Load ± 10% Squareness 2° or less Free length L 50 or less ± 0.5mm 55 or more ± 1% Coil direction Right
0 ※1
D
－ 0.7
Light
Load guide
Heavy
＋ 0.1 ＋ 0.7
d
COIL SPRINGS –EXTRA HEAVY LOAD SWB–
S W C
S W F
S W L
S W M
S W H
S W B
S W G
※ 1 D7 0 is 0
－ 1.0
Spring constant N/mm{kgf/mm}
Spring constant N/mm{kgf/mm}
Spring constant N/mm{kgf/mm}
Spring constant N/mm{kgf/mm}
F = L × 16% F = L × 18% F = L × 20% Part Number Fmm Load N{kgf} Fmm Load N{kgf} Fmm Load N{kgf} Type D–L
F = L × 16% F = L × 18% F = L × 20% Part Number Fmm Load N{kgf} Fmm Load N{kgf} Fmm Load N{kgf} Type D–L
F = L × 16% F = L × 18% F = L × 20% Part Number Fmm Load N{kgf} Fmm Load N{kgf} Fmm Load N{kgf} Type D–L
F = L × 16% F = L × 18% F = L × 20% Part Number Fmm Load N{kgf} Fmm Load N{kgf} Fmm Load N{kgf} Type D–L
D d L
D d L
D d L
D d L
SWB6 –15
SWB16–20
SWB40–40
SWB25–25
15 59.0{ 6.0} 2.4 20 44.3{ 4.5} 3.2 25 35.4{ 3.6} 4.0 30 29.5{ 3.0} 4.8 35 25.3{ 2.6} 5.6 40 22.1{ 2.3} 6.4 45 19.7{ 2.0} 7.2 50 17.7{ 1.8} 8.0 55 16.1{ 1.6} 8.8 60 14.8{ 1.5} 9.6 10 162 {16.5} 1.6 15 108 {11.0} 2.4 20 80.8{ 8.2} 3.2 25 64.6{ 6.6} 4.0 30 53.8{ 5.5} 4.8 35 46.1{ 4.7} 5.6 40 40.4{ 4.1} 6.4 45 35.9{ 3.7} 7.2 50 32.3{ 3.3} 8.0 55 29.4{ 3.0} 8.8 60 26.9{ 2.7} 9.6 65 24.8{ 2.5} 10.4 70 23.1{ 2.4} 11.2 75 21.5{ 2.2} 12.0 80 20.2{ 2.1} 12.8 10 221 {22.5} 1.6 15 147 {15.0} 2.4 20 110 {11.2} 3.2 25 88.2{ 9.0} 4.0 30 73.5{ 7.5} 4.8 35 63.0{ 6.4} 5.6 40 55.1{ 5.6} 6.4 45 49.0{ 5.0} 7.2 50 44.1{ 4.5} 8.0 55 40.1{ 4.1} 8.8 60 36.8{ 3.7} 9.6 65 33.9{ 3.5} 10.4 70 31.5{ 3.2} 11.2 75 29.4{ 3.0} 12.0 80 27.6{ 2.8} 12.8 90 24.5{ 2.5} 14.4 15 190 {19.3} 2.4 20 142 {14.5} 3.2 25 114 {11.6} 4.0 30 94.8{ 9.7} 4.8 35 81.3{ 8.3} 5.6 40 71.1{ 7.3} 6.4 45 63.2{ 6.4} 7.2 50 56.9{ 5.8} 8.0 55 51.7{ 5.3} 8.8 60 47.4{ 4.8} 9.6 65 43.8{ 4.5} 10.4 70 40.6{ 4.1} 11.2 75 37.9{ 3.9} 12.0 80 35.6{ 3.6} 12.8 90 31.6{ 3.2} 14.4 20 184 {18.8} 3.2 25 147 {15.0} 4.0 30 123 {12.5} 4.8 35 105 {10.7} 5.6 40 92.0{ 9.4} 6.4 45 81.8{ 8.3} 7.2 50 73.6{ 7.5} 8.0 55 66.9{ 6.8} 8.8 60 61.3{ 6.3} 9.6 65 56.6{ 5.8} 10.4 70 52.6{ 5.4} 11.2 75 49.1{ 5.0} 12.0 80 46.0{ 4.7} 12.8 90 40.9{ 4.2} 14.4 100 36.8{ 3.8} 16.0
