Starrett - Micrometer Heads

These large micrometer heads are designed for use with electronic equipment requiring ultra-fine adjustment for machine tools, fixtures, special gages and tools, special mountings, or wherever micrometer accuracy in setting and adjustment is required.

The micrometer heads with 2 1/16" (52 mm) thimble diameter have widely spaced .0001" or 0.002 mm graduations. The micrometer heads with 4 1/16" (103 mm) thimble diameter have graduations up to .000050" or 0.001 mm.

Another highly useful feature is the spindle adjustment, which permits adjusting the spindle length approximately ± 1/16" (1.5 mm). If the spindle is to be located against a definite stop and a different zero position is required, first loosen the cap screw in the end of the thimble, position the spindle to the desired location, then holding the spindle in position, rotate the thimble to zero and retighten the cap screw. In achieving this adjustable feature, we have still retained our positive taper-lock large thimble bearing.

Readability, Accuracy and Long-Life Features:

• All graduations are direct reading – no vernier lines to match
• All reading surfaces have Starrett satin chrome finish as the no-glare background for the sharp lines and figures
• All graduations on sleeves and thimbles have advanced styling with staggered graduations for easy reading
• The spindle is carbide faced for long life
• Thimble and sleeve are made of aluminum to reduce weight
• Furnished with a speeder (not a ratchet) for quicker adjustment
• Extremely hard and stable one-piece spindle for accuracy and long-life
• Micro-Lapped measuring face for flatness and squareness
• Quick and easy adjustment
• Starrett workmanship

The No. 468 Series Micrometer Heads are exactly the same as the No. 465 Series, except that they have double figures in red and black on the sleeve and thimble, permitting reading both ways with the spindle moving in either direction. This feature is invaluable on many instruments and microwave applications.

These heads have 2 1/16" (52 mm) thimble diameter with widely spaced .0001" or 0.002 mm graduations for direct reading.

Direct-Reading, Large Micrometer Heads
No. 465, 465M Series - Range: 0-2" (0-50 mm)

Direct-Reading, Large Micrometer Heads
No. 468, 468M Series - Range: 0-2" (0-50 mm)

J.W. Donchin Co.
Ph: 773-261-2182 • Fax: 773-261-2867 • Email: sales@jwdonchin.com