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Round Wire Springs -Spring Constant 1.5~3.9 N/mm-

・Materials
[ M ] Material: Spring Steel (ASTM A228)

Specifications

Round Wire Springs -Spring Constant 1.5~3.9 N/mm-:Related Image
■WT: Fmax. (Allowable Deflection) = L x 40% (L x 35%)
dSolid LengthF
max.
Load
N{kgf}
max.
Part Number
Type D-L
0.31.7322.9{0.3}WT3-5*
0.4545.9{0.6}10*
0.458.7868.8{0.9}15*
0.458.78811.8{1.2}20*
0.514.51014.7{1.5}25*
0.42.722.9{0.3}WT4-5*
0.42.745.9{0.6}10*
0.56.568.8{0.9}15*
0.559.63811.8{1.2}20
0.559.631014.7{1.5}25
0.6151217.7{1.8}30
0.6151420.6{2.1}35
0.6522.11623.5{2.4}40
0.452.3623.9{0.4}WT5-5*
0.53.2547.8{0.8}10*
0.66.3611.8{1.2}15
0.66.3815.7{1.6}20
0.712.61019.6{2.0}25
0.712.61223.5{2.4}30
0.7517.31427.5{2.8}35
0.7517.31427.5{2.8}(40)
0.82415.830.9{3.2}(45)
0.82417.534.3{3.5}(50)
0.8532.319.337.8{3.9}(55)
0.8532.32141.2{4.2}(60)
0.853422.744.5{4.5}(65)
0.944.624.548.1{4.9}(70)
0.52.3823.9{0.4}WT6-5*
0.64.3547.8{0.8}10
0.64.35611.8{1.2}15
0.77.7815.7{1.6}20
0.77.71019.6{2.0}25
0.8141223.5{2.4}30
0.8141427.5{2.8}35
0.8518.71631.4{3.2}40
0.8518.71835.3{3.6}45
0.924.82039.2{4.0}50
0.924.81937.8{3.9}(55)
0.924.82141.2{4.2}(60)
0.926.122.744.5{4.5}(65)
14324.548.1{4.9}(70)
1432854.9{5.6}(80)

dSolid LengthF
max.
Load
N{kgf}
max.
Part Number
Type D-L
0.74.3847.8{0.8}WT8-10
0.86.8611.8{1.2}15
0.86.8815.7{1.6}20
0.86.81019.6{2.0}25
0.910.81223.5{2.4}30
0.910.81427.5{2.8}35
117.51631.4{3.2}40
117.51835.3{3.6}45
117.52039.2{4.0}50
1.127.52243.1{4.4}55
1.127.52447.1{4.8}60
1.127.52651.0{5.2}65
1.127.52854.9{5.6}70
1.2423262.8{6.4}80
0.855.5347.8{0.8}WT10-10
0.96.75611.8{1.2}15
0.96.75815.7{1.6}20
1101019.6{2.0}25
1101223.5{2.4}30
1101427.5{2.8}35
1101631.4{3.2}40
1.114.31835.3{3.6}45
1.114.32039.2{4.0}50
1.221.62243.1{4.4}55
1.221.62447.1{4.8}60
1.221.62651.0{5.2}65
1.332.52854.9{5.6}70
1.332.53262.8{6.4}80
16611.8{1.2}WT13-15
1.18.25815.7{1.6}20
1.18.251019.6{2.0}25
1.211.11223.5{2.4}30
1.211.11427.5{2.8}35
1.211.11631.4{3.2}40
1.211.11835.3{3.6}45
1.315.62039.2{4.0}50
1.315.62243.1{4.4}55
1.315.62447.1{4.8}60
1.4212651.0{5.2}65
1.4212854.9{5.6}70
1.4213262.8{6.4}80
1.27.5611.8{1.2}WT16-15
1.39.43815.7{1.6}20
1.412.61019.6{2.0}25
1.412.61223.5{2.4}30
1.412.61427.5{2.8}35
1.412.61631.4{3.2}40
1.622.41835.3{3.6}45
1.622.42039.2{4.0}50
1.622.42243.1{4.4}55
1.728.92447.1{4.8}60
1.728.92651.0{5.2}65
1.728.92854.9{5.6}70
1.728.93262.8{6.4}80

