Marshall Spring manufacturing

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Extension springs are designed to absorb and store energy and create a resistance to a pulling force. Initial tension determines how tightly together an extension spring is coiled. The initial tension is equal to the minimum force required to separate adjacent coils. This initial tension can be adjusted to achieve the load requirements of your particular application.

There are many different types of end loops or hooks that can be used with extension springs. The most common types of ends include machine hooks, full loops, cross-over center loops, centered hooks or eyes, and swivel hooks.

At Marshall Spring, we have the capability to duplicate almost any end required, or design the correct end for your application.

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Unit of Measure: Imperial | Metric | Both

Specifications · Capabilities

Specifications

Materials		Beryllium Copper Brass Suggested Chrome Silicon Chrome Vinadium Elgiloy Hard Drawn Inconel 600 Inconel 718 Inconel X750 Monel 400 Monel K-500 Music Wire Oil Tempered Stainless Steel 17-7 Stainless Steel 302 Stainless Steel 316

Diameter		.10 to 6.00 in 2.54 to 152.4 mm

Wire Size		.010 to .375 in .254 to 9.525 mm

Free Length		.25 to 120 in 6.35 to 3048 mm

Type of Loops		Machines Hooks Crossover Single Full Loop Double Full Loop Side Hooks Extended

Direction of Wind		Left Hand Right Hand Optional

Finish		Black Oxyde Cadmium Painted Passivate Plain Zinc Gold Zinc Silver

Capabilities

Diameter Type		Inside Diameter (ID) Outside Diameter (OD)

MORE IMAGES


	· Extension

	· Extension 2

	· Extension 3

	· Finger Loop Spring

	· Extension4

	· Extension5

	· .281" Extended Extension

	· .027" Extension

	· .054" Extension

	· .312" Doulbe Loop Ext

	· small swivel spring

	· Dual Extension Spring

	· Garter Spring

Materials

Diameter

Wire Size

Free Length

Type of Loops

Direction of Wind

Finish

Diameter Type