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Round Wire Springs -Spring Constant 0.5~1.0 N/mm-

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

Specifications

Round Wire Springs -Spring Constant 0.5~1.0 N/mm-:
■WF: Fmax. (Allowable Deflection) = L x 45%
d Solid Length F max. Load
N{kgf}
max.
Part Number
Type D-L
0.26 2 2.25 1.1{0.11} WF3-






 5*
0.32 5 4.5 2.2{0.22} 10*
0.32 5 6.7 3.2{0.33} 15*
0.35 7 9 4.4{0.45} 20*
0.35 7 11.2 5.5{0.56} 25*
0.4 13.2 13.5 6.6{0.67} 30
0.4 13.2 15.7 7.6{0.78} 35
0.4 13.2 18 8.8{0.9} 40
0.32 2.3 2.25 1.1{0.11} WF4-












 5*
0.35 3.1 4.5 2.2{0.22} 10*
0.4 5.6 6.7 3.2{0.33} 15*
0.4 5.6 9 4.4{0.45} 20*
0.45 9.9 11.2 5.5{0.56} 25*
0.45 9.9 13.5 6.6{0.67} 30*
0.5 16.5 15.7 7.6{0.78} 35
0.5 16.5 18 8.8{0.9} 40
0.5 16.5 20 9.8{1.0} 45
0.5 16.5 22.5 10.8{1.1} 50
0.5 16.5 24.7 12.1{1.23} 55
0.5 16.5 27 12.7{1.3} 60
0.55 26.4 29.2 14.3{1.46} 65*
0.55 26.4 31.5 15.4{1.58} 70*
0.35 2 2.25 1.1{0.11} WF5-













 5*
0.38 2.8 4.5 2.2{0.22} 10*
0.4 3.4 6.7 3.2{0.33} 15*
0.45 5.4 9 4.4{0.45} 20*
0.5 8.5 11.2 5.5{0.56} 25*
0.55 13.2 13.5 6.6{0.67} 30
0.55 13.2 15.7 7.6{0.78} 35
0.55 20.4 18 8.8{0.9} 40
0.6 20.4 20 9.8{1.0} 45
0.6 20.4 22.5 10.8{1.1} 50
0.6 20.4 24.7 12.1{1.23} 55
0.6 20.4 27 12.7{1.3} 60
0.6 20.4 29.2 14.3{1.5} 65
0.6 20.4 31.5 15.4{1.6} 70
0.4 2.3 2.25 1.1{0.11} WF6-














 5*
0.5 5 4.5 2.2{0.22} 10
0.55 8 6.7 3.2{0.33} 15
0.55 8 9 4.4{0.45} 20
0.6 12 11.2 5.5{0.56} 25
0.65 16 13.5 6.6{0.67} 30
0.65 17 15.7 7.6{0.78} 35
0.65 17 18 8.8{0.9} 40
0.65 17 20 9.8{1.0} 45
0.7 25.2 22.5 10.8{1.1} 50
0.7 25.2 24.7 12.1{1.23} 55
0.7 25.2 27 12.7{1.3} 60
0.7 25.2 29.2 14.3{1.46} 65
0.7 25.2 31.5 14.7{1.5} 70
0.7 25.2 36 17.7{1.8} 80
0.6 5 4.5 2.2{0.22} WF8-












10
0.65 7.5 6.7 3.2{0.33} 15
0.7 10.8 9 4.4{0.45} 20
0.7 10.8 11.2 5.5{0.56} 25
0.75 14.5 13.5 6.6{0.67} 30
0.75 14.5 15.7 7.6{0.78} 35
0.8 20 18 8.8{0.9} 40
0.8 20 20 9.8{1.0} 45
0.8 20 22.5 10.8{1.1} 50
0.8 20 24.7 12.1{1.23} 55
0.85 27.6 27 12.7{1.3} 60
0.85 27.6 29.2 14.3{1.46} 65
0.85 27.6 31.5 14.7{1.5} 70
0.85 28.1 36 17.7{1.8} 80

d Solid Length F max. Load
N{kgf}
max.
Part Number
Type D-L
0.65 5 4.5 2.2{0.22} WF10-













