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    110 Products

    Constant-Force Strip Springs

    Image of Product. Front orientation. Strip Springs. Constant-Force Strip Springs.
    No matter how far you extend them, these springs pull back with the same amount of force. Compact and tightly coiled, these springs extend to multiple times their length to pull objects in a linear direction. All are stainless steel for corrosion resistance. Please allow for 1 ½ coils on the shaft at full extension to hold the spring in place.
    Extended
    Lg.
    Load,
    lb.
    Wt. Load Tolerance,
    lb.
    Thk.
    Wd.
    ID
    ID Tolerance
    OD
    OD Tolerance
    Mounting
    Hole Dia.
    No. of Mounting
    Holes
    Material
    Each
    3,000 Cycle Useful Life
    12"0.37-0.04 to 0.040.003"0.187"0.21"-0.03" to 0.03"0.3"-0.03" to 0.03"0.096"1301 Stainless Steel
    0000000000000
    12"1.23-0.12 to 0.120.005"0.375"0.38"0.47"0.131"1301 Stainless Steel
    000000000000
    15"0.49-0.05 to 0.050.004"0.187"0.29"-0.03" to 0.03"0.4"-0.04" to 0.04"0.096"1301 Stainless Steel
    000000000000
    15"0.66-0.07 to 0.070.004"0.25"0.28"-0.03" to 0.03"0.4"-0.04" to 0.04"0.13"1301 Stainless Steel
    00000000000
    15"0.83-0.09 to 0.090.004"0.312"0.28"-0.03" to 0.03"0.4"-0.04" to 0.04"0.13"1301 Stainless Steel
    000000000000
    17"1.03-0.11 to 0.110.005"0.312"0.37"-0.04" to 0.04"0.5"-0.05" to 0.05"0.13"1301 Stainless Steel
    00000000000
    18"0.75-0.08 to 0.080.005"0.31"0.42"-0.05" to 0.05"0.56"-0.06" to 0.06"0.131"1301 Stainless Steel
    0000000000000
    22"1.12-0.12 to 0.120.006"0.37"0.51"-0.06" to 0.06"0.62"-0.07" to 0.07"0.131"1301 Stainless Steel
    000000000000
    22"2.3-0.23 to 0.230.007"0.5"0.5"0.7"0.191"1301 Stainless Steel
    000000000000
    22"2.87-0.28 to 0.280.007"0.625"0.5"0.71"0.191"1301 Stainless Steel
    000000000000
    24"1.48-0.15 to 0.150.006"0.375"0.45"-0.05" to 0.05"0.62"-0.07" to 0.07"0.196"1301 Stainless Steel
    000000000000
    24"4-0.4 to 0.400.009"0.75"0.62"-0.07" to 0.07"0.82"-0.09" to 0.09"0.196"1301 Stainless Steel
    0000000000000
    24"4.93-0.49 to 0.490.012"0.625"0.86"1.11"0.191"1301 Stainless Steel
    000000000000
    25"1.97-0.2 to 0.200.006"0.5"0.45"-0.05" to 0.05"0.65"-0.07" to 0.07"0.196"1301 Stainless Steel
    000000000000
    26"1.62-0.17 to 0.170.007"0.5"0.59"-0.06" to 0.06"0.75"-0.08" to 0.08"0.131"1301 Stainless Steel
    000000000000
    28"6.88-0.69 to 0.690.014"0.75"1"1.29"0.191"1301 Stainless Steel
    000000000000
    28"9.19-0.92 to 0.920.014"1"1.1"1.31"0.191"1301 Stainless Steel
    000000000000
    30"2.63-0.27 to 0.270.008"0.5"0.59"-0.06" to 0.06"0.82"-0.09" to 0.09"0.196"1301 Stainless Steel
    00000000000
    30"3.29-0.33 to 0.330.008"0.625"0.61"-0.07" to 0.07"0.83"-0.09" to 0.09"0.196"1301 Stainless Steel
    000000000000
    32"14.76-1.5 to 1.500.018"1.25"1.28"1.65"0.191"1301 Stainless Steel
    000000000000
    32"17.71-1.7 to 1.700.018"1.5"1.38"1.64"0.256"2301 Stainless Steel
    000000000000
    33"4.12-0.42 to 0.420.01"0.625"0.73"-0.08" to 0.08"0.99"-0.1" to 0.10"0.196"1301 Stainless Steel
    00000000000
    33"4.95-0.5 to 0.500.01"0.75"0.71"-0.08" to 0.08"0.97"-0.1" to 0.10"0.196"1301 Stainless Steel
    0000000000000
    34"3.5-0.35 to 0.350.01"0.68"0.85"-0.09" to 0.09"1.12"-0.12" to 0.12"0.187"1301 Stainless Steel
    0000000000000
    36"28.71-2.87 to 2.870.025"1.75"1.88"2.16"0.256"2301 Stainless Steel
    000000000000
    36"32.81-3.28 to 3.280.025"2"1.78"2.11"0.256"2301 Stainless Steel
    0000000000000
    38"5-0.5 to 0.500.012"0.81"1.02"-0.11" to 0.11"1.4"-0.14" to 0.14"0.187"1301 Stainless Steel
    0000000000000
    39"5.94-0.6 to 0.600.012"0.75"0.88"-0.09" to 0.09"1.19"-0.12" to 0.12"0.196"1301 Stainless Steel
    000000000000
    39"7.92-0.8 to 0.800.012"1"0.88"-0.09" to 0.09"1.2"-0.12" to 0.12"0.196"1301 Stainless Steel
    0000000000000
    40"10.6-1.06 to 1.060.016"1"1.2"-0.12" to 0.12"1.52"-0.16" to 0.16"0.196"1301 Stainless Steel
    000000000000
    43"7-0.7 to 0.700.014"1"1.19"-0.12" to 0.12"1.5"-0.15" to 0.15"0.187"1301 Stainless Steel
    000000000000
    50"16.5-1.65 to 1.650.02"1.25"1.47"-0.15" to 0.15"1.89"-0.19" to 0.19"0.196"1301 Stainless Steel
    0000000000000
    52"24.8-2.48 to 2.480.025"1.5"1.77"-0.18" to 0.18"2.23"-0.23" to 0.23"0.265"2301 Stainless Steel
    000000000000
    52"33-0.33 to 0.330.025"2"1.78"-0.18" to 0.18"2.22"-0.22" to 0.22"0.265"2301 Stainless Steel
    0000000000000
    60"40.9-4.09 to 4.090.031"2"2.5"-0.25" to 0.25"3.03"-0.31" to 0.31"0.265"2301 Stainless Steel
    000000000000
     
