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Milling Chuck Eliminates Pullout

BIG KAISER has introduced the Mega Perfect Grip from BIG Daishowa, a simple to handle, heavy-duty milling chuck for heat resistant super alloys (HRSA) that is engineered to eliminate end mill pullout under heavy torque loads.

"For manufacturers using milling chucks, pullout is a major issue, particularly when machining HRSAs such as titanium or Inconel," said a company spokesperson. "In demanding applications, such as in the energy and aerospace markets, there is a need for guaranteed security against pullout - ensuring there is no costly damage to parts, or delays in manufacturing processes."

The Mega Perfect Grip, with fully concentric clamping, combines the accuracy and cutting performance of heavy-duty milling chucks with the security against pullout of solid side-lock toolholders.

The concept is simple and assembly is quick. The system is based around milling cutters with a standard Weldon flat (ASME B94.19-1997). No special grinding or threading of the milling cutter is required.

To assemble, insert the exclusive key grip into the Weldon flat of the end mill. Align the key grip with one of three key grip grooves inside the chuck body and insert the cutting tool until it depresses a spring in the clamping bore. The spring functions to remove the gap between the key grip and the wall of the groove, and to provide a slight axial preload on the tool until final tightening is performed. Rotate the end mill approximately 20° until the grip stops securely against a stopping pin. This engagement helps to prevent any slip under high torque. Finalize assembly by tightening the clamping nut until it contacts the positive stop of the chuck body.

The three key grip grooves in the chuck body also serve to provide channels for high-volume coolant to reach the cutter, which is required in milling HRSAs to dissipate heat and to remove chips efficiently.

The Mega Perfect Grip is available in BIG-PLUS BCV50 and HSK-A100 for O.750"-1.250", and HSK-A125 for O1.000" and 1.250". The product is in stock and ready for immediate delivery from BIG KAISER's North American headquarters.

For more information contact:

BIG KAISER Precision Tooling Inc.

2600 Huntington Blvd.

Hoffman Estates, IL 60192

888-TOOL-PRO / 224-770-2999

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