18A Automatic Center Punch 50120

18 Automatic Center Punches
Steel Automatic Center Punch, 5"/125mm Length, 9/16"/14mm Punch Diameter

The Starrett Automatic Center Punch with Adjustable Stroke features a lightweight, knurled steel handle for a positive grip and easy handling. 125mm (5") Length, 14mm 9/16" Diameter.

3D CAD Files / Exploded Parts Diagram
Product Testimonials
California Prop 65

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  • Rugged automatic punches with all-steel handles and parts
  • Internal mechanism automatically - strikes a blow when downward pressure is applied
  • Spring tension, which regulates the blow, is constant so marks made by the point are uniform in depth and size for each setting
  • The point can be easily removed for regrinding or replacement
  • Adjustable knurled cap regulates the force of the blow


  • Made in America: Yes
  • Length (in): 5"
  • Length (mm): 125mm
  • Punch Diameter (in): 9/16"
  • Punch Diameter (mm): 14mm
  • Material: Steel


    2D Dimensional Drawing (PDF)



    26.43 kb




    77.47 kb
    Catalog 33 - Section 17 - Precision Shop Tools

    This section offers quality tools that do not measure, but are needed frequently in manufacturing. Tools such as work positioning tools, scribers, punches, vises and lubricant are an integral part of any shop or manufacturing industry.

    Precision Hand Tools (Catalog 33)

    612 page catalog featuring precision hand tool, force measurement, vison systems, optical comparators, laser measurement, and flat stock.

3D CAD Files / Exploded Parts Diagram

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Product Testimonials

    Write a product review
    • William H. (11/17/2020)
      I’ve owned an 18-a for 40 years. It’s precision is as good today as the first day I used it. Even the mat board box it came in has held up, with the help of a few layers of tape, that is. I’m retired now but still use my 18-a regularly on various projects I take on these days to keep me out of real trouble.


    Member of Kit
    Item #DescriptionPart No.QtyInformation
    10BODY, CENTER PUNCH13751-01
    20CAP, CENTER PUNCH13752-01
    30TIP, CENTER PUNCH13750-01
    40TRIP PIN13753-01
    50SPRING, .201X.343X1.00X.028X913756-01
    70SPRING, .232X.308X1.625.038X1413796-01
    80CENTER PUNCH POINT06690-01

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: www.P65Warnings.ca.gov