Supplying the most demanding clients in Silicon Valley for over 40 years

Made in USA

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Bay Centerless has been supplying the most demanding clients in Silicon Valley for over 40 years.
We manufacture precision ground bar, threaded stock, circuit board pins, router pins, locating pins, and standard alloy pins. We also provide machine to print, precision grinding, thread rolling, and screw machining services.
Over the years we have built up expertise in a number of specialties, such as medical mandrels, thin wall tubing, OFE copper studs, and non-standard pins. 
All of our manufacturing takes place in our facility in the Bay Area. We are friendly, responsive, and are committed to ensuring that our customers are always fully satisfied. We deliver throughout the Bay Area, and can ship to anywhere in the United States. 

George Zirbes, CEO


Precision Ground Bar

  • Precision ground bar stock +/- 0.0001 and + 0.0005 or - 0.0005.

  • Standard 16 RMS finish in stainless steel alloys: 316, 416, 440, 304, 303.

  • Standard lengths 3ft, 6ft, 12ft.

  • Finishes also available: 12, 10, 8 and 4 (or better)

Threaded Rod

  • Threaded rod 4-40 to 5/8 - 18.

  • Coarse, fine, extra fine, and specials.

  • Also available in metric sizes.

  • Standard "Vee" form in alloys listed above, and 12L14


  • Pins (circuit board pins, router pins, locating pins)

  • Alloy heat treated from OD 0.032 to 0.250 inch, in 0.0005 increments. Standard lengths of 1/2, 5/8, 3/4 inch.

  • Specials on request.

  • All pins are chamfered and burred to prevent scratching of media.



  • Medical mandrels used for glass blowing, stents, and catheters.

  • Grinding of thin wall tubing. Specializing in 304 SST and Nickel-Titanium (Nitinol) down to .0005" wall thickness.

  • Precision ground shafts manufactured complete to print. 5/8 diameter max up to 13 feet long.

  • OFE copper studs. 1/4-20, #10-32, #8-32, stocked in lengths 1" to 2.5" in 1/4" increments.

  • Non-standard pins .020 to .625 diameter, minimum length .050", large and small quantities, as little as two pieces.



Over the years we have served a large number of clients, including the following:


  • IBM

  • Lam Research

  • Lockheed

  • Farlow's Scientific

  • Varian

  • CPI

  • Rainin

  • General Dynamics

  • KLA Tencor

  • PRI

  • Adept

  • PSI Surgical

  • Shape Memory 



  • CNC Swiss Type Screw Machines

  • Cam Screw Machines

  • Thread Rolling: 2 Die Cylindrical; Flat Dies: #0, #10

  • Centerless Grinders: 6 #2's, 3 #1's




For any inquiries please call: (831) 638-1478 or fill out the following form

Contact Us


Bay Centerless Grinding
1690 Lana Way Unit B
California 95023

Telephone: 831-638-1478

Fax: 831-638-1782


Get a quote: (831) 638-1478

© 2020 Bay Centerless Grinding Inc.