CAT40 1/4, 1/2, 3/4, 7/8 End Mill Tool Holder 4pc Set
Shipping UPS Ground
Shipping UPS Ground
|Mfg SKU #
|Tool Holder Category
|End Mill Holder
|1/4, 1/2, 3/4, 7/8
|end mill holder style
|max rpm balanced to
|drawbar thread size
|Dual Contact Tool Holder
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.
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.
Taper ground to AT3 or better ensures 80% or more contact with spindle to reduce harmonics and improve runout tolerance
Inside bore are precision turned to engage a better contact with retention knob's pilot to increase rigidity
Precision turning surface finish provide perpendicular contact with the flange of retention knob to increase rigidity
1/4", 1/2", 3/4", 7/8"
2.5" for 1/4", 1.2" for 1/2" , 1.75" for 3/4" & 7/8" Bore
20,000 RPM G2.5
0.88", 1.38", 1.70", 1.75"
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.
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.
Cutting Tool: Gorilla Mill 1/2" 3 Flute Silverback Knuckle Dragger Series (SKU# 422-3122)
Workpiece Material: 6160 Aluminum
Machine: CNC 3-axis machining center
RPM: 15000 IPT: 0.005
SFM: 1963 DOC: 1.0