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End Mill Holder, Tormach TTS, 3/8" 

End Mill Holder, Tormach TTS, 3/8"
  • Quick change adapter for 3/8" shank end mills
  • Minimal clearance height for tool change
  • Repeatable tool positioning
  • Hardened and precision ground
Part Number: 2434
Weight: 0.65 lb

Price: $30.95

In stock
Quantity:
Quick change Tormach 3/8" suitable for general milling operations and are intended to be used with end mills that have a Weldon shank (flat surface on shank). They can also be used with certain Silver & Deming style drill bits.

The tool holder has a set screw on one side and a balancing dimple on the other side. The balancing dimple reduces vibrations at speeds above 8000 RPM.

See Chris' Tips regarding centering of end mills when using a set screw holder.

Chris Chris' Tips
Verify that the set screw is on the flat of the shank. Never attempt to hold tooling without the screw securly held to the shank.

Due to the set screw, set screw holders will slightly push the end mill to one side when the screw is tightened. This offset from center is small, but significant for end mills smaller than 5/16 in. in diameter. Consider using an ER collet holder for small diameter tools and close tolerance finishing applications. This is not significant in 1/2 in. and 3/8 in. tooling, but begins to become important on smaller cutters.

The ER-20 and ER-16 collet holders will mount tooling on center, without the offset inherent to a set screw holder. These collet holders are recommended if you are using 1/4 in. or smaller cutters that are based on a larger shank diameter, even if the shank offers a Weldon flat for mounting. The set screw holders will work for this application, but the tool will last longer and the machined finish will be better when using an ER holder.

For a list of ER collets and their clamping ranges, visit our shopping guide for ER collet sizes.

Tool switching with the Tormach Tooling System (TTS) is extremely easy: Simply loosen the drawbar, slide out the current tool holder, then slip in the next and retighten. The unique geometry of the TTS tool holder ensures that, as the drawbar is tightened, the tool holder moves into an exact Z height while increasing rigidity. Each TTS holder has a shoulder that is undercut so it contacts the spindle itself, not the end of the collet. As the drawbar is tightened the collet will simultaneously squeeze the shank and be pulled upward into the spindle taper. This simultaneous action, grasping while moving up, pulls the tool holder tightly against the spindle face. The high-pressure contact between the shoulder of the tool holder and the spindle is the equivalent of a zero tolerance fit; the vertical location (Z-height) of the tool is exact. The initial placement, created by simply sliding the tool holder up until it stops, is normally within a few thousandths of an inch. The final location, after tightening the collet, is exact, highly repeatable, and not affected by the variable tension of the drawbar or wear on the collet.

Here is the complete Tormach Tooling System Catalog and the Tormach Tooling System Manual.

Here is a picture and an animated graphic showing how the Tormach Tooling System works.


Compatibility

This product works with mills with a 3 Morse taper spindle taper and a R8 spindle taper including:

  •   Grizzly G0758 Mill/Drill
  •   Bolton XJ-9510 Mill/Drill
  •   Clarke CMD300 Milling Drilling Machine
  •   Grizzly G8689 Mini Milling Machine
  •   Hare & Forbes HM-10 Mill/Drill
  •   Princess Auto 8507667 Powerfist Mini Mill
  •   SIEG X2-MT3 Mini Mill
  •   Micro-Mark 82573 MicroLux Milling Machine
  •   BusyBee CX605 Craftex Mini Mill
  •   Cummins (Tools Now) 7877 Mini Mill
  •   Eastwood 32498 Mini Mill
  •   Harbor Freight 44991 Central Machinery Mill/Drill
  •   Homier 03947 Speedway Mini Mill
  •   King Canada KC-15VS King Industrial Mini Mill
  •   Northern Tool 49657 KLUTCH Mini Mill
  •   Penn Tool Co XJ-9510-1 Precise Mini Mill
  •   SIEG X2-R8 Mini Mill
  •   Travers Tools OT2213 OTMT Mini Mill
  •   SIEG X2P Mini Mill
  •   LittleMachineShop.com 4962 SIEG Mini Mill
  •   SIEG X2D Mini Mill
  •   SIEG X2L Mini Mill
  •   WEN 33013 WEN Mini Mill
  •   SIEG X2LF Mini Mill
  •   BusyBee CX612 Craftex Mini Mill
  •   SIEG SX2 Mini Mill
  •   Micro-Mark 84630 MicroLux Mini Mill
  •   LittleMachineShop.com 3900 HiTorque Mini Mill
  •   SIEG SX2L Mini Mill
  •   LittleMachineShop.com 3990 HiTorque Mini Mill
  •   LittleMachineShop.com 3960 HiTorque Mini Mill
  •   LittleMachineShop.com 4190 HiTorque Mini Mill
  •   LittleMachineShop.com 6450 HiTorque Mini Mill
  •   SIEG SX2LF Mini Mill
  •   Grizzly G0781 Mill/Drill
  •   SIEG X2.7 Bench Mill
  •   SIEG X2.7L Bench Mill
  •   WEN 33075 WEN Bench Mill
  •   LittleMachineShop.com 5500 HiTorque Bench Mill
  •   LittleMachineShop.com 6500 HiTorque Bench Mill
  •   SIEG SX2.7 Bench Mill
  •   LittleMachineShop.com 6570 HiTorque Bench Mill
  •   LittleMachineShop.com 5550 HiTorque Bench Mill
  •   LittleMachineShop.com 6550 HiTorque Bench Mill
  •   SIEG SX2.7L Bench Mill
  •   Grizzly G0463 Mill/Drill
  •   Harbor Freight 93885 Central Machinery Mill/Drill
  •   SIEG X3 Small Mill
  •   Woodstock International M1110 Shop Fox Small Mill
  •   BusyBee CX611 Craftex Small Mill
  •   Grizzly G0619 Mill/Drill
  •   SIEG SX3 Small Mill
  •   Travers Tools OT2225SX3 OTMT Small Mill
  •   Grizzly G0704 Mill/Drill With Stand
  •   Grizzly G0759 Mill/Drill With Stand
  •   Grizzly G3103 Vertical Mill
  •   Grizzly G3102 Vertical Mill
  •   SIEG X3.5 Large Bench Mill
  •   LittleMachineShop.com 6750 HiTorque Large Bench Mill
  •   LittleMachineShop.com 6700 HiTorque Large Bench Mill
  •   LittleMachineShop.com 6770 HiTorque Large Bench Mill
  •   Grizzly G0722 Bench Mill
  •   Grizzly G0720R Bench Mill
  •   SIEG SX4 Bench Mill
  •   Harbor Freight 33686 Central Machinery Small Mill
  •   Rong Fu RF-xx Milling & Drilling Machine
  •   Grizzly G0516 Lathe Mill Combo
  •   SIEG M6 Multi-purpose Machine