Extension Spring - Music Wire

Mechanical Extension Springs are coiled products, in a variety of materials and forms. Extension springs are attached to two components from both ends of the spring, and when the components pull apart, the spring tries to pull the components together again. Extension Springs are wound to oppose extension.

Dependant on the application's load requirements, the springs initial tension can be manipulated. They are often tightly wound in the no-load position and have hooks, eyes, or spring anchors at the ends to attach to the components. Each spring is designed within proper stress levels and manufacturing limits.

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Outside Dia (In.) (Inch)

Wire Dia (In.) (Inch)

Free Length (In.) (Inch)

Spring Rate (lbs./In.) (lbs/in)

Item #	IntegrationID	Height	Depth	Width	Outside Dia (In.)	Wire Dia (In.)	Free Length (In.)	Spring Rate (lbs./In.)	Initial Tension (lbs)	Ends

M11251054000	N/A 206549	N/A 4.000 Inch	N/A 1.125 Inch	N/A 1.125 Inch	N/A 1.125 Inch	N/A 0.105 Inch	N/A 4.00 Inch	N/A 9.2 lbs/in	N/A 3.40 Pound	N/A Full Twist Loop
M11251054500	N/A 206550	N/A 4.50 Inch	N/A 1.125 Inch	N/A 1.125 Inch	N/A 1.125 Inch	N/A 0.105 Inch	N/A 4.50 Inch	N/A 7.3 lbs/in	N/A 3.40 Pound	N/A Full Twist Loop
M11251055000	N/A 206551	N/A 5.00 Inch	N/A 1.125 Inch	N/A 1.125 Inch	N/A 1.125 Inch	N/A 0.105 Inch	N/A 5.00 Inch	N/A 6.0 lbs/in	N/A 3.40 Pound	N/A Full Twist Loop
M11251055500	N/A 206552	N/A 5.50 Inch	N/A 1.125 Inch	N/A 1.125 Inch	N/A 1.125 Inch	N/A 0.105 Inch	N/A 5.50 Inch	N/A 5.1 lbs/in	N/A 3.40 Pound	N/A Full Twist Loop
M11251056000	N/A 206553	N/A 6.00 Inch	N/A 1.125 Inch	N/A 1.125 Inch	N/A 1.125 Inch	N/A 0.105 Inch	N/A 6.00 Inch	N/A 4.5 lbs/in	N/A 3.40 Pound	N/A Full Twist Loop
M11251056500	N/A 206554	N/A 6.50 Inch	N/A 1.125 Inch	N/A 1.125 Inch	N/A 1.125 Inch	N/A 0.105 Inch	N/A 6.50 Inch	N/A 3.9 lbs/in	N/A 3.40 Pound	N/A Full Twist Loop
M11251057000	N/A 206555	N/A 7.00 Inch	N/A 1.125 Inch	N/A 1.125 Inch	N/A 1.125 Inch	N/A 0.105 Inch	N/A 7.00 Inch	N/A 3.5 lbs/in	N/A 3.40 Pound	N/A Full Twist Loop
M11251253000	N/A 206556	N/A 3.000 Inch	N/A 1.125 Inch	N/A 1.125 Inch	N/A 1.125 Inch	N/A 0.125 Inch	N/A 3.00 Inch	N/A 46.2 lbs/in	N/A 5.51 Pound	N/A Full Twist Loop
M11251253500	N/A 206557	N/A 3.500 Inch	N/A 1.125 Inch	N/A 1.125 Inch	N/A 1.125 Inch	N/A 0.125 Inch	N/A 3.50 Inch	N/A 30.3 lbs/in	N/A 5.51 Pound	N/A Full Twist Loop
M11251254000	N/A 206558	N/A 4.000 Inch	N/A 1.125 Inch	N/A 1.125 Inch	N/A 1.125 Inch	N/A 0.125 Inch	N/A 4.00 Inch	N/A 22.5 lbs/in	N/A 5.51 Pound	N/A Full Twist Loop