10
0.65 5 6.7 3.2{0.33} 15
0.8 10.4 9 4.4{0.45} 20
0.8 10.4 11.2 5.5{0.56} 25
0.85 14 13.5 6.6{0.67} 30
0.85 14 15.7 7.6{0.78} 35
0.9 17.5 18 8.8{0.9} 40
0.9 17.5 20 9.8{1.0} 45
0.9 17.5 22.5 10.8{1.1} 50
0.9 17.5 24.7 12.1{1.23} 55
1.0 31 27 12.7{1.3} 60
1.0 31 29.2 14.3{1.46} 65
1.0 31 31.5 14.7{1.5} 70
1.0 31 36 17.7{1.8} 80
0.7 4.6 4.5 2.3{0.23} WF12-












10
0.7 4.6 6.7 3.2{0.33} 15
0.8 7.2 9 4.4{0.45} 20
0.8 7.2 11.2 5.5{0.56} 25
0.9 11.3 13.5 6.6{0.67} 30
0.9 11.3 15.7 7.6{0.78} 35
0.9 11.3 18 8.8{0.9} 40
0.9 11.3 20 9.8{1.0} 45
1.0 18 22.5 10.8{1.1} 50
1.0 18 24.7 12.1{1.23} 55
1.0 18 27 12.7{1.3} 60
1.0 18 29.2 14.3{1.46} 65
1.1 28.1 31.5 14.7{1.5} 70
1.1 27.5 36 17.7{1.8} 80
0.75 4.9 4.5 2.3{0.23} WF13-













10
0.8 6 6.7 3.2{0.33} 15
0.8 6 9 4.4{0.45} 20
0.85 7.2 11.2 5.5{0.56} 25
1.0 15 13.5 6.6{0.67} 30
1.0 15 15.7 7.6{0.78} 35
1.0 15 18 8.8{0.9} 40
1.0 15 20 9.8{1.0} 45
1.0 15 22.5 10.8{1.1} 50
1.1 22 24.7 12.1{1.23} 55
1.1 22 27 12.7{1.3} 60
1.1 22 29.2 14.3{1.46} 65
1.1 22 31.5 14.7{1.5} 70
1.1 22 36 17.7{1.8} 80
1.2 33.6 40.5 19.9{2.0} 90
0.8 5.2 6.7 3.2{0.33} WF14-












15
0.9 7.9 9 4.4{0.45} 20
0.9 7.9 11.2 5.5{0.56} 25
1.0 12 13.5 6.6{0.67} 30
1.0 12 15.7 7.6{0.78} 35
1.0 12 18 8.8{0.9} 40
1.0 12 20 9.8{1.0} 45
1.1 18.2 22.5 10.8{1.1} 50
1.1 18.2 24.7 12.1{1.23} 55
1.1 18.2 27 12.7{1.3} 60
1.2 27.6 29.2 14.3{1.46} 65
1.2 27.6 31.5 14.7{1.5} 70
1.2 27.6 36 17.7{1.8} 80
1.3 39.7 40.5 19.9{2.0} 90

d Solid Length F max. Load
N{kgf}
max.
Part Number
Type D-L
0.9 6.3 6.7 3.2{0.33} WF16-












15
1.0 8.7 9 4.4{0.45} 20
1.0 8.7 11.2 5.5{0.56} 25
1.1 12.8 13.5 6.6{0.67} 30
1.1 12.8 15.7 7.6{0.78} 35
1.2 18.6 18 8.8{0.9} 40
1.2 18.6 20 9.8{1.0} 45
1.2 18.6 22.5 10.8{1.1} 50
1.2 18.6 24.7 12.1{1.23} 55
1.3 26.8 27 12.7{1.3} 60
1.3 26.8 29.2 14.3{1.46} 65
1.3 26.8 31.5 14.7{1.5} 70
1.4 36 36 17.7{1.8} 80
1.4 36.4 40.5 19.9{2.0} 90
1.2 9 9 8.8{0.9} WF18-










20
1.3 12.4 11.2 10.8{1.1} 25
1.3 12.4 13.5 12.7{1.3} 30
1.4 16.1 15.7 14.7{1.5} 35
1.5 21 18 17.7{1.8} 40
1.5 21 20 19.9{2.03} 45
1.5 21 22.5 22.1{2.25} 50
1.6 28.8 24.7 24.3{2.48} 55
1.6 28.8 27 26.5{2.7} 60
1.6 28.8 29.2 28.7{2.93} 65
1.7 37.4 31.5 30.9{3.15} 70
1.7 37.4 36 35.3{3.6} 80
1.2 7.2 9 8.8{0.9} WF20-