dSolid LengthF
max.
Load
N{kgf}
max.
Part Number
Type D-L
1.610.8831.4{3.2}WT18-20
1.713.61039.2{4.0}25
1.713.61247.1{4.8}30
1.713.61454.9{5.6}35
1.816.71662.8{6.4}40
1.920.51870.6{7.2}45
1.920.52078.5{8.0}50
2262286.3{8.8}55
2262494.1{9.6}60
22626102.0{10.4}65
22628109.8{11.2}70
2.131.532125.5{12.8}80
1.811.3831.4{3.2}WT22-20
1.811.31039.2{4.0}25
1.913.31247.1{4.8}30
1.913.31454.9{5.6}35
2161662.8{6.4}40
2.119.51870.6{7.2}45
2.119.52078.5{8.0}50
2.328.22286.3{8.8}55
2.328.22494.1{9.6}60
2.328.226102.0{10.4}65
2.328.228109.8{11.2}70
2.433.632125.5{12.8}80
2.113.21247.1{4.8}WT27-30
2.317.91454.9{5.6}35
2.317.91662.8{6.4}40
2.420.41870.6{7.2}45
2.628.62078.5{8.0}50
2.628.62286.3{8.8}55
2.628.62494.1{9.6}60
2.628.626102.0{10.4}65
2.839.228109.8{11.2}70
2.839.232125.5{12.8}80
- Load Calculation Method: Load = Spring Constant x Deflection
    (Int'l Unit)N=N/mmxFmm
kgf=kgf/mmxFmm
(kgf=Nx0.101972)

[ ! ]Allowable Deflection of (L) Size
WT5-40Fmax.= L x 35%
WT5-45Fmax.= L x 35%
WT5-50Fmax.= L x 35%
WT5-55Fmax.= L x 35%
WT5-60Fmax.= L x 35%
WT5-65Fmax.= L x 35%
WT5-70Fmax.= L x 35%
WT6-55Fmax.= L x 35%
WT6-60Fmax.= L x 35%
WT6-65Fmax.= L x 35%
WT6-70Fmax.= L x 35%
WT6-80Fmax.= L x 35%

[ ! ]Both ends of * marked WT Type springs are not ground.
[ ! ]The values of solid length are for reference only.
 There may be some variations depending on the lot.
[ ! ]Operation frequency: One million times
[ ! ]Product Overview >> Click here
[ ! ]How to use coil springs and precautions >> Click here
■Spring Constant [ ! ]D12 and 14 for WY Type and D12,14 and 20 for WT Type are not available.
 TypeWYWRWFWLWTWMWHWB
D 
2          0.5{0.05}             
3 N/mm
0.1
{kgf/mm} {0.01}
  N/mm 0.3
{kgf/mm} {0.03}
  N/mm 0.5
{kgf/mm} {0.05}
  N/mm 1.0
{kgf/mm} {0.1}
  1.5
{0.15}
  2.0
{0.2}
     3.9{0.4} 
4             2.9{0.3}  4.9{0.5} 
5         N/mm 2.0
{kgf/mm} {0.2}
  N/mm 2.9
{kgf/mm} {0.3}
  N/mm 5.9
{kgf/mm} {0.6}
  N/mm 9.8
{kgf/mm} {1.0}
 
6                
8                
10 N/mm 0.2
{kgf/mm} {0.02}
               
12                
13             N/mm 9.8
{kgf/mm} {1.0}
  N/mm 19.6
{kgf/mm} {2.0}
 
14                
16                
18    N/mm 0.5
{kgf/mm} {0.05}
  N/mm 1.0
{kgf/mm} {0.1}
  N/mm 2.9
{kgf/mm} {0.3}
  N/mm 3.9
{kgf/mm} {0.4}
  N/mm 4.9
{kgf/mm} {0.5}
  N/mm 14.7
{kgf/mm} {1.5}
  29.4{3.0} 
20                  
22                N/mm 29.4
{kgf/mm} {3.0}
 