M11251254500	N/A 206559	N/A 4.50 Inch	N/A 1.125 Inch	N/A 1.125 Inch	N/A 1.125 Inch	N/A 0.125 Inch	N/A 4.50 Inch	N/A 17.9 lbs/in	N/A 5.51 Pound	N/A Full Twist Loop
M11251255000	N/A 206560	N/A 5.00 Inch	N/A 1.125 Inch	N/A 1.125 Inch	N/A 1.125 Inch	N/A 0.125 Inch	N/A 5.00 Inch	N/A 14.9 lbs/in	N/A 5.51 Pound	N/A Full Twist Loop
M11251255500	N/A 206561	N/A 5.50 Inch	N/A 1.125 Inch	N/A 1.125 Inch	N/A 1.125 Inch	N/A 0.125 Inch	N/A 5.50 Inch	N/A 12.7 lbs/in	N/A 5.51 Pound	N/A Full Twist Loop
M11251256000	N/A 206562	N/A 6.00 Inch	N/A 1.125 Inch	N/A 1.125 Inch	N/A 1.125 Inch	N/A 0.125 Inch	N/A 6.00 Inch	N/A 11.1 lbs/in	N/A 5.51 Pound	N/A Full Twist Loop
M11251256500	N/A 206563	N/A 6.50 Inch	N/A 1.125 Inch	N/A 1.125 Inch	N/A 1.125 Inch	N/A 0.125 Inch	N/A 6.50 Inch	N/A 9.9 lbs/in	N/A 5.51 Pound	N/A Full Twist Loop
M11251257000	N/A 206564	N/A 7.00 Inch	N/A 1.125 Inch	N/A 1.125 Inch	N/A 1.125 Inch	N/A 0.125 Inch	N/A 7.00 Inch	N/A 8.9 lbs/in	N/A 5.51 Pound	N/A Full Twist Loop
M12500953500	N/A 206565	N/A 3.500 Inch	N/A 1.250 Inch	N/A 1.250 Inch	N/A 1.250 Inch	N/A 0.095 Inch	N/A 3.50 Inch	N/A 6.7 lbs/in	N/A 2.33 Pound	N/A Full Twist Loop
M12500954000	N/A 206566	N/A 4.000 Inch	N/A 1.250 Inch	N/A 1.250 Inch	N/A 1.250 Inch	N/A 0.095 Inch	N/A 4.00 Inch	N/A 4.6 lbs/in	N/A 2.33 Pound	N/A Full Twist Loop
M12500954500	N/A 206567	N/A 4.50 Inch	N/A 1.250 Inch	N/A 1.250 Inch	N/A 1.250 Inch	N/A 0.095 Inch	N/A 4.50 Inch	N/A 3.5 lbs/in	N/A 2.33 Pound	N/A Full Twist Loop
M12500955000	N/A 206568	N/A 5.00 Inch	N/A 1.250 Inch	N/A 1.250 Inch	N/A 1.250 Inch	N/A 0.095 Inch	N/A 5.00 Inch	N/A 2.8 lbs/in	N/A 2.33 Pound	N/A Full Twist Loop
M12500955500	N/A 206569	N/A 5.50 Inch	N/A 1.250 Inch	N/A 1.250 Inch	N/A 1.250 Inch	N/A 0.095 Inch	N/A 5.50 Inch	N/A 2.3 lbs/in	N/A 2.33 Pound	N/A Full Twist Loop
M12500956000	N/A 206570	N/A 6.00 Inch	N/A 1.250 Inch	N/A 1.250 Inch	N/A 1.250 Inch	N/A 0.095 Inch	N/A 6.00 Inch	N/A 2.0 lbs/in	N/A 2.33 Pound	N/A Full Twist Loop
M12500956500	N/A 206571	N/A 6.50 Inch	N/A 1.250 Inch	N/A 1.250 Inch	N/A 1.250 Inch	N/A 0.095 Inch	N/A 6.50 Inch	N/A 1.8 lbs/in	N/A 2.33 Pound	N/A Full Twist Loop
M12500957500	N/A 206572	N/A 7.50 Inch	N/A 1.250 Inch	N/A 1.250 Inch	N/A 1.250 Inch	N/A 0.095 Inch	N/A 7.50 Inch	N/A 1.4 lbs/in	N/A 2.33 Pound	N/A Full Twist Loop
M12501153500	N/A 206573	N/A 3.500 Inch	N/A 1.250 Inch	N/A 1.250 Inch	N/A 1.250 Inch	N/A 0.115 Inch	N/A 3.50 Inch	N/A 17.3 lbs/in	N/A 3.96 Pound	N/A Full Twist Loop

