Couple of different collet Chucks, one speed chuck and the other lever action. Both used on my Sheldon 10″ EXL.
Ortlieb Lever Collet Closer
Ortlieb Lever Collet Chuck Steel Collets List of Rubberflex Collets Type 30 Mount Hardware for Sheldon EXL 2 1/4 x 8 Threaded Spindle Closer and Collets Collet in good shape Two Collets worn but each of them have a corresponding good one. Hole for spanner wrench bad but usable. Suggest drilling a new one.
Jacobs Model 50
Jacobs Model 50 Jacobs Model 50 Closer look 2 1/4-8 threaded spindle Couple of small nicks Nick 1 Nick 2 Extra Collets above and beyond full set 2 1/4-8 Spindle