Load Load |
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Extended Length Extended Length |
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OD OD |
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ID ID |
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Material Material |
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DFARS (Defense Acquisition Regulations Supplement) DFARS (Defense AcquisitionRegulations Supplement)  |
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REACH (Registration, Evaluation, Authorization and Restriction of Chemicals) REACH (Registration,Evaluation, Authorization and Restriction of Chemicals) |
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RoHS (Restriction of Hazardous Substances) RoHS (Restriction ofHazardous Substances) |
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Useful Life Useful Life |
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Thickness Thickness |
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Specifications Met Specifications Met |
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Interlocking Test Weights
Stack multiple grooved weights together to calibrate your scales. Weights are marked with their weight.
Optional hangers (sold separately) let you test and calibrate hanging scales.
For technical drawings and 3-D models, click on a part number.
Weights
Shown with Optional Hanger
| Wt. | Tolerance | Dia. | Ht. | Slot Width | Material | Class | Specifications Met | Each | |
| 1/2 lbs. | -0.0001 lbs. to 0.0001 lbs. | 3 3/4" | 5/16" | 9/16" | Cast Iron | 6 | ASTM Class 6 Tolerances | 0000000 | 000000 |
| 1 lbs. | -0.00015 lbs. to 0.00015 lbs. | 5" | 5/16" | 9/16" | Cast Iron | 6 | ASTM Class 6 Tolerances | 0000000 | 00000 |
| 2 lbs. | -0.0002 lbs. to 0.0002 lbs. | 5" | 9/16" | 9/16" | Cast Iron | 6 | ASTM Class 6 Tolerances | 0000000 | 00000 |
| 5 lbs. | -0.0005 lbs. to 0.0005 lbs. | 5" | 1 1/8" | 9/16" | Cast Iron | 6 | ASTM Class 6 Tolerances | 0000000 | 00000 |
| 10 lbs. | -0.001 lbs. to 0.001 lbs. | 6" | 1 1/2" | 9/16" | Cast Iron | 6 | ASTM Class 6 Tolerances | 0000000 | 000000 |
| 20 lbs. | -0.002 lbs. to 0.002 lbs. | 8" | 1 7/8" | 9/16" | Cast Iron | 6 | ASTM Class 6 Tolerances | 0000000 | 000000 |
| 50 lbs. | -0.005 lbs. to 0.005 lbs. | 10 1/4" | 2 3/4" | 9/16" | Cast Iron | 6 | ASTM Class 6 Tolerances | 0000000 | 000000 |
| 500 g | -0.05 g to 0.05 g | 5" | 5/16" | 9/16" | Cast Iron | 6 | ASTM Class 6 Tolerances | 0000000 | 00000 |
| 1 kg | -0.0001 kg to 0.0001 kg | 5" | 9/16" | 9/16" | Cast Iron | 6 | ASTM Class 6 Tolerances | 0000000 | 00000 |
| 2 kg | -0.0002 kg to 0.0002 kg | 5" | 1" | 9/16" | Cast Iron | 6 | ASTM Class 6 Tolerances | 0000000 | 00000 |
| 5 kg | -0.0005 kg to 0.0005 kg | 6" | 1 11/16" | 9/16" | Cast Iron | 6 | ASTM Class 6 Tolerances | 0000000 | 000000 |
| 10 kg | -0.001 kg to 0.001 kg | 8" | 1 15/16" | 9/16" | Cast Iron | 6 | ASTM Class 6 Tolerances | 0000000 | 000000 |
| 20 kg | -0.002 kg to 0.002 kg | 10 1/4" | 2 3/8" | 9/16" | Cast Iron | 6 | ASTM Class 6 Tolerances | 0000000 | 000000 |
Interlocking Test Weights with Calibration Certificate
These test weights come with a certificate of calibration traceable to NIST that states they’ve passed a test for accuracy. Stack multiple weights together to calibrate your scales. Weights are marked with their weight.
For technical drawings and 3-D models, click on a part number.