27                 
Fmax.F=Lx75%F=Lx60%F=Lx45%F=Lx40%F=Lx40%F=Lx35%F=Lx30%F=Lx25%
■WM:Fmax. (Allowable Deflection) = L x 35%
dSolid LengthF
max.
Load
N{kgf}
max.
Part Number
Type D-L
0.352.51.83.4{0.4}WM3-5*
0.383.33.56.9{0.7}  10*
0.4575.310.3{1.1}  15*
0.511.5713.7{1.4}  20*
0.511.57.514.7{1.5}  (25)
0.5520.4917.7{1.8}  (30)
0.42.31.73.9{0.4}WM4-5*
0.453.43.56.9{0.7}  10*
0.55.15.210.8{1.1}  15*
0.557.7713.7{1.4}  20
0.611.78.717.7{1.8}  25
0.611.710.520.6{2.1}  30
0.6517.612.224.0{2.5}  35
0.6517.61223.5{2.4}  (40)
0.52.81.74.9{0.5}WM5-5*
0.64.23.59.8{1.0}  10
0.656.55.214.7{1.5}  15
0.656.5720.6{2.1}  20
0.79.18.725.5{2.6}  25
0.7512.710.530.4{3.1}  30
0.817.412.235.3{3.6}  35
0.8523.81441.2{4.2}  40
0.8523.815.846.1{4.7}  45
0.923.81543.5{4.5}  (50)
0.93016.549.0{5.0}  (55)
0.9301853.0{5.4}  (60)
0.93017.652.0{5.3}  (65)
0.93019.658.8{6.0}  (70)
0.552.81.74.9{0.5}WM6-5*
0.654.73.59.8{1.0}  10
0.7585.214.7{1.5}  15
0.758720.6{2.1}  20
0.8513.68.725.5{2.6}  25
0.8513.610.530.4{3.1}  30
0.91812.235.3{3.6}  35
0.9181441.2{4.2}  40
0.91815.846.1{4.7}  45
0.91817.551.0{5.2}  50
1.03119.255.9{5.7}  55
1.0311853.0{5.4}  (60)
1.03118.854.9{5.6}  (65)
1.147.32058.8{6.0}  (70)
1.148.422.465.9{6.7}  (80)
0.754.23.59.8{1.0}WM8-10
0.98.55.214.7{1.5}  15
0.98.5720.6{2.1}  20
0.98.58.725.5{2.6}  25
0.98.510.530.4{3.1}  30
1.01312.235.3{3.6}  35
1.0131441.2{4.2}  40
1.119.815.846.1{4.7}  45
1.119.817.551.0{5.2}  50
1.231.219.255.9{5.7}  55
1.231.22161.8{6.3}  60
1.231.222.764.7{6.6}  65
1.231.224.571.6{7.3}  70
1.344.22882.4{8.4}  80

dSolid LengthF
max.
Load
N{kgf}
max.
Part Number
Type D-L
0.95.23.59.8{1.0}WM10-10
1.07.75.214.7{1.5}  15
1.07.7720.6{2.1}  20
1.1118.725.5{2.6}  25
1.11110.530.4{3.1}  30
1.216.212.235.3{3.6}  35
1.216.21441.2{4.2}  40
1.322.115.846.1{4.7}  45
1.322.117.551.0{5.2}  50
1.322.119.255.9{5.7}  55
1.432.12161.8{6.3}  60
1.432.122.764.7{6.6}  65
1.432.124.571.6{7.3}  70
1.432.22882.4{8.4}  80
1.05.53.510.3{1.1}WM12-10
1.17.45.214.7{1.5}  15
1.17.4720.6{2.1}  20
1.17.48.725.5{2.6}  25
1.210.210.530.4{3.1}  30
1.210.212.235.3{3.6}  35
1.314.31441.2{4.2}  40
1.314.315.846.1{4.7}  45
1.314.317.551.0{5.2}  50
1.419.619.255.9{5.7}  55
1.419.62161.8{6.3}  60
1.526.322.764.7{6.6}  65
1.526.324.571.6{7.3}  70
1.636.82882.4{8.4}  80
1.053.510.3{1.1}WM13-10
1.28.45.214.7{1.5}  15
1.311.7720.6{2.1}  20
1.311.78.725.5{2.6}  25
1.414.510.530.4{3.1}  30
1.414.512.235.3{3.6}  35
1.414.51441.2{4.2}  40
1.414.515.846.1{4.7}  45
1.414.517.551.0{5.2}  50
1.522.519.255.9{5.7}  55
1.522.52161.8{6.3}  60
1.628.822.764.7{6.6}  65
1.628.824.571.6{7.3}  70
1.737.42882.4{8.4}  80
1.737.431.592.9{9.5}  90
1.27.55.214.7{1.5}WM14-15
1.39.8720.6{2.1}  20
1.413.38.725.5{2.6}  25
1.413.310.530.4{3.1}  30
1.413.312.235.3{3.6}  35
1.413.31441.2{4.2}  40
1.517.315.846.1{4.7}  45
1.517.317.551.0{5.2}  50
1.517.319.255.9{5.7}  55
1.623.22161.8{6.3}  60
1.623.222.764.7{6.6}  65
1.730.624.571.6{7.3}  70
1.730.62882.4{8.4}  80
1.839.631.592.7{9.5}  90

