Rotary Springs | McMaster-Carr

2.25
3
3.25
4
4.17
4.25
4.75
5
5.17
5.25
5.5
5.75
5.88
6
6.17
6.25
6.5
6.75
6.88
7
7.17
7.25
7.5
7.63
7.75
7.88
8
8.16
8.5
8.63
8.75
8.88
9
9.5
9.63
9.75
9.88
10
10.5
10.63
10.75
10.88
11.5
11.63
11.75
12.5
12.63
12.75
13.63
13.75
14.63
14.75
16.63
17.63

	Leg Length Leg Length

0.375"

	Spring Length @ Maximum Torque Spring Length @ Maximum Torque

	Width Width

	Thickness Thickness

	Load Load

	Number of Turns Number of Turns

11.5

16.5

	DFARS (Defense Acquisition Regulations Supplement) DFARS (Defense Acquisition Regulations Supplement)

DFARS Specialty Metals
COTS-Exempt

	REACH (Registration, Evaluation, Authorization and Restriction of Chemicals) REACH (Registration, Evaluation, Authorization and Restriction of Chemicals)

REACH Compliant

	RoHS (Restriction of Hazardous Substances) RoHS (Restriction of Hazardous Substances)

RoHS Compliant

	Extended Length Extended Length

	ID ID

	Useful Life Useful Life

	Number of Mounting Holes Number of Mounting Holes

	Mounting Hole Diameter Mounting Hole Diameter

760 Products

Springs

Torsion Springs

Use these steel springs in noncorrosive environments.

Corrosion-Resistant Torsion Springs

Made of stainless steel, these springs are more corrosion resistant than steel springs.

Made-to-Order Torsion Springs

Whatever the size, we'll get the spring you need.

Rotor Springs

Wind these springs to store power, then release them to create rotary motion—similar to winding a wristwatch. Also known as clock springs and power springs.

Constant-Force Springs

No matter how far you extend them, these springs pull back with the same amount of force.

Constant-Force Retractors

For controlled extension and retraction, these retractors provide the same amount of force no matter how far you extend them. The flexible attachment cable allows a wider range of movement than standard constant-force springs.

Variable-Force Springs

Unlike constant-force springs, the farther you pull these, the harder they are to pull. Use them for applications where the load becomes lighter as the spring contracts, such as in automated dispensing machines.

Clip-On Constant-Force Springs

Clip the end onto a flat surface to install—no fasteners needed. Once installed, these springs pull back with the same amount of force no matter how far you extend them.