New-Surplus Starrett 460A Micrometer Head features .001" graduation and 0-1/4" range. 0-1/4” Range, .001” Grad, Plain.
These are plain micrometer heads with no lock nut or ratchet. Each unit comes with a certificate of authenticity showing that it has been individually inspected. These precision micrometers meet or exceed accuracy and performance requirements of national and international standards, and are traceable to the United States National Institute of Standards and Technology(NIST).
- Range (in): 0-1/4"
- Graduations (in): .001"
- Spindle Material: Steel
- Spindle Type: Choose Flat or Spherical tip
- Thimble Type: Plain
- Accuracy (in): +/-.0001"
*These micrometers appear to have been a custom run from Starrett. These 460A micrometer heads feature a spherical tip spindle instead of the standard flat tip spindle.
The pitch of the screw thread on the spindle is 40 threads per inch. One revolution of the thimble advances the spindle face toward or away from the anvil face precisely 1/40" or .025 inches. The reading line on the sleeve is divided into 40 equal parts by vertical lines that correspond to the number of threads on the spindle. Therfore, each vertical line designates 1/40" or .025 inches. Lines vary in length for easy reading. Every fourth line, which is longer than the others, designates a hundred thousandth. For example, the line marked "1" represents 0.100" and the line marked "2" represents 0.200" respectively.
Range of motion: 0-10mm
Starrett 460A Micrometer Head 0-1/4" /flat or spherical tip
- Item ID: 251506
- Brand: Starrett
- Model: 460A
- Availability: In Stock
- Condition: New-Surplus