standard

1 1/8 Inch Drill Bit Standard

This page provides standardized, specification-oriented reference information.

Specifications

Specification	Value
Diameter	1 1/8 inch (1.1250 in)
Common Uses	Oversize holes in wood with auger/spade/Forstner/hole saw systems; verify tool torque and chuck capacity
Shank	Often reduced shank or hex; verify chuck capacity

As an Amazon Associate, Baseline earns from qualifying purchases. Full disclosure.

Last updated: February 23, 2026