Lenox 3390012LS Lead Screw Self-feed Drill Bit Replacement 5 Pack

Product Description

The LENOX 3390012LS is a carbon steel lead screw replacement part designed for use with self-feed drill bits. The lead screw is the pointed, threaded tip that pulls the bit through wood and guides the cutting head into the material. When the lead screw on a self-feed bit becomes worn, damaged, or stripped, replacing it restores full cutting performance without requiring a completely new bit. This part is sold in a pack of 5, making it a practical stock item for electricians, plumbers, and other trades that rely on self-feed bits for boring through framing and joists.

Self-feed bits are standard tools in rough-in work across residential and light commercial construction. They are used to drill large-diameter holes through wood studs, plates, and joists for routing pipe, conduit, and cable. The LENOX 3390012LS lead screw is compatible with LENOX self-feed bit models in the LL100 through LL256 range. Keeping replacement lead screws on hand reduces downtime when a bit tip fails mid-job, particularly on high-volume installations where bits see heavy daily use.

Key Features

• Carbon steel construction for durability in wood-boring applications
• Threaded lead screw design pulls the bit through material and centers the cut
• Replaces worn or damaged tips on self-feed bits without replacing the full bit
• Compatible with LENOX self-feed bit models LL100 through LL256
• Sold in a pack of 5 for job-site convenience and parts inventory

Compatibility

Compatible with LENOX self-feed drill bits in the LL100 through LL256 range as stated by the manufacturer. Confirm the specific self-feed bit model before installation to ensure correct thread pitch and screw diameter.

Installation Notes

Lead screw replacement on self-feed bits is performed by trades including electricians, plumbers, and carpenters who use these bits in wood-framing applications. Before replacing the lead screw, ensure the drill is unplugged or the battery pack is removed. Use the appropriate wrench or bit tool to remove the worn screw and thread in the replacement, securing it firmly before returning the bit to service. Do not overtighten in a way that damages the bit body threads.