Constant Force Spring Engineering

Constant Force,
Across the Full Travel.

Custom constant force springs engineered around load, travel, drum diameter, cycle life and mounting configuration—from prototype to repeat production.

34+ Years ISO 9001 Certified Custom Engineering
Custom constant force spring manufactured by Zongda
CUSTOM ENGINEEREDBuilt to Your Mechanism
Engineering Parameters

What Defines a
Constant Force Spring?

A successful design balances required load, usable travel, installation diameter, cycle life and mounting details.

Send your requirements
01

Required Load

Target force across travel

02

Working Travel

Extension and return distance

03

Drum Diameter

Storage and mounting geometry

04

Cycle Life

Expected operating repetitions

05

Mounting Ends

Attachment and formed end details

06

Environment

Temperature and corrosion exposure

Material Selection

Strip Material Options.

Final strip material is selected around load stability, cycle life and operating environment.

01

65Mn

Carbon spring steel

02

SK4 / SK5

High-carbon spring steel

03

SUS301

Stainless spring steel

04

Other

Discuss materials with our team

Need help selecting a grade?Discuss your operating conditions
From Requirement to Production

A Clear Process for
Constant Force Springs.

01

Share Requirements

02

Engineering Review

03

Prototype

04

Production

05

Inspection

06

Delivery

Applications

Balanced Movement.
Consistent Force.

Roller Blinds
01

Roller Blinds

Smooth shade positioning

Window Balances
02

Window Balances

Controlled sash movement

Monitor Arms
03

Monitor Arms

Balanced height adjustment

Shelf Pushers
04

Shelf Pushers

Consistent product facing

Medical Equipment
05

Medical Equipment

Smooth vertical adjustment

Industrial Guards
06

Industrial Guards

Controlled lifting assistance

Have a different rewind mechanism?Let’s evaluate your application
Start Your Project

Send Us the Travel and Load.
We’ll Define the Spring.

A drawing, existing sample, required force or application description is enough to begin an engineering review.