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SR.NO. MEASURING INSTRUMENTS RANGE L.C. B.M.C (±)
1 Feeler Gauge Upto 2 mm ----- 1.0 µm
# B.M.C.= Best Mesurement Capability of SHTC
TOLERANCES ON THICKNESS OF BLADES (as per I.S. 3179 - 1990.)
Nominal Thk. Of Blade Permissible Departure From nominal thickness Permissible Variation in Thk. Of blade
0.03 up to & including 0.04 mm ± 0.004 mm 0.004 mm
Above 0.04 up to & including 0.35 mm ± 0.005 mm 0.005 mm
Above 0.35 up to & including 0.65 mm ± 0.008 mm 0.008 mm
Above 0.65 up to & including 1.00 mm ± 0.010 mm 0.010 mm