    25,000 Cycle Useful Life
    18"0.23-0.03 to 0.030.004"0.25"0.53"-0.06" to 0.06"0.62"-0.07" to 0.07"0.13"1301 Stainless Steel
    000000000000
    18"0.36-0.04 to 0.040.005"0.312"0.69"-0.07" to 0.07"0.78"-0.08" to 0.08"0.13"1301 Stainless Steel
    000000000000
    25"0.43-0.05 to 0.050.005"0.375"0.65"-0.07" to 0.07"0.78"-0.08" to 0.08"0.13"1301 Stainless Steel
    000000000000
    25"0.52-0.06 to 0.060.006"0.375"0.7"-0.07" to 0.07"0.9"-0.09" to 0.09"0.196"1301 Stainless Steel
    000000000000
    25"0.7-0.07 to 0.070.006"0.5"0.8"-0.08" to 0.08"0.92"-0.1" to 0.10"0.196"1301 Stainless Steel
    00000000000
    33"0.93-0.1 to 0.100.008"0.5"1.07"-0.11" to 0.11"1.23"-0.13" to 0.13"0.196"1301 Stainless Steel
    00000000000
    35"1.46-0.15 to 0.150.01"0.625"1.36"-0.14" to 0.14"1.53"-0.16" to 0.16"0.196"1301 Stainless Steel
    00000000000
    45"2.09-0.21 to 0.210.012"0.75"1.6"-0.16" to 0.16"1.82"-0.19" to 0.19"0.196"1301 Stainless Steel
    000000000000
    45"2.8-0.28 to 0.280.012"1"1.6"-0.16" to 0.16"1.84"-0.19" to 0.19"0.196"1301 Stainless Steel
    0000000000000
    46"4.1-0.41 to 0.410.016"1"1.96"-0.2" to 0.20"2.21"-0.23" to 0.23"0.196"1301 Stainless Steel
    000000000000
    48"3.5-0.35 to 0.350.015"1"1.96"-0.2" to 0.20"2.2"-0.22" to 0.22"0.196"1301 Stainless Steel
    0000000000000
    48"3.86-0.39 to 0.390.016"1.25"2.28"2.52"0.191"1301 Stainless Steel
    0000000000000
    48"4.37-0.44 to 0.440.015"1.25"2.03"-0.21" to 0.21"2.29"-0.23" to 0.23"0.196"1301 Stainless Steel
    0000000000000
    48"5.21-0.52 to 0.520.018"1.5"2.65"2.86"0.256"2301 Stainless Steel
    0000000000000
    55"5.83-0.59 to 0.590.02"1.25"2.53"-0.26" to 0.26"2.82"-0.29" to 0.29"0.196"1301 Stainless Steel
    000000000000
    56"7.24-0.72 to 0.720.025"1.5"3.54"3.75"0.256"2301 Stainless Steel
    0000000000000
    60"8.74-0.88 to 0.880.025"1.5"3.35"-0.34" to 0.34"3.7"-0.37" to 0.37"0.265"2301 Stainless Steel
    000000000000
    60"11.7-1.17 to 1.170.025"2"3.37"-0.34" to 0.34"3.68"-0.37" to 0.37"0.265"2301 Stainless Steel
    0000000000000
    70"14.4-1.44 to 1.440.031"2"4.35"-0.44" to 0.44"4.74"-0.48" to 0.48"0.265"2301 Stainless Steel
    000000000000
     
