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SD - Shrink Fit Holders


Pioneer Shrink Holders


  • Ultimate Precision: 0.0001” TIR Guaranteed @ Bore
  • Long Lasting: Manufactured from ISO-40CrMoV5 Material, Heat Treated for Optimum Elasticity and Tool Life
  • Powerful: Toleranced and Ground for 10,000 lbs of pull out force
  • Performance Milling: Designed for Performance Milling with Neutral flute geometry, not designed for hi-helix applications

Highest Quality - Designed to Last
PIONEER Shrink Fit is manufactured from ISO-40CrMoV5 Tool Steel, Double Tempered at 1050ºF to withstand up to 10,000 tool changes.

All holders are 100% inspected on Air/Electronic gaging and the ID is ground for a maximum of 3 microns (0.0001”) Runout (TIR) in the Bore.

Dynamically Balanced
PIONEER Tapered Shrink Fit Holders are Dynamically Balanced for G2.5 @ 25,000 RPM’s or >1gmm


Available Options

 DBT30BT40 
 CAT40CAT50 
HSK63A HSK100A 
Straight Ext 

For EZ Shrink Machines click here!

Jet-Blast Options to fit YOUR Application

We at Pioneer have invested in an EDM Drilling machine which allow us to customize Jet-Blast  coolant  holes to your application.

It comes down to coolant volume.

Every Jet-Blast Holder or collet comes with 2 ports standard. Depending on style and type we have the ability of adding as many holes as your coolant volume can support without losing pressure.  
The goal is to create a reducing effect to the volume of coolant to maintain or increase pressure.  This allows for increased chip evacuation and free cutting.


Any standard Shrink can be modified from stock.  Adding a “J” to the end of the part number will provide you with 2 coolant ports.  
Need additional ports? Add “J 4-Port” to the part number for additional ports (additional fees will apply).  
Contact our customer service department for details and pricing.
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