4.45 is a constant (derived from the mechanical advantage of the drums) number of springs is typically 1 or 2. number of turns is usually between 7.5 and 8.5 for a standard 7 foot door. example: let's say you have a 200 pound door with one spring, and you want 8 turns: ippt = (200 x 4.45) (1 x 8) = 111.25. There are a number of mistakes that can happen if you're not sure what type of torsion springs your garage door needs. this video will cover 3 common mistak.
Hold a level at the bottom of the track junction (where the vertical track and curved portion of the track connect). next take a tape measure and measure the distance from the center of the horizontal track to the top of the level. the measurement you get is what the radius of the door is. 5. door height. Measure the inside diameter. for most garage doors, the inside diameter will be indicated between the springs above the door. the inside diameter is measured to the nearest ⅙ inch. however, if you do not have the diameter of that spring, then you can measure it yourself. to do this, you should remove the spring. Our calculator takes the guesswork out of spring sizing. just input your measurements, and it’ll crunch the numbers for you. the track radius affects how the door moves. to measure it: hold a level at the bottom of the track curve. measure from the track’s center to the level’s top. While the garage door industry’s standard cycle life is rated 10,000 cycles, springs less than 10,000 cycles are rated overstressed and are not always recommended for use. however, if you prefer 10,000 spring cycles, your new torsion spring should have a larger wire size. with a larger wire, the longer it will take for the spring to break.
Our calculator takes the guesswork out of spring sizing. just input your measurements, and it’ll crunch the numbers for you. the track radius affects how the door moves. to measure it: hold a level at the bottom of the track curve. measure from the track’s center to the level’s top. While the garage door industry’s standard cycle life is rated 10,000 cycles, springs less than 10,000 cycles are rated overstressed and are not always recommended for use. however, if you prefer 10,000 spring cycles, your new torsion spring should have a larger wire size. with a larger wire, the longer it will take for the spring to break. In order to order new garage door torsion springs, you will need to measure (as accurately as possible) your current spring (s) and find the: 1. wire size 2. inside diameter (90% of doors have a 2.0" inside diameter) 3. spring length (how long each spring is) 4. spring orientation only worry about this if you have a 1 s. This step ensures that the door won’t move during the measurement process. locate the spring you wish to measure. depending on the type and position of the spring, it may be visible when the door is closed or open. to measure the length of the spring, use your tape measure to measure the distance between the coils.
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