20 245 {25.0} 3.2 25 196 {20.0} 4.0 30 163 {16.7} 4.8 35 140 {14.3} 5.6 40 123 {12.5} 6.4 45 109 {11.1} 7.2 50 98.0{10.0} 8.0 55 89.1{ 9.1} 8.8 60 81.7{ 8.3} 9.6 65 75.4{ 7.7} 10.4 70 70.0{ 7.1} 11.2 75 65.3{ 6.7} 12.0 80 61.3{ 6.3} 12.8 90 54.4{ 5.6} 14.4 100 49.0{ 5.0} 16.0 20 306 {31.2} 3.2 25 245 {25.0} 4.0 30 204 {20.8} 4.8 35 175 {17.8} 5.6 40 153 {15.6} 6.4 45 136 {13.9} 7.2 50 123 {12.5} 8.0 55 111 {11.4} 8.8 60 102 {10.4} 9.6 65 94.2{ 9.6} 10.4 70 87.5{ 8.9} 11.2 75 81.7{ 8.3} 12.0 80 76.6{ 7.8} 12.8 90 68.1{ 6.9} 14.4 100 61.3{ 6.2} 16.0 20 392 {40.0} 3.2 25 314 {32.0} 4.0 30 261 {26.6} 4.8 35 224 {22.8} 5.6 40 196 {20.0} 6.4 45 174 {17.8} 7.2 50 157 {16.0} 8.0 55 143 {14.5} 8.8 60 131 {13.3} 9.6 65 121 {12.3} 10.4 70 112 {11.4} 11.2 75 105 {10.7} 12.0 80 98.0{10.0} 12.8 90 87.1{ 8.9} 14.4 100 78.4{ 8.0} 16.0 125 62.7{ 6.4} 20.0 150 52.3{ 5.3} 24.0 25 382 {39.0} 4.0 30 319 {32.5} 4.8 35 273 {27.9} 5.6 40 239 {24.4} 6.4 45 212 {21.7} 7.2 50 191 {19.5} 8.0 55 174 {17.7} 8.8 60 159 {16.2} 9.6 65 147 {15.0} 10.4 70 137 {13.9} 11.2 75 127 {13.0} 12.0 80 120 {12.2} 12.8 90 106 {10.8} 14.4 100 95.6{ 9.8} 16.0 125 76.5{ 7.8} 20.0 150 63.7{ 6.5} 24.0
40 784{ 79.9} 6.4 45 697{ 71.1} 7.2 50 627{ 64.0} 8.0 55 570{ 58.1} 8.8 60 523{ 53.3} 9.6 65 482{ 49.2} 10.4 70 448{ 45.7} 11.2 75 418{ 42.6} 12.0 80 392{ 40.0} 12.8 90 348{ 35.5} 14.4 100 314{ 32.0} 16.0 125 251{ 25.6} 20.0 150 209{ 21.3} 24.0 175 179{ 18.3} 28.0 200 157{ 16.0} 32.0 225 139{ 14.2} 36.0 250 125{ 12.8} 40.0 275 114{ 11.6} 44.0 300 105{ 10.7} 48.0 50 980 {100.0} 8.0 55 891{ 90.9} 8.8 60 817{ 83.3} 9.6 65 754{ 76.9} 10.4 70 700{ 71.4} 11.2 75 653{ 66.7} 12.0 80 613{ 62.5} 12.8 90 544{ 55.6} 14.4 100 490{ 50.0} 16.0 125 392{ 40.0} 20.0 150 327{ 33.3} 24.0 175 280{ 28.6} 28.0 200 245{ 25.0} 32.0 225 218{ 22.2} 36.0 250 196{ 20.0} 40.0 275 178{ 18.2} 44.0 300 163{ 16.7} 48.0 350 140{ 14.3} 56.0 60 1176 {120.0} 9.6 70 1008 {102.9} 11.2 80 882{ 90.0} 12.8 90 784{ 80.0} 14.4 100 706{ 72.0} 16.0 125 564{ 57.6} 20.0 150 470{ 48.0} 24.0 175 403{ 41.1} 28.0 200 353{ 36.0} 32.0 225 314{ 32.0} 36.0 250 282{ 28.8} 40.0 275 257{ 26.2} 44.0 300 235{ 24.0} 48.0 350 202{ 20.6} 56.0 70 1219 {124.3} 11.2 80 1067 {108.8} 12.8 90 948{ 96.7} 14.4 100 853{ 87.0} 16.0 125 683{ 69.6} 20.0 150 569{ 58.0} 24.0 175 488{ 49.7} 28.0 200 427{ 43.5} 32.0 250 341{ 34.8} 40.0 300 284{ 29.0} 48.0 350 244{ 24.9} 56.0
