SAE J-404.
C. CAGE - STEEL, BRASS, BRONZE OR ACCORDING TO CURRENT MANUFACTURER'S STANDARD.
D. SEALS - LOW CARBON STEEL AND BUNA-N RUBBER.
HEAT TREATMENT:
A. RING - STEEL, 4620, 4720, 8620, 8720, OR 1010-1020, CASE HARDENED TO RC 58-65. CASE DEPTH .025 MIN. STEEL, SAE 51100 OR SAE 52100, THROUGH HARDENED TO RC 58-65.
B. ROLLERS - THROUGH HARDENED TO RC 58-65.
SURFACE FINISH - SURFACES MARKED AND SHALL HAVE MAXIMUM SURFACE ROUGHNESS IN ACCORDANCE WITH ANSI B46.1.
PROTECTIVE COATING - UNLESS OTHERWISE SPECIFIED, PLAIN (NOT PLATED) BEARINGS TO BE COATED WITH RUST PREVENTIVE FILM BY MANUFACTURER.
LUBRICATION - BEARINGS SHALL BE FURNISHED WITHOUT LUBRICATION.
Document History