dSolid LengthF
max.
Load
N{kgf}
max.
Part Number
Type D-L
1.37.85.214.7{1.5}WM16-15
1.49.8720.6{2.1}  20
1.512.58.725.5{2.6}  25
1.512.510.530.4{3.1}  30
1.61512.235.3{3.6}  35
1.6151441.2{4.2}  40
1.720.415.846.1{4.7}  45
1.720.417.551.0{5.2}  50
1.82719.255.9{5.7}  55
1.8272161.8{6.3}  60
1.82722.764.7{6.6}  65
1.82724.571.6{7.3}  70
1.8272882.4{8.4}  80
1.934.231.592.7{9.5}  90
1.711.9734.3{3.5}WM18-20
1.814.48.742.2{4.3}  25
1.814.410.551.0{5.2}  30
1.814.412.259.8{6.1}  35
1.814.41468.6{7.0}  40
2.02215.877.5{7.9}  45
2.02217.585.3{8.7}  50
2.02219.294.1{9.6}  55
2.02221103.0{10.5}  60
2.234.122.7110.8{11.3}  65
2.234.124.5119.6{12.2}  70
2.234.128137.3{14.0}  80
2.341.431.5154.0{15.7}  90
2.341.435171.6{17.5}  100
1.811.7734.3{3.5}WM20-20
1.811.78.742.2{4.3}  25
1.914.310.551.0{5.2}  30
1.914.312.259.8{6.1}  35
1.914.31468.6{7.0}  40
2.01715.877.5{7.9}  45
2.01717.585.3{8.7}  50
2.224.819.294.1{9.6}  55
2.224.821103.0{10.5}  60
2.224.822.7110.8{11.3}  65
2.224.824.5119.6{12.2}  70
2.43628137.3{14.0}  80
2.43631.5154.0{15.7}  90
2.43635171.6{17.5}  100
1.912734.3{3.5}WM22-20
2.0148.742.2{4.3}  25
2.01410.551.0{5.2}  30
2.01412.259.8{6.1}  35
2.0141468.6{7.0}  40
2.32315.877.5{7.9}  45
2.32317.585.3{8.7}  50
2.32319.294.1{9.6}  55
2.32321103.0{10.5}  60
2.43022.7110.8{11.3}  65
2.43024.5119.6{12.2}  70
2.43028137.3{14.0}  80
2.64031.5154.0{15.7}  90
2.64035171.6{17.5}  100
2.31410.551.0{5.2}WM27-30
2.41712.259.8{6.1}  35
2.4171468.6{7.0}  40
2.41815.877.5{7.9}  45
2.62317.585.3{8.7}  50
2.62319.294.1{9.6}  55
2.62321103.0{10.5}  60
2.83122.7110.8{11.3}  65
2.83124.5119.6{12.2}  70
2.83128137.3{14.0}  80
3.043.531.5154.0{15.7}  90
3.043.535171.6{17.5}  100
- Load Calculation Method: Load = Spring Constant x Deflection
    (Int'l Unit)N=N/mmxFmm
kgf=kgf/mmxFmm
(kgf=Nx0.101972)

