Chuck Adapter, Unthreaded 6" Diameter

Cast iron's got some real heft to it, which is exactly what I wanted for stability. That 3/8" pilot hole was spot-on for my setup, and threading it to my spindle nose was a straightforward job with the right tap.

Was a bit nervous about the unthreaded design, but the cast iron is hefty and the 3/8" pilot hole gave me a solid starting point for my own threading job. Took a little setup time, but now it's rock-solid on my 6" lathe and spins true.

The cast iron body is heavy and feels solid, and the 3/8" smooth pilot hole made centering straightforward on my lathe. Took a few minutes to clean off some shipping oil, but once threaded for my spindle, it’s been running true with no wobble. Exactly what I needed to mount a 5-inch chuck.