20
1.3 9.8 11.2 10.8{1.1} 25
1.4 12.6 13.5 12.7{1.3} 30
1.4 12.6 15.7 14.7{1.5} 35
1.5 16.5 18 17.7{1.8} 40
1.5 16.5 20 19.9{2.03} 45
1.6 21.6 22.5 22.1{2.25} 50
1.6 21.6 24.7 24.3{2.48} 55
1.6 21.6 27 26.5{2.7} 60
1.7 28.1 29.2 28.7{2.93} 65
1.7 28.1 31.5 30.9{3.15} 70
1.7 28.1 36 35.3{3.6} 80
1.3 7.8 9 8.8{0.9} WF22-











20
1.4 10.5 11.2 11.0{1.12} 25
1.4 10.5 13.5 13.2{1.35} 30
1.5 13.5 15.7 15.4{1.57} 35
1.5 13.5 18 17.7{1.8} 40
1.7 22.1 20.2 19.8{2.02} 45
1.7 22.1 22.5 22.1{2.25} 50
1.7 22.1 24.7 24.2{2.47} 55
1.8 28.8 27 26.5{2.7} 60
1.8 28.8 29.2 28.6{2.92} 65
1.8 28.8 31.5 30.9{3.15} 70
1.8 28.8 36 35.3{3.6} 80
1.7 14.1 13.5 13.2{1.35} WF27-









30
1.7 14.1 15.7 15.4{1.57} 35
1.7 14.1 18 17.7{1.8} 40
1.9 21.4 20.2 19.8{2.02} 45
1.9 21.4 22.5 22.1{2.25} 50
2.0 26 24.7 24.2{2.47} 55
2.0 26 27 26.5{2.7} 60
2.0 26 29.2 28.6{2.92} 65
2.0 26 31.5 30.9{3.15} 70
2.0 26 36 35.3{3.6} 80
- Load Calculation Method: Load = Spring Constant x Deflection
    (Int'l Unit)N=N/mmxFmm
kgf=kgf/mmxFmm
(kgf=Nx0.101972)

[ ! ]Both ends of * marked WF 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
D
WY WR WF WL WT WM WH WB
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%
■WL: Fmax. (Allowable Deflection) = L x 40%
d Solid Length F max. Load
N{kgf}
max.
Part Number
Type D-L
0.2 1.7 2 0.98{0.1} WL2-




 5*
0.26 5.2 4 2.0 {0.2} 10*
0.26 5.2 6 2.9 {0.3} 15*
0.29 9 8 3.9 {0.4} 20*
0.29 9 10 4.9 {0.5} 25*
0.3 10.8 12 5.9 {0.6} 30*
0.3 2.1 2 2.0 {0.2} WL3-







 5*
0.35 3.9 4 3.9 {0.4} 10*
0.4 6.5 6 5.9 {0.6} 15*
0.4 6.5 8 7.8 {0.8} 20*
0.45 13 10 9.8 {1.0} 25*
0.45 13 12 11.8 {1.2} 30*
0.45 13 14 13.7 {1.4} 35*
0.5 21 16 15.7 {1.6} 40*
0.35 2.1 2 2.0 {0.2} WL4-










 5*
0.45 5 4 3.9 {0.4} 10*
0.45 5 6 5.9 {0.6} 15*
0.5 9 8 7.8 {0.8} 20
0.5 9 10 9.8 {1.0} 25
0.55 13.9 12 11.8 {1.2} 30
0.55 13.9 14 13.7 {1.4} 35
0.6 21.6 16 15.7 {1.6} 40
0.6 21.6 18 17.7 {1.8} 45
0.6 21.6 20 19.6 {2.0} 50
0.6 21.6 22 21.6 {2.2} 55
0.65 33 24 23.5 {2.4} 60
0.4 2.3 2 2.0 {0.2} WL5-












 5*
0.45 3.4 4 3.9 {0.4} 10*
0.5 5 6 5.9 {0.6} 15*
0.55 7.7 8 7.8 {0.8} 20
0.6 10.8 10 9.8 {1.0} 25
0.6 10.8 12 11.8 {1.2} 30
0.65 15.6 14 13.7 {1.4} 35
0.65 15.6 16 15.7 {1.6} 40
0.7 20 18 17.7 {1.8} 45
0.7 20 20 19.6 {2.0} 50
0.7 23.1 22 21.6 {2.2} 55
0.75 33 24 23.5 {2.4} 60
0.75 32.3 26 25.5 {2.6} 65
0.75 32.3 28 27.5 {2.8} 70
0.45 2.5 2 2.0 {0.2} WL6-













