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124B Solid -Rod Inside Micrometer Set 50544

Starrett 124 Solid-Rod Inside Micrometers
2-12” Range, .001” Grad, 10 Measuring Rods

The Starrett 124 Solid -Rod Inside Micrometer Sets are the most popular inside micrometers because of their lightness, ease of use, and range. They are very useful for measuring inside diameters of cylinders and 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. 2-12” Range, .001” Grad, 10 Measuring Rods furnished.

This item is discontinued. Please consider the recommended alternative listed above or contact our special order department at (978) 249-3551 x410 for more information.

3D CAD Files / Exploded Parts Diagram
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  • 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)


  • Made in America: Yes
  • Micrometer Type: Inside Micrometer Set
  • Range (in): 2-12"
  • Graduations (in): .001"
  • Measuring Rods (qty): 10
  • Spacing Collars: One 1/2"
  • Accuracy (in): Lead accuracy +/-.0001" per inch


    2D Dimensional Drawing (PDF)



    83.75 kb

3D CAD Files / Exploded Parts Diagram

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Product Testimonials

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      Member of Kit
      Item #DescriptionPart No.QtyInformation
      2•NUT, .375-5217071-01
      3•BODY,ENGLISH #124A B17073-01
      4••HANDLE, SHORTPT01546A1
      5••SCREW, .110-52 LOCK X .186 LONGPT0154601
      6•SHELL, OUTSIDE 01535-01
      7•SPINDLE SCR, .297-4017077-01
      8•CAP, SHELL01539-01
      9COLLAR, SMALLPT015791
      10ROD W/ANVIL 2-3"PT991911
      11ROD W/ANVIL 3-4"PT991921
      12ROD W/ANVIL 4-5"PT991931
      13ROD W/ANVIL 5-6"PT991941
      14ROD W/ANVIL 6-7"PT991951
      15ROD W/ANVIL 7-8"PT991961
      16ROD W/ANVIL 8-9"PT991971
      17ROD W/ANVIL 9-10"PT991981
      18ROD W/ANVIL 10-11"PT991991
      19ROD W/ANVIL 11-12"PT992001
      20WRENCH #3PT015261
      21POINT WRENCH, #124PT191771

    California Proposition 65 Warning

      WARNING: This product can expose you to chemicals including lead, which is known to the State of California to cause cancer, and birth defects or other reproductive harm. For more information go to: