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Round Wire Springs -Spring Constant 1.5~3.9 N/mm- (WT10-20)

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

Specifications

Round Wire Springs -Spring Constant 1.5~3.9 N/mm-:
■WT: Fmax. (Allowable Deflection) = L x 40% (L x 35%)
d Solid Length F
max.
Load
N{kgf}
max.
Part Number
Type D-L
0.3 1.73 2 2.9{0.3} WT3- 5*
0.4 5 4 5.9{0.6} 10*
0.45 8.78 6 8.8{0.9} 15*
0.45 8.78 8 11.8{1.2} 20*
0.5 14.5 10 14.7{1.5} 25*
0.4 2.7 2 2.9{0.3} WT4- 5*
0.4 2.7 4 5.9{0.6} 10*
0.5 6.5 6 8.8{0.9} 15*
0.55 9.63 8 11.8{1.2} 20
0.55 9.63 10 14.7{1.5} 25
0.6 15 12 17.7{1.8} 30
0.6 15 14 20.6{2.1} 35
0.65 22.1 16 23.5{2.4} 40
0.45 2.36 2 3.9{0.4} WT5- 5*
0.5 3.25 4 7.8{0.8} 10*
0.6 6.3 6 11.8{1.2} 15
0.6 6.3 8 15.7{1.6} 20
0.7 12.6 10 19.6{2.0} 25
0.7 12.6 12 23.5{2.4} 30
0.75 17.3 14 27.5{2.8} 35
0.75 17.3 14 27.5{2.8} (40)
0.8 24 15.8 30.9{3.2} (45)
0.8 24 17.5 34.3{3.5} (50)
0.85 32.3 19.3 37.8{3.9} (55)
0.85 32.3 21 41.2{4.2} (60)
0.85 34 22.7 44.5{4.5} (65)
0.9 44.6 24.5 48.1{4.9} (70)
0.5 2.38 2 3.9{0.4} WT6- 5*
0.6 4.35 4 7.8{0.8} 10
0.6 4.35 6 11.8{1.2} 15
0.7 7.7 8 15.7{1.6} 20
0.7 7.7 10 19.6{2.0} 25
0.8 14 12 23.5{2.4} 30
0.8 14 14 27.5{2.8} 35
0.85 18.7 16 31.4{3.2} 40
0.85 18.7 18 35.3{3.6} 45
0.9 24.8 20 39.2{4.0} 50
0.9 24.8 19 37.8{3.9} (55)
0.9 24.8 21 41.2{4.2} (60)
0.9 26.1 22.7 44.5{4.5} (65)
1 43 24.5 48.1{4.9} (70)
1 43 28 54.9{5.6} (80)

d Solid Length F
max.
Load
N{kgf}
max.
Part Number
Type D-L
0.7 4.38 4 7.8{0.8} WT8- 10
0.8 6.8 6 11.8{1.2} 15
0.8 6.8 8 15.7{1.6} 20
0.8 6.8 10 19.6{2.0} 25
0.9 10.8 12 23.5{2.4} 30
0.9 10.8 14 27.5{2.8} 35
1 17.5 16 31.4{3.2} 40
1 17.5 18 35.3{3.6} 45
1 17.5 20 39.2{4.0} 50
1.1 27.5 22 43.1{4.4} 55
1.1 27.5 24 47.1{4.8} 60
1.1 27.5 26 51.0{5.2} 65
1.1 27.5 28 54.9{5.6} 70
1.2 42 32 62.8{6.4} 80
0.85 5.53 4 7.8{0.8} WT10- 10
0.9 6.75 6 11.8{1.2} 15
0.9 6.75 8 15.7{1.6} 20
1 10 10 19.6{2.0} 25
1 10 12 23.5{2.4} 30
1 10 14 27.5{2.8} 35
1 10 16 31.4{3.2} 40
1.1 14.3 18 35.3{3.6} 45
1.1 14.3 20 39.2{4.0} 50
1.2 21.6 22 43.1{4.4} 55
1.2 21.6 24 47.1{4.8} 60
1.2 21.6 26 51.0{5.2} 65
1.3 32.5 28 54.9{5.6} 70
1.3 32.5 32 62.8{6.4} 80
1 6 6 11.8{1.2} WT13- 15
1.1 8.25 8 15.7{1.6} 20
1.1 8.25 10 19.6{2.0} 25
1.2 11.1 12 23.5{2.4} 30
1.2 11.1 14 27.5{2.8} 35
1.2 11.1 16 31.4{3.2} 40
1.2 11.1 18 35.3{3.6} 45
1.3 15.6 20 39.2{4.0} 50
1.3 15.6 22 43.1{4.4} 55
1.3 15.6 24 47.1{4.8} 60
1.4 21 26 51.0{5.2} 65
1.4 21 28 54.9{5.6} 70
1.4 21 32 62.8{6.4} 80
1.2 7.5 6 11.8{1.2} WT16- 15
1.3 9.43 8 15.7{1.6} 20
1.4 12.6 10 19.6{2.0} 25
1.4 12.6 12 23.5{2.4} 30
1.4 12.6 14 27.5{2.8} 35
1.4 12.6 16 31.4{3.2} 40
1.6 22.4 18 35.3{3.6} 45
1.6 22.4 20 39.2{4.0} 50
1.6 22.4 22 43.1{4.4} 55
1.7 28.9 24 47.1{4.8} 60
1.7 28.9 26 51.0{5.2} 65
1.7 28.9 28 54.9{5.6} 70
1.7 28.9 32 62.8{6.4} 80

d Solid Length F
max.
Load
N{kgf}
max.
Part Number
Type D-L
1.6 10.8 8 31.4{3.2} WT18- 20
1.7 13.6 10 39.2{4.0} 25
1.7 13.6 12 47.1{4.8} 30
1.7 13.6 14 54.9{5.6} 35
1.8 16.7 16 62.8{6.4} 40
1.9 20.5 18 70.6{7.2} 45
1.9 20.5 20 78.5{8.0} 50
2 26 22 86.3{8.8} 55
2 26 24 94.1{9.6} 60
2 26 26 102.0{10.4} 65
2 26 28 109.8{11.2} 70
2.1 31.5 32 125.5{12.8} 80
1.8 11.3 8 31.4{3.2} WT22- 20
1.8 11.3 10 39.2{4.0} 25
1.9 13.3 12 47.1{4.8} 30
1.9 13.3 14 54.9{5.6} 35
2 16 16 62.8{6.4} 40
2.1 19.5 18 70.6{7.2} 45
2.1 19.5 20 78.5{8.0} 50
2.3 28.2 22 86.3{8.8} 55
2.3 28.2 24 94.1{9.6} 60
2.3 28.2 26 102.0{10.4} 65
2.3 28.2 28 109.8{11.2} 70
2.4 33.6 32 125.5{12.8} 80
2.1 13.2 12 47.1{4.8} WT27- 30
2.3 17.9 14 54.9{5.6} 35
2.3 17.9 16 62.8{6.4} 40
2.4 20.4 18 70.6{7.2} 45
2.6 28.6 20 78.5{8.0} 50
2.6 28.6 22 86.3{8.8} 55
2.6 28.6 24 94.1{9.6} 60
2.6 28.6 26 102.0{10.4} 65
2.8 39.2 28 109.8{11.2} 70
2.8 39.2 32 125.5{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.
  Type WY WR WF WL WT WM WH WB
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%
d Solid Length F
max.
Load
N{kgf}
max.
Part Number
Type D-L
0.35 2.5 1.8 3.4{0.4} WM 3- 5*
0.38 3.3 3.5 6.9{0.7}     10*
0.45 7 5.3 10.3{1.1}     15*
0.5 11.5 7 13.7{1.4}     20*
0.5 11.5 7.5 14.7{1.5}     (25)
0.55 20.4 9 17.7{1.8}     (30)
0.4 2.3 1.7 3.9{0.4} WM 4- 5*
0.45 3.4 3.5 6.9{0.7}     10*
0.5 5.1 5.2 10.8{1.1}     15*
0.55 7.7 7 13.7{1.4}     20
0.6 11.7 8.7 17.7{1.8}     25
0.6 11.7 10.5 20.6{2.1}     30
0.65 17.6 12.2 24.0{2.5}     35
0.65 17.6 12 23.5{2.4}     (40)
0.5 2.8 1.7 4.9{0.5} WM 5- 5*
0.6 4.2 3.5 9.8{1.0}     10
0.65 6.5 5.2 14.7{1.5}     15
0.65 6.5 7 20.6{2.1}     20
0.7 9.1 8.7 25.5{2.6}     25
0.75 12.7 10.5 30.4{3.1}     30
0.8 17.4 12.2 35.3{3.6}     35
0.85 23.8 14 41.2{4.2}     40
0.85 23.8 15.8 46.1{4.7}     45
0.9 23.8 15 43.5{4.5}     (50)
0.9 30 16.5 49.0{5.0}     (55)
0.9 30 18 53.0{5.4}     (60)
0.9 30 17.6 52.0{5.3}     (65)
0.9 30 19.6 58.8{6.0}     (70)
0.55 2.8 1.7 4.9{0.5} WM 6- 5*
0.65 4.7 3.5 9.8{1.0}     10
0.75 8 5.2 14.7{1.5}     15
0.75 8 7 20.6{2.1}     20
0.85 13.6 8.7 25.5{2.6}     25
0.85 13.6 10.5 30.4{3.1}     30
0.9 18 12.2 35.3{3.6}     35
0.9 18 14 41.2{4.2}     40
0.9 18 15.8 46.1{4.7}     45
0.9 18 17.5 51.0{5.2}     50
1.0 31 19.2 55.9{5.7}     55
1.0 31 18 53.0{5.4}     (60)
1.0 31 18.8 54.9{5.6}     (65)
1.1 47.3 20 58.8{6.0}     (70)
1.1 48.4 22.4 65.9{6.7}     (80)
0.75 4.2 3.5 9.8{1.0} WM 8- 10
0.9 8.5 5.2 14.7{1.5}     15
0.9 8.5 7 20.6{2.1}     20
0.9 8.5 8.7 25.5{2.6}     25
0.9 8.5 10.5 30.4{3.1}     30
1.0 13 12.2 35.3{3.6}     35
1.0 13 14 41.2{4.2}     40
1.1 19.8 15.8 46.1{4.7}     45
1.1 19.8 17.5 51.0{5.2}     50
1.2 31.2 19.2 55.9{5.7}     55
1.2 31.2 21 61.8{6.3}     60
1.2 31.2 22.7 64.7{6.6}     65
1.2 31.2 24.5 71.6{7.3}     70
1.3 44.2 28 82.4{8.4}     80

d Solid Length F
max.
Load
N{kgf}
max.
Part Number
Type D-L
0.9 5.2 3.5 9.8{1.0} WM 10- 10
1.0 7.7 5.2 14.7{1.5}     15
1.0 7.7 7 20.6{2.1}     20
1.1 11 8.7 25.5{2.6}     25
1.1 11 10.5 30.4{3.1}     30
1.2 16.2 12.2 35.3{3.6}     35
1.2 16.2 14 41.2{4.2}     40
1.3 22.1 15.8 46.1{4.7}     45
1.3 22.1 17.5 51.0{5.2}     50
1.3 22.1 19.2 55.9{5.7}     55
1.4 32.1 21 61.8{6.3}     60
1.4 32.1 22.7 64.7{6.6}     65
1.4 32.1 24.5 71.6{7.3}     70
1.4 32.2 28 82.4{8.4}     80
1.0 5.5 3.5 10.3{1.1} WM 12- 10
1.1 7.4 5.2 14.7{1.5}     15
1.1 7.4 7 20.6{2.1}     20
1.1 7.4 8.7 25.5{2.6}     25
1.2 10.2 10.5 30.4{3.1}     30
1.2 10.2 12.2 35.3{3.6}     35
1.3 14.3 14 41.2{4.2}     40
1.3 14.3 15.8 46.1{4.7}     45
1.3 14.3 17.5 51.0{5.2}     50
1.4 19.6 19.2 55.9{5.7}     55
1.4 19.6 21 61.8{6.3}     60
1.5 26.3 22.7 64.7{6.6}     65
1.5 26.3 24.5 71.6{7.3}     70
1.6 36.8 28 82.4{8.4}     80
1.0 5 3.5 10.3{1.1} WM 13- 10
1.2 8.4 5.2 14.7{1.5}     15
1.3 11.7 7 20.6{2.1}     20
1.3 11.7 8.7 25.5{2.6}     25
1.4 14.5 10.5 30.4{3.1}     30
1.4 14.5 12.2 35.3{3.6}     35
1.4 14.5 14 41.2{4.2}     40
1.4 14.5 15.8 46.1{4.7}     45
1.4 14.5 17.5 51.0{5.2}     50
1.5 22.5 19.2 55.9{5.7}     55
1.5 22.5 21 61.8{6.3}     60
1.6 28.8 22.7 64.7{6.6}     65
1.6 28.8 24.5 71.6{7.3}     70
1.7 37.4 28 82.4{8.4}     80
1.7 37.4 31.5 92.9{9.5}     90
1.2 7.5 5.2 14.7{1.5} WM 14- 15
1.3 9.8 7 20.6{2.1}     20
1.4 13.3 8.7 25.5{2.6}     25
1.4 13.3 10.5 30.4{3.1}     30
1.4 13.3 12.2 35.3{3.6}     35
1.4 13.3 14 41.2{4.2}     40
1.5 17.3 15.8 46.1{4.7}     45
1.5 17.3 17.5 51.0{5.2}     50
1.5 17.3 19.2 55.9{5.7}     55
1.6 23.2 21 61.8{6.3}     60
1.6 23.2 22.7 64.7{6.6}     65
1.7 30.6 24.5 71.6{7.3}     70
1.7 30.6 28 82.4{8.4}     80
1.8 39.6 31.5 92.7{9.5}     90

d Solid Length F
max.
Load
N{kgf}
max.
Part Number
Type D-L
1.3 7.8 5.2 14.7{1.5} WM 16- 15
1.4 9.8 7 20.6{2.1}     20
1.5 12.5 8.7 25.5{2.6}     25
1.5 12.5 10.5 30.4{3.1}     30
1.6 15 12.2 35.3{3.6}     35
1.6 15 14 41.2{4.2}     40
1.7 20.4 15.8 46.1{4.7}     45
1.7 20.4 17.5 51.0{5.2}     50
1.8 27 19.2 55.9{5.7}     55
1.8 27 21 61.8{6.3}     60
1.8 27 22.7 64.7{6.6}     65
1.8 27 24.5 71.6{7.3}     70
1.8 27 28 82.4{8.4}     80
1.9 34.2 31.5 92.7{9.5}     90
1.7 11.9 7 34.3{3.5} WM 18- 20
1.8 14.4 8.7 42.2{4.3}     25
1.8 14.4 10.5 51.0{5.2}     30
1.8 14.4 12.2 59.8{6.1}     35
1.8 14.4 14 68.6{7.0}     40
2.0 22 15.8 77.5{7.9}     45
2.0 22 17.5 85.3{8.7}     50
2.0 22 19.2 94.1{9.6}     55
2.0 22 21 103.0{10.5}     60
2.2 34.1 22.7 110.8{11.3}     65
2.2 34.1 24.5 119.6{12.2}     70
2.2 34.1 28 137.3{14.0}     80
2.3 41.4 31.5 154.0{15.7}     90
2.3 41.4 35 171.6{17.5}     100
1.8 11.7 7 34.3{3.5} WM 20- 20
1.8 11.7 8.7 42.2{4.3}     25
1.9 14.3 10.5 51.0{5.2}     30
1.9 14.3 12.2 59.8{6.1}     35
1.9 14.3 14 68.6{7.0}     40
2.0 17 15.8 77.5{7.9}     45
2.0 17 17.5 85.3{8.7}     50
2.2 24.8 19.2 94.1{9.6}     55
2.2 24.8 21 103.0{10.5}     60
2.2 24.8 22.7 110.8{11.3}     65
2.2 24.8 24.5 119.6{12.2}     70
2.4 36 28 137.3{14.0}     80
2.4 36 31.5 154.0{15.7}     90
2.4 36 35 171.6{17.5}     100
1.9 12 7 34.3{3.5} WM 22- 20
2.0 14 8.7 42.2{4.3}     25
2.0 14 10.5 51.0{5.2}     30
2.0 14 12.2 59.8{6.1}     35
2.0 14 14 68.6{7.0}     40
2.3 23 15.8 77.5{7.9}     45
2.3 23 17.5 85.3{8.7}     50
2.3 23 19.2 94.1{9.6}     55
2.3 23 21 103.0{10.5}     60
2.4 30 22.7 110.8{11.3}     65
2.4 30 24.5 119.6{12.2}     70
2.4 30 28 137.3{14.0}     80
2.6 40 31.5 154.0{15.7}     90
2.6 40 35 171.6{17.5}     100
2.3 14 10.5 51.0{5.2} WM 27- 30
2.4 17 12.2 59.8{6.1}     35
2.4 17 14 68.6{7.0}     40
2.4 18 15.8 77.5{7.9}     45
2.6 23 17.5 85.3{8.7}     50
2.6 23 19.2 94.1{9.6}     55
2.6 23 21 103.0{10.5}     60
2.8 31 22.7 110.8{11.3}     65
2.8 31 24.5 119.6{12.2}     70
2.8 31 28 137.3{14.0}     80
3.0 43.5 31.5 154.0{15.7}     90
3.0 43.5 35 171.6{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
WT10-20
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

Same day

Stock

10Grounded8.51~16.0015.71220108.220.96.75

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Basic Information

Material SWP-A

Please check the type/dimensions/specifications of the part WT10-20 in the Round Wire Springs -Spring Constant 1.5~3.9 N/mm- series.

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(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)
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