COIL SPRINGS

Type Features Type Size
(outer diameter)
Full length Maximum
deflection
Load N
{kgf}
Catalogue No. min. max. min. max. min. max.
Round wire coil springs

●The spring constant is fixed for each diameter. (Load capacity varies depending on the full length.)
WY φ3 φ16 5 70 75%
(1 million shots)
0.38
{0.04}
10.3
{1.05}
WR φ3 φ27 5 90 60%
(1 million shots)
0.9
{0.09}
23.5
{2.4}
WF φ3 φ27 5 90 45%
(1 million shots)
1.1
{0.11}
35.3
{3.6}
WL φ2 φ27 5 100 40%
(1 million shots)
0.98
{0.1}
117.7
{12.0}
WT φ3 φ27 5 80 40%
(1 million shots)
2.9
{0.3}
125.5
{12.8}
WM φ3 φ27 5 100 35%
(1 million shots)
3.4
{0.4}
171.6
{17.5}
WH φ4 φ27 5 100 30%
(1 million shots)
4.9
{0.5}
441.3
{45.0}
WB φ3 φ27 5 100 25%
(1 million shots)
4.9
{0.5}
735.5
{75.0}
NWL
(Inner diameter reference)
φ5.5
(Inner dia.)
φ16.6
(Inner dia.)
30 60 40%
(1 million shots)
13.7
{1.4}
27.5
{2.8}
NWM
(Inner diameter reference)
φ5.5
(Inner dia.)
φ16.6
(Inner dia.)
30 60 32%
(1 million shots)
20.6
{2.1}
34.3
{3.5}
WP
(Long type)
φ11.5 φ17 100 500 70%
(1 million shots)
21.3
{2.2}
34.3
{3.5}

●Operating temperatures
The load capacities and other data listed in the catalogue are those measured at normal temperatures (40°C or below). If the service environment temperature exceeds the normal temperature range, the load capacity and durability count may decrease, although this varies depending on a variety of conditions.
The maximum operating environment temperature is 80°C. Although the heat resistance temperature of the spring wire material is higher than the operating temperature (120°C for round wires, 200°C for shaped wires), a significant diminishment in function is expected if the spring is used at a temperature above the maximum service environment temperature. This does not apply to stainless steel types (click here).

●Maximum allowable deflection
Do not use the springs at deflections exceeding the maximum allowable deflection. If used at higher deflections, the spring load capacity and durability will diminish, and in the worst case the spring may break.
If a round wire coil spring is used even once at a stroke exceeding the maximum allowable deflection, the L dimension will be shortened.

Type Features Type Size Outer dia.
(inner dia.)
Full length Maximum
deflection
Deflection
N {kgf}
Load Catalogue
No.
min. max. min. max. min. max.
Shaped wire coil springs High
deflection
type


●Load capacity is fixed for
each diameter.
Light

Heavy
SWY
φ11 φ42 20 300 65%
(1 million shots)
29.4
{3.0}
392.3
{40.0}
70%
(300,000 shots)
31.4
{3.2}
425.6
{43.4}
SWU
φ10.5 φ43 15 300 60%
(1 million shots)
68.6
{7.0}
588.4
{60.0}
65%
(300,000 shots)
73.9
{7.5}
637.4
{65.0}
SWR
φ10.5 φ50 15 400 50%
(1 million shots)
78.5
{8.0}
1323.9
{135.0}
55%
(300,000 shots)
87.2
{8.8}
1456.3
{148.5}
SWS
φ10.5 φ52 20 300 40%
(1 million shots)
87.2
{8.9}
1569.0
{160.0}
45%
(300,000 shots)
97.1
{9.9}
1765.2
{180.0}
Heavy-load type

●Load capacity is fixed for
each diameter.
SWC
φ6
(φ3)
φ30
(φ15)
15 200 50%
(1 million shots)
27
{2.8}
392
{40.0}
60%
(300,000 shots)
32
{3.3}
471
{48.0}
SWF
φ6
(φ3)
φ70
(φ38.5)
10 500 40%
(1 million shots)
47
{4.8}
3136
{320}
50%
(300,000 shots)
59
{6.0}
3920
{400}
SWL
φ6
(φ3)
φ70
(φ38.5)
10 350 32%
(1 million shots)
63
{6.4}
4782
{488}
40%
(300,000 shots)
78
{8.0}
5978
{610}
SWM
φ6
(φ3)
φ70
(φ38.5)
10 350 25.6%
(1 million shots)
79
{8.0}
6664
{680}
32%
(300,000 shots)
98
{10}
8330
{850}
SWH
φ6
(φ3)
φ70
(φ38.5)
10 350 19.2%
(1 million shots)
110
{11}
10046
{1024}
24%
(300,000 shots)
137
{14}
12557
{1280}
SWB
φ6
(φ3)
φ70
(φ38.5)
10 350 16%
(1 million shots)
142
{14}
13655
{1392}
20%
(300,000 shots)
177
{18}
17069
{1740}
SWG
φ10
(φ5)
φ50
(φ25)
15 200 16%
(1 million shots)
392
{40}
9807
{1000}
20%
(300,000 shots)
490
{50}
12258
{1250}
SWZ
φ10
(φ5)
φ50
(φ25)
25 200 10.5%
(1 million shots)
416
{42}
12959
{1321}
13%
(300,000 shots)
515
{53}
16045
{1636}
SWV
φ10
(φ5)
φ50
(φ25)
30 200 10.5%
(1 million shots)
644
{66}
14904
{1228}
13%
(300,000 shots)
797
{81}
18452
{1882}
High speed type - SWX φ20
(φ9.5)
φ40
(φ20.5)
25 100 10%
(10 million shots)
1275
{130}
5198
{530}
Corrosion
heat
resistant
type
- SWUF
SWUL
SWUM
SWUH
φ10
(φ5)
φ30
(φ15)
20 60 click here

●Coating of shaped wire coil springs
MISUMI shaped wire coil springs are coated for identification and to prevent corrosion.
(SWX and SWU□ are not coated.)

●Spring load calculation method
Load=Spring constant×Deflection
N=N/mm × Fmm (SI unit)
kgf=kgf/mm × Fmm
(kgf=N×0.101972)

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