    50,000 Cycle Useful Life
    30"0.44-0.07 to 0.070.006"0.5"1"-0.1" to 0.10"1.22"-0.13" to 0.13"0.196"1301 Stainless Steel
    00000000000
    36"0.58-0.09 to 0.090.008"0.5"1.49"-0.15" to 0.15"1.61"-0.17" to 0.17"0.196"1301 Stainless Steel
    00000000000
    50"1.31-0.2 to 0.200.012"0.75"2.24"-0.23" to 0.23"2.4"-0.24" to 0.24"0.196"1301 Stainless Steel
    000000000000
     

    Constant-Force Retractors

    Image of Product. Front orientation. Constant-Force Retractors. Right Cable Exit.
    Image of Product. Front orientation. Constant-Force Retractors. Left Cable Exit.

    Right Cable Exit

    Left Cable Exit

    For controlled extension and retraction, these retractors provide the same amount of force no matter how far you extend them. The flexible attachment cable allows a wider range of movement than standard constant-force springs.
    Cable
    Spring
    Housing
    Storage
    Drums
    Mounting
    Holes
    Tension,
    lb.
    Travel,
    ft.
    Dia.
    Material
    Torque,
    in·lbf
    Material
    Ht.
    Wd.
    Dp.
    Material
    No.
    of
    Material
    Mounting Fasteners
    Included
    Dia.
    No.
    of
    Each
    Right Cable Exit
    0.37531/16"Nylon
    0.10Stainless Steel
    1 1/2"1"1/2"Stainless Steel
    1Nylon
    00000000000000
    161/16"Stainless Steel
    0.78Stainless Steel
    3 3/4"2 1/2"1 1/4"Zinc-Plated Steel1Acetal
    No11/64"40000000000000
    261/16"Stainless Steel
    1.56Stainless Steel
    3 3/4"2 1/2"1 1/4"Zinc-Plated Steel1Acetal
    No11/64"40000000000000
    361/16"Stainless Steel
    2.33Stainless Steel
    3 3/4"2 1/2"1 1/4"Zinc-Plated Steel2Acetal
    No11/64"40000000000000
    3223/64"Steel3.63Stainless Steel
    6 1/4"3 1/4"2 1/4"Zinc-Plated Steel1Acetal
    No11/64"6000000000000000
    461/16"Stainless Steel
    3.12Stainless Steel
    3 3/4"2 1/2"1 1/4"Zinc-Plated Steel2Acetal
    No11/64"40000000000000
    561/16"Stainless Steel
    3.90Stainless Steel
    3 3/4"2 1/2"1 1/4"Zinc-Plated Steel2Acetal
    No11/64"40000000000000
    5193/64"Steel5.62Stainless Steel
    6 1/4"3 1/4"2 1/4"Zinc-Plated Steel1Acetal
    No11/64"6000000000000000
    7.533/64"Steel6.65Stainless Steel
    5 1/4"2 3/4"2 1/4"Zinc-Plated Steel1Acetal
    No11/64"6000000000000000
    7.5173/64"Steel8.06Stainless Steel
    6 1/4"3 1/4"2 1/4"Zinc-Plated Steel1Acetal
    No11/64"6000000000000000
    1033/64"Steel7.95Stainless Steel
    5 1/4"2 3/4"2 1/4"Zinc-Plated Steel1Acetal
    No11/64"6000000000000000
    10153/64"Steel10.60Stainless Steel
    6 1/4"3 1/4"2 1/4"Zinc-Plated Steel1Acetal
    No11/64"6000000000000000
    13.5133/64"Steel13.90Stainless Steel
    6 1/4"3 1/4"2 1/4"Zinc-Plated Steel1Acetal
    No11/64"6000000000000000
    1523/64"Steel11.90Stainless Steel
    5 1/4"2 3/4"2 1/4"Zinc-Plated Steel1Acetal
    No11/64"6000000000000000
    15133/64"Steel15.50Stainless Steel
    6 1/4"3 1/4"2 1/4"Zinc-Plated Steel1Acetal
    No11/64"6000000000000000
     