Shown with Optional Hanger
| Wt. | Tolerance | Dia. | Ht. | Slot Width | Material | Class | Specifications Met | Each | |
| 1/2 lbs. | -0.0001 lbs. to 0.0001 lbs. | 3 3/4" | 5/16" | 9/16" | Cast Iron | 6 | ASTM Class 6 Tolerances | 0000000 | 0000000 |
| 1 lbs. | -0.00015 lbs. to 0.00015 lbs. | 5" | 5/16" | 9/16" | Cast Iron | 6 | ASTM Class 6 Tolerances | 0000000 | 000000 |
| 2 lbs. | -0.0002 lbs. to 0.0002 lbs. | 5" | 9/16" | 9/16" | Cast Iron | 6 | ASTM Class 6 Tolerances | 0000000 | 000000 |
| 5 lbs. | -0.0005 lbs. to 0.0005 lbs. | 5" | 1 1/8" | 9/16" | Cast Iron | 6 | ASTM Class 6 Tolerances | 0000000 | 000000 |
| 10 lbs. | -0.001 lbs. to 0.001 lbs. | 6" | 1 1/2" | 9/16" | Cast Iron | 6 | ASTM Class 6 Tolerances | 0000000 | 000000 |
| 20 lbs. | -0.002 lbs. to 0.002 lbs. | 8" | 1 7/8" | 9/16" | Cast Iron | 6 | ASTM Class 6 Tolerances | 0000000 | 000000 |
| 50 lbs. | -0.005 lbs. to 0.005 lbs. | 10 1/4" | 2 3/4" | 9/16" | Cast Iron | 6 | ASTM Class 6 Tolerances | 0000000 | 000000 |
| 500 g | -0.05 g to 0.05 g | 5" | 5/16" | 9/16" | Cast Iron | 6 | ASTM Class 6 Tolerances | 0000000 | 000000 |
| 1 kg | -0.0001 kg to 0.0001 kg | 5" | 9/16" | 9/16" | Cast Iron | 6 | ASTM Class 6 Tolerances | 0000000 | 000000 |
| 2 kg | -0.0002 kg to 0.0002 kg | 5" | 1" | 9/16" | Cast Iron | 6 | ASTM Class 6 Tolerances | 0000000 | 000000 |
| 5 kg | -0.0005 kg to 0.0005 kg | 6" | 1 11/16" | 9/16" | Cast Iron | 6 | ASTM Class 6 Tolerances | 0000000 | 000000 |
| 10 kg | -0.001 kg to 0.001 kg | 8" | 1 15/16" | 9/16" | Cast Iron | 6 | ASTM Class 6 Tolerances | 0000000 | 000000 |
| 20 kg | -0.002 kg to 0.002 kg | 10 1/4" | 2 3/8" | 9/16" | Cast Iron | 6 | ASTM Class 6 Tolerances | 0000000 | 000000 |
Counterbalance Weights for Beam Scales
Add these stackable weights to the end of a beam scale to increase its total capacity. They’re also known as counterpoise weights. All are marked with their weight.
Optional hangers (sold separately) let you hang weights on beam scales.
Weights
Shown with Optional Hanger
| Wt. | Increased Capacity | Tolerance | Dia. | Ht. | Slot Wd. | Material | Class | Specifications Met | Each | |
| 0.5 lbs. | 50 lbs. | -0.01 lbs. to 0.01 lbs. | 2 7/8" | 9/16" | 1/2" | Cast Iron | 7 | ASTM Class 7 Tolerances | 0000000 | 000000 |
| 0.5 lbs. | 100 lbs. | -0.01 lbs. to 0.01 lbs. | 2 7/8" | 9/16" | 1/2" | Cast Iron | 7 | ASTM Class 7 Tolerances | 0000000 | 00000 |
| 1 lbs. | 100 lbs. | -0.01 lbs. to 0.01 lbs. | 4 1/16" | 5/8" | 1/2" | Cast Iron | 7 | ASTM Class 7 Tolerances | 0000000 | 00000 |
| 1 lbs. | 200 lbs. | -0.02 lbs. to 0.02 lbs. | 3 17/32" | 1/2" | 1/2" | Cast Iron | 7 | ASTM Class 7 Tolerances | 0000000 | 00000 |
| 2 lbs. | 200 lbs. | -0.02 lbs. to 0.02 lbs. | 4 1/16" | 15/16" | 1/2" | Cast Iron | 7 | ASTM Class 7 Tolerances | 0000000 | 00000 |
| 5 lbs. | 500 lbs. | -0.1 lbs. to 0.1 lbs. | 3 3/4" | 2 3/16" | 1/2" | Cast Iron | 7 | ASTM Class 7 Tolerances | 0000000 | 00000 |
Optional Hanger
| Wt. | Capacity | Dia. | Ht. | Each | |
| 7 oz. | 50 lbs. | 4" | 5 1/8" | 0000000 | 000000 |
Constant-Force 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 1/2 coils on the shaft at full extension to hold the spring in place.
For technical drawings and 3-D models, click on a part number.
