It is almost impossible to give proper specifications for a spring of this type except by means of a sample or a print or sketch.
The general specification as to diameter, length, gauge and number of coils can be given, but it is difficult to understand any description of special ends and avoid mistakes.
We therefore require complete information by sample or drawing on this class of spring. It is imperative always that we know the direction of the coils, i.e.- whether left- or right-hand, as a torsion spring should always be operated I the direction which causes the coil to close, or, in other word, causes the diameter to reduce. A spring operated in the wrong direction will either break or bend out of shape under comparatively little strain.
In drawing up specifications for torsion springs, observe the following points:
- Diameter, stating whether inside or outside dimension.
- Size of shaft or rod over which spring operates.
- Number of coils required, and state whether right- or left-hand.
- If the spring is assembled under tension, state how many turns are required to produce initial tension and the number if turns required beyond the initial point.
- State how rapidly the spring operates
- If required to carry a certain weight, specify how far from the centre of the coils this weight is applied, as leverage must be computed accordingly.
- Show angles of arms by number of degrees of arc and show length of all bends and diameters of all eyes and hooks.
Consider that each turn will reduce the diameter and allow sufficient clearance between inside diameter of coil and diameter of rod or shaft. A spring which binds on shaft will break or set.
Consider also that each turn will elongate the coil a distance equal to the thickness of the wire of which it is made; allowances must be made for this elongation; if spring is confined, by coiling with sufficient space between coils to permit this elongation; if spring is closed coiled, the surrounding parts must be far enough apart to allow this movement.
Wire Diameter d mm |
Outside Diameter OD mm |
Body Length LO mm |
Arm Length A mm |
Recom Shaft Size S.D. mm |
Relative Orientation of Arms DIAG |
Angular Deflection DEG |
Approx Number of Coils |
Music Wire |
Stainless Steel |
||
|---|---|---|---|---|---|---|---|---|---|---|---|
Torque N/mm |
Product Code | Torque N/mm |
Product Code | ||||||||
0.35 |
5.25 |
1.5 |
15 |
3.5 |
1 |
90 |
3.25 |
4.5 |
T10100 |
3.6 |
T20100 |
3.0 |
2 |
180 |
6.55 |
T10110 |
T20110 |
||||||
4.5 |
3 |
270 |
9.75 |
T10120 |
T20120 |
||||||
6.0 |
4 |
360 |
13.0 |
T10130 |
T20130 |
||||||
0.42 |
5.50 |
1.80 |
15 |
4.0 |
1 |
90 |
3.25 |
9 |
T10140 |
7.2 |
T20140 |
3.80 |
2 |
180 |
6.55 |
T10150 |
T20150 |
||||||
5.40 |
3 |
270 |
9.75 |
T10160 |
T20160 |
||||||
7.20 |
4 |
360 |
13.0 |
T10170 |
T20170 |
||||||
0.51 |
6.00 |
2.20 |
20 |
4.0 |
1 |
90 |
3.25 |
18 |
T10180 |
14.4 |
T20180 |
4.40 |
2 |
180 |
6.55 |
T10190 |
T20190 |
||||||
6.60 |
3 |
270 |
9.75 |
T10200 |
T20200 |
||||||
8.80 |
4 |
360 |
13.0 |
T10210 |
T20210 |
||||||
0.61 |
6.25 |
2.60 |
25 |
4.0 |
1 |
90 |
3.25 |
36 |
T10220 |
28.8 |
T20220 |
5.20 |
2 |
180 |
6.55 |
T10230 |
T20230 |
||||||
7.80 |
3 |
270 |
9.75 |
T10240 |
T20240 |
||||||
10.40 |
4 |
360 |
13.0 |
T10250 |
T20250 |
||||||
0.75 |
7.25 |
3.20 |
30 |
4.50 |
1 |
90 |
3.25 |
72 |
T10260 |
57.6 |
T20260 |
6.40 |
2 |
180 |
6.55 |
T10270 |
T20270 |
||||||
9.60 |
3 |
270 |
9.75 |
T10280 |
T20280 |
||||||
12.80 |
4 |
360 |
13.0 |
T10290 |
T20290 |
||||||
0.91 |
7.75 |
4.0 |
35 |
4.70 |
1 |
90 |
3.25 |
144 |
T10300 |
115 |
T20300 |
8.0 |
2 |
180 |
6.55 |
T10310 |
T20310 |
||||||
12.0 |
3 |
270 |
9.75 |
T10320 |
T20320 |
||||||
16.0 |
4 |
360 |
13.0 |
T10330 |
T20330 |
||||||
1.10 |
8.50 |
4.70 |
40 |
5.0 |
1 |
90 |
3.25 |
288 |
T10340 |
230 |
T20340 |
8.0 |
2 |
180 |
6.55 |
T10350 |
T20350 |
||||||
12.0 |
3 |
270 |
9.75 |
T10360 |
T20360 |
||||||
16.0 |
4 |
360 |
13.0 |
T10370 |
T20370 |
||||||
1.37 |
10.30 |
6.0 |
50 |
6.0 |
1 |
90 |
3.25 |
576 |
T10380 |
461 |
T20380 |
12.0 |
2 |
180 |
6.55 |
T10390 |
T20390 |
||||||
18.0 |
3 |
270 |
9.75 |
T10400 |
T20400 |
||||||
24.0 |
4 |
360 |
13.0 |
T10410 |
T20410 |
||||||
1.82 |
16.0 |
7.75 |
60 |
10.0 |
1 |
90 |
3.25 |
1152 |
T10420 |
922 |
T20420 |
15.50 |
2 |
180 |
6.55 |
T10430 |
T20430 |
||||||
23.25 |
3 |
270 |
9.75 |
T10440 |
T20440 |
||||||
31.0 |
4 |
360 |
13.0 |
T10450 |
T20450 |
||||||
2.50 |
19.75 |
9.27 |
70 |
12.2 |
1 |
90 |
3.25 |
3304 |
T10460 |
1844 |
T20460 |
18.54 |
2 |
180 |
6.55 |
T10470 |
T20470 |
||||||
27.81 |
3 |
270 |
9.75 |
T10480 |
T20480 |
||||||
37.08 |
4 |
360 |
13.0 |
T10490 |
T20490 |
||||||
TORSION SPRINGS CAN BE MADE TO YOUR SPECIFIC DESIGN. FOR DETAILS PLEASE CONTACT OUR SPECIAL COMPONENTS DIVISION