Chasing: 3-3/4" Acme Tap with a FlexArm Tapping Machine

We used a FlexArm GH-60 hydraulic tapping machine for a chasing application using a 3-3/4" Acme Thread. Cuts like butter - smooth as silk! We used an inverter power pack, which allowed for a slow feed down (50-60rpm) and a fast retract. Check out Flex Arm's website at for more tapping and assembly solutions.