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Round Coil Springs-Fmax. (Allowable Deflection) = Lx25%-30%/O.D. Referenced

:
MISUMI

    Round Coil Springs, O.D. Referenced, Piano Wire, WH / WB

    Round wire compression springs standardized so that the spring constant is the same for the same outer diameter. Select WH (maximum allowable deflection 20 ~ 30%) or WB (25%) by the required stroke and load.

    • Material: piano wire.
    • Solid length is a reference value and may vary slightly by lot. Number of uses: 1,000,000 cycles.
    • WH sizes marked with an asterisk in the dimension table have both end faces unground.

    Part numbers and dimensions

    Ordering example

    Type
    WH13-60

    Spring constant N/mm {kgf/mm}. WY type D12, 14 and WT type D12, 14, 20 are not available.

    D / TypeWYWRWFWLWTWMWHWB
    20.5{0.05}
    30.1
    {0.01}    		0.3
    {0.03}    		0.5
    {0.05}    		1.0
    {0.1}    		1.5
    {0.15}    		2.0
    {0.2}    		3.9{0.4}
    42.9{0.3}4.9{0.5}
    52.0
    {0.2}    		2.9
    {0.3}    		5.9
    {0.6}    		9.8
    {1.0}
    6
    8
    100.2
    {0.02}
    12
    139.8
    {1.0}    		19.6{2.0}
    14
    16
    180.5
    {0.05}    		1.0
    {0.1}    		2.9
    {0.3}    		3.9
    {0.4}    		4.9
    {0.5}    		14.7{1.5}29.4{3.0}
    20
    2229.4{3.0}
    27
    Fmax.F=L×75%F=L×60%F=L×45%F=L×40%F=L×40%F=L×35%F=L×30%F=L×25%