    Left Cable Exit
    3223/64"Steel3.63Stainless Steel
    6 1/4"3 1/4"2 1/4"Zinc-Plated Steel1Acetal
    No11/64"6000000000000000
    5193/64"Steel5.62Stainless Steel
    6 1/4"3 1/4"2 1/4"Zinc-Plated Steel1Acetal
    No11/64"6000000000000000
    7.5173/64"Steel8.06Stainless Steel
    6 1/4"3 1/4"2 1/4"Zinc-Plated Steel1Acetal
    No11/64"6000000000000000
    1033/64"Steel7.95Stainless Steel
    5 1/4"2 3/4"2 1/4"Zinc-Plated Steel1Acetal
    No11/64"6000000000000000
    10153/64"Steel10.60Stainless Steel
    6 1/4"3 1/4"2 1/4"Zinc-Plated Steel1Acetal
    No11/64"6000000000000000
    13.5133/64"Steel13.90Stainless Steel
    6 1/4"3 1/4"2 1/4"Zinc-Plated Steel1Acetal
    No11/64"6000000000000000
    1523/64"Steel11.90Stainless Steel
    5 1/4"2 3/4"2 1/4"Zinc-Plated Steel1Acetal
    No11/64"6000000000000000
    15133/64"Steel15.50Stainless Steel
    6 1/4"3 1/4"2 1/4"Zinc-Plated Steel1Acetal
    No11/64"6000000000000000
     

    Rotor Springs

    Image of Product. Front orientation. Rotor Springs.
    Wind these springs to store power, then release them to create rotary motion—similar to winding a wristwatch. Also known as clock springs and power springs. All are stainless steel for corrosion resistance.
    Max. Torque,
    in·lbf
    For Shaft
    Dia.
    OD
    Wd.
    Thk.
    No. of
    Turns
    Material
    Each
    0.411/4"1.5"0.5"0.004"44301 Stainless Steel
    0000000000000
    0.731/4"1"0.25"0.0075"11.5301 Stainless Steel
    000000000000
    0.931/4"1.5"0.5"0.006"30301 Stainless Steel
    000000000000
    1.651/4"1.5"0.5"0.008"22301 Stainless Steel
    000000000000
    2.581/4"1.5"0.5"0.01"17301 Stainless Steel
    000000000000
    4.25/8"2.8"0.25"0.018"14301 Stainless Steel
    000000000000
    4.321/4"1.5"0.5"0.013"11.5301 Stainless Steel
    000000000000
    4.51/4"1.8"0.375"0.016"12301 Stainless Steel
    000000000000
    71/4"1.8"0.375"0.02"9301 Stainless Steel
    000000000000
    8.35/8"3"0.5"0.018"16.5301 Stainless Steel
    0000000000000

