15Pc Cat40 Pull Stud Retention Knob For Any Cat40 CNC Spindle With Coolant Through Hole, Heavy Duty Steel Black Finish, Beefed Up Durability, Reduces Distortion, Extends Part Life, Precision Milling Accessory

15-Piece CAT40 Pull Stud Retention Knobs with Coolant Hole
✔️ Heavy-duty steel, black finish, coolant hole, 15pc set

These retention knobs are designed to fit CAT40 CNC spindles and are commonly used on vertical milling machines to securely hold tool holders, especially in through-coolant setups. This 15-piece set provides durable, high-strength components that resist distortion and extend part life in demanding milling operations.

✅ Compatible with CAT40 spindles
✅ Through-hole coolant design for efficient coolant delivery
✅ Heavy-duty steel with a black finish for durability
✅ Reduces distortion and extends tool life in high-load milling

💡 What is a CAT40 pull stud retention knob used for?

It locks tool holders to the spindle nose, helping maintain accuracy during milling.

- Secures tool holders on CAT40 spindles to prevent slipping - Enables coolant-through setups for efficient cooling - Extends tool life by reducing distortion and chatter