Cnc 3-4mm Collet For Er40 Nut Dimar N615060

3-4mm (1/8") d, ER40 Precision Collet, 41mm Dia, 46mm Length

Dimar's Collets are purposefully manufactured from softer metal than the tool holder, this will ensure a tight grip on the cutting tool. 

Be sure to replace your collet, 

• If a tool is broken off while in the collet and it has scored or marked the inside or outside of the collet in any way. 
• If noticeable marking is evident on the cutting tool shank, which is called as "fretting". This happens when two steel parts rub against each other. 
• If small visible copper or dark-colored pits or marks start appearing on the collet this is evidence that the tool is becoming worn out.