Constant force spring

Constant Force Springs Manufacturer’s Design Guide

For your gadget or application, there are several mechanical components to pick from. Consider constant force springs if your device requires a spring. This is an example of an extension spring. Because they don’t follow Hooke’s rule, their force remains constant even when they’re deflected.

Constant force springs are ideal for applications that demand a smooth range of motion and a constant load due to their flat force curve. To see if this sort of spring will function in your device or application, learn more about it.

Lead consideration of constant force springs manufacturer

Here are some things that constant force spring manufacturers to keep in mind during the design process of your project.

Loading situations

As the material expands, constant force springs provide a force. The maximum operational length of constant force springs is specified.

Material

Stainless steel is ideally adapted to withstand corrosion and damage, making it perfect for medical purposes. The majority of constant force spring assembly is of a 301 stainless steel spring.

Lifecycle

To avoid premature failure and to save money on the design, they explicitly specify the lifecycle of your constant force spring. Constant force spring manufacturer’s selection charts will take into account the material, as well as the thickness and coiled diameter of the spring.

Constant force springs assembly methods

The layout of the constant force spring is influenced by the mounting method. A manufacturer can assist you in selecting the most appropriate mounting solution for your application.

The following pointers will help you understand the methods involved in constant force springs assembly:

The diameter of the drum is 10% to 20% bigger than its natural interior diameter.
At maximum extension, one and a half wraps remain on the drum.
Long extensions make the strip unstable, thus it should avoid twisting or twisting on recoil.
Idler pulleys have a wider diameter than the normal diameter and do not bend backward against the normal radius of curvature.

Constant force springs are rolled by stainless steel strips. The high-strength steel strips are shaped by specific production spring equipment. When the external force straightens them, the spring will naturally rewind and produce elasticity, but the goal can return to the starting point we specified after being shifted.

Features:
Constant force spring is made of stainless steel belt rolling, through the specific production of spring equipment to make high strength steel belt shaping, when the external force makes it straight, the spring will naturally rewind and produce elasticity. When it reaches our goal the shift can return to the starting point we specify.

Category: Products

Description

Product inventory

All Products
Part Number	Thickness （mm）	Width (mm)	Length (mm)	I.D. +/- 10% (mm)	O.D. +/- 10% (mm)	Load +/- 10% (N)	Life Cycles
SQ10680	0.10	14.50	680	16.00	22.0	2	4000 cycles
SQ13680	0.13	14.50	680	13.50	28.0	4-6	4000 cycles
SQ20250	0.20	19*2	250	13.00	17.7	38.5	4000 cycles
SQ23500	0.23	12.00	500	14.00	17.8	16-18	4000 cycles
SQ25550	0.25	13.00	550	19.00	23.5	12-14	4000 cycles
SQ26410	0.26	7.00	410	20.00	23.0	6.7-8.3	4000 cycles
SQ30550	0.30	13.00	550	24.00	25.0	20-23	4000 cycles
SQ401080	0.40	40.00	1080	35.00	38.0	50	4000 cycles
WQ10190	0.10	10.00	190	9.50	12.0	3.3-3.7	5000 cycles
WQ13210	0.13	21.00	210	8.00	16.0	7-8	5000 cycles
WQ15438	0.15	12.70	438.15	8.00	15.9	6.5	5000 cycles
WQ19700	0.19	9.50	700	13.00	19.5	7-8	5000 cycles
WQ20500	0.20	9.50	500	0.13	0.2	8-10	5000 cycles
WQ22280	0.22	25*2	280	15.00	21.0	51-54	5000 cycles
WQ25500	0.25	12.70	500	16.00	19.0	20	5000 cycles
WQ26480	0.26	6.40	480	19.00	22.5	7-9.5	5000 cycles
WQ30350	0.30	19.00	350	29.00	30.0	13.5-19.5	5000 cycles
WQ30420	0.30	24.50	420	43.00	45.0	13-19	5000 cycles
LQ421192	0.42	40.00	1192.4	31.50	35.0	66	6000 cycles
BQ19500	0.19	20.00	500	22.00	34.5	8	8000 cycles
BQ28800	0.28	18.00	800	27.00	30.0	15.5-18.5	8000 cycles
BQ37510	0.37	19.00	510	44.00	48.0	15-17	8000 cycles
YW30530	0.3*3	25.00	530	37.00	38.0	85-95	8000 cycles
YW13250	0.13	21.00	250	8.00	16.5	7-9	10000 cycles
YW25300	0.25	16.00	300	28.00	35.0	6.5-7.5	10000 cycles
YW28700	0.28	19.00	700	30.00	33.0	11-12	10000 cycles
YWS30355	0.30	25.40	355	34.50	36.0	17-19	13000 cycles
LW501250	0.50	24.00	1250	30.00	32.0	50-55	20000 cycles

Advantages：

The advantages of a constant force spring over the traditional linear spring

Extremely high elastic output can be achieved in very small device space.
Constant elasticity is maintained in all strokes.
Only a short-stroke can achieve the required elasticity.
The original length is less than the linear spring and the stroke is unlimited.

Function+ Applications：

Constant Force Spring offers high force output, it can be applied for tensioning & loading usage, such as nail pusher of nail gun.

Tensioning & Loading

High Adjustment for Monitors

Counterbalancing

Constant Force Spring features short initial pretension; which means that can afford the rated load at a short extension. Constant Force Spring is ideal for counterbalancing applications, such as high adjustment for monitors.

Constant Force Spring exerts nearly constant force during the entire extension with a small space requirement. Constant Force Spring can be used for applications that require smooth returning and retrieving, such as cup holders in cat interior.

Pull up and down Sliding door/window

When the constant force spring is straightened by an external force, the constant force spring will naturally retract and produce elastic force, which has the motion function of balancing or saving force and can be applied to the lifting of doors and windows.

Multiply the Load: