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CAT40 1/4 x 5.12" Shrink Fit Tool Holder

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SKU 202-7803

CAT40 1/4 x 5.12" Shrink Fit Tool Holder

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  • CAT40 1/4 x 5.12" Shrink Fit Tool Holder
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SKU 202-7803
Mfg SKU # 202-7803
Tool Holder Category Shrink Fit Holder
Brand Tegara
shank size CAT40
Bore Diameter 1/4
projection length 5.12
end mill holder style long reach
max rpm balanced to G2.5 30000
TIR (inch) 0.0001
drawbar thread size 5/8x11UNC
Nose Diameter 0.83
Bore Depth 1.42
Coolant Through No
Full Details
shars cat40 tool holder

Start to Finish

We optimize our process for both efficiency and accuracy by utilizing Kawasaki robotic arms to load and unload bar stock into the Mazak multi-tasking machine centers. We use JIS# SKD61 (ANSI H13) alloy steel to lay the foundation and case harden to RC 57-59 with a core of RC 34-39 to provide good core strength and maximize wear life. The core creates a dampening effect which reduces vibration in high speed milling to improve surface finish. The AT3 or better taper accuracy ensures 80% or better taper contact with spindle and using Stotz Air/Electronic Gaging for inspection on the taper. We precision grind the internal bore surface to <.0002" TIR and all bores are ground on a CNC grinder to ensure close run-out tolerance and evenly contact between the collet and the bore pocket. We use Haimer laser balancing machines to deliver a tool that can operate flawlessly at 20000 RPM and Mitutoyo or Mahr indicators to check the run out.

Craftsmanship

  • curved shrink fit holder

    Mirror Finished

    Taper ground to AT3 or better specification ensures 80% or more contact with spindle to reduce harmonics and improve runout tolerance

  • shars cat40 tool holder

    Pilot Contact

    Inside bore are precision turned to engage a better contact with retention knob's pilot to increase rigidity

  • shars cat40 tool holder

    Taper End Face

    Precision turning surface finish provide perpendicular contact with the flange of retention knob to increase rigidity

Tech Specification

  • Taper Size

    CAT40

  • Bore Diameter

    1/4"

  • Projection Length

    5.12"

  • Bore Depth

    1.42"

  • TIR (at collet face)

    < 0.0001"

  • Max Balanced To

    G2.5 30,000 RPM

  • Coolant Type

    Non-Coolant Thru

  • Taper Nose Diameter (Min)

    0.83"

  • Taper Nose Diameter (Max)

Product Spotlight

  • Dynamic Balancing

    Tool holder is balanced to G2.5 30,000 RPM on a HAIMER Tool Dynamic Balancing System from Germany.  Balanced tool holder minimizes the centrifugal forces which minimize the stress on spindle bearing, minimize vibration and maximize the cutting tool's life cycle and greatly improve surface finish. 

  • Pre-Balance Design

    Unique design feature in the flange to minimize the off-balance nature of CAT 40 taper specification.  On the shoulder under the flange, a side is mill flat to compensate the weight of the metal chips lost from forming the spherical hole in the flange.  This design allows the left side and right side of the holder to achieve 50-50 perfect weight distribution in its upright position, like the position inside a machine spindle. Symmetrical design in evenly weight distribution will minimize centrifugal force in high speed spinning and thus maximize the holder's ability to hold the cutting tool concentric to spindle rotation.

     

  • .0002" Runout at 4xD Length


    To achieve 3 micron or better internal bore runout, our internal bore are precision ground on Toyo CNC grinder from Japan. There is not cutting corner on this time consuming internal grinding process and the low runout would contribute to longer cutting tool life and better surface finished.

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