    WH: Fmax. (allowable deflection) = L×30%

    dSolid length
    (reference)    		F
    max.    		Load
    N {kgf}
    max.    		Type
    TypeD-L
    0.452.71.54.9{0.5}WH4-5*
    0.452.738.8{0.9}10*
    0.555.84.513.7{1.4}15
    0.68.4617.7{1.8}20
    0.6512.47.522.6{2.3}25
    0.6512.4926.5{2.7}30
    0.63.31.58.8{0.9}WH5-5*
    0.75.5317.7{1.8}10
    0.757.54.526.5{2.7}15
    0.757.5635.3{3.6}20
    0.8513.67.544.1{4.5}25
    0.8513.67.544.3{4.5}(30)
    0.917.18.851.6{5.3}(35)
    0.917.18.851.9{5.3}(40)
    0.653.31.58.8{0.9}WH6-5*
    0.755.2317.7{1.8}10
    0.86.44.526.5{2.7}15
    0.99.9635.3{3.6}20
    0.99.97.544.1{4.5}25
    1.016953.0{5.4}30
    1.01610.561.8{6.3}35
    1.1251270.6{7.2}40
    1.12511.366.7{6.8}(45)
    1.239.61058.8{6.0}(50)
    1.239.614.585.3{8.7}(55)
    1.239.61482.4{8.4}(60)
    1.239.61482.4{8.4}(65)
    1.239.61588.3{9.0}(70)
    0.95.4317.7{1.8}WH8-10
    1.084.526.5{2.7}15
    1.111.5635.3{3.6}20
    1.111.57.544.1{4.5}25
    1.216.8953.0{5.4}30
    1.216.810.561.8{6.3}35
    1.216.81270.6{7.2}40
    1.324.713.579.4{8.1}45
    1.324.71588.3{9.0}50
    1.43516.597.1{9.9}55
    1.43518105.9{10.8}60
    1.43517100.0{10.2}(65)
    1.43519111.8{11.4}(70)
    1.05.4317.7{1.8}WH10-10
    1.174.526.5{2.7}15
    1.29.6635.3{3.6}20
    1.29.67.544.1{4.5}25
    1.313.9953.0{5.4}30
    1.41810.561.8{6.3}35
    1.4181270.6{7.2}40
    1.52513.579.4{8.1}45
    1.5251588.3{9.0}50
    1.52516.597.1{9.9}55
    1.52518105.9{10.8}60
    1.63519.5114.7{11.7}65
    1.63521123.6{12.6}70
    1.745.924141.0{14.4}80
    dSolid length
    (reference)    		F
    max.    		Load
    N {kgf}
    max.    		Type
    TypeD-L
    1.26.9317.7{1.8}WH12-10
    1.39.14.526.5{2.7}15
    1.39.1635.3{3.6}20
    1.39.17.544.1{4.5}25
    1.411.9953.0{5.4}30
    1.411.910.561.8{6.3}35
    1.515.41270.6{7.2}40
    1.515.413.579.4{8.1}45
    1.620.41588.3{9.0}50
    1.620.416.597.1{9.9}55
    1.726.818105.9{10.8}60
    1.726.819.5114.7{11.7}65
    1.835.121123.6{12.6}70
    1.945.624141.0{14.4}80
    1.36.2329.4{3.0}WH13-10
    1.59.34.544.1{4.5}15
    1.612.3658.8{6.0}20
    1.612.37.573.5{7.5}25
    1.715988.3{9.0}30
    1.71510.5103.0{10.5}35
    1.81912117.7{12.0}40
    1.92513.5132.4{13.5}45
    1.92515147.1{15.0}50
    2.03016.5161.8{16.5}55
    2.03018176.5{18.0}60
    2.13919.5191.2{19.5}65
    2.13921205.9{21.0}70
    2.13924235.4{24.0}80
    1.610.44.544.1{4.5}WH14-15
    1.610.4658.8{6.0}20
    1.610.47.573.5{7.5}25
    1.712.8988.3{9.0}30
    1.712.810.5103.0{10.5}35
    1.92012117.7{12.0}40
    1.92013.5132.4{13.5}45
    2.130.515147.1{15.0}50
    2.130.516.5161.8{16.5}55
    2.130.518176.5{18.0}60
    2.237.419.5191.2{19.5}65
    2.237.421205.9{21.0}70
    2.347.224235.4{24.0}80
    1.710.24.544.1{4.5}WH16-15
    1.812.6658.8{6.0}20
    1.914.57.573.5{7.5}25
    1.914.5988.3{9.0}30
    2.01810.5103.0{10.5}35
    2.12112117.7{12.0}40
    2.22613.5132.4{13.5}45
    2.22615147.1{15.0}50
    2.22616.5161.8{16.5}55
    2.33218176.5{18.0}60
    2.33219.5191.2{19.5}65
    2.43821205.9{21.0}70
    2.547.524235.4{24.0}80
    dSolid length
    (reference)    		F
    max.    		Load
    N {kgf}
    max.    		Type
    TypeD-L
    2.112.6688.3{9.0}WH18-20
    2.215.47.5109.8{11.2}25
    2.215.49132.4{13.5}30
    2.318.410.5154.0{15.7}35
    2.421.612176.5{18.0}40
    2.52513.5199.1{20.3}45
    2.52515220.6{22.5}50
    2.63016.5242.2{24.7}55
    2.63018264.8{27.0}60
    2.84219.5286.4{29.2}65
    2.84221308.9{31.5}70
    2.949.324353.0{36.0}80
    3.05726.1397.2{40.5}(90)
    3.05724441.3{45.0}(100)
    2.212.7688.3{9.0}WH20-20
    2.3157.5109.8{11.2}25
    2.3159132.4{13.5}30
    2.52010.5154.0{15.7}35
    2.52012176.5{18.0}40
    2.52013.5199.1{20.3}45
    2.622.815220.6{22.5}50
    2.622.816.5242.2{24.7}55
    2.830.818264.8{27.0}60
    2.830.819.5286.4{29.2}65
    3.04221308.9{31.5}70
    3.04224353.0{36.0}80
    3.256.827397.2{40.5}90
    3.256.830441.3{45.0}100
    2.312.7688.3{9.0}WH22-20
    2.516.77.5109.8{11.2}25
    2.516.79132.4{13.5}30
    2.618.210.5154.0{15.7}35
    2.82512176.5{18.0}40
    2.82513.5199.1{20.3}45
    2.82515220.6{22.5}50
    3.03316.5242.2{24.7}55
    3.03318264.8{27.0}60
    3.03319.5286.4{29.2}65
    3.24321308.9{31.5}70
    3.24324353.0{36.0}80
    3.24326.1397.2{40.5}(90)
    3.564.426441.3{45.0}(100)
    2.816.89132.4{13.5}WH27-30
    2.816.810.5154.0{15.7}35
    2.918.812176.5{18.0}40
    2.919.413.5199.1{20.3}45
    3.225.515220.6{22.5}50
    3.225.516.5242.2{24.7}55
    3.535.518264.8{27.0}60
    3.535.519.5286.4{29.2}65
    3.535.521308.9{31.5}70
    3.535.524353.0{36.0}80
    3.535.527397.2{40.5}90
    4.06830441.3{45.0}100
    • Load calculation: load = spring constant × deflection

    (SI units) N = N/mm × F mm; kgf = kgf/mm × F mm

    (kgf=N×0.101972)

    Solid length is a reference value.

