Starrett 257C Full-Sized Surface Gage features a 12" (300mm) spindle length and a 3-1/2 x 3-3/16" (90 x 80mm) hardened steel base with satin chrome finish. This precision layout tool from the 257 series is designed for scribing lines parallel to a reference surface.

Starrett Surface Gages are designed for a wide variety of uses. This is a basic tool for machinists and toolmakers. The main uses are for accurately scribing lines, transferring measurements and for probing surfaces in inspection work. 12" Spindle.

Features

• Finest full size surface gage
• Stable steel base is fully hardened, ground, nicely finished and lapped and is hand shaped for sure grip and easy movement
• Four frictionally held gage pins that add versatility for referencing the tool
• Long, 50-division vernier scales that can be read to 0.001 or 0.02 mm without a magnifying glass
• Sliding snug with a knurled, ring-type lock nut for adjustment ease and secure positioning
• The scriber and the base are designed so that the gage will read directly from zero
• The design of the hardened and stabilized bar plus the balanced design and weight of the base eliminate vibration
• Flush-fitting of the vernier scales to the main scale eliminates parallax
• Vertical bar is positioned near the center of the base for balance and stability
• Ability to scribe lines, measure with dial indicators or electronic probes and accept depth attachments
• Auxiliary scriber is a circular carbide scriber that cuts sharp, clean lines smoothly, rotatable for wear
• Easy-reading sharp black lines and figures against Starrett satin chrome finish background
• 12 in L spindle
• 3-1/2 in L x 3-3/16 in W base
• Ground bases for accurate reference surfaces
• V-Groove in the base for cylindrical work
• V-Groove on the front end which allows the spindle to adjust to any angle above or below the base
• A very positive fine adjustment through a rocker arm that makes for smooth and accurate settings