64mm Springs | McMaster-Carr

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Compression Springs

As you squeeze a compression spring, it pushes back to return to its original length. Spring rate is the amount of force required for every inch of compression or, for metric springs, millimeter of compression. The higher the spring rate, the harder it is to compress the spring.

Springs with closed and ground ends sit flat, so they won’t buckle.

For technical drawings and 3-D models, click on a part number.

Metric

64 mm Lg.
OD, mm	ID, mm	Wire Dia., mm	Compressed Lg. @ Max. Load, mm	Max. Load, lbs.	Spring Rate, lbs./mm	Material	End Type	Specifications Met	Pkg. Qty.		Pkg.
11.25	8.75	1.25	18.13	20.18	0.45	Music-Wire Steel	Closed and Ground	DIN 17223, DIN 2095, DIN 2098	1	000000000	00000

Corrosion-Resistant Compression Springs

These springs are more corrosion resistant than standard compression springs. They're also easier to compress than standard compression springs. As you squeeze a compression spring, it pushes back to return to its original length. Spring rate is the amount of force required for every inch of compression or, for metric springs, millimeter of compression. The higher the spring rate, the harder it is to compress the spring.

302 stainless steel springs have good corrosion resistance.

Springs with closed and ground ends sit flat, so they won’t buckle.

For technical drawings and 3-D models, click on a part number.

Metric

64 mm Lg.
OD, mm	ID, mm	Wire Dia., mm	Compressed Lg. @ Max. Load, mm	Max. Load , lbs.	Spring Rate, lbs./mm	Material	End Type	Specifications Met	Pkg. Qty.		Pkg.
45	35	5	29.6	183.73	5.31	302 Stainless Steel	Closed and Ground	DIN 2095	1	00000000	000000

Corrosion-Resistant Precision Compression Springs

Made of stainless steel, these springs are more corrosion resistant than steel compression springs. They’re also easier to compress than steel compression springs. Use where tight OD and spring rate tolerances are required. Closed and ground ends allow the springs to sit flat, so they won’t buckle.

302 stainless steel springs have good corrosion resistance.

316 stainless steel springs have excellent corrosion resistance.

For technical drawings and 3-D models, click on a part number.

Metric

64 mm Lg.
OD, mm	OD Tolerance, mm	ID, mm	Wire Dia., mm	Compressed Lg. @ Max. Load, mm	Max. Load, lbs.	Spring Rate, lbs./mm	Spring Rate Tolerance, lbs./mm	Material	End Type	Pkg. Qty.		Pkg.
11.25	-0.4 to 0.4	8.75	1.25	18.13	17.94	0.39	-0.04 to 0.04	302 Stainless Steel	Closed and Ground	1	0000000	00000
11.25	-0.4 to 0.4	8.75	1.25	18.13	17.94	0.39	-0.04 to 0.04	316 Stainless Steel	Closed and Ground	1	0000000	0000

Metric Color-Coded Die Springs

The colors and sizes of these springs follow ISO 10243 for metric die springs. Made of chrome-silicon steel, they have high tensile strength for reliable, long-lasting operation in repetitive applications, such as punching and stamping. All have closed and ground ends, which provide a flat mounting surface for even movement and distribution of loads.

Deflection is the distance the spring compresses, expressed as a percentage of its length.

As you squeeze a die spring, it gets harder to push. Spring rate is the amount of force required for every millimeter of compression. The higher the spring rate, the harder it is to compress the spring.

For technical drawings and 3-D models, click on a part number.

	Wire
Lg., mm	Thick., mm	Wd., mm	Compressed Lg. @ Max. Load, mm	Deflection @ Max. Load	Max. Load, lbs.	Spring Rate, lbs./mm	Material	End Type		Each
Green (Light Load Rating)
For 16 mm Hole Dia. (For 8 mm Shaft Dia.)
64	1.75	2.77	41.6	35%	53	2.4	Chrome-Silicon Steel	Closed and Ground	00000000	00000
For 20 mm Hole Dia. (For 10 mm Shaft Dia.)
64	1.91	4.19	41.6	35%	100	4.4	Chrome-Silicon Steel	Closed and Ground	00000000	0000
For 25 mm Hole Dia. (For 12.5 mm Shaft Dia.)
64	2.54	5.46	41.6	35%	177	7.9	Chrome-Silicon Steel	Closed and Ground	0000000	0000
For 40 mm Hole Dia. (For 20 mm Shaft Dia.)
64	3.43	8.76	41.6	35%	367	16.4	Chrome-Silicon Steel	Closed and Ground	00000000	00000
For 50 mm Hole Dia. (For 25 mm Shaft Dia.)
64	4.95	11.89	41.6	35%	785	35	Chrome-Silicon Steel	Closed and Ground	0000000	00000
Blue (Medium Load Rating)
For 40 mm Hole Dia. (For 20 mm Shaft Dia.)
64	4.75	7.92	44.8	30%	604	31	Chrome-Silicon Steel	Closed and Ground	00000000	00000
For 50 mm Hole Dia. (For 25 mm Shaft Dia.)
64	5.72	11.10	44.8	30%	902	46	Chrome-Silicon Steel	Closed and Ground	00000000	00000
Red (Heavy Load Rating)
For 40 mm Hole Dia. (For 20 mm Shaft Dia.)
64	6.60	8.64	48	25%	967	60	Chrome-Silicon Steel	Closed and Ground	0000000	00000
Yellow (Extra Heavy Load Rating)
For 40 mm Hole Dia. (For 20 mm Shaft Dia.)
64	8.13	8.71	51.2	20%	1,401	109	Chrome-Silicon Steel	Closed and Ground	00000000	00000