Value Collection 429-3903 Lathe Chuck Adapter Back Plate

Product Description

The VALUE COLLECTION 429-3903 is a lathe chuck adapter back plate designed to mount an 8-inch self-centering chuck to a lathe spindle using the D1-4 cam-lock nose configuration. The back plate serves as the mechanical interface between the lathe spindle and the chuck body, providing the precise seating surface and registration needed for repeatable, concentric chuck mounting. At 12.5 pounds, this is a substantial cast component suited for production and job-shop environments where rigid toolholding and accurate chuck seating are critical. Machinists, tool-and-die technicians, and maintenance tradespeople working with engine lathes or CNC turning centers are the typical end users for this type of adapter.

This back plate is intended for use with 8-inch self-centering chucks mounted on lathes equipped with a D1-4 Series D spindle nose. The D1-4 cam-lock system is common on mid-size engine lathes and turning centers found in machine shops, maintenance facilities, and vocational training environments. The back plate may require finish-boring to the specific chuck or spindle fit before installation, which is standard practice when fitting adapter plates in precision turning applications.

Key Features

• Fits 8-inch self-centering chucks with a chuck diameter compatibility of 8.0000 inches
• D1-4 cam-lock mount matches standard D Series spindle nose configurations
• Substantial 12.5-pound construction supports rigid chuck seating under cutting loads
• Compatible with Series D spindle nose type for broad lathe fitment
• UNSPSC Code 31162907 for procurement and catalog classification

Compatibility

Designed for use with 8-inch self-centering chucks on lathes equipped with a D1-4 Series D cam-lock spindle nose.

Installation Notes

Installation should be performed by a qualified machinist familiar with lathe spindle nose fitment procedures. Power down and lock out the lathe before mounting or removing any chuck or adapter plate. The back plate typically requires finish-boring on the lathe to achieve proper fit to the specific chuck and spindle combination before final assembly. Verify cam-lock stud engagement and seating torque per the lathe manufacturer's spindle nose specifications.