 5*
0.55 4.7 4 3.9 {0.4} 10
0.55 4.7 6 5.9 {0.6} 15
0.65 9 8 7.8 {0.8} 20
0.65 9 10 9.8 {1.0} 25
0.7 13.7 12 11.8 {1.2} 30
0.7 13.7 14 13.7 {1.4} 35
0.7 13.7 16 15.7 {1.6} 40
0.75 18.9 18 17.7 {1.8} 45
0.75 18.9 20 19.6 {2.0} 50
0.75 18.9 22 21.6 {2.2} 55
0.8 26.4 24 23.5 {2.4} 60
0.8 26.4 26 25.5 {2.6} 65
0.85 30.6 28 27.5 {2.8} 70
0.85 34.9 32 31.4 {3.2} 80

d Solid Length F max. Load
N{kgf}
max.
Part Number
Type D-L
0.65 4.7 4 3.9{0.4} WL8-












10
0.75 8.5 6 5.9{0.6} 15
0.75 8.5 8 7.8{0.8} 20
0.75 8.5 10 9.8{1.0} 25
0.8 11.2 12 11.8{1.2} 30
0.8 11.2 14 13.7{1.4} 35
0.8 11.2 16 15.7{1.6} 40
0.85 15.3 18 17.7{1.8} 45
0.85 15.3 20 19.6{2.0} 50
0.85 15.3 22 21.6{2.2} 55
0.9 19.4 24 23.5{2.4} 60
0.9 19.4 26 25.5{2.6} 65
1.0 31 28 27.5{2.8} 70
1.0 31 32 31.4{3.2} 80
0.75 5.3 4 3.9{0.4} WL10-












10
0.8 6.4 6 5.9{0.6} 15
0.8 6.4 8 7.8{0.8} 20
0.9 10.8 10 9.8{1.0} 25
0.9 10.8 12 11.8{1.2} 30
0.9 10.8 14 13.7{1.4} 35
0.9 10.8 16 15.7{1.6} 40
1.0 17 18 17.7{1.8} 45
1.0 17 20 19.6{2.0} 50
1.0 17 22 21.6{2.2} 55
1.0 17 24 23.5{2.4} 60
1.1 24 26 25.5{2.6} 65
1.1 24 28 27.5{2.8} 70
1.1 24.2 32 31.4{3.2} 80
0.8 4.8 4 4.0{0.4} WL12-












10
0.9 7.2 6 5.9{0.6} 15
0.9 7.2 8 7.8{0.8} 20
0.9 7.2 10 9.8{1.0} 25
1.0 10.5 12 11.8{1.2} 30
1.0 10.5 14 13.7{1.4} 35
1.0 10.5 16 15.7{1.6} 40
1.1 15.4 18 17.7{1.8} 45
1.1 15.4 20 19.6{2.0} 50
1.1 15.4 22 21.6{2.2} 55
1.2 22.8 24 23.5{2.4} 60
1.2 22.8 26 25.5{2.6} 65
1.2 22.8 28 27.5{2.8} 70
1.3 34.5 32 31.4{3.2} 80
0.85 5.1 4 4.0{0.4} WL13-













10
0.9 6.3 6 5.9{0.6} 15
1.0 8.7 8 7.8{0.8} 20
1.0 8.7 10 9.8{1.0} 25
1.1 13.2 12 11.8{1.2} 30
1.1 13.2 14 13.7{1.4} 35
1.1 13.2 16 15.7{1.6} 40
1.1 13.2 18 17.7{1.8} 45
1.1 13.2 20 19.6{2.0} 50
1.1 13.2 22 21.6{2.2} 55
1.1 13.2 24 23.5{2.4} 60
1.2 18.6 26 25.5{2.6} 65
1.2 18.6 28 27.5{2.8} 70
1.4 37.8 32 31.4{3.2} 80
1.4 37.8 36 35.3{3.6} 90
1.0 7.5 6 5.9{0.6} WL14-












15
1.0 7.5 8 7.8{0.8} 20
1.0 7.5 10 9.8{1.0} 25
1.1 11 12 11.8{1.2} 30
1.1 11 14 13.7{1.4} 35
1.1 11 16 15.7{1.6} 40
1.2 15.6 18 17.7{1.8} 45
1.2 15.6 20 19.6{2.0} 50
1.2 15.6 22 21.6{2.2} 55
1.2 15.6 24 23.5{2.4} 60
1.3 22.1 26 25.5{2.6} 65
1.3 22.1 28 27.5{2.8} 70
1.3 22.1 32 31.4{3.2} 80
1.5 43.5 36 35.3{3.6} 90

d Solid Length F max. Load
N{kgf}
max.
Part Number
Type D-L
1.1 8.2 6 5.9{0.6} WL16-













