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KORRETTO · Machining center tooling

CNC Tool Holders

Hydraulic tool holders and reduction sleeves for precision milling, drilling and finishing operations. KORRETTO supplies HSK, BT / BBT and SK hydraulic tool holder systems for machining centers that require stable clamping, low runout and repeatable tool changes.

Not sure which taper or sleeve size fits your spindle and tool shank? Send the spindle interface, tool diameter, machining process and accuracy requirement, and we will help check the suitable holder series.

Browse CNC Tool Holders by Series

Select the tool holder series according to the spindle interface, tool shank diameter, machining process and required rigidity. For hydraulic holders, the taper type and reduction sleeve combination should be confirmed together.

HSK hydraulic tool holder

HSK Hydraulic Tool Holder

Product type
HSK hydraulic tool holder
Typical applications
High-speed machining centers, precision milling, drilling and finishing operations

HSK hydraulic tool holders provide stable tool clamping and high repeatability for machining centers that require balanced performance at higher spindle speeds. They are suitable for small-diameter tools, finishing cuts and precision machining processes.

BT and BBT hydraulic tool holder

BT / BBT Hydraulic Tool Holder

Product type
BT / BBT hydraulic tool holder
Typical applications
General machining centers, milling, drilling and precision tool clamping

BT and BBT hydraulic tool holders are used on machining centers that require reliable tool clamping, good rigidity and repeatable tool changes. Standard and slim configurations can be selected according to tool access and machining space.

SK hydraulic tool holder

SK Hydraulic Tool Holder

Product type
SK hydraulic tool holder
Typical applications
DIN 69871 spindle systems, milling, drilling and high-accuracy machining

SK hydraulic tool holders are designed for DIN 69871 spindle interfaces and provide stable clamping for milling, drilling and finishing applications. They are suitable for workshops that use SK taper machines and need consistent tool positioning.

Reduction sleeves for hydraulic tool holders

Reduction Sleeves for Hydraulic Tool Holders

Product type
Hydraulic tool holder reduction sleeve
Typical applications
Tool shank diameter conversion for HSK, BT / BBT and SK hydraulic holders

Reduction sleeves allow one hydraulic holder body to clamp different tool shank diameters. They help reduce tool holder inventory while keeping stable clamping performance for milling, drilling and finishing operations.

Quick Selection Guide

Better suited for

  • Machining centers using HSK, BT / BBT or SK spindle interfaces
  • Precision milling, drilling, reaming and finishing operations
  • Applications requiring stable tool clamping and low runout
  • Tooling setups that need repeatable tool changes
  • Workshops using reduction sleeves to cover multiple shank diameters

May not be the first choice for

  • Workholding applications where a chuck or fixture is needed instead of a tool holder
  • Manual drilling machines that require a drill chuck
  • Very heavy roughing operations where mechanical milling chucks may be preferred
  • Cases where the spindle taper, tool shank size or tool length cannot be confirmed

Key Points for Selecting CNC Tool Holders

Before selecting a hydraulic tool holder, confirm the spindle interface, tool shank diameter, machining process and available tool length. These factors affect rigidity, runout, accessibility and long-term repeatability.

FAQ

What is a CNC hydraulic tool holder used for?

A CNC hydraulic tool holder is used to clamp cutting tools on machining centers. It helps provide stable tool holding, low runout and repeatable tool positioning for milling, drilling, reaming and finishing operations.

How do I choose between HSK, BT / BBT and SK hydraulic tool holders?

The holder must match the machine spindle interface. HSK holders are commonly used on high-speed machining centers, BT / BBT holders are widely used on general machining centers, and SK holders are used with DIN 69871 spindle systems. The final choice should be confirmed according to the machine spindle, pull stud system and machining process.

When should I use a reduction sleeve?

A reduction sleeve is used when the tool shank diameter is smaller than the holder bore. It allows one hydraulic holder to clamp different tool shank sizes while maintaining stable clamping performance.

What is the difference between a CNC tool holder and a drill chuck?

A CNC tool holder is designed to hold cutting tools in a machining center spindle with controlled accuracy and rigidity. A drill chuck is mainly used for drilling tools and general drilling applications. They are different product categories and should not be selected only by tool diameter.

Can one hydraulic holder be used for different tool diameters?

Yes, if the holder supports suitable reduction sleeves. The sleeve must match the holder bore and the tool shank diameter. For precision machining, the holder, sleeve and tool should be selected as a complete clamping combination.

What information should I provide for tool holder selection?

Please provide the machine spindle type, tool shank diameter, machining process, tool length requirement, spindle speed range and accuracy requirement. Drawings or photos of the existing holder can also help confirm the correct series.

Email: qzy@korretto.com