MartinSF 2-13/16QD Bushing – SF Size, 2-13/16 in Bore, Ductile Iron, 3/4 x 1/16 in Keyway

Product Description

What this part is:

The Martin SF 2-13/16 is a standard QD (quick detachable) bushing in the SF size with a 2-13/16 in finished bore. It mounts QD-bored sheaves, sprockets and pulleys to a shaft with three cap screws through a split, flanged barrel.

Decoding the designation:

SF — Martin QD bushing size SF.

2-13/16 — finished bore 2-13/16 in.

Specifications:

Bushing Type: QD, standard. Bore Diameter: 2-13/16 in. Material: Ductile iron. Barrel Diameter: 3-1/8 in. Flange Diameter: 4-5/8 in. Flange Thickness: 9/16 in. Overall Length: 2-1/16 in. Bolt Circle Diameter: 3-7/8 in. Number of Bolt Holes: 3. Cap Screws: 3/8-16 x 2 in. Keyway: 3/4 x 1/16 in. Torque Rating: 11,000 in-lb.

Compatibility and replacement:

Replaces Martin SF 2-13/16. Fits any SF QD-bored sheave, sprocket or pulley. The steel version is Martin SF-STL 2-13/16.

Frequently asked questions:

What size keyway does the Martin SF 2-13/16 have?

A 3/4 x 1/16 in keyway, the shallow key used on bores at the upper end of the SF range.

What is the torque rating of the SF 2-13/16 bushing?

11,000 in-lb.

What cap screws does the SF bushing use?

Three 3/8-16 x 2 in cap screws on a 3-7/8 in bolt circle.