You have to find out the length of this unwound Spring, however, you do not have to unwind the Spring to Measure the Length.
Measure in the first coil on one end of this spring into the last coil on the opposite end of the spring. Don’t include the cones themselves on your measurement, but include the coils which are on the cone. Besides, If you want to keep your garage door safely maintain then you shall know garage door repair Albuquerque NM.
Caution: If the torsion spring is still wound, then don’t touch with the setscrews on the winding cone. Don’t touch the bolts which secure the stationary cone into the spring anchor mount. The coils should be touching, and also there should not be a difference. As with all the unwound spring above, measure the distance in the first coil one end into the last coil on the other.
Torsion Springs develop a coil in length with every turn of tension applied to them. The gain from the spring length is replaced with small gaps between the coils once you open your Garage Door because the set screws don’t proceed on the shaft so that you cannot open your door to measure the Spring Length. Measuring a wound spring requires determining the number of turns to the spring.
Caution: Keep your fingers from this spring and in the winding cones – the spring can suddenly unwind at any moment.
If there are paint, chalk or crayon marks wrap around the Spring, this is easy. The mark initially traveled across the length of the spring and didn’t wrap around. The torsion spring has just one turn for every time that the paint stripe comes back into the front of the Spring.
Also, if you’ve got a residential garage using standard 4″ cable drums, simply subtract from your entire spring length the number of coils added while the Spring was initially wound. On seven foot high doors, this could be eight coils and also on eight feet doors it might be nine coils.
As an instance, on a seven-foot-high garage door, a 34″ spring comprised in .250 cable would increase eight coils if it is wound and stretched. The spring will expand 7.5 coils, or 7.5 X .250 to your coil size, or 1 7/8″. The 34″ spring will measure out in thirty-six inches. Deducting eight coils by the entire length will offer an exact length of thirty-four inches.
There is another way to find out the number of turns onto the springs on bigger standard lift industrial doors or on residential doors using non-standard drums. Measure the circumference of the cable, and also measure the elevation of the Garage Door in inches. Divide the height of the Garage Door from the cable circumference, then add one. This is how many turns which are in your spring. A number of these have drums using 17″ circumferences. Dividing 168″ by 17″ will provide you 9.88. Add one to this and you also get 10.88 turns and using just a little stretch, a total of 12 coils. Deducting 12 coils from the entire length will provide you an exact length of this spring if it is unwound.
If you’re measuring springs onto a bigger commercial or industrial doorway and there is not a paint stripe, and if you’ve got a vertical-lift or high-lift Garage Door, then it will probably be easier for you to unwind the springs compared to figure out the length of the Spring.
Regardless of how you decide the number of turns onto a wound Spring count off one coil for every twist and measure the rest length of the Spring to ascertain the unwound length of this Spring.