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Disk

DISK SPRING

Feature

In case of the disc spring, accumulated energy per unit volume is much greater than that of the coil spring so it shows a very big loading capacity with short stroke in small space. A loaddisplacement curve - straight line or nonlinear type - is available according to the conditions for use. Depending on increase/decrease of the sheets of the disc spring or on series/parallel/combination, the spring can have different characteristics. If it is used within the allowable stress, its lifetime is long. It is good at absorbing shocks and its shock-absorbing efficiency becomes high if the springs are piled up for use,

Usage

For nuclear power plants, safety valves, shock-absorbers of large industrial equipment, control valves, shock-absorbing springs in hydraulic cylinders, rolling stands, and shock-absorbers to stand big load in small space

Criteria of selecting materials according to the use condition of disc spring (for reference)
Materials Heat
Corrosion
Corrosion
Resistance
Fatigue
Resistance
Price Operation
Temperature
Remarks
SUP10(50CR V4) Not bad Not good Good Not bad 200C
SAE1070 Not good Not good Not bad Cheap 100C
SUH660 Not bad Good Not good Expensive 300C Non -
magnetic
SUS 304 Not bad Not bad Not good Not bad 300C
SUS 301 Not bad Not bad Not good Not bad 300C
INCONEL X-750 Very Good Good Not good Very
expensive
500C Non -
magnetic
SKD 4 Good Not good Not bad Not bad 400C
SUS 630 Not bad Not bad Not good Not bad 300C
C5191 Not good Good Not good Expensive 100C
  • Any other material than described above can be used for special purposes
  • You are recommended to discuss with the engineers of Daewon Spring for the design and the material of springs
Specification
Record of specification in ordering disc springs
Classification Special Requirements Remarks
Material in use Normally SUP 10 Choose the material based on the manufacturer's
standards unless specified
Thickness of
material (t)
mm
Inner diameter of
spring (Di)
mm
Outer diameter of
spring (De)
mm
Outer height of
spring (Lo)
mm
Inner height of
spring (Ho)
Vol
Designation of
spring features
Height Load Management is done based oon the manufacturer's
reference value in case there is no designated height and load.
mm kgf
Shape of edge end Facing required
Surface management
after molding
Shot peening
Surface treatment Black phosphate
coating treatment
Treatment with rust preventive oil is possible upon request
Use or conditions for use Record of use condition Surrounding temperature, humidity, and method of use
(series connection, parallel connection, combination connection)
Other specifications applicable DIN 2092, 2093


Allowable Error A. External & Internal Error
Internal Diameter (De) /
External Diameter (Di)
External Diameter Tolerance
(mm)
nternal Diameter Tolerance
(mm)
3 ~ 6mm below 0 ~ + 0.12 0 ~ + 0.12
6 ~ 10mm below 0 ~ + 0.15 0 ~ + 0.15
10 ~ 18mm below 0 ~ + 0.18 0 ~ + 0.18
18 ~ 30mm below 0 ~ + 0.21 0 ~ + 0.21
30 ~ 50mm below 0 ~ + 0.25 0 ~ + 0.25
50 ~ 80mm below 0 ~ + 0.30 0 ~ + 0.30
80 ~ 120mm below 0 ~ + 0.35 0 ~ + 0.35
120 ~ 180mm below 0 ~ + 0.40 0 ~ + 0.40
180 ~ 250mm below 0 ~ + 0.46 0 ~ + 0.46
250 ~ 315mm below 0 ~ + 0.52 0 ~ + 0.52
315 ~ 400mm below 0 ~ + 0.57 0 ~ + 0.57


B. Thickness & Height Load Error
Type Thickness (t) mm Thickness (t)
Tolerance mm
Height (Lo)
Tolerance mm
Load Tolerance
(S = 0.75*ho%)
1 Type 0.2 ~ 0.4 + 0.02 ~ - 0.03 + 0.075
- 0.025
+ 25
- 7.5
0.5 ~ 0.6 + 0.025 ~ - 0.035
0.7 ~ 0.8 + 0.030 ~ - 0.040
0.9 + 0.035 ~ - 0.045
2 Type 1.0 + 0.035 ~ - 0.045 + 0.10
- 0.05
+ 15
- 7.5
1.1 ~ 1.25 + 0.040 ~ - 0.050
1.5 ~ 1.75 + 0.045 ~ - 0.055
2.0 + 0.050 ~ - 0.060
2.25 ~ 2.5 + 0.055 ~ - 0.065 + 0.15
- 0.05
3.0 ~ 3.5 + 0.060 ~ - 0.075
3 Type 4.0 ~ 14.0 +/-0.08 +/-0.20 +/-5