| Extended Lg. | Load, lbs. | Load Tolerance, lbs. | Thick. | Wd. | ID | ID Tolerance | OD | OD Tolerance | Mounting Hole Dia. | Number of Mounting Holes | Material | Each | |
3,000 Cycles of Useful Life | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 12" | 0.37 | -0.04 to 0.04 | 0.003" | 0.187" | 0.21" | -0.03" to 0.03" | 0.3" | -0.03" to 0.03" | 0.096" | 1 | 301 Stainless Steel | 00000000 | 00000 |
| 12" | 1.23 | -0.12 to 0.12 | 0.005" | 0.375" | 0.36" | -0.032" to 0.03" | 0.47" | -0.03" to 0.03" | 0.131" | 1 | 301 Stainless Steel | 00000000 | 0000 |
| 15" | 0.49 | -0.05 to 0.05 | 0.004" | 0.187" | 0.29" | -0.03" to 0.03" | 0.4" | -0.04" to 0.04" | 0.096" | 1 | 301 Stainless Steel | 00000000 | 0000 |
| 15" | 0.66 | -0.07 to 0.07 | 0.004" | 0.25" | 0.28" | -0.03" to 0.03" | 0.4" | -0.04" to 0.04" | 0.13" | 1 | 301 Stainless Steel | 0000000 | 0000 |
| 15" | 0.83 | -0.09 to 0.09 | 0.004" | 0.312" | 0.28" | -0.03" to 0.03" | 0.4" | -0.04" to 0.04" | 0.13" | 1 | 301 Stainless Steel | 00000000 | 0000 |
| 17" | 1.03 | -0.11 to 0.11 | 0.005" | 0.312" | 0.37" | -0.04" to 0.04" | 0.5" | -0.05" to 0.05" | 0.13" | 1 | 301 Stainless Steel | 0000000 | 0000 |
| 18" | 0.75 | -0.08 to 0.08 | 0.005" | 0.31" | 0.42" | -0.05" to 0.05" | 0.56" | -0.06" to 0.06" | 0.131" | 1 | 301 Stainless Steel | 00000000 | 00000 |
| 22" | 1.12 | -0.12 to 0.12 | 0.006" | 0.37" | 0.51" | -0.06" to 0.06" | 0.62" | -0.07" to 0.07" | 0.131" | 1 | 301 Stainless Steel | 0000000 | 00000 |
| 22" | 2.3 | -0.23 to 0.23 | 0.007" | 0.5" | 0.5" | -0.032" to 0.03" | 0.72" | -0.03" to 0.03" | 0.191" | 1 | 301 Stainless Steel | 00000000 | 0000 |
| 22" | 2.87 | -0.28 to 0.28 | 0.007" | 0.625" | 0.5" | -0.04" to 0.04" | 0.71" | -0.03" to 0.03" | 0.191" | 1 | 301 Stainless Steel | 00000000 | 0000 |
| 24" | 1.48 | -0.15 to 0.15 | 0.006" | 0.375" | 0.45" | -0.05" to 0.05" | 0.62" | -0.07" to 0.07" | 0.196" | 1 | 301 Stainless Steel | 00000000 | 0000 |
| 24" | 4 | -0.4 to 0.40 | 0.009" | 0.75" | 0.62" | -0.07" to 0.07" | 0.82" | -0.09" to 0.09" | 0.196" | 1 | 301 Stainless Steel | 00000000 | 00000 |
| 24" | 4.93 | -0.49 to 0.49 | 0.012" | 0.625" | 0.86" | -0.04" to 0.04" | 1.05" | -0.03" to 0.03" | 0.191" | 1 | 301 Stainless Steel | 00000000 | 0000 |
| 25" | 1.97 | -0.2 to 0.20 | 0.006" | 0.5" | 0.45" | -0.05" to 0.05" | 0.65" | -0.07" to 0.07" | 0.196" | 1 | 301 Stainless Steel | 00000000 | 0000 |
| 26" | 1.62 | -0.17 to 0.17 | 0.007" | 0.5" | 0.59" | -0.06" to 0.06" | 0.75" | -0.08" to 0.08" | 0.131" | 1 | 301 Stainless Steel | 0000000 | 00000 |
| 28" | 6.88 | -0.69 to 0.69 | 0.014" | 0.75" | 1" | -0.04" to 0.04" | 1.28" | -0.03" to 0.03" | 0.191" | 1 | 301 Stainless Steel | 00000000 | 0000 |
| 28" | 9.19 | -0.92 to 0.92 | 0.014" | 1" | 1" | -0.05" to 0.05" | 1.23" | -0.03" to 0.03" | 0.191" | 1 | 301 Stainless Steel | 00000000 | 0000 |
| 30" | 2.63 | -0.27 to 0.27 | 0.008" | 0.5" | 0.59" | -0.06" to 0.06" | 0.82" | -0.09" to 0.09" | 0.196" | 1 | 301 Stainless Steel | 0000000 | 00000 |
| 30" | 3.29 | -0.33 to 0.33 | 0.008" | 0.625" | 0.61" | -0.07" to 0.07" | 0.83" | -0.09" to 0.09" | 0.196" | 1 | 301 Stainless Steel | 00000000 | 00000 |
| 32" | 14.76 | -1.5 to 1.50 | 0.018" | 1.25" | 1.3" | -0.06" to 0.06" | 1.65" | -0.03" to 0.03" | 0.191" | 1 | 301 Stainless Steel | 00000000 | 0000 |
