Provides reference guidelines for various bearing numbering systems
This guide explains NTN's bearing numbering system for different types including micro, radial, angular contact, and self-aligning ball bearings. It details prefixes, series, bore sizes, seals, clearances, precision classes, and lubricants. The guide also covers special features like heat stabilization, ceramic elements, and preload options for specific bearing applications.
It is designed to help users decode NTN bearing part numbers and select the correct bearing for their needs based on technical specifications and industry standards.
| Prefix | F: Martensitic stainless steel (equivalent to AISI 440C) |
|---|---|
| Series | 67, 68: Metric Series |
| Cage | T2: Nylon cage |
| Seal or Shield | ZZ: Steel shield(s) |
| Internal Clearance | C4: Clearance greater than C3 |
| Precision | P5: ISO class 5 (equivalent to ABEC 5) |
| Lubricant | 1K: Kyodo Yushi Multemp PS No. 2 |
F indicates Martensitic stainless steel (equivalent to AISI 440C).
C4 indicates clearance greater than C3.
P5 indicates ISO class 5, equivalent to ABEC 5.
1K indicates Kyodo Yushi Multemp PS No. 2.