Measure a length of the spring then divide by the number of coils within that length.
How many turns for garage door torsion spring.
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On standard lift doors the formula is dh dc 1 or the door height in inches divided by the drum circumference in inches plus one.
Always convert torsion springs to a spring of equal or greater wire diameter.
The stretch of an extension spring is always the door height.
After winding the spring you may need to add or subtract a quarter turn or more.
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Number of turns needed to wind a torsion spring.
When you count 30 turns you should know that you have completed the remaining five turns.
Multiply the wire diameter by the total number of coils in the spring.
This completes a total of seven spring turns adequate for a standard garage door.
Multiply the number of turns by the wire diameter to find spring growth.
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