Constant Torque Springs
Constant torque springs are normally used as the constant torque spring motor, which is consisted of two drums and a prestressed winding flat strip.
Yongsheng produces various constant torque springs and supplies full customization services including design, manufacturing, mounting & assembly.
YongSheng constant torque springs are made of high yield 301 stainless steel, which features anti-rust, high resistance, high hardness. when it be coiled through the springs forming machine, it will generate resistance for uncoiling.
Higher output force in limited space.
Unlimited useful turns, which is high efficiency.
Easy to deploy multiply load, and get the bigger rotational force.


YongSheng constant torque springs
- High life circle, from 5000-25000 times depend on the different environment and product specifications, with special technology, our constant torque springs have a longer life than competitive.
- Favorable price, based on numerous standard tools, you can get a favorable price, even for the customized products, you will benefit from our rich experience and high efficiency.
- High quality with strong performance, YongSheng performs stringent quality control criteria throughout the entire production process, just for almost zero defective rates.
- One-stop service, pre-sales, and after-sales expertise guidance, as well as assembling and adjusting additional service.
Constant Torque Spring design Mechanism
Constant torque spring seems like the constant force spring in appearance, we need to fix it to a shaft as the storage drum when using it, and the spring’s end is connected to another shaft that adheres to a spool as the output drum.
when the force exerted on the spool, which will lead the spring to unwind around the shaft and the storage drum will generate counterpart force, we often use this retractable feature in many applications like cordless window blinds/window shades, automatic retractable devices, and so on.
Product No. | T(mm) | W(mm) | L(mm) | Min.Torque(n.mm) | Max.Torque(n.mm) | I.D(mm) | O.D(mm) |
---|---|---|---|---|---|---|---|
YSH011574B | 0.115 | 7.4 | 2032 | 47 | 50 | 12.63 | 21.56 |
YSH0174A | 0.1 | 7.4 | 2032 | 37 | 39 | 11.22 | 19.54 |
YSH01574W | 0.15 | 7.4 | 2032 | 68 | 84 | 15.62 | 25.24 |
YSH01674X | 0.16 | 7.4 | 2032 | 79 | 93 | 16.17 | 26.03 |
YSH01510A | 0.15 | 10 | 2200 | 89 | 98 | 15.28 | 25.69 |
YSH01510E | 0.15 | 10 | 2200 | 105 | 122 | 13.45 | 24.64 |
YSH01310H | 0.13 | 10 | 2200 | 75 | 84 | 13.05 | 23.38 |
YSH0092546 | 0.09 | 25.4 | 2050 | 97 | 127 | 11.84 | 19.69 |
YSH0122549 | 0.12 | 25.4 | 2050 | 190 | 205 | 11.96 | 21.50 |
T: Thickness W: Width L: Length (Choose a product in the table, you’ll get a favorable price)