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No Preference
0.007
0.008
0.009
0.010
0.011
0.012
0.013
0.014
0.016
0.018
0.020
0.022
0.024
0.026
0.029
0.031
0.034
0.037
0.039
0.041
0.045
0.049
0.055
0.058
0.063
0.069
0.075
0.085
0.095
0.105
0.115
0.125
0.135
0.148
0.177
0.207

No Preference
0.25
0.31
0.38
0.44
0.50
0.62
0.75
0.87
0.88
1.00
1.12
1.25
1.37
1.50
1.75
10.00
2.00
2.25
2.50
2.75
3.00
3.25
3.50
4.00
4.50
4.75
5.00
5.50
6.00
6.50
7.00
7.50
8.00
9.00

No Preference
0.1
0.138
0.2
0.24
0.3
0.4
0.5
0.6
0.7
0.8
0.9
1.0
1.1
1.2
1.3
1.4
1.5
1.6
1.7
1.8
1.9
10.0
10.1
10.2
10.4
10.5
10.6
10.7
10.8
10.9
100.2
102.7
107.7
11.0
11.1
11.2
11.3
11.4
11.5
11.6
11.8
11.9
115.5
119.8
12.0
12.1
12.2
12.4
12.5
12.7
12.8
12.9
123.9
13.0
13.1
13.2
13.4
13.5
13.6
13.7
13.8
134.1
14.0
14.1
14.2
14.3
14.4
14.5
14.6
14.7
14.8
14.9
143.8
15.0
15.1
15.2
15.3
15.4
15.5
15.6
15.9
151.1
159.3
16.0
16.2
16.4
16.5
16.7
17.0
17.1
17.2
17.3
17.5
17.8
17.9
179.7
18.0
18.1
18.2
18.3
18.7
18.9
19.0
19.2
19.3
19.5
19.6
19.7
19.8
2.0
2.1
2.2
2.3
2.4
2.5
2.6
2.7
2.8
2.9
20.1
20.3
20.4
20.7
20.8
202.8
21.1
21.3
21.5
21.6
21.8
22.0
22.1
22.4
22.5
22.8
23.2
23.3
23.4
23.5
23.8
23.9
239.6
24.1
24.2
24.3
24.4
24.5
24.7
24.8
24.9
25.0
25.1
25.4
25.5
26.2
26.3
26.5
26.9
27.1
27.2
27.3
27.7
27.8
28.2
28.4
28.5
28.7
28.9
29.0
29.1
29.2
29.3
29.7
3.0
3.1
3.2
3.3
3.4
3.5
3.6
3.7
3.8
3.9
30.2
30.3
30.6
30.7
31.0
31.2
31.3
32.0
32.1
32.2
32.7
33.3
33.8
33.9
34.0
34.2
34.3
34.6
35.0
35.1
35.3
36.0
36.6
37.4
37.8
38.2
38.5
38.6
38.8
39.0
39.5
4.0
4.1
4.2
4.3
4.4
4.5
4.6
4.7
4.8
4.9
40.9
41.0
41.1
43.5
43.7
43.9
44.2
44.3
44.7
45.2
45.9
46.2
46.5
46.9
47.9
49.4
49.6
5.0
5.1
5.2
5.3
5.4
5.5
5.6
5.7
5.8
5.9
50.4
50.7
52.1
52.3
52.4
52.5
52.7
54.3
54.7
54.8
55.3
56.6
56.7
58.5
58.7
59.4
59.5
59.9
6.0
6.1
6.2
6.3
6.4
6.5
6.6
6.7
6.8
6.9
60.4
60.9
61.8
63.2
63.3
64.6
65.2
65.3
65.5
69.7
7.0
7.1
7.2
7.3
7.4
7.5
7.6
7.7
7.8
7.9
71.9
72.4
74.0
75.5
76.0
76.5
77.7
79.9
8.0
8.1
8.2
8.3
8.4
8.5
8.6
8.7
8.8
8.9
80.2
84.5
84.6
87.3
89.3
9.0
9.2
9.3
9.4
9.5
9.6
9.7
9.8
9.9
92.9
93.3
98.4