Detail Specifications / Descriptions

Constant Force Springs












Constant torque springs features its offer high torque output with very smallspace requirements and its will providing a smooth, uniform torque through its deflection. Deflection is limited only by the length of material in the spring. Design method reference Design Center example.
If you need special Constant force or Constant torque spring size, our experienced engineers are able to design one that is right for your application.


































Type A Characteristics






1. Constant output torque (zero gradient).
2. Low output torque.
3. No intercoil friction (smooth operation, low hysteresis losses).
4. Low life.
a. Maximum torque obtained at a life of 2,500 cycles.
b. Life increases as output drum increases.
5. Large number of output turns.
6. Spring can operate as clutch on output drum.













Constant torque spring theoretical analysis(A type)












　　Material \ Item
t
b
test shaft
Inner diameter
Outer diameter
straight end
Toque ±10%
operating stress
Spring length
(Recommend) working length
Life cycles prediction
unit weight


mm
mm
mm
mm
mm
mm
N.mm
N/mm2
mm
mm
cycles
g/pcs


SUS301
0.1
6.4
21.5
15.4
15.92
16
0.725192
1209.91
127.848
43.8499064
50K~75K
0.732



Input paramenters section
Results section























Type B Characteristics








1. Constant output torque (zero gradient).
2. High output torque (efficient use of material).
3. No inter coil friction (smooth operation, low hysteresis losses).
4. Low life.
a. Maximum torque obtained at a life of 2,500 cycles.
b. Maximum practical life = 35,000 cycles.
5. a. Sf = 0.025 produces 5,000 cycles life
b. Sf = 0.010 produces 50,000 cycles life
6. High number of output turns (over 50 turns possible).















Constant torque spring theoretical analysis(B type)













　　Material \ Item
t
b
test shaft
Inner diameter
Outer diameter
straight end
Toque ±10%
operating stress
Spring length
(Recommend) working length
Life cycles prediction
unit weight


mm
mm
mm
mm
mm
mm
N.mm
N/mm2
mm
mm
cycles
g/pcs


SUS301
0.1
6.4
21.5
15.4
15.92
16
26.53663
2076.55
127.848
43.8499064
10K~20K
0.732



Input paramenters section
Results section