| 32" | 17.71 | -1.7 to 1.70 | 0.018" | 1.5" | 1.3" | -0.08" to 0.08" | 1.65" | -0.03" to 0.03" | 0.256" | 2 | 301 Stainless Steel | 00000000 | 0000 |
| 33" | 4.12 | -0.42 to 0.42 | 0.01" | 0.625" | 0.73" | -0.08" to 0.08" | 0.99" | -0.1" to 0.10" | 0.196" | 1 | 301 Stainless Steel | 0000000 | 00000 |
| 33" | 4.95 | -0.5 to 0.50 | 0.01" | 0.75" | 0.71" | -0.08" to 0.08" | 0.97" | -0.1" to 0.10" | 0.196" | 1 | 301 Stainless Steel | 00000000 | 00000 |
| 34" | 3.5 | -0.35 to 0.35 | 0.01" | 0.68" | 0.85" | -0.09" to 0.09" | 1.12" | -0.12" to 0.12" | 0.187" | 1 | 301 Stainless Steel | 00000000 | 00000 |
| 36" | 28.71 | -2.87 to 2.87 | 0.025" | 1.75" | 1.8" | -0.13" to 0.13" | 2.15" | -0.03" to 0.03" | 0.256" | 2 | 301 Stainless Steel | 0000000 | 0000 |
| 36" | 32.81 | -3.28 to 3.28 | 0.025" | 2" | 1.8" | -0.13" to 0.13" | 2.1" | -0.03" to 0.03" | 0.256" | 2 | 301 Stainless Steel | 00000000 | 00000 |
| 38" | 5 | -0.5 to 0.50 | 0.012" | 0.81" | 1.02" | -0.11" to 0.11" | 1.4" | -0.14" to 0.14" | 0.187" | 1 | 301 Stainless Steel | 00000000 | 00000 |
| 39" | 5.94 | -0.6 to 0.60 | 0.012" | 0.75" | 0.88" | -0.09" to 0.09" | 1.19" | -0.12" to 0.12" | 0.196" | 1 | 301 Stainless Steel | 0000000 | 00000 |
| 39" | 7.92 | -0.8 to 0.80 | 0.012" | 1" | 0.88" | -0.09" to 0.09" | 1.2" | -0.12" to 0.12" | 0.196" | 1 | 301 Stainless Steel | 00000000 | 00000 |
| 40" | 10.6 | -1.06 to 1.06 | 0.016" | 1" | 1.2" | -0.12" to 0.12" | 1.52" | -0.16" to 0.16" | 0.196" | 1 | 301 Stainless Steel | 0000000 | 00000 |
| 43" | 7 | -0.7 to 0.70 | 0.014" | 1" | 1.19" | -0.12" to 0.12" | 1.5" | -0.15" to 0.15" | 0.187" | 1 | 301 Stainless Steel | 0000000 | 00000 |
| 50" | 16.5 | -1.65 to 1.65 | 0.02" | 1.25" | 1.47" | -0.15" to 0.15" | 1.89" | -0.19" to 0.19" | 0.196" | 1 | 301 Stainless Steel | 00000000 | 00000 |
| 52" | 24.8 | -2.48 to 2.48 | 0.025" | 1.5" | 1.77" | -0.18" to 0.18" | 2.23" | -0.23" to 0.23" | 0.265" | 2 | 301 Stainless Steel | 0000000 | 00000 |
| 52" | 33 | -0.33 to 0.33 | 0.025" | 2" | 1.78" | -0.18" to 0.18" | 2.22" | -0.22" to 0.22" | 0.265" | 2 | 301 Stainless Steel | 00000000 | 00000 |
| 60" | 40.9 | -4.09 to 4.09 | 0.031" | 2" | 2.5" | -0.25" to 0.25" | 3.03" | -0.31" to 0.31" | 0.265" | 2 | 301 Stainless Steel | 0000000 | 00000 |
25,000 Cycles of Useful Life | |||||||||||||
| 18" | 0.23 | -0.03 to 0.03 | 0.004" | 0.25" | 0.53" | -0.06" to 0.06" | 0.62" | -0.07" to 0.07" | 0.13" | 1 | 301 Stainless Steel | 00000000 | 0000 |
| 18" | 0.36 | -0.04 to 0.04 | 0.005" | 0.312" | 0.69" | -0.07" to 0.07" | 0.78" | -0.08" to 0.08" | 0.13" | 1 | 301 Stainless Steel | 00000000 | 0000 |
| 25" | 0.43 | -0.05 to 0.05 | 0.005" | 0.375" | 0.65" | -0.07" to 0.07" | 0.78" | -0.08" to 0.08" | 0.13" | 1 | 301 Stainless Steel | 00000000 | 0000 |
| 25" | 0.52 | -0.06 to 0.06 | 0.006" | 0.375" | 0.7" | -0.07" to 0.07" | 0.9" | -0.09" to 0.09" | 0.196" | 1 | 301 Stainless Steel | 00000000 | 0000 |
| 25" | 0.7 | -0.07 to 0.07 | 0.006" | 0.5" | 0.8" | -0.08" to 0.08" | 0.92" | -0.1" to 0.10" | 0.196" | 1 | 301 Stainless Steel | 0000000 | 0000 |
| 33" | 0.93 | -0.1 to 0.10 | 0.008" | 0.5" | 1.07" | -0.11" to 0.11" | 1.23" | -0.13" to 0.13" | 0.196" | 1 | 301 Stainless Steel | 0000000 | 0000 |
