Lenox 33125LL125 Self Feed Drill Bit 1-1/4 in Hex Shank

Product Description

The LENOX 33125LL125 is a self feed drill bit designed for fast, clean boring through wood framing, engineered lumber, and similar materials encountered in plumbing, HVAC, and electrical rough-in work. It cuts a 1-1/4 inch diameter hole and features a 7/16 inch hex shank for positive engagement in impact-rated drill chucks and bit holders. The bright finish steel construction keeps weight low at 0.4 pounds. Overall length is 5-1/2 inches, giving enough reach for standard framing depths. The bit is suited for trade professionals who need repeatable, accurate holes for pipe and conduit routing.

This bit is sized for common trade rough-in applications. The 5-1/2 inch overall length accommodates typical single-stud boring. The bore geometry provides a 3/4 inch entrance for pipe and rigid conduit and a 1-1/8 inch entrance for tubing, making it practical for plumbers, pipefitters, and HVAC installers working with copper tubing or rigid conduit. It is sold and packaged as a single bit.

Key Features

• 1-1/4 inch cutting diameter for standard pipe and conduit rough-in holes
• 7/16 inch hex shank engages securely in impact-rated drill chucks and quick-change holders
• 5-1/2 inch overall length suits single-stud and shallow framing applications
• 3/4 inch entrance for pipe and rigid conduit; 1-1/8 inch entrance for tubing
• Bright finish steel construction

Compatibility

Designed as a replacement or supplemental self feed drill bit for use with any drill or driver accepting a 7/16 inch hex shank; no extension capability is specified for this bit.

Installation Notes

A licensed electrician, plumber, or HVAC technician typically installs this bit as part of structural rough-in drilling. Ensure the drill is powered off and the bit is fully seated in the chuck before operation. Follow applicable codes such as NEC or IPC for minimum clearances around bored holes in structural members. Inspect the bit for wear or damage before each use and replace if the center point or cutting spurs are dull or chipped.