CAT 50 Standard Retention Knobs CAT 40 Adapter but it can be tightened

but it can be tightened to a smaller size

providing optimal radial repetitive accuracy to your CNC machining center's tool-spindle

We have diameter sizes of 1” and 1- ¼” to ensure a precise fit on standard arbor style cutters and spacers

Our ER25 rigid tap collets are for use with tap sizes ranging from #0 to ⁵⁄₈”

50 standards and precision ground to meet AT-3 tolerance

CAT 50 Standard Retention Knobs CAT 40 Adapter but it can be tightenedRetention knobs, also known as pull studs, allows you to mount a tool holder to the machine spindle. Using a low quality retention knob can lead to poor tool life and run out, which is all of our retention knobs have threads that are rolled for strength and durability. We have standard style knobs for most machines in stock, as well as coolant thru and many special designs available and able to be shipped out same day. We are also able to manufacture