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  • How To Measure Torsion Springs

Shannysgetitnow Store will gladly answer any questions you may have on any of our products. We will answer any instalation questions via e mail on a daily basis. If you have a specific need & we do not have it listed, please drop us a line and we will give you a quote. We ship 6 days a week. Your order will ship the same or next day after you purchase, or your payment clears if paying by money order.

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Step 1 - Spring Length Measure the entire length of the spring. This measurement is to include all coils of the spring. If your spring is broken, measure both pieces of the spring in their entirety. If the spring is deformed to the point that an accurate length cannot be determined, count the total number of coils of the UNWOUND spring. Multiply wire diameter by total coils and this is the length.

Step 2 - Inside Diameter or I.D. is measured from the end of the spring. I.D. is measurement between the spring coils. This measurement can be taken with a tape measure or a caliper. On a residential door this measurement will typically be 1-3/4", 2", 2-1/4" or 2-5/8". Note: the spring I.D. may also be stamped on the spring fitting. Example: 175=1-3/4", 200=2", 225 = 2-1/4"or 263=2-5/8".

Step 3 - Wire Diameter This is the measurement of the thickness of one coil of the spring. There are several ways to measure wire diameter. Caliper, micrometer, tape measure and wire gauge. Tape Measure - When using a tape measure to measure wire size you count a specific number of coils and convert that measurement to a decimal. Use our chart below and count 10, 20, 30 or 40 coils. It is a good practice to count and measure at least two of these groups of coils. IE: count 20 coils, record this measurement then count 30 coils and compare both measurements to our wire chart Caliper or Micrometer - Place the caliper or micrometer on one coil of the spring. This measurement, expressed in a decimal, is the wire diameter.

Step 4 - Determine Right or Left Hand Wound Compare your spring to the images above and determine right or left hand wind. NOTE: This is not what side of the door the spring is on, it is what way the spring is WOUND. Look at your spring from the end of the spring, then look at the images above.

 

WIRE SIZE     10 COIL COUNT   20 COIL COUNT    30 COIL COUNT   40 COIL COUNT

.187             1-7/16                 3-3/4                   5-5/8                  7-1/2

.192             1-15/16               3-7/8                   5-3/4                  7-3/4

.207             2-1/16                 4-1/8                   6-1/4                  8-1/4

.218             2-3/16                 4-3/8                   6-1/2                  8-3/4

.225             2-1/4                   4-1/2                   6-3/4                  9

.234             2-5/16                 4-5/8                   7                          9-1/4

.243             2-7/16                 4-7/8                   7-1/4                  9-3/4

.250             2-1/2                   5                          7-1/2                   10

.262             2-5/8                   5-1/4                  8                           10-1/2

.273             2-3/4                   5-1/2                  8-1/4                    11

.283             2-13/16               5-5/8                  8-1/2                    11-1/4

.289             2-7/8                   5-3/4                  8-3/4                    11-1/2

.295             2-15/26               5-7/8                  8-3/4                    11-3/4