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T040-120-1871-R

T040-120-1871-R

SPEC® Torsion Springs are coil springs that fit into rotary applications, unlike Compression Springs and Extension Springs which only operate in a linear direction. Torsion Springs are attached to two components. As they rotate around the central axis of the spring, they create a rotational force that returns the components to their original position.
Torsion Springs are usually placed on a mandrel, shaft, or support rod. The recommended mandrel sizes allow for the reduction of inside diameter as the spring is actuated. The springs must be deflected in the same direction as the coils are wound. Unwinding the spring reduces the maximum load. Standard parts are available with various initial leg positions.
Minimum quantity: 10

Diagram / specifications section

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AApproximate Axial Width (in)0.387
ΘDeflection (°)120
ELeg Length (in)1.25
ODOutside Diameter (in)0.309
MRecommended Mandrel Diameter (in)0.206
TPTest Point (in)0.625
TTorque at Deflection (in lbf)0.99
dWire Diameter (in)0.04

Item specifications

  • Helix DirectionRightHand
  • Leg Position (°)120
  • MaterialType 302 Wire
  • Material Chemistry/DimensionalASTM A313, AMS 5688
  • Material TypeStainless Steel
  • Max. Operating Temperature (F)500
  • Min. Operating Temperature (F)-320
  • Weight (lb)0.00245

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