Spring rate: ± 10% ; Solid Height Tolerance: +5%, no lower limit
*Except where noted to meet DIN 2098
This O.D. table not applied to Lite Pressure, HEFTY Die, REDUX, or MIL-SPEC

Spring rate: ± 10%

Spring rate: ± 10%
Solid Height Tolerance: Max, no lower limit

Spring rate: ± 10%
*Except where noted to meet DIN 2097 or MIL-SPEC

Spring rate: ± 10%
End Hooks Position: Inline within 22°
Relative Position of End Hook Openings is Factory Optional

Stock Torsion Engineering Notes and Tolerances

General Notes

1. Lengths of legs are shown as "A" in sketches below.

2. Please note: "R" (radius in inches) where force is applied is always 1/2 of "A" (Length of Leg). Dotted lines of legs show loaded position where values of "T" (Torque) will be achieved at "R" (Radius).

3. To translate torque values to direct load: Use Formula - P = T/R P = Load applied at Radius (R) T = Torque Example: Part LTL 012A 01, what is the load where R = .187? Using P = T/R = .050/.187 = .267lbs.

4. To calculate torque values other than those listed (Position of Ends), a direct proportion may be used. Example: Part LTL 012 A 01. Torque shown in catalogue listing is .050 in-lbs. for 90° deflection; therefore, torque for 45° would be .025 in-lbs.

5. Inspection of Load - Loads should always be checked at the Radius ("R" value)

   

6. Mandrel Size: Generally, torsion springs are used over a mandrel (shaft or arbor). The column "Suggested Mandrel Size, Inches", allows approximately a 10% clearance for the various deflections shown in examples below. If you require greater deflections, we suggest a suitable reduction in the mandrel size.

7. Direction of Wind: Good design dictates that torsion springs should be used in the direction that winds the coil. When ordering be sure to choose either LTL (Left Hand Wound) or LTR (Right Hand Wound) for required application.

   

Stock Torsion Outside Diameter (OD) Tolerances