| 35" | 1.46 | -0.15 to 0.15 | 0.01" | 0.625" | 1.36" | -0.14" to 0.14" | 1.53" | -0.16" to 0.16" | 0.196" | 1 | 301 Stainless Steel | 0000000 | 00000 |
| 45" | 2.09 | -0.21 to 0.21 | 0.012" | 0.75" | 1.6" | -0.16" to 0.16" | 1.82" | -0.19" to 0.19" | 0.196" | 1 | 301 Stainless Steel | 0000000 | 00000 |
| 45" | 2.8 | -0.28 to 0.28 | 0.012" | 1" | 1.6" | -0.16" to 0.16" | 1.84" | -0.19" to 0.19" | 0.196" | 1 | 301 Stainless Steel | 00000000 | 00000 |
| 46" | 4.1 | -0.41 to 0.41 | 0.016" | 1" | 1.96" | -0.2" to 0.20" | 2.21" | -0.23" to 0.23" | 0.196" | 1 | 301 Stainless Steel | 0000000 | 00000 |
| 48" | 3.5 | -0.35 to 0.35 | 0.015" | 1" | 1.96" | -0.2" to 0.20" | 2.2" | -0.22" to 0.22" | 0.196" | 1 | 301 Stainless Steel | 00000000 | 00000 |
| 48" | 3.86 | -0.39 to 0.39 | 0.016" | 1.25" | 2.28" | -0.8" to 0.80" | 2.55" | -0.03" to 0.03" | 0.191" | 1 | 301 Stainless Steel | 00000000 | 00000 |
| 48" | 4.37 | -0.44 to 0.44 | 0.015" | 1.25" | 2.03" | -0.21" to 0.21" | 2.29" | -0.23" to 0.23" | 0.196" | 1 | 301 Stainless Steel | 00000000 | 00000 |
| 48" | 5.21 | -0.52 to 0.52 | 0.018" | 1.5" | 2.6" | -0.13" to 0.13" | 2.92" | -0.03" to 0.03" | 0.256" | 2 | 301 Stainless Steel | 00000000 | 00000 |
| 55" | 5.83 | -0.59 to 0.59 | 0.02" | 1.25" | 2.53" | -0.26" to 0.26" | 2.82" | -0.29" to 0.29" | 0.196" | 1 | 301 Stainless Steel | 0000000 | 00000 |
| 56" | 7.24 | -0.72 to 0.72 | 0.025" | 1.5" | 3.6" | -0.13" to 0.13" | 3.75" | -0.03" to 0.03" | 0.256" | 2 | 301 Stainless Steel | 00000000 | 00000 |
| 60" | 8.74 | -0.88 to 0.88 | 0.025" | 1.5" | 3.35" | -0.34" to 0.34" | 3.7" | -0.37" to 0.37" | 0.265" | 2 | 301 Stainless Steel | 0000000 | 00000 |
| 60" | 11.7 | -1.17 to 1.17 | 0.025" | 2" | 3.37" | -0.34" to 0.34" | 3.68" | -0.37" to 0.37" | 0.265" | 2 | 301 Stainless Steel | 00000000 | 00000 |
| 70" | 14.4 | -1.44 to 1.44 | 0.031" | 2" | 4.35" | -0.44" to 0.44" | 4.74" | -0.48" to 0.48" | 0.265" | 2 | 301 Stainless Steel | 0000000 | 00000 |
50,000 Cycles of Useful Life | |||||||||||||
| 30" | 0.44 | -0.07 to 0.07 | 0.006" | 0.5" | 1" | -0.1" to 0.10" | 1.22" | -0.13" to 0.13" | 0.196" | 1 | 301 Stainless Steel | 0000000 | 0000 |
| 36" | 0.58 | -0.09 to 0.09 | 0.008" | 0.5" | 1.49" | -0.15" to 0.15" | 1.61" | -0.17" to 0.17" | 0.196" | 1 | 301 Stainless Steel | 0000000 | 0000 |
| 40" | 0.91 | -0.14 to 0.14 | 0.01" | 0.625" | 1.86" | -0.19" to 0.19" | 2" | -0.2" to 0.20" | 0.196" | 1 | 301 Stainless Steel | 0000000 | 0000 |
| 50" | 1.31 | -0.2 to 0.20 | 0.012" | 0.75" | 2.24" | -0.23" to 0.23" | 2.4" | -0.24" to 0.24" | 0.196" | 1 | 301 Stainless Steel | 0000000 | 00000 |
| 52" | 2.32 | -0.35 to 0.35 | 0.016" | 1" | 2.98" | -0.3" to 0.30" | 3.15" | -0.32" to 0.32" | 0.196" | 1 | 301 Stainless Steel | 0000000 | 00000 |
| 62" | 3.63 | -0.54 to 0.54 | 0.02" | 1.25" | 3.73" | -0.38" to 0.38" | 3.94" | -0.4" to 0.40" | 0.196" | 1 | 301 Stainless Steel | 0000000 | 00000 |
| 66" | 5.44 | -0.82 to 0.82 | 0.025" | 1.5" | 4.66" | -0.47" to 0.47" | 4.88" | -0.49" to 0.49" | 0.265" | 2 | 301 Stainless Steel | 0000000 | 00000 |
| 78" | 8.99 | -1.35 to 1.35 | 0.031" | 2" | 5.77" | -0.58" to 0.58" | 6.04" | -0.61" to 0.61" | 0.265" | 2 | 301 Stainless Steel | 0000000 | 00000 |
Constant-Force Retractors
Right Hand Cable Exit
Left Hand 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.
