Pinion Return Spring for 14 and some 15 inch Drill Presses with the DP-220 Head Casting. These springs are just under 2 inches in diameter. The springs for the 14 inch Drill Presses that take the DP-225 Head Casting and some 15 inch Drill Presses take a 2.375 O.D. spring # 402-04-320-5001.