15
1.1 8.2 8 7.8{0.8} 20
1.2 10 10 9.8{1.0} 25
1.2 10 12 11.8{1.2} 30
1.2 10 14 13.7{1.4} 35
1.2 10 16 15.7{1.6} 40
1.4 21 18 17.7{1.8} 45
1.4 21 20 19.6{2.0} 50
1.4 21 22 21.6{2.2} 55
1.4 21 24 23.5{2.4} 60
1.5 29.7 26 25.5{2.6} 65
1.5 29.7 28 27.5{2.8} 70
1.5 29.7 32 31.4{3.2} 80
1.6 40 36 35.3{3.6} 90
1.5 10 8 23.5{2.4} WL18-












20
1.6 12 10 29.4{3.0} 25
1.6 12 12 35.3{3.6} 30
1.7 16.2 14 41.2{4.2} 35
1.7 16.2 16 47.1{4.8} 40
1.8 19.8 18 53.0{5.4} 45
1.8 19.8 20 58.8{6.0} 50
1.8 19.8 22 64.7{6.6} 55
1.8 19.8 24 70.6{7.2} 60
2.0 32 26 76.5{7.8} 65
2.0 32 28 82.4{8.4} 70
2.0 32 32 94.1{9.6} 80
2.2 43 36 105.9{10.8} 90
2.2 43 40 117.7{12.0} 100
1.6 10.4 8 23.5{2.4} WL20-












20
1.6 10.4 10 29.4{3.0} 25
1.7 12.8 12 35.3{3.6} 30
1.7 12.8 14 41.2{4.2} 35
1.8 15.8 16 47.1{4.8} 40
1.8 15.8 18 53.0{5.4} 45
1.8 15.8 20 58.8{6.0} 50
1.8 15.8 22 64.7{6.6} 55
2.0 24 24 70.6{7.2} 60
2.0 24 26 76.5{7.8} 65
2.0 24 28 82.4{8.4} 70
2.2 37.4 32 94.1{9.6} 80
2.2 37.4 36 105.9{10.8} 90
2.2 37.4 40 117.7{12.0} 100
1.7 10.8 8 23.5{2.4} WL22-












20
1.8 13.3 10 29.4{3.0} 25
1.8 13.3 12 35.3{3.6} 30
1.8 13.3 14 41.2{4.2} 35
2.0 20 16 47.1{4.8} 40
2.0 20 18 53.0{5.4} 45
2.0 20 20 58.8{6.0} 50
2.0 20 22 64.7{6.6} 55
2.2 28.6 24 70.6{7.2} 60
2.2 28.6 26 76.5{7.8} 65
2.2 28.6 28 82.4{8.4} 70
2.2 28.6 32 94.1{9.6} 80
2.3 34.5 36 105.9{10.8} 90
2.3 34.5 40 117.7{12.0} 100
2.1 14 12 35.3{3.6} WL27-










30
2.1 14 14 41.2{4.2} 35
2.3 19 16 47.1{4.8} 40
2.3 19 18 53.0{5.4} 45
2.3 19 20 58.8{6.0} 50
2.3 19 22 64.7{6.6} 55
2.5 28 24 70.6{7.2} 60
2.5 28 26 76.5{7.8} 65
2.6 34.5 28 82.4{8.4} 70
2.6 34.5 32 94.1{9.6} 80
2.8 46.7 36 105.9{10.8} 90
2.8 46.7 40 117.7{12.0} 100
- Load Calculation Method: Load = Spring Constant x Deflection
    (Int'l Unit)N=N/mmxFmm
kgf=kgf/mmxFmm
(kgf=Nx0.101972)

[ ! ]Both ends of * marked WL 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

Part Number 

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Part Number
WF3-5
WF4-5
WF5-5
WF6-5
WL2-5
Part NumberMinimum order quantityVolume 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)
1 Piece(s)Available

8 Days or more

10Not Grounded~1.501.12.75532.480.50.262
1 Piece(s)Available

8 Days or more

10Not Grounded~1.501.12.75543.360.50.322.3
1 Piece(s)Available

8 Days or more

10Not Grounded~1.501.12.75554.30.50.352
1 Piece(s)Available

Same day

Stock

10Not Grounded~1.501.12.75565.20.50.42.3
1 Piece(s)Available

Same day

Stock

10Not Grounded~1.500.983521.60.50.21.7

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  1. 1

Basic Information

Material SWP-A

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