Tolerance
We use German testing standards,Following please find explanation for the tolerances

1. FLEXIBILITY
MATERIAL LOWER DIE UPPER DIE
THICKNESS HARDNESS Beta R1 S No. Alpha R No.
0.71 H2/HF 50° 1 6 E1 40° 0.50 S1
0.71 H3 60° 1 6 E2 40° 0.50 S1
1.05 H2 60° 1 6 E2 40° 0.50 S1
1.05 H3 70° 1 10 E3 40° 0.75 S2
1.42 H2 70° 1 10 E3 40° 0.75 S2
1.42 H3 100° 1 10 E4 40° 0.75 S2

Detail description of parameters are mentioned in the above table

Parameter for Hardness TIP HARDENED BODY HARDNESS TIP HARDNESS
H2/HF WITH TIP HARDENED HRC34~38 / HV340~380 HRC51~56 / HV520~620
H3/HF WITH TIP HARDENED HRC40~46 / HV400~460 HRC51~56 / HV520~620
H2 WITHOUT TIP HARDENED HRC34~38 / HV340~380
H3 WITHOUT TIP HARDENED HRC34~38 / HV340~380
H4 WITHOUT TIP HARDENED HRC34~38 / HV340~380


2. TOLERANCE OF THICKNESS ACCORDING TO DIN 1544P
THICKNESS TOLERANCE
0.45mm / 1.27pt +/- 0.015mm
0.53mm / 1.5pt +/- 0.015mm
0.71mm / 2pt +/- 0.015mm
1.06mm / 3pt +/- 0.020mm
1.42mm / 4pt +/- 0.025mm


3. TOLERANCE OF HEIGHT
HEIGHT TOLERANCE
Regardless +/- 0.02mm


4. CONCAVITY

When length is 1,000mm, X=0.5mm


5. FLATNESS

The max. of X=Height(H) x 0.001
Ex.: 23.8mm material height X=23.8*0.001=max. 0.024mm




6. Concavity Tolerance
When the Length (L) = 1,000mm, the max.of the X is 0.5mm

Ex. This standard is for meter length only, not for coil.