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CAT40 3/8 x 4.72" Curved Shrink Fit Tool Holder

Name: CAT40 3/8 x 4.72" Curved Shrink Fit Tool Holder
SKU: 202-7485
Availability: InStock

SKU

202-7485

$125.00

In stock

Shipping UPS Ground

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Details

More Information
Mfg SKU #	202-7485
Tool Holder Category	Shrink Fit Holder
Brand	Tegara
shank size	CAT40
Bore Diameter	3/8
projection length	4.72
end mill holder style	standard
max rpm balanced to	G2.5 25000
TIR (inch)	0.0001
drawbar thread size	5/8x11UNC
Nose Diameter	0.49
Bore Depth	1.18
Coolant Through	No

Design

Designed for 5-Axis

Curved shrink fit tool holder is designed to achieve minimum interference while staying rigidity at long reach applications, ideally for 5-axis machining. Nose diameter is dramatically reduced compared to a standard shrink fit tool holder to give more accessibility.

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.

Start to 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.

Craftmanship

Mirror Finished

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

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

3/8"
Projection Length

4.72"

Bore Depth

1.18"
TIR (at collet face)

< 0.0001"
Max Balanced To

G2.5 30,000 RPM

Coolant Type

Non-Coolant Thru
Taper Nose Diameter (Min)

0.4307"
Taper Nose Diameter (Max)

2.0866"

Spotlight

Minimum Clearance

In the mindset to minimize the wall thickness, the 0.4931" nose diameter extension nose provides better tool clearance in long reach application.
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.