For technical drawings and 3-D models, click on a part number.
Cable | Spring | Housing | Storage Drums | Mounting Holes | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Tension, lbs. | Travel, ft. | Dia. | Material | Torque, in.-lbs. | Material | Ht. | Wd. | Dp. | Material | No. of | Material | Mounting Fasteners Included | Dia. | No. of | Each | |
Right Hand Cable Exit | ||||||||||||||||
| 0.375 | 3 | 1/16" | Nylon Plastic | 0.10 | Stainless Steel | 1 1/2" | 1" | 1/2" | Stainless Steel | 1 | Nylon Plastic | __ | __ | __ | 0000000 | 0000000 |
| 1 | 6 | 1/16" | Stainless Steel | 0.78 | Stainless Steel | 3 3/4" | 2 1/2" | 1 1/4" | Zinc-Plated Steel | 1 | Acetal Plastic | No | 11/64" | 4 | 0000000 | 000000 |
| 2 | 6 | 1/16" | Stainless Steel | 1.56 | Stainless Steel | 3 3/4" | 2 1/2" | 1 1/4" | Zinc-Plated Steel | 1 | Acetal Plastic | No | 11/64" | 4 | 0000000 | 000000 |
| 3 | 6 | 1/16" | Stainless Steel | 2.33 | Stainless Steel | 3 3/4" | 2 1/2" | 1 1/4" | Zinc-Plated Steel | 2 | Acetal Plastic | No | 11/64" | 4 | 0000000 | 000000 |
| 3 | 22 | 3/64" | Steel | 3.63 | Stainless Steel | 6 1/4" | 3 1/4" | 2 1/4" | Zinc-Plated Steel | 1 | Acetal Plastic | No | 11/64" | 6 | 000000000 | 000000 |
| 4 | 6 | 1/16" | Stainless Steel | 3.12 | Stainless Steel | 3 3/4" | 2 1/2" | 1 1/4" | Zinc-Plated Steel | 2 | Acetal Plastic | No | 11/64" | 4 | 0000000 | 000000 |
| 5 | 6 | 1/16" | Stainless Steel | 3.90 | Stainless Steel | 3 3/4" | 2 1/2" | 1 1/4" | Zinc-Plated Steel | 2 | Acetal Plastic | No | 11/64" | 4 | 0000000 | 000000 |
| 5 | 19 | 3/64" | Steel | 5.62 | Stainless Steel | 6 1/4" | 3 1/4" | 2 1/4" | Zinc-Plated Steel | 1 | Acetal Plastic | No | 11/64" | 6 | 000000000 | 000000 |
| 7.5 | 3 | 3/64" | Steel | 6.65 | Stainless Steel | 5 1/4" | 2 3/4" | 2 1/4" | Zinc-Plated Steel | 1 | Acetal Plastic | No | 11/64" | 6 | 000000000 | 000000 |
| 7.5 | 17 | 3/64" | Steel | 8.06 | Stainless Steel | 6 1/4" | 3 1/4" | 2 1/4" | Zinc-Plated Steel | 1 | Acetal Plastic | No | 11/64" | 6 | 000000000 | 000000 |
| 10 | 3 | 3/64" | Steel | 7.95 | Stainless Steel | 5 1/4" | 2 3/4" | 2 1/4" | Zinc-Plated Steel | 1 | Acetal Plastic | No | 11/64" | 6 | 000000000 | 000000 |
| 10 | 15 | 3/64" | Steel | 10.60 | Stainless Steel | 6 1/4" | 3 1/4" | 2 1/4" | Zinc-Plated Steel | 1 | Acetal Plastic | No | 11/64" | 6 | 000000000 | 000000 |
| 13.5 | 13 | 3/64" | Steel | 13.90 | Stainless Steel | 6 1/4" | 3 1/4" | 2 1/4" | Zinc-Plated Steel | 1 | Acetal Plastic | No | 11/64" | 6 | 000000000 | 000000 |
| 15 | 2 | 3/64" | Steel | 11.90 | Stainless Steel | 5 1/4" | 2 3/4" | 2 1/4" | Zinc-Plated Steel | 1 | Acetal Plastic | No | 11/64" | 6 | 000000000 | 000000 |
| 15 | 13 | 3/64" | Steel | 15.50 | Stainless Steel | 6 1/4" | 3 1/4" | 2 1/4" | Zinc-Plated Steel | 1 | Acetal Plastic | No | 11/64" | 6 | 000000000 | 000000 |
Left Hand Cable Exit | ||||||||||||||||
| 3 | 22 | 3/64" | Steel | 3.63 | Stainless Steel | 6 1/4" | 3 1/4" | 2 1/4" | Zinc-Plated Steel | 1 | Acetal Plastic | No | 11/64" | 6 | 000000000 | 000000 |
