This can be stopped on the way of cable travel because of ratchet system. (ER-3A, ER-5A, ER-10A)
The jamming of the cable will not occur because of its cylingrical drum.
They has long cable travel (ER-3A・3B, 5A・5B =3m, ER-10A・10B = 4m) and are designed light and compact.
| Model | Initial Max. tension (tension at retracted) |
Active cable travel m |
Tension build-up, full length of cable |
the number of available spring winding |
with or without ratchet |
Diameter of cable φmm |
Mass kg |
|---|---|---|---|---|---|---|---|
| ER-3A | 18 N (1.8 kgf) |
3 | 12 N (1.2 kgf) |
About 16 | with | 2.38 | 1.4 |
| ER-3B | without | 1.3 | |||||
| ER-5A | 25 N (2.5 kgf) |
3 | 25 N (2.5 kgf) |
About 13 | with | 1.5 | |
| ER-5B | without | 1.4 | |||||
| ER-10A | 4 | 49 (5.0 kgf) |
About 13 | with | 4.5 | ||
| ER-10B | without | 3.8 |
( Note：The tension increases gradually as the cable is pulled out. For example, on ER-5A, supporting that the tension of spring is adjusted at 25N｛2.5kgf｝when the cable is fully retracted, the tension of spring (when the cable is pulled out 3m) is equal to 50N (25+25)｛2.5＋2.5=5kgf｝
Tension curves
The relation with the number of drum revolving and the length of winding cable：
The length of winding cable per one revolving of drum
ER-3A．3B、5A．5B aboot 350mm
ER-10A．10B about 480mm