    Values vary slightly between lots.

    Service life: 1 million cycles

    Allowable deflection by size (L): WH5-30 Fmax. = L×25%, WH5-35 Fmax. = L×25%, WH5-40 Fmax. = L×22%, WH6-45 Fmax. = L×25%, WH6-50 Fmax. = L×20%, WH6-55 Fmax. = L×26%, WH6-60 Fmax. = L×23%, WH6-65 Fmax. = L×21%, WH6-70 Fmax. = L×21%, WH8-65 Fmax. = L×26%, WH8-70 Fmax. = L×27%, WH18-90 Fmax. = L×29%, WH18-100 Fmax. = L×24%, WH22-90 Fmax. = L×29%, WH22-100 Fmax. = L×26%. WH types marked * have unground end faces.

    WB: Fmax. (allowable deflection) = L×25%

    dSolid length
    (reference)    		F
    max.    		Load
    N {kgf}
    max.    		Type
    TypeD-L
    0.43.21.34.9{0.5}WB3-5*
    0.56.52.59.8{1.0}10*
    0.5510.53.814.7{1.5}15*
    0.5512.7519.6{2.0}20*
    0.617.46.324.5{2.5}25*
    0.621.07.529.4{3.0}30*
    0.6524.08.834.3{3.5}35*
    0.6527.010.039.2{4.0}40*
    0.531.35.9{0.6}WB4-5*
    0.662.512.3{1.3}10
    0.659.83.818.1{1.9}15
    0.712.6524.5{2.5}20
    0.7516.56.330.4{3.1}25
    0.7520.37.536.8{3.8}30
    0.8248.843.1{4.4}35
    0.8281049.0{5.0}40
    0.82911.355.4{5.7}45
    0.853412.561.3{6.3}50
    0.653.31.312.7{1.3}WB5-5
    0.872.524.5{2.5}10
    0.873.837.3{3.8}15
    0.913549.0{5.0}20
    0.9136.361.8{6.3}25
    1.0217.573.5{7.5}30
    1.0258.886.3{8.8}35
    1.0251098.1{10.0}40
    1.13111.3110.8{11.3}45
    1.13412.5122.6{12.5}50
    1.13913.8135.3{13.8}55
    1.14315147.1{15.0}60
    1.14616.3159.8{16.3}65
    1.25017.5171.6{17.5}70
    0.73.51.312.7{1.3}WB6-5
    0.972.524.5{2.5}10
    0.97.53.837.3{3.8}15
    1.011.5549.0{5.0}20
    1.117.56.361.8{6.3}25
    1.119.57.573.5{7.5}30
    1.1208.886.3{8.8}35
    1.2281098.1{10.0}40
    1.23011.3110.8{11.3}45
    1.23212.5122.6{12.5}50
    1.23213.8135.3{13.8}55
    1.34315147.1{15.0}60
    1.34616.3159.8{16.3}65
    1.35017.5171.6{17.5}70
    1.45720196.1{20.0}80
    1.062.524.5{2.5}WB8-10
    1.210.83.837.3{3.8}15
    1.211.5549.0{5.0}20
    1.3176.361.8{6.3}25
    1.3177.573.5{7.5}30
    1.424.58.886.3{8.8}35
    1.425.21098.1{10.0}40
    1.53211.3110.8{11.3}45
    1.53312.5122.6{12.5}50
    1.536.513.8135.3{13.8}55
    1.536.515147.1{15.0}60
    1.64816.3159.8{16.3}65
    1.64817.5171.6{17.5}70
    1.65520196.1{20.0}80
    dSolid length
    (reference)    		F
    max.    		Load
    N {kgf}
    max.    		Type
    TypeD-L
    1.262.524.5{2.5}WB10-10
    1.38.53.837.3{3.8}15
    1.412549.0{5.0}20
    1.516.56.361.8{6.3}25
    1.5177.573.5{7.5}30
    1.6238.886.3{8.8}35
    1.6241098.1{10.0}40
    1.73011.3110.8{11.3}45
    1.731.512.5122.6{12.5}50
    1.84013.8135.3{13.8}55
    1.84015147.1{15.0}60
    1.84316.3159.8{16.3}65
    1.84317.5171.6{17.5}70
    1.85420196.1{20.0}80
    1.46.52.524.5{2.5}WB12-10
