Vikarsh Stampings India Private Limited

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Quality Standards

Tolerance chart
for CRGO laminations 001

ATTRIBUTE ACCEPTANCE LIMITS
THICKNESS + /- 0.02 mm. Total difference in thickness in a direction Perpendicular to rolling direction should not exceed 0.02 mm
LENGTH Upto 700 mm + 0.0 /-0.5 mm 701 to 2000 mm + 0.0 /-1.0 mm Over 2000 mm +0.0 /-1.5 mm
WIDTH Upto 150mm +0.0/-0.2 mm
151 to 500 mm +0.0 /-0.3 mm
501 mm and above + 0.0/-0.4 mm
CAMBER 0.9 mm max. on a length of 2000 mm per side on surface table
V NOTCH 90 deg + / - 5 minutes
MITRED ANGLE 45 deg + / -5 minutes
HOLE DIAMETER + 0.10 /-00 mm
STACKING FACTOR 95 % min. for 0.23mm thick material
96 % min. for 0.27 mm and 0.30 mm thick material 96.5 % min. for 0.35 mm thick material
INSULATION RESISTANCE Min. 10 ohms /cm2 as per Franklin method described in IS 649 -1997
BURR 20 microns maximum
WEIGHT OF EACH STEP +0.5% TO 1.0% or as per customers requirements.
WATT LOSS / KG As per old AISI and BIS 601 the Watt Loss/Kg is as follows :-
M-3 - 0.77 watts/kg at 1.5T and 50 Hz
M-4 - 0.89 watts/kg at 1.5T and 50 Hz
M-5 - 0.97 watts/kg at 1.5T and 50 Hz
M-6 - 1.10 watts/kg at 1.5T and 50 Hz

However for the last couple of years the emphasis has shifted from the guaranteed watt loss at 1.5 T/50 Hz to the guaranteed watt loss at 1.7 T/50 Hz.

Now the watt loss comprises the following in order given as per the following figures :-Tolerance chart
Based on the above we are giving below some International Standards for magnetic properties.

Vikarsh Stampings India Private LimitedVikarsh Stampings India Private Limited

Product Range

Nanocrystalline Toroidal Cores And Ribbons|  Mitred Transformer Lamination  |  Step Lap  |  Toroidal Cores (Ring Cores)  |  Core Frame Assemblies
Rectangular Strips in CRGO and CRNO  |  Slit Coil  |  Taping and Copper Winding  

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