CAT40 3/8x1.75" End Mill Tool Holder
SKU
202-7120
Out of Stock
Shipping UPS Ground
Details
| Mfg SKU # | 202-7120 |
|---|---|
| Tool Holder Category | End Mill Holder |
| Brand | Shars Tool |
| shank size | CAT40 |
| Bore Diameter | 3/8 |
| projection length | 1.75 |
| end mill holder style | stub |
| max rpm balanced to | 12000 |
| TIR (inch) | 0.0001 |
| drawbar thread size | 5/8x11UNC |
| Nose Diameter | 1.06 |
| Dual Contact Tool Holder | No |
| Coolant Through | Yes |
Design
The Devil's In The Details
When you aspire to create one of the most competitive tool holders on the market, the details count. We invest heavily in extensive automation manufacturing and top of the line Mazak and grinding machines while pouring our heart and soul into bringing the tool to life. While not satisfied with just being good, so through customer data and rigorous testing, our R&D team are able to blend over 40 years of manufacturing know-how and real-world feedback to improve the tool holder's design and performance.
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 SCM420 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.
Craftmanship
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AT3 or Better
Taper ground to AT3 or better ensures 80% or more contact with spindle to reduce harmonics and improve runout tolerance
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Pilot Contact
Inside bore are precision turned to engage a better contact with retention knob's pilot to increase rigidity
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Taper End Face
Precision turning surface finish provide perpendicular contact with the flange of retention knob to increase rigidity
Tech Specification
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Taper Size
CAT40
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Bore Diameter
3/8"
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Projection Length
1.75"
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Bore Tolerance
H6
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TIR (at nose face)
< 0.0001"
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Max Balanced To
12,000 RPM
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Coolant Type
Thru Spindle
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Rear Thread Size
5/8-11
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Nose Diameter
1.06"
Spotlight
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Pre-Balance Design Unique design feature in the keyway of the flange to minimize the off-balance nature of CAT 40 taper specification. Drilled hole in the keyway to compensate the weight of the metal chips lost from forming this spherical hole, this design achieves a nearly even weight distribution in its upright position, like the position inside a machine spindle. 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.
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Mirror Finish
To achieve AT3 or better taper contact as an industry standard, our taper surface are precision ground on Shigiya CNC grinder from Japan. We are not satisfied with just meeting the industry standard, the surface roughness on the taper is maintained to mirror finish.
- Flange and V-groove are precision ground to ensure reliable tool change
- Spindle Thru coolant capability
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