    1.47.73.836.3{3.7}15
    1.612.5549.0{5.0}20
    1.613.66.360.8{6.2}25
    1.7187.573.5{7.5}30
    1.822.58.885.3{8.7}35
    1.8241098.1{10.0}40
    1.82411.3109.8{11.2}45
    1.93412.5122.6{12.5}50
    2.03813.8134.4{13.7}55
    2.04015147.1{15.0}60
    2.04216.3158.9{16.2}65
    2.148.517.5171.6{17.5}70
    2.152.520196.1{20.0}80
    1.66.42.549.0{5.0}WB13-10
    1.8113.874.5{7.6}15
    1.811598.1{10.0}20
    2.0176.3123.6{12.6}25
    2.0187.5147.1{15.0}30
    2.1228.8172.6{17.6}35
    2.12210196.1{20.0}40
    2.33211.3221.6{22.6}45
    2.33212.5245.2{25.0}50
    2.44013.8270.7{27.6}55
    2.44215294.2{30.0}60
    2.44216.3319.7{32.6}65
    2.55017.5343.2{35.0}70
    2.55020392.3{40.0}80
    1.893.872.6{7.4}WB14-15
    2.013598.1{10.0}20
    2.0146.3121.6{12.4}25
    2.1187.5147.1{15.0}30
    2.1238.8170.6{17.4}35
    2.326.310196.1{20.0}40
    2.327.611.3219.7{22.4}45
    2.43112.5245.2{25.0}50
    2.537.513.8268.7{27.4}55
    2.54115294.2{30.0}60
    2.543.516.3317.7{32.4}65
    2.64817.5343.2{35.0}70
    2.65220392.3{40.0}80
    dSolid length
    (reference)    		F
    max.    		Load
    N {kgf}
    max.    		Type
    TypeD-L
    2.0103.874.5{7.6}WB16-15
    2.112.5598.1{10.0}20
    2.3176.3123.6{12.6}25
    2.318.57.5147.1{15.0}30
    2.421.58.8172.6{17.6}35
    2.421.510196.1{20.0}40
    2.527.511.3221.6{22.6}45
    2.527.512.5245.2{25.0}50
    2.63213.8270.7{27.6}55
    2.63215294.2{30.0}60
    2.84616.3319.7{32.6}65
    2.84617.5343.2{35.0}70
    2.95520392.3{40.0}80
    2.513.55147.1{15.0}WB18-20
    2.6176.3185.3{18.9}25
    2.6177.5220.6{22.5}30
    2.823.58.8258.9{26.4}35
    2.927.510294.2{30.0}40
    2.927.511.3332.4{33.9}45
    3.03312.5367.7{37.5}50
    3.03313.8406.0{41.4}55
    3.24315441.3{45.0}60
    3.244.516.3479.5{48.9}65
    3.244.517.5514.8{52.5}70
    3.45820588.4{60.0}80
    3.46122.5661.9{67.5}90
    3.57125735.5{75.0}100
    2.813.55147.1{15.0}WB22-20
    2.9166.3185.3{18.9}25
    3.0187.5220.6{22.5}30
    3.0188.8258.9{26.4}35
    3.22410294.2{30.0}40
    3.22411.3332.4{33.9}45
    3.53612.5367.7{37.5}50
    3.53613.8406.0{41.4}55
    3.53615441.3{45.0}60
    3.64516.3479.5{48.9}65
    3.64517.5514.8{52.5}70
    3.85720588.4{60.0}80
    3.85722.5661.9{67.5}90
    4.07225735.5{75.0}100
    3.5197.5220.6{22.5}WB27-30
    3.6218.8258.9{26.4}35
    3.62110294.2{30.0}40
    3.83011.3332.4{33.9}45
    3.83012.5367.7{37.5}50
    4.03813.8406.0{41.4}55
    4.03815441.3{45.0}60
    4.03816.3479.5{48.9}65
    4.03817.5514.8{52.5}70
    4.35720588.4{60.0}80
    4.56322.5661.9{67.5}90
    4.56725735.5{75.0}100
    • Load calculation: load = spring constant × deflection

    WB types marked * have unground end faces.