| Cold-Formed Compression Coil Spring |
| Item |
Tolerances & Ranges |
| Free Height |
(a) If there is a specification of spring
characteristics, free height
is regarded
as a reference value.
(b) If there isn't a specification
of spring
characteristics, tolerances are
based on
the following table. |
| |
Grade1 |
Grade2 |
Grade3 |
| D/d |
4 to 8 |
}1.0%, Min.}0.2mm |
}2.0%, Min.}0.5mm |
}3.0%, Min.}0.7mm |
| over 8 to 15 |
}1.5%, Min.}0.5mm |
}3.0%, Min.}0.7mm |
}4.0%, Min.}0.8mm |
| over 15 to 22 |
}2.0%, Min.}0.6mm |
}4.0%, Min.}0.8mm |
}6.0%, Min.}1.0mm |
|
D: Mean Diameter of Coil, d: Wire Diameter
|
| Diameter of Coil |
Coil diameter is specified to an outside
diameter or an inside diameter.
And its tolerance is based on
the following
table. |
| |
Grade1 |
Grade2 |
Grade3 |
| D/d |
4 to 8 |
}1.0%, Min.}0.15mm |
}1.5%, Min.}0.20mm |
}2.5%, Min.}0.40mm |
| over 8 to 15 |
}1.5%, Min.}0.20mm |
}2.0%, Min.}0.30mm |
}3.0%, Min.}0.50mm |
| over 15 to 22 |
}2.0%, Min.}0.30mm |
}3.0%, Min.}0.50mm |
}4.0%, Min.}0.70mm |
|
| Total Coils |
(a) If there is a specification of spring
characteristics, total coils is regarded
as a reference value.
(b) If there isn't a specification of spring
characteristics, tolerance of total coils
is }1/4. |
| Squareness |
| |
Grade1 |
Grade2 |
Grade3 |
| e |
0.02H0 |
0.05H0 |
0.08H0 |
|
| H0: Free Height |
|
Load
at specified height |
| |
Grade1 |
Grade2 |
Grade3 |
| Active coils |
over 3 to 10 |
}5% |
}10% |
}15% |
| over 10 |
}4% |
}8% |
}12% |
|
| Spring Constant |
| |
Grade1 |
Grade2 |
Grade3 |
| Active coils |
over 3 to 10 |
}5% |
}10% |
}15% |
| over 10 |
}4% |
}8% |
}12% |
|
|
|
|
