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

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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' Tips

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.

Photos

"End Mill Holder

Compatibility

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
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 3960 HiTorque Mini Mill
LittleMachineShop.com 6450 HiTorque Mini Mill
LittleMachineShop.com 3990 HiTorque Mini Mill
LittleMachineShop.com 4190 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 6500 HiTorque Bench Mill
LittleMachineShop.com 5500 HiTorque Bench Mill
SIEG SX2.7 Bench Mill
LittleMachineShop.com 6550 HiTorque Bench Mill
LittleMachineShop.com 5550 HiTorque Bench Mill
LittleMachineShop.com 6570 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 6700 HiTorque Large Bench Mill
LittleMachineShop.com 6750 HiTorque Large Bench Mill
LittleMachineShop.com 6770 HiTorque Large Bench Mill
Grizzly G0720R Bench Mill
Grizzly G0722 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