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Spring makers posses a vast amount of knowledge. In this section they can share that knowledge with their fellow spring makers around the world. We encourage all great spring makers to post a few trade secrets in a specific category. Each spring maker that posts a secret of the trade will get full credit for their submission and their trade secret will be posted for everyone to see. Enjoy!
"Spring makers unite and collaborate with each other for the better good of the Spring world !!"
To determine the number of inches in springs
- Compression springs
- Torsion spring (body only)
- Extension spring (body only)
- Determine Mean Diameter (D) - add one wire size (d) to inside diameter or subtract one wire size from outer diameter.
- Multiply mean diameter (D) by 3.14 (PI). This figure equals the number of inches in one coil.
- Multiply this figure by (N). "N" = the total number of coils in the spring (on extension spring, add two coils).
- This figure equals the number of inches in the spring.
To Determine the Total Feet in the Job
- Multiply #4 by the number of parts in the job (the quantity).
- Divide #5 by 12 to get the total feet in the job and record this number.
To Determine the total Pounds Required for a Job
- Wire size x wire size
- #7 multiplied by 9.42
- #8 multiplied by the density (MW / HD =.290, SS=.291, BER.CORP = .302)
- #9 multiplied by #6 = Total pounds for the job
To Determine the Number of Feet Per Thousand (M)
- Multiply the figure from #4 by 1000.
- Divide this figure by 12.