Engineering guide

Catalog-led selection for serious rolling mill bearings.

The Stanley PDF guide covers type and code, dimension selection including bearing life calculation, speed ratings, precision and tolerance, internal clearance and preload, materials and fits.

Guide pages 1-97

Seven technical areas before final bearing selection.

1. Type and code of rolling mill bearingsIdentify bearing role, family, prefix code, type code, dimension code, bore diameter code and suffix code.

2. Selection of rolling mill bearing dimensionDimension selection includes calculation of bearing life and application suitability.

3. Speed ratings of rolling mill bearingsSpeed limits must be reviewed against the mill duty and selected bearing type.

4. Precision and toleranceCatalog tolerance classes include /P0, /P6, /P6X, /P5, /P4, /P2, /SP and /UP references.

5. Internal clearance and preloadClearance groups such as /C1, /C2, /C3, /C4, /C5 and /CN affect replacement choice.

6. Materials and requirementsVariant material suffixes include bearing steel, remelting steel, stainless variants, carburized steel and special materials.

7. Fits for rolling mill bearingsFits must be selected against shaft, housing, load direction and washer conditions.

Technical decision flow

Use this flow before procurement or replacement. It mirrors the catalog’s logic in a website-friendly sequence.

01Identify application role

02Confirm bearing type and code

03Check dimensions and load ratings

04Confirm clearance, tolerance and fit

Need code help?

Open the bearing code popup or the full catalog page before comparing an old bearing with a Stanley reference.

Tolerance classes

The catalog lists tolerance class codes including /P0, /P6, /P6X, /P5, /P4, /P2, /SP and /UP. These codes must be preserved when the operating position requires precision.

Clearance groups

Clearance groups include /C1, /C2, basic group 0, /C3, /C4, /C5, /CN and /C9. Catalog notes warn that combined tolerance and clearance codes may be written together.

Fits and materials

Selection must include more than dimensions.

The catalog includes material suffixes and fit tables because a dimensionally similar bearing may still fail if material, clearance, tolerance or fit is wrong for the rolling mill condition.

Area	Examples from catalog
Variant material	/HE, /HA, /HU, /HV, /HN, /HC, /HP, /HQ, /HG
Configuration	D, T, Q, P, S, B, F, BT, FT, DB, DF, DT
Fits	Shaft washer and housing washer fit guidance is included for thrust bearings.