    Clip-On Constant-Force Strip Springs

    Image of Product. Front orientation. Strip Springs. Clip-On Constant-Force Strip Springs.
    Clip the end onto a flat surface to install—no fasteners needed. Once installed, these springs pull back with the same amount of force no matter how far you extend them. Compact and tightly coiled, they extend to multiple times their length to pull objects in a linear direction. All are stainless steel for corrosion resistance. When using, please allow for 1 ½ extra coils on the shaft at full extension to hold the spring in place.
    Extended
    Lg.
    Load,
    lb.
    Wt. Load Tolerance,
    lb.
    Thk.
    Wd.
    ID
    ID Tolerance
    OD
    OD Tolerance
    For Max. Mounting
    Surface Thk.
    Material
    Each
    5,000 Cycle Useful Life
    24"1.5-0.15 to 0.150.006"0.5"0.53"-0.05" to 0.05"0.68"-0.031" to 0.03"0.138"301 Stainless Steel
    00000000000
    24"1.75-0.17 to 0.170.007"0.5"0.63"-0.05" to 0.05"0.725"-0.031" to 0.03"0.136"301 Stainless Steel
    0000000000
     
    13,000 Cycle Useful Life
    24"0.2-0.02 to 0.020.003"0.25"0.35"-0.02" to 0.02"0.45"-0.031" to 0.03"0.119"301 Stainless Steel
    0000000000
    24"0.4-0.04 to 0.040.004"0.25"0.4"-0.04" to 0.04"0.55"-0.031" to 0.03"0.117"301 Stainless Steel
    0000000000
    24"0.6-0.06 to 0.060.005"0.25"0.45"-0.05" to 0.05"0.6"-0.031" to 0.03"0.115"301 Stainless Steel
    0000000000
    24"0.8-0.08 to 0.080.005"0.312"0.5"-0.05" to 0.05"0.675"-0.031" to 0.03"0.115"301 Stainless Steel
    0000000000
    24"1-0.1 to 0.100.006"0.312"0.51"-0.05" to 0.05"0.6"-0.031" to 0.03"0.138"301 Stainless Steel
    0000000000
    24"1.25-0.12 to 0.120.006"0.375"0.55"-0.05" to 0.05"0.675"-0.031" to 0.03"0.138"301 Stainless Steel
    0000000000
     

    Variable-Force Strip Springs

    Image of Product. Front orientation. Strip Springs. Variable-Force Strip Springs.
    Compared to constant-force springs, these are easier to pull at first but become harder to pull the farther you extend them. Use them for applications where the load becomes lighter as the spring contracts, such as in automated dispensing machines. All are stainless steel for corrosion resistance. Please allow for 1 ½ coils on the shaft at full extension to hold the spring in place.
    Wt. Load,
    lb.
    Extended
    Lg.
    Thk.
    Wd.
    ID
    OD
    OD Tolerance
    Mounting
    Hole Dia.
    No. of Mounting
    Holes
    Material
    Each
    5,000 Cycle Useful Life
    0.5 to 1.0022"0.0045"0.5"0.4"0.85"-0.031" to 0.03"0.191"1301 Stainless Steel
    00000000000
    0.55 to 1.2028"0.0045"0.5"0.4"0.73"-0.031" to 0.03"0.191"1301 Stainless Steel
    0000000000
    0.75 to 1.5022"0.005"0.5"0.5"0.8"-0.031" to 0.03"0.191"1301 Stainless Steel
    0000000000
    0.9 to 1.8022"0.007"0.5"0.5"1.125"-0.031" to 0.03"0.191"1301 Stainless Steel
    0000000000
    1 to 2.2022"0.007"0.5"0.55"1.03"-0.031" to 0.03"0.191"1301 Stainless Steel
    00000000000
    1 to 2.2028"0.007"0.5"0.55"0.95"-0.031" to 0.03"0.191"1301 Stainless Steel
    0000000000
    1.5 to 2.6022"0.008"0.5"0.63"1.2"-0.031" to 0.03"0.191"1301 Stainless Steel
    00000000000
    1.5 to 2.6028"0.008"0.5"0.63"1.275"-0.031" to 0.03"0.191"1301 Stainless Steel
    0000000000
    1.75 to 3.3022"0.01"0.5"0.98"1.38"-0.031" to 0.03"0.191"1301 Stainless Steel
    00000000000
    1.75 to 3.3028"0.01"0.5"0.98"1.46"-0.031" to 0.03"0.191"1301 Stainless Steel
    0000000000
    2 to 4.0028"0.012"0.5"0.95"1.55"-0.031" to 0.03"0.191"1301 Stainless Steel
    0000000000
     
    7,500 Cycle Useful Life
    0.55 to 1.0028"0.0045"0.5"0.4"0.8"-0.031" to 0.03"0.191"1301 Stainless Steel
    0000000000
     
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