| 5 | 19 | 3/64" | Steel | 5.62 | Stainless Steel | 6 1/4" | 3 1/4" | 2 1/4" | Zinc-Plated Steel | 1 | Acetal Plastic | No | 11/64" | 6 | 000000000 | 000000 |
| 7.5 | 17 | 3/64" | Steel | 8.06 | Stainless Steel | 6 1/4" | 3 1/4" | 2 1/4" | Zinc-Plated Steel | 1 | Acetal Plastic | No | 11/64" | 6 | 000000000 | 000000 |
| 10 | 3 | 3/64" | Steel | 7.95 | Stainless Steel | 5 1/4" | 2 3/4" | 2 1/4" | Zinc-Plated Steel | 1 | Acetal Plastic | No | 11/64" | 6 | 000000000 | 000000 |
| 10 | 15 | 3/64" | Steel | 10.60 | Stainless Steel | 6 1/4" | 3 1/4" | 2 1/4" | Zinc-Plated Steel | 1 | Acetal Plastic | No | 11/64" | 6 | 000000000 | 000000 |
| 13.5 | 13 | 3/64" | Steel | 13.90 | Stainless Steel | 6 1/4" | 3 1/4" | 2 1/4" | Zinc-Plated Steel | 1 | Acetal Plastic | No | 11/64" | 6 | 000000000 | 000000 |
| 15 | 2 | 3/64" | Steel | 11.90 | Stainless Steel | 5 1/4" | 2 3/4" | 2 1/4" | Zinc-Plated Steel | 1 | Acetal Plastic | No | 11/64" | 6 | 000000000 | 000000 |
| 15 | 13 | 3/64" | Steel | 15.50 | Stainless Steel | 6 1/4" | 3 1/4" | 2 1/4" | Zinc-Plated Steel | 1 | Acetal Plastic | No | 11/64" | 6 | 000000000 | 000000 |
Variable-Force 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 1/2 coils on the shaft at full extension to hold the spring in place.
For technical drawings and 3-D models, click on a part number.
| Load, lbs. | Extended Lg. | Thick. | Wd. | ID | OD | Mounting Hole Dia. | Number of Mounting Holes | Material | Each | |
5,000 Cycles of Useful Life | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| 0.5-1.00 | 22" | 0.0045" | 0.5" | 0.4" | 0.85" | 0.191" | 1 | 301 Stainless Steel | 000000 | 00000 |
| 0.55-1.20 | 28" | 0.0045" | 0.5" | 0.4" | 0.73" | 0.191" | 1 | 301 Stainless Steel | 000000 | 0000 |
| 0.75-1.50 | 22" | 0.005" | 0.5" | 0.5" | 0.8" | 0.191" | 1 | 301 Stainless Steel | 000000 | 0000 |
| 0.9-1.80 | 22" | 0.007" | 0.5" | 0.5" | 1.125" | 0.191" | 1 | 301 Stainless Steel | 000000 | 0000 |
| 1-2.20 | 22" | 0.007" | 0.5" | 0.55" | 1.03" | 0.191" | 1 | 301 Stainless Steel | 0000000 | 0000 |
| 1-2.20 | 28" | 0.007" | 0.5" | 0.55" | 0.95" | 0.191" | 1 | 301 Stainless Steel | 000000 | 0000 |
| 1.5-2.60 | 22" | 0.008" | 0.5" | 0.63" | 1.2" | 0.191" | 1 | 301 Stainless Steel | 0000000 | 0000 |
| 1.5-2.60 | 28" | 0.008" | 0.5" | 0.63" | 1.275" | 0.191" | 1 | 301 Stainless Steel | 000000 | 0000 |
| 1.75-3.30 | 22" | 0.01" | 0.5" | 0.98" | 1.38" | 0.191" | 1 | 301 Stainless Steel | 0000000 | 0000 |
| 1.75-3.30 | 28" | 0.01" | 0.5" | 0.98" | 1.46" | 0.191" | 1 | 301 Stainless Steel | 000000 | 0000 |
| 2-4.00 | 28" | 0.012" | 0.5" | 0.95" | 1.55" | 0.191" | 1 | 301 Stainless Steel | 000000 | 0000 |
7,500 Cycles of Useful Life | ||||||||||
| 0.55-1.00 | 28" | 0.0045" | 0.5" | 0.4" | 0.8" | 0.191" | 1 | 301 Stainless Steel | 000000 | 0000 |
Clip-On Constant-Force 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 1/2 extra coils on the shaft at full extension to hold the spring in place.
