The specification of IKO roller followers are indicated by the identification number. The identification number consist of a model code, dimensions, material, roller guide method, seal for each specification.
| Mode code | Size | Type of material | Roller guide method | Seal structure | Shape of outer ring | Model code |
|---|---|---|---|---|---|---|
| NAST | 10 | ZZUU | R | |||
| NART | 10 | V | UU | R | ||
| NART | 15 | UU | R | /SG | ||
| NART | 12 | F | UU | R |
Mode code
For metric series:
- RNAST: Separable Roller Follower, without inner ring
- NAST: Separable Roller Follower, with inner ring
- NART: Non-separable Roller Follower
- NART.../SG: C-Lube Roller Follower
- NURT: Cylindrical Roller Follower
For inch series:
- CRY: Non-separable Roller Follower
Size
The size indicates the bore diameter of the inner ring. (unit: mm)
In the inch series, the outer diameter of the outer ring is indicated in units of 1/16 inch.
Type of material
- No symbol: High carbon steel made
- F: Stainless steel made (Applicable to Non-separable roller followers only)
Roller guide method
- No symbol: With cage
- V: Full complement type
Seal structure
For separable roller follower
- No symbol: Open type
- ZZ: Shield type
- ZZUU: Sealed type
For other IKO roller followers
- No symbol: Shield type
- UU: Sealed type
Shape of outer ring outside surface
- No symbol: With cylindrical outer ring
- R: With crowned outer ring