BT40-TER25 BT Elastic Expansion tapping chuck
Material:20CrMnTi
Hardess:HRC52-58
Runout ≤0.003mm
What is a floating tap holder?
A floating tap holder does the same thing. The machine is controlling the Z-axis rigidly, but the tap holder has a float that allows the tap to be pulled in or out at a feed rate that is proportional to the spindle speed and pitch. It allows the tap to move axially independent of the machine's axis.
"BBT" Tool Holder Provides More "Rigid" Clamping than the Standard "BT" Tool Holders. Achieves Higher "Radial Rigidity". Improves Tool Life. Balanced to 2.5G, 25000 RPM.
The difference between CAT and BT is the flange style, thickness, and size of the pull stud thread. BT tool holders use metric thread pull studs (retention knobs).