For technical drawings and 3-D models, click on a part number.
| Extended Lg. | Load, lbs. | Load Tolerance, lbs. | Thick. | Wd. | ID | ID Tolerance | OD | OD Tolerance | For Max. Mounting Surface Thick. | Material | Each | |
5,000 Cycles of Useful Life | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 24" | 1.5 | -0.15 to 0.15 | 0.006" | 0.5" | 0.53" | -0.05" to 0.05" | 0.68" | -0.031" to 0.03" | 0.138" | 301 Stainless Steel | 000000 | 00000 |
| 24" | 1.75 | -0.17 to 0.17 | 0.007" | 0.5" | 0.63" | -0.05" to 0.05" | 0.725" | -0.031" to 0.03" | 0.136" | 301 Stainless Steel | 000000 | 0000 |
13,000 Cycles of Useful Life | ||||||||||||
| 24" | 0.2 | -0.02 to 0.02 | 0.003" | 0.25" | 0.35" | -0.02" to 0.02" | 0.45" | -0.031" to 0.03" | 0.119" | 301 Stainless Steel | 000000 | 0000 |
| 24" | 0.4 | -0.04 to 0.04 | 0.004" | 0.25" | 0.4" | -0.04" to 0.04" | 0.55" | -0.031" to 0.03" | 0.117" | 301 Stainless Steel | 000000 | 0000 |
| 24" | 0.6 | -0.06 to 0.06 | 0.005" | 0.25" | 0.45" | -0.05" to 0.05" | 0.6" | -0.031" to 0.03" | 0.115" | 301 Stainless Steel | 000000 | 0000 |
| 24" | 0.8 | -0.08 to 0.08 | 0.005" | 0.312" | 0.5" | -0.05" to 0.05" | 0.675" | -0.031" to 0.03" | 0.115" | 301 Stainless Steel | 000000 | 0000 |
| 24" | 1 | -0.1 to 0.10 | 0.006" | 0.312" | 0.51" | -0.05" to 0.05" | 0.6" | -0.031" to 0.03" | 0.138" | 301 Stainless Steel | 000000 | 0000 |
| 24" | 1.25 | -0.12 to 0.12 | 0.006" | 0.375" | 0.55" | -0.05" to 0.05" | 0.675" | -0.031" to 0.03" | 0.138" | 301 Stainless Steel | 000000 | 0000 |
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.
For technical drawings and 3-D models, click on a part number.
| Max. Torque, in.-lbs. | For Shaft Dia. | OD | Wd. | Thick. | Number of Turns | Material | Each | |
| 0.41 | 1/4" | 1.5" | 0.5" | 0.004" | 44 | 301 Stainless Steel | 000000 | 000000 |
| 0.73 | 1/4" | 1" | 0.25" | 0.0075" | 11.5 | 301 Stainless Steel | 000000 | 00000 |
| 0.93 | 1/4" | 1.5" | 0.5" | 0.006" | 30 | 301 Stainless Steel | 000000 | 00000 |
| 1.65 | 1/4" | 1.5" | 0.5" | 0.008" | 22 | 301 Stainless Steel | 000000 | 00000 |
| 2.58 | 1/4" | 1.5" | 0.5" | 0.01" | 17 | 301 Stainless Steel | 000000 | 00000 |
| 4.2 | 5/8" | 2.8" | 0.25" | 0.018" | 14 | 301 Stainless Steel | 000000 | 00000 |
| 4.32 | 1/4" | 1.5" | 0.5" | 0.013" | 11.5 | 301 Stainless Steel | 000000 | 00000 |
| 4.5 | 1/4" | 1.8" | 0.375" | 0.016" | 12 | 301 Stainless Steel | 000000 | 00000 |
| 7 | 1/4" | 1.8" | 0.375" | 0.02" | 9 | 301 Stainless Steel | 000000 | 00000 |
| 8.3 | 5/8" | 3" | 0.5" | 0.018" | 16.5 | 301 Stainless Steel | 0000000 | 000000 |