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Videos

Shop Talk EP 5 MMC

Monday, April 1, 2024

If you need more clearance and flexibility in machining, the MMC Mini-Mini collet chuck features a slim and compact body for precision machining with small diameter tools (up to 0.500”). This will enable high runout accuracy with superb surface finish and part tolerance. The MMC collet chuck is ideal for high speed machining applications where clearance is needed, and it also serves as an alternative to a shrink fit system.

Key three features of the MMC collet chuck include: versatile collet system, slim nose, and high accuracy. Watch the video to find out more!

Why the MMC Series is a Game Changer

The MMC (Mini-Mini Chuck) is specifically designed to solve the “interference” problem. When machining deep cavities or working in tight work envelopes, standard ER collet chucks often have a nut diameter that is too large, leading to collisions with fixtures or the workpiece.

  • The Pilot Contact Advantage: Unlike standard collet systems, the MMC utilizes a precision pilot contact. This ensures that the collet is seated perfectly every time, providing runout accuracy of less than 3 microns.

  • Vibration Dampening: The thick-walled construction of the MMC body, despite its slim nose, provides the dampening characteristics required to eliminate chatter in high-speed finishing operations.

  • Balanced for High RPM: Small-diameter tools require high spindle speeds. The MMC is precision-balanced to ensure stability at the speeds necessary for micro-milling and drilling.

Key Application Highlights from the Episode

  • Micro-Machining: We discuss how the MMC provides the stability needed for end mills as small as 0.1mm, ensuring the tool doesn’t “walk” or break due to runout.

  • Reach and Clearance: The episode demonstrates how the 4-degree taper of the MMC allows for deep-reach machining that would be impossible with traditional tool holders.

  • Setup Efficiency: We walk through the proper torque and cleaning procedures to ensure that your MMC holder maintains its precision over thousands of cycles.

Industry Focus: Medical and Aerospace

The episode concludes with a look at real-world applications. In medical manufacturing, the MMC is the gold standard for producing surgical bone screws and orthopedic implants. In aerospace, it is used for the intricate cooling holes and fine features found in turbine components.