Surface Gages 56 Small Surface Gages (HARDENED STEEL BASE) • Smaller base and spindle than other surface gages and is designed for lighter work • Two frictionally held gage pins in the hardened steel base which can be pushed down and used against the edge of a surface plate or T-slot for linear work • Weighs only ten ounces (0.28kg.) and takes up very little space in a toolbox • Only 1-3/8" (35mm) high, including the lower sleeve in the rocker arm • Scriber has a 3/32" (2.4mm) diameter and is 3-1/4" (82mm) long 56A 57A 57 Full-sized Surface Gages (CAST IRON BASE) • Full-size surface gage with attractive finish • Base is ground flat with two frictionally held gage pins that can be pushed down and referenced against the edge of a surface plate or T-slot for linear work 257 Full-sized Surface Gages (HARDENED STEEL BASE) • Finest full-size surface gage • Stable steel base is fully hardened, ground and nicely finished • Four frictionally held gage pins that add versatility for referencing the tool 257A 56 Small Surface Gages Cat. No. EDP Spindle Base in mm in mm 56A 50289 4 100 2 x 1-1/2 50 x 38 56B 50290 Two, 4 and 7 100 and 175 56C 50291 7 175 57 Full-sized Surface Gages Cat. No. EDP Spindle Length Base - Length x Width 57A 50292 9" (225mm) 3 x 2-9/16" (75 x 65mm) 57B 50293 9" and 12" (225 and 300mm) 57C 50294 12" (300mm) 3-3/4 x 3-3/8" (95 x 85mm) 57D 50295 12" and 18" (300 and 450mm) 257 Full-sized Surface Gages Cat. No. EDP Spindle Length Base - Length x Width 257A 51240 9" (225mm) 2-7/8 x 2-3/8" (72 x 60mm) 257B 51241 9" and 12" (225 and 300mm) 257C 51242 12" (300mm) 3-1/2 x 3-3/16" (90 x 80mm) 257D 51243 12" and 18" (300 and 450mm) Spindles, Scribers and Standard Snugs for 57 and 257 Surface Gages Fits Spindles Scribers Standard Snugs* A and B Models 5/16 x 9" and 12" (8 x 225mm and 300mm) 9/64 x 6" (3.6 x 150mm) PT18718 (EDP 50709) with 5/16" post hole† C and D Models 3/8 x 12" and 18" (9.5 x 300mm and 450mm) 5/32 x 8-1/2" (4 x 216mm) PT18724 (EDP 50710) with 3/8" (9.5mm) post hole † For snug with 8mm post hole diameter, order PT27171, EDP 66457. * Will hold scribers, rods or indicator stems ranging from 3/32-1/4" (2.4-6.35mm) and allows use with these test indicators: 196, 651, 711**, 564**, 708**, 811**, 650, 709** ** Snugs must be used with the proper indicator holder. 342 P recision S hop T ools