Description
Starrett No. 50A Improved Trammel Head
Precision USA Layout Tool | Fine-Adjusting Screw Point
This vintage Starrett No. 50A Improved Trammel Head is an essential layout tool for machinists, patternmakers, and woodworkers requiring high-fidelity arc and circle scribing. Manufactured in Athol, Massachusetts by the L.S. Starrett Company, this single head features Starrett’s signature fine-adjustment knurled screw mechanism for exacting point setting along a wooden or steel beam.
Key Features:
Fine Adjustment Mechanism: Includes a knurled thumbscrew for micro-adjusting the scribing point.
Heavy Cast Construction: Solid steel/iron casting with original clamping thumbscrew for beam mounting.
Precision Layout Application: Designed to fit standard wooden or metal trammel bars.
Condition Note:
This trammel head is in uncleaned, honest vintage condition. All threading operates smoothly. Please note this listing is for a single head with adjustable point (missing its partner fixed trammel head), making it ideal as a replacement part or custom build component.