256RL-3 Starrett Disc-Type Micrometer with rotating spindles 2-3*

256RL-3
Starrett Disc Type Micrometer
with rotating or non-rotating spindles

These tools are used to measure the thickness of work sections such
as ribs, lands, fins, cutting edges on form tools, and chordal thickness
of gear teeth. Because of their large anvil and spindle faces, the 1"
and 25mm sizes are also useful for measuring the thickness of sheet
materials like paper, cardboard, rubber, and plastics.
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
• Convenient decimal equivalents on 1" and 2" reading tools
  Ease-of-Handling Features
• Balanced frame and thimble design ensure easy handling and
  better readability
• Ring-type knurled lock nut for quick and sure locking
• The 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
• Anvil and spindle discs are 1/2" (12.7mm) diameter tapering to
  .015" (0.4mm) edge thickness making it possible to enter narrow
  grooves and recesses
• Available in the 1" and 25mm sizes with rotating or non-rotating
  spindle
  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
• This tool is accurate to ±.00015" or ± 0.003mm measuring over
  the whole surface and ±.0002" or ±0.004mm measuring on the
  edges