[ ! ]The values of solid length are for reference only.
 There may be some variations depending on the lot.
[ ! ]Operation frequency: One million times
[ ! ]Product Overview >> Click here
[ ! ]How to use coil springs and precautions >> Click here
[ ! ]Allowable Deflection of (L) Size
WM3-25Fmax.= L x 30%
WM3-30Fmax.= L x 30%
WM4-40Fmax.= L x 30%
WM5-50Fmax.= L x 30%
WM5-55Fmax.= L x 30%
WM5-60Fmax.= L x 30%
WM5-65Fmax.= L x 27%
WM5-70Fmax.= L x 28%
WM6-60Fmax.= L x 30%
WM6-65Fmax.= L x 29%
WM6-70Fmax.= L x 28%
WM6-80Fmax.= L x 28%

[ ! ]Both ends of * marked WM Type springs are not ground.

Part Number 

  • Incomplete part number.
    Please use left hand selections to complete a part number.
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Part Number
WM3-5
WM3-10
WM3-15
WM3-20
WM3-25
WM3-30
WM4-5
WM4-10
WM4-15
WM4-20
WM4-25
WM4-30
WM4-35
WM4-40
WM5-5
WM5-10
WM5-15
WM5-20
WM5-25
WM5-30
WM5-35
WM5-40
WM5-45
WM5-50
WM5-55
WM5-60
WM5-65
WM5-70
WM6-5
WM6-10
WM6-15
WM6-20
WM6-25
WM6-30
WM6-35
WM6-40
WM6-45
WM6-50
WM6-55
WM6-60
WM6-65
WM6-70
WM6-80
WM8-10
WM8-15
WM8-20
WM8-25
WM8-30
WM8-35
WM8-40
WM8-45
WM8-50
WM8-55
WM8-60
WM8-65
WM8-70
WM8-80
WM10-10
WM10-15
WM10-20
Part NumberVolume DiscountDays to Ship RoHSEnd Surface Condition Allowable Load (Configurable Range)
(N)
Max. Load
(N)
Maximum Height when Loaded (Free Length, Allowable Deflection)
(mm)
Free Length L
(mm)
O.D. D (or D1)
(φ)
I.D. D-2d (or D)
(φ)
Spring Constant
(N/mm)
Wire diameter
(φ)
Solid Length
(mm)
Available

