Hardinge Tool Holders, Toolholder Collets and Bushings Catalog ...

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Overview: Tap Collets and Holders
TT Floating—page 33
TT Holder—page 33
GK Holder—page 34
Hardinge ® TT Floating Tap Holder Collets
TT Tap Holder Collets are used exclusively in the Hardinge TT Tap Holders – 5 ⁄8" and
3 ⁄4" round shanks. Each collet is made for a specific tap size. A square broached hole
securely holds the shank of the tap, eliminating tap slippage and misalignment.
TT- 5 ⁄8 & - 3 ⁄4 Collet-Type Releasing Tap Holder
The Collet-Type Releasing Tap Holder is used to provide thread length control on
either right- or left-hand taps by switching a lever inside the body of the tap holder.
The tap holder mounts directly into a round shank tool holder. TT-style tap holder
collets are used for accurate holding and centering of taps. To provide a positive
drive for the taps, the collets have a square slot in the back to accommodate the
square on the tap shank and a notch in the back bearing of the collet that fits over
a hardened pin in the bottom of the holder.
GK Self-Feeding, Length-Control Tap Holder
The Self-Feeding (Pafix) Tap Holder provides automatic thread length control. The
tap holder eliminates the need to match feed rate to thread pitch, minimizing tool
breakage. The holder has a 5 ⁄8" shank diameter. Thread length is controlled internally
with an adjusting ring in .01" (.25 mm) increments. A driver is used in the holder to
accommodate the square of the tap shank, providing a positive drive. A collet is used
to centralize and hold the tap in the holder.
"Cool Stop" Coolant Seals
Maximize coolant flow through your drills with
the "Cool Stop" system. "Cool Stop" Seals are
designed to seal around the shank of the drill
and ID of the ER and TG holders. The gauge
length of the holder does not change. The
collet stays flush with the cap because the "Cool
Stop" seal locates at the back of the collet.
Each "Cool Stop" has a range from rated size
down to .020" (5.0 mm), resulting in a
small seal inventory for each collet style.
You can keep the coolant running through
the drill (rather than out the collet)
at pressures up to 1500 psi.
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