Compression springs

Materials
„C” part numbers
Music wire: ASTM A228 or AMS 5112 
Stainless steel / INOX: Type 302 as per ASTM A313 or AMS 5688 spring temper
„D”  part numbers
Music wire: DIN 17223, JIS G4314 SWP-A/B vagy AMS 5112
Stainless steel / INOX: Type 301, 302 or 304 as per DIN 17224 or JIS G4314 SUS 302/304 or AMS 5688 spring temper
 
Music wire is not recommended for applications where temperature exceeds 121°C (250°F).
Stainless steel / INOX  is not recommended for appplications where temperature exceeds 260°C (500°F).
Stainless steel / INOX  is slight magnetic due to cold working during manufacturing. Stainless steel / INOX springs may have a slight residue of nickel on the surface of the wire. This is normal and will not affect the function.

Tolerances
„C” part numbers
Outside diameter
1,45 - 3,02 mm
± 0,08 mm
3,05 - 6,10 mm
± 0,13 mm
6,12-12,70 mm
± 0,20 mm
12,73 - 25,40 mm
± 0,38 mm
25,43 - 31,12 mm
± 0,51 mm
31,14 - 37,08 mm
± 0,76 mm
37,11 - 50,08 mm
± 1,02 mm
Load P
± 10%
Rate R
± 10%
 

 

„D”  part numbers
All dimensions and forces to DIN 2095 (Grade 2.)
 
Ends
„C” part numbers
Outside diameter 1,45 - 2,24 mm - squared and unground
Outside diameter >2.24 - squared and ground
„D”  part numbers
Wire up to 0,8 mm - squared and unground
Wire over 1,0 mm - squared and ground

Load
Load values shows are based on a service life of 50,000 cycles at 0.50 stress range. For normal service springs should not be compressed. To determine the load at any working lenght use rate pruposed deflection. P=(L-Lx)*R, where Lx is the new load height. Reference only:
 
1 lb = 4,448 Newton
1 Newton = 0,225 lb
1 kg = 9,80665 Newtons
1 Newton = 0,10197 kg

Surface finish
Music wire - oiled
Stainless steel / INOX - plain wire
Shot-peened and plated finishes supplied an request