​Masa Expands Offering of Microconic Over-Grip Collets with New Long-Land T-type Series.

OCEANSIDE, CA.  Masa Tool has expanded their line of Microconic over-grip collets to include a new style called a "T-type."  The T-type over-grip collet has a longer gripping surface than the original W-type. We designed it specifically for longer parts such as bone screws with wide pitch threads.

The Microconic  over-grip collets provide more work holding and programming options than previously available. It enables you to move operations from the main spindle to the sub-spindle. This balances the work being performed between the main and sub time which can dramatically reduce cycle time.  

​The land width on the W-type over-grip collet, pictured at the right,  is approximately 1 X Diameter of the workpiece. 

The Microconic W-type over-grip collet can swallow up to 4mm over the held diameter

But,  in some cases, with longer parts, the land width "B" needs to be longer to support the workpiece properly.
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Masa's new T-type collet provides the solution for longer workpieces

Typically with over-gripping applications, a shorter land length/clamping pad length/grip length is desired because of limited space available to hold the workpiece behind the enlarged head or flange that it is reaching over. That is what our original W-type collet was optimized for.

However, with longer parts, with more surface area for clamping and gripping room, a longer land length is often preferred to provide more stability to support the longer length workpiece.

​It may also be necessary with very wide-pitched threads, such as on bone screws, where a long land in the collet allows spanning several thread pitches instead of just one or two. This same spanning issue can occur with parts that have wide grooves.

The  new "T-type" over-grip collet,  has a longer gripping surface than our original W-type: Typically 2 - 3 times the diameter of the workpiece.

​For extra long parts, the T-type collet provides the opening needed for the larger head to pass through the collet, so it can be pushed through the back end of the spindle for ejection when required.

The Microconic T-type over-grip collet provides 2 -3 times the land width "B" of the W-type over-grip collet to support longer parts.

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Microconic T-Type Over-grip Collet features

• Standard gripping land length is 2x - 3x diameter. (vs. about 1x diameter with W-type)
• Available from Ø1.55 - 7.2mm (Ø.061" - .283"). 
• Opens 3.5mm diameter (.138") larger than the clamping diameter. (vs. 4mm larger with W-type).
• Every size available to ship within 2 days of order.
• Same Microconic accuracy and rigidity.

Typical uses are generally for over-gripping of longer parts:

• Bone screws with wide-pitch threads
• Orthopedic surgical drills and taps
• Long shafts with flange
• Long, thin walled tubular parts
• Long plastic parts

Masa Microconic Overgrip Collets: W-type (upper) & T-type (lower)

If you've tried other companies overgrip collets with poor results, Microconic over-grip collets  will allow you to do things you might have thought impossible!

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About Masa Tool
Masa Tool is an international rotary workholding manufacturer of a unique clamping system called Microconic which is designed for small diameter, high tolerance part machining. Based in Oceanside, California, Masa Tool serves the automotive, aerospace, defense, medical, electronics, energy, composites and other industries. The Microconic system replaces existing sub-spindle collets with the Microconic system in an ever-increasing number of CNC swiss machine tool OEM’s worldwide by providing 5µm (0.0002") clamping concentricity.