Starrett - Outside Micrometers

This is a slightly heavier micrometer with thermal insulators mounted on the frame front and rear. This spindle and anvil are sized at .250" (6.35 mm).

Readability Features

• Starrett satin chrome finish – no glare – resists rust
• Advanced sleeve design with staggered lines and distinct figures for precise and easy readability
• Quick-reading figures – every thousandth numbered on Inch tools

Ease-of-Handling Features

• Balanced frame and thimble design insure easy handling and better readability
• Ring-type knurled lock nut for quick and sure locking
• A combination ratchet and speeder for uniform pressure and quicker adjustment on all sizes
• Gracefully designed tapered frame for use in narrow slots and tight places

Accuracy and Long-Life Features

• Rigid one-piece frame of drop forged steel
• Extremely hard and stable one-piece spindle (the heart of our accuracy)
• Micro-lapped measuring faces
• Quick and easy adjustment
• Starrett workmanship

Micrometers - No. 231, 231M Series
with insulated frames
Range: 0-1" (0-25mm)

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