Starrett 124 Inside Micrometer Sets are the most popular inside micrometers because of their lightness, ease of use, range and tradition of quality. They are very useful for measuring inside diameters of cylinders, rings and measuring parallel surfaces. The desired range is obtained by assembling rods and spacing collars to the micrometer head. Measuring rods are provided with a shoulder that is set accurately in the micrometer head and locked in position. When assembling rods to the A and B heads, the reading line on the micrometer head should be lined up with the marking on each rod (except for the 2-3" and the 50-75mm rods). Rod diameters are approximately 1/4" (6mm) on the A and B sizes, and approximately 11/32" (8.5mm) on the C size. Each rod has individual length adjustment for the anvil by means of special wrenches furnished.


  • Insulated rods marked with length
  • Adjustable for length
  • Measuring rods are solid
  • Hardened and ground anvils
  • Quick-reading figures
  • 6-1/2" (165mm) long handle is available (124H)


Starrett 124BZ Inside Micrometer Set
Range 2-12"
Graduations 001"
Measuring Rods 10
Spacing Collars One 1/2"
Case Style Padded
Accuracy Lead accuracy +/-.0001" per inch

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124BZ Starrett Solid-Rod Inside Micrometer Set 50546

  • Brand: Starrett
  • Product Code: 124BZ
  • Condition: New
  • Warranty: 1 Year Manufacturer’s Warranty
  • Availability: SHIPS UPS ONLY
  • $452.00
  • $425.00

Tags: 124bz, starrett, solid-rod, inside, micrometer, set, 50546, micrometers