3.6 4.5 5.4 6.3 7.2 8.1 9.0 9.9
4.0 5.0 6.0 7.0 8.0 9.0
25 481 {49.0} 4.0 30 400 {40.8} 4.8 35 343 {35.0} 5.6 40 300 {30.6} 6.4 45 267 {27.2} 7.2 50 240 {24.5} 8.0 55 218 {22.3} 8.8 60 200 {20.4} 9.6 65 185 {18.8} 10.4 70 172 {17.5} 11.2 75 160 {16.3} 12.0 80 150 {15.3} 12.8 90 133 {13.6} 14.4 100 120 {12.2} 16.0 125 96.1{ 9.8} 20.0 150 80.1{ 8.2} 24.0 175 68.6{ 7.0} 28.0 25 569 {58.0} 4.0 30 474 {48.3} 4.8 35 406 {41.4} 5.6 40 355 {36.2} 6.4 45 316 {32.2} 7.2 50 284 {29.0} 8.0 55 259 {26.4} 8.8 60 237 {24.2} 9.6 65 219 {22.3} 10.4 70 203 {20.7} 11.2 75 190 {19.3} 12.0 80 178 {18.1} 12.8 90 158 {16.1} 14.4 100 142 {14.5} 16.0 125 114 {11.6} 20.0 150 94.8{ 9.7} 24.0 175 81.3{ 8.3} 28.0 25 706 {72.0} 4.0 30 588 {60.0} 4.8 35 504 {51.4} 5.6 40 441 {45.0} 6.4 45 392 {40.0} 7.2 50 353 {36.0} 8.0 55 321 {32.7} 8.8 60 294 {30.0} 9.6 65 272 {27.7} 10.4 70 252 {25.7} 11.2 75 235 {24.0} 12.0 80 221 {22.5} 12.8 90 196 {20.0} 14.4 100 177 {18.0} 16.0 125 141 {14.4} 20.0 150 118 {12.0} 24.0 175 101 {10.3} 28.0 200 88.3{ 9.0} 32.0 40 600 {61.2} 6.4 45 534 {54.4} 7.2 50 480 {49.0} 8.0 55 437 {44.5} 8.8 60 400 {40.8} 9.6 65 369 {37.7} 10.4 70 343 {35.0} 11.2 75 320 {32.6} 12.0 80 300 {30.6} 12.8 90 267 {27.2} 14.4 100 240 {24.5} 16.0 125 192 {19.6} 20.0 150 160 {16.3} 24.0 175 137 {14.0} 28.0 200 120 {12.2} 32.0
4.5 5.4 6.3 7.2 8.1 9.0 9.9
5.0 6.0 7.0 8.0 9.0
2.7 3.6 4.5 5.4 6.3 7.2 8.1 9.0 9.9 1.8 2.7 3.6 4.5 5.4 6.3 7.2 8.1 9.0 9.9
3.0 4.0 5.0 6.0 7.0 8.0 9.0
7.2 8.1 9.0 9.9
8.0 9.0
30 35 40 45 50 55 60 65 70 75 80 90
45 50 55 60 65 70 75 80 90
25 30 35 40 45 50 55 60 65 70 75 80 90 25 30 35 40 45 50 55 60 65 70 75 80 90 25 30 35 40 45 50 55 60 65 70 75 80 90
20 25 30 35 40 45 50 55 60 15 20 25 30 35 40 45 50 55 60 65 70 75 80 15 20 25 30 35 40 45 50 55 60 65 70 75 80 90 20 25 30 35 40 45 50 55 60 65 70 75 80 90 25 30 35 40 45 50 55 60 65 70 75 80 90
10.0 11.0 12.0 13.0 14.0 15.0 16.0 18.0 20.0 25.0 30.0 35.0 40.0 45.0 50.0 55.0 60.0 10.0 11.0 12.0 13.0 14.0 15.0 16.0 18.0 20.0 25.0 30.0 35.0 40.0 45.0 50.0 55.0 60.0 70.0 12.0 14.0 16.0 18.0 20.0 25.0 30.0 35.0 40.0 45.0 50.0 55.0 60.0 70.0 14.0 16.0 18.0 20.0 25.0 30.0 35.0 40.0 50.0 60.0 70.0
