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Get Six Free Springs For Your Team!

Vulcan Spring has been a proud sponsor of FIRST Team 1218 since 2007. Vulcan is offering 6 free constant force springs to each team competing in the competition.

Mix and Match any 6 springs from our stock spring list below.  The offer also includes free shipping within the United States!  Orders generally ship within 2 business days once received.   

For orders needing faster shipment or orders shipping outside the USA, please call us at 215-721-1721. These orders will not ship until payment is receiving for shipping.

Please limit orders to one per team.

Carefully choose the 6 springs you would like and submit the request form on the right hand side of this page.

Vulcan Spring is a leading designer and manufacturer of constant force springs, also called constant tension springs. Conforce® is Vulcan Spring’s brand name for its constant force spring, a brand that is well known and highly respected for quality throughout the world.

Conforce constant force springs:

  • Offer high force output with very small space requirements
  • Provide long linear reach with minimal force buildup
  • Store power indefinitely when extended

Click here to view our technical considerations and mounting methods.

*Springs highlighted in orange are included in the packet.*

SERIES H SPRING LIFE 4000 CYCLES

Part Number Thickness (in) Width (in) Length (in) Load +-10% (lbs) I.D. +-10% (in) O.D. +-10% (in) End Holes
SH3C12 .003 .187 12 .37 .21 .30 1-.096
SH4C15 .004 .187 15 .49 .29 .40 1-.096
SH4D15 .004 .250 15 .66 .25 .40 1-.130
SH4E15 .004 .312 15 .83 .28 .40 1-.130
SH5E17 .005 .312 17 1.03 .37 .50 1-.130
SH6F24 .006 .375 24 1.48 .45 .62 1-.196
SH6G25 .006 .500 25 1.97 .45 .65 1-.196
SH8G30 .008 .500 30 2.63 .59 .82 1-.196
SH8J30 .008 .625 30 3.29 .61 .83 1-.196
SH8K24 .009 .750 24 4.00 .62 .82 1-.196
SH10J33 .010 .625 33 4.12 .73 .99 1-.196
SH10K33 .010 .750 33 4.95 .71 .97 1-.196
SH12K39 .012 .750 39 5.94 .88 1.19 1-.196
SH12P39 .012 1.00 39 7.92 .88 1.20 1-.196
SH16P40 .016 1.00 40 10.60 1.20 1.52 1-.196
SH20R50 .020 1.25 50 16.50 1.47 1.89 1-.196
SH25S52 .025 1.50 52 24.80 1.77 2.23 2-.265
SH25U52 .025 2.00 52 33.00 1.78 2.22 2-.265
SH31U60 .031 2.00 60 40.90 2.50 3.03 2-.265

 

SERIES L SPRING LIFE 25000 CYCLES

Part Number Thickness (in) Width (in) Length (in) Load +-10% (lbs) I.D. +-10% (in) O.D. +-10% (in) End Holes
SL4D18 .004 .250 18 .23 .53 .62 1-.130
SL5E18 .005 .312 18 .36 .69 .78 1-.130
SL5F25 .005 .375 25 .43 .65 .78 1-.130
SL6F25 .006 .375 25 .52 .7 .90 1-.196
SL6G25 .006 .500 25 .70 .80 .92 1-.196
SL8G33 .008 .500 33 .93 1.07 1.23 1-.196
SL10J35 .010 .625 35 1.46 1.36 1.53 1-.196
SL12K45 .012 .750 45 2.09 1.60 1.82 1-.196
SL12P45 .012 1.00 45 2.80 1.60 1.84 1-.196
SL15P48 .015 1.00 48 3.50 1.96 2.20 1-.196
SL15R48 .015 1.25 48 4.37 2.03 2.29 1-.196
SL16P46 .016 1.00 46 4.10 1.96 2.21 1-.196
SL20R55 .020 1.25 55 5.83 2.53 2.82 1-.196
SL25S60 .025 1.50 60 8.4 3.35 3.70 2-.265
SL25U60 .025 2.00 60 11.70 3.37 3.68 2-.265
SL31U70 .031 2.00 70 14.40 4.35 4.74 2-.265

Request Form

Spring Request Form