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End Mill Holders
Click on a Product to view details.


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Balanced Short Projection

Balanced and short items. Collis stubby end mill holders provide maximum rigidity, a minimal projection for clearance and minimal deflection of the tool maximizing tool performance.
  • Eliminate chatter
  • Improve finish and roundness
  • Extend tool life
  • Reduce wear on spindle
  • Allows higher speeds and feeds without vibration
  • Designed, built and certified in the USA for use by the most advanced manufacturers around the world
  • Concentricity . 0.0002"
  • Holders balanced to G 2.5 Specifications.

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Short Projection

  • AT3 taper accuracy and better
  • Exceeds ANSI standards
  • Hardened RC52-56
  • Concentricity <= 0.0002"

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Cat V-Flange Tooling

  • Traverse ground tapers
  • AT3 taper accuracy and better
  • Exceeds ANSI standards
  • Hardened RC52-56
  • Thru coolant capability
  • Set screw included
  • Concentricity <= 0.0002"

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Cat V-Flange Inch Bore DIN 69871 A/B


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Cat V-Flange Metric Bore DIN 69871 A/B


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Heavy Metal Bar Holders

Heavy metal boring bars provide higher rigidity and dampening of vibration. Collis boring bar holders are best suited for machining bores of 6:1 length over diameter ratio.
  • Traverse ground tapers
  • Hardened RC52-56
  • Set screw included
  • Exceeds ANSI standards
  • Thru coolant capability
  • Concentricity < 0.0002"
  • AT3 taper accuracy and better

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Carbide Bar Holders

Optimum rigidity for carbide boring bars and machining long bores.

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BT Tooling


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Tightening Fixtures


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Hydraulic End Mill Holders

Provide guaranteed precision of 0.0002" at four inches out. A precision grip hydraulic chuck is the most accurate toolholder for finishing end mill applications. It maximizes the use of each cutting edge of an end mill tool. Hydraulic chucks provide for reaming, gun drilling and boring operations where finish and tool life specifications cannot be accomplished economically with other tools and processes.
Positive stop actuating set screw provides optimal gripping forces on the end mill cavity.
Holders are not through coolant capable.

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Milling Chuck Holders

  • Extreme rigidity.
  • Axial accuracy: Concentricity . 0.0002"
    Straight bushings will grip the end mill evenly across the end mill shank.
  • This provides a gripping force twenty times greater than a standard tapered collet.
  • Flats and end mill shank depressions will not distort the milling chuck bore.
  • Tightening torque of 22 ft/lbs is minimal for a tremendous gripping force as compared to a tapered collet chuck.
  • The collapse range is 0.0015" below nominal.
  • Holders has coolant thru capabilities.

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Collets


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NMTB

  • Precision Milling Machine Holders for Straight Shank End Mills. End Mills are securely held by one or two set screws.

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Rapid-Change Adapters


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Rapid-Change Master Holders

The Master Holders listed are for use with the Rapid Change Adapters. This eliminates the need to remove Master Holder from spindle when using different size end mills.

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Morse Taper Shanks

Morse Taper End Mill Holders provide quick change capabilities with the use of End Mill Adapter.

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Keeper Slots

Some machines require a keeper slot to secure the end mill holder in the machine spindle. Collis provides this service upon request.
Specify:-
  • Width of Keeper Slots.
  • A, B & C dimensions of spindle.

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Extensions

Straight shank tooling for extended length machining is less costly than purchasing custom holders. The outside diameter allows close cutting operations where space is limited.
Extensions hold double end mill

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Cat V-Flange Extended Length

  • Collis 40 and 50 CV-Flange Tooling is designed to give maximum rigidity and maximum reach. They are also available in custom projections.
  • Precision ground AT3