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How many turns for garage door torsion spring.
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The stretch of an extension spring is always the door height.
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When you count 30 turns you should know that you have completed the remaining five turns.
Measure a length of the spring then divide by the number of coils within that length.
After winding the spring you may need to add or subtract a quarter turn or more.
This completes a total of seven spring turns adequate for a standard garage door.
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.
In case of doubts on how many times you need to turn the spring contact a technician for guidance.
Multiply the wire diameter by the total number of coils in the spring.
Number of turns needed to wind a torsion spring.
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