محول، مغزل 4" إلى فوهة مخرطة 5" (بدون ثقب)

Cutting the threads on the unfinished side was straightforward, and it fit perfectly on my 4" spindle. This saved me a lot of time versus making one from scratch.

Took a chance on this semi-machined adapter, and it was exactly what I needed to mount a 5-inch chuck on my lathe. The unfinished chuck-mount side required a bit of clean-up, but after that, it ran perfectly true.

The flange side fits my lathe spindle perfectly with zero play, so mounting was straightforward. I spent an afternoon truing up the chuck-mounting face on the lathe itself, and now my 5-inch chuck runs dead true. Just remember it's semi-machined, so you'll need to finish that side yourself.