1/2″ Shank Knee Feed Adapter for Power Drill – Bridgeport Mill Drill Feed Tool

Description Product Overview The 1/2″ shank knee feed adapter is a simple and effective tool designed to convert a standard power drill into a knee feed drive for milling machines. It allows operators to raise and lower the knee quickly and easily without manual cranking. This adapter is ideal for Bridgeport and Bridgeport-style mills and provides a low-cost alternative to installing a dedicated power feed system. Applications Bridgeport and clone milling machines Manual mills without power feeds Shop maintenance and setup work Quick positioning of the knee �� These adapters are commonly used as an inexpensive way to automate knee movement Key Features Works with standard 1/2″ power drills Fits 9-spline shafts (.630″ ID) Compatible with most mills using 5/8″ hubs Converts manual knee crank into powered movement Heavy-duty hardened steel construction Flats on shank for secure drill grip Compact and easy to use Why This Tool Matters Manually raising and lowering the knee: Is slow and physically tiring Takes time during setups Reduces efficiency This adapter: Saves time during setup Reduces operator fatigue Speeds up positioning �� It’s one of the easiest upgrades you can make to a manual mill. When to Use This Adapter When you don’t have a Z-axis power feed When doing frequent height adjustments During setup and positioning For occasional or budget-friendly upgrades ⚠️ Fitment Note Designed for 9-spline shafts (.630″ ID) May require minor machining for some mills Not universal—always verify compatibility Specifications Shank Size: 1/2″ Bore: .630″ (9 spline) Material: Hardened steel Compatibility: Bridgeport-style mills Function: Drill-powered knee feed �� Need Help Confirming Fitment? Not sure if this will fit your mill or spline size? �� Call us or request a quote—we’ll help you confirm compatibility before you order.