142 {14}
159 {16}
177 {18}
10.8 11.7 12.6 13.5 14.4 16.2 18.0 22.5 27.0 31.5 36.0 40.5 45.0 49.5 54.0
6 3
10.0 11.0 12.0 13.0 14.0 15.0 16.0 18.0 20.0 25.0 30.0 35.0
10.0 11.0 12.0 13.0 14.0 15.0 16.0 18.0 20.0
784 {80}
882 {90}
980 {100}
16 8
10.0 11.0 12.0
10.8 11.7 12.6 13.5 14.4 16.2 18.0 22.5 27.0 31.5
1922 {196}
2162 {220}
2403 {245}
10.8 11.7 12.6 13.5 14.4 16.2 18.0
25 12.5
5018 {512}
5645 {576}
6272 {640}
10.8
40 20
SWB8 –10
100 125 150 175 200 225 250 275 300
2.0 3.0 4.0 5.0 6.0 7.0 8.0 9.0
100 125 150 175
100
SWB18–20
3.6 4.5 5.4 6.3 7.2 8.1 9.0 9.9
4.0 5.0 6.0 7.0 8.0 9.0
258 {26}
291 {30}
323 {33}
SWB27–25
8 4
4.5 5.4 6.3 7.2 8.1 9.0 9.9
5.0 6.0 7.0 8.0 9.0
30 35 40 45 50 55 60 65 70 75 80 90
10.0 11.0 12.0 13.0 14.0 15.0 16.0
SWB50–50
9.0 9.9
55 60 65 70 75 80 90
10.8 11.7 12.6 13.5 14.4
10.8 11.7 12.6 13.5 14.4 16.2 18.0 22.5 27.0 31.5 36.0 40.5 45.0 49.5 54.0 63.0 10.8 12.6 14.4 16.2 18.0 22.5 27.0 31.5 36.0 40.5 45.0 49.5 54.0 63.0 12.6 14.4 16.2 18.0 22.5 27.0 31.5 36.0 45.0 54.0 63.0
10.0 11.0 12.0 13.0 14.0 15.0 16.0 18.0 20.0
980 {100}
1103 {113}
1225 {125}
18 9
10.0 11.0 12.0 13.0 14.0 15.0 16.0 18.0 20.0 25.0 30.0 35.0
10.8 11.7 12.6 13.5 14.4 16.2 18.0
10.8 11.7 12.6 13.5 14.4 16.2 18.0 22.5 27.0 31.5
2275 {232}
2560 {261}
2844 {290}
SWB10–10
27 13.5
1.8 2.7 3.6 4.5 5.4 6.3 7.2 8.1 9.0 9.9
2.0 3.0 4.0 5.0 6.0 7.0 8.0 9.0
7840 {800}
8820 {900}
9800 {1000}
100 125 150 175 200 225 250 275 300 350
50 25
100
SWB20–20
100 125 150 175
3.6 4.5 5.4 6.3 7.2 8.1 9.0 9.9
4.0 5.0 6.0 7.0 8.0 9.0
353 {36}
397 {41}
441 {45}
10 5
10.0 11.0 12.0 13.0 14.0 15.0 16.0 18.0
SWB30–25
4.5 5.4 6.3 7.2 8.1 9.0 9.9
5.0 6.0 7.0 8.0 9.0
30 35 40 45 50 55 60 65 70 75 80 90
10.8 11.7 12.6 13.5 14.4 16.2
10.0 11.0 12.0 13.0 14.0 15.0 16.0 18.0 20.0 25.0 30.0
SWB60–60
1254 {128}
1411 {144}
1568 {160}
70 80 90
20 10
10.8 11.7 12.6 13.5 14.4 16.2 18.0 22.5 27.0
10.0 11.0 12.0 13.0 14.0 15.0 16.0 18.0 20.0 25.0 30.0 35.0 40.0
SWB12–15
100 125 150 175 200 225 250 275 300 350
10.8 11.7 12.6 13.5 14.4 16.2 18.0 22.5 27.0 31.5 36.0
2.7 3.6 4.5 5.4 6.3 7.2 8.1 9.0 9.9
