FafnirFPN12PHBearing Lock Nut – FPN Series, Size 12, PH Execution, Steel

Product Description

What this part is

Fafnir FPN12PH bearing lock nut. Series: FPN. Base Number: FPN12. Part Number: FPN12PH. Bearing Material: Steel. Design Units: Imperial. A lock nut is the threaded retaining component that clamps a bearing inner ring against a shaft shoulder, or that draws a tapered adapter sleeve up into a tapered bore.

Decoding the designation

FPN — the Fafnir bearing lock nut series.

12 — the size code within that series.

What these specs mean in practice

The nut screws onto the threaded portion of a shaft or an adapter sleeve and sets the axial position of the bearing inner ring. Where the nut is used on a tapered adapter sleeve, the amount it is driven up the taper also sets the radial internal clearance of the bearing, so it is a setting component as much as a retaining one.

Bearing Material: Steel. A steel lock nut carries the full clamping preload without creep.

Quantity and configuration

Unit Quantity: 1 Pc. Lock nut only.

Interchange guidance

No cross-references are published for this number. A lock nut interchanges on its thread designation and seat geometry rather than on a bearing size, so an equivalent has to be matched by measuring the thread. Search on the FPN12PH, FPN-12-PH and FPN 12 PH forms of the number.