The Starrett® C251C is a rigid, well designed trammel for layout, scribing and measuring distances and circles. The top of the beam is flattened so that when the trams are clamped in position, they will not turn from pressure on the points.

Starrett® Trammel, Series: C251, For Use With: 20 in Beam, Steel, Polished Chrome

• Rigid, well-designed
• The 3 in (75mm) points may be adjusted for length in the spring chucks and can be easily replaced with caliper legs or other attachments listed
• The ball points with 3 in (75mm) holder permit working from holes up to 1-1/2 in (38mm) in diameter
• A pair of 3 in (75mm) caliper points is included with each trammel
• The top of the beam is flattened so that when the trams are clamped in position, they will not turn from pressure on the points
• One tram has a fine-adjusting screw for the points
• Each tram has a knurled swivel grip at the top that turns freely, making it very convenient to swing the tool when scribing circles
• Held in place by spring friction, which prevents them from sliding when the nuts are loosened for setting
• 18 in maximum dividing range
• 36 in scribing Dia range

• https://externalassets.unilogcorp.com/ASSETS/DOCUMENTS/ITEMS/EN/Starrett_C251C_Full_Engineering_Drawing.pdf https://externalassets.unilogcorp.com/ASSETS/DOCUMENTS/ITEMS/EN/Starrett_C251C_Full_Engineering_Drawing.pdf