3.0 4.0 5.0 6.0 7.0 8.0 9.0
2824 {288}
3177 {324}
3530 {360}
30 15
12701 {1296}
14112 {1440}
11290 {1152}
60 30
100 125 150
SWB22–25
100 125 150 175 200
4.5 5.4 6.3 7.2 8.1 9.0 9.9
5.0 6.0 7.0 8.0 9.0
455 {46}
512 {52}
569 {58}
30 35 40 45 50 55 60 65 70 75 80 90
12 6
10.0 11.0 12.0 13.0 14.0 15.0 16.0 18.0
10.8 11.7 12.6 13.5 14.4 16.2
SWB70–70
SWB35–40
80 90
10.0 11.0 12.0 13.0 14.0 15.0 16.0 18.0 20.0 25.0 30.0
7.2 8.1 9.0 9.9
8.0 9.0
45 50 55 60 65 70 75 80 90
1530 {156}
1721 {175}
1912 {195}
10.0 11.0 12.0 13.0 14.0 15.0 16.0 18.0 20.0 25.0 30.0 35.0 40.0
10.8 11.7 12.6 13.5 14.4 16.2 18.0 22.5 27.0
100 125 150 175 200 250 300 350
22 11
13655 {1392}
15362 {1567}
17069 {1740}
SWB14–20
10.8 11.7 12.6 13.5 14.4 16.2 18.0 22.5 27.0 31.5 36.0
3.6 4.5 5.4 6.3 7.2 8.1 9.0 9.9
4.0 5.0 6.0 7.0 8.0 9.0
70 38.5
3842 {392}
4322 {441}
4802 {490}
35 17.5
100 125 150
100 125 150 175 200
10.0 11.0 12.0 13.0 14.0 15.0 16.0 18.0 20.0
Operation frequency 1 million times 500,000 times 300,000 times
589 {60}
662 {68}
736 {75}
14 7
Operation frequency 1 million times 500,000 times 300,000 times
10.8 11.7 12.6 13.5 14.4 16.2 18.0
(NT) – Part Number NT – SWB30–60
Quotation
Part Number SWB20–80
Alterations
Order
Operation frequency 1 million times 500,000 times 300,000 times
Alterations Code
Spec.
M Material Oil tempered wire for spring ● Load calculation method:
Quotation
Delivery
Load = Spring constant × Deflection
Paint peeling process d P.1147 Peel the coating by shot peening the coil springs. e Since the springs which have undergone the painting peeling are easy to rust, be careful in handling. Rusting of spring will lead to premature damaging. e Compared to painted springs, there may be some dispersions in terms of load, etc. depending on the lot.
(International unit) N = N/mm × Fmm kgf = kgf/mm × Fmm (kgf = N × 0.101972)
100
Operation frequency 1 million times 500,000 times 300,000 times
NT
e Product guide d P.1139
e load graph d P.1141
e Instructions and notes for coil springs d P.1142 e For information on the D dimension and the counterbore hole, and also the d dimension and the shaft d P.1142
1179
1180
No painting
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