4 Days

CompliantNot Grounded1.51~4.503.43.2532.320.352.5
Available

4 Days

CompliantNot Grounded4.51~8.506.96.51032.2420.383.3
Available

Same day

Stock

CompliantNot Grounded8.51~16.0010.39.71532.120.457
Available

4 Days

CompliantNot Grounded8.51~16.0013.713203220.511.5
Available

4 Days

CompliantGrounded8.51~16.0014.717.5253220.511.5
Available

4 Days

CompliantGrounded16.01~30.0017.7213031.920.5520.4
Available

4 Days

CompliantNot Grounded1.51~4.503.93.3543.220.42.3

Same day

Stock

CompliantNot Grounded4.51~8.506.96.51043.120.453.4

Same day

Stock

CompliantNot Grounded8.51~16.0010.89.8154320.55.1
Available

Same day

Stock

CompliantGrounded8.51~16.0013.7132042.920.557.7
Available

4 Days

CompliantGrounded16.01~30.0017.716.32542.820.611.7
Available

4 Days

CompliantGrounded16.01~30.0020.619.53042.820.611.7
Available

4 Days

CompliantGrounded16.01~30.002422.83542.720.6517.6
Available

4 Days

CompliantGrounded16.01~30.0023.5284042.720.6517.6
Available

4 Days

CompliantNot Grounded4.51~8.504.93.35542.90.52.8
Available

Same day

Stock

CompliantGrounded8.51~16.009.86.51053.82.90.64.2
Available

Same day

Stock

CompliantGrounded8.51~16.0014.79.81553.72.90.656.5
Available

Same day

Stock

CompliantGrounded16.01~30.0020.6132053.72.90.656.5
Available

Same day

Stock

CompliantGrounded16.01~30.0025.516.32553.62.90.79.1
Available

4 Days

CompliantGrounded30.01~50.0030.419.53053.52.90.7512.7
Available

4 Days

CompliantGrounded30.01~50.0035.322.83553.42.90.817.4
Available

4 Days

CompliantGrounded30.01~50.0041.2264053.32.90.8523.8
Available

4 Days

CompliantGrounded30.01~50.0046.129.24553.32.90.8523.8
Available

4 Days

CompliantGrounded30.01~50.0043.5355053.22.90.923.8
Available

4 Days

CompliantGrounded30.01~50.004938.55553.22.90.930
Available

4 Days

CompliantGrounded50.01~73.0053426053.22.90.930
Available

4 Days

CompliantGrounded50.01~73.005247.46553.22.90.930
Available

4 Days

CompliantGrounded50.01~73.0058.850.47053.22.90.930
Available

4 Days

CompliantNot Grounded4.51~8.504.93.3564.92.90.552.8
Available

4 Days

CompliantGrounded8.51~16.009.86.51064.72.90.654.7
Available

Same day

Stock

CompliantGrounded8.51~16.0014.79.81564.52.90.758
Available

Same day

Stock

CompliantGrounded16.01~30.0020.6132064.52.90.758
Available

Same day

Stock

CompliantGrounded16.01~30.0025.516.32564.32.90.8513.6
Available

Same day

Stock

CompliantGrounded30.01~50.0030.419.53064.32.90.8513.6
Available

4 Days

CompliantGrounded30.01~50.0035.322.83564.22.90.918
Available

Same day

Stock

CompliantGrounded30.01~50.0041.2264064.22.90.918
Available

Same day

Stock

CompliantGrounded30.01~50.0046.129.24564.22.90.918
Available

Same day

Stock

CompliantGrounded50.01~73.005132.55064.22.90.918
Available

4 Days

CompliantGrounded50.01~73.0055.935.855642.9131
Available

Same day

Stock

CompliantGrounded50.01~73.00534260642.9131
Available

4 Days

CompliantGrounded50.01~73.0054.946.265642.9131
Available

4 Days

CompliantGrounded50.01~73.0058.8507063.82.91.147.3
Available

4 Days

CompliantGrounded50.01~73.0065.957.68063.82.91.148.4
Available

Same day

Stock

CompliantGrounded8.51~16.009.86.51086.52.90.754.2
Available

Same day

Stock

CompliantGrounded8.51~16.0014.79.81586.22.90.98.5
Available

Same day

Stock

CompliantGrounded16.01~30.0020.6132086.22.90.98.5
Available

Same day

Stock

CompliantGrounded16.01~30.0025.516.32586.22.90.98.5
Available

Same day

Stock

CompliantGrounded30.01~50.0030.419.53086.22.90.98.5
Available

Same day

Stock

CompliantGrounded30.01~50.0035.322.835862.9113
Available

4 Days

CompliantGrounded30.01~50.0041.22640862.9113
Available

4 Days

CompliantGrounded30.01~50.0046.129.24585.82.91.119.8
Available

Same day

Stock

CompliantGrounded50.01~73.005132.55085.82.91.119.8
Available

4 Days

CompliantGrounded50.01~73.0055.935.85585.62.91.231.2
Available

4 Days

CompliantGrounded50.01~73.0061.8396085.62.91.231.2
Available

4 Days

CompliantGrounded50.01~73.0064.742.36585.62.91.231.2
Available

4 Days

CompliantGrounded50.01~73.0071.645.57085.62.91.231.2
Available

Same day

Stock

CompliantGrounded73.01~107.0082.4528085.42.91.344.2
Available

4 Days

CompliantGrounded8.51~16.009.86.510108.22.90.95.2
Available

Same day

Stock

CompliantGrounded8.51~16.0014.79.8151082.917.7
Available

Same day

Stock

CompliantGrounded16.01~30.0020.613201082.917.7

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Lead Time

Round Wire Springs -Spring Constant 1.5~3.9 N/mm-:Related Image

Basic Information

Material SWP-A

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