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 WIRE
SIZE:A spring’s wire
size can be determined by several different tools or techniques. Use
of a caliper, micrometer, or wire gauge are common ways to determine
a spring’s wire size. If none of these tools are available, simply
measure ten coils of wire to the nearest 1/16th of an inch, and refer
to the Spring Wire Chart. The spring must be tightly compressed, with
no gaps. It’s also a good idea to measure twenty coils as a double
check. |
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 INSIDE
DIAMETER:Measure the inside
diameter to the nearest 1/16th of an inch. In most cases, the cones
inserted in each end of the spring will have a manufacturers name
(OHD or Raynor, etc.) which will give a clue toward the proper identity.
The chart on the right shows common ID’s used by various manufacturers.
If no manufacturers name is evident, usually a part number on the
cone will indicate the inside diameter:
134 or 175 = 1 3/4" ID 258 or 263 = 2 5/8" ID 375 or 334 = 3 3/4" ID |
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LENGTH OF
SPRING:
Measure spring
length with the spring in its unwound state. In the case of a distorted
or broken spring, simply count the total number of coils and multiply
by the wire size.
120 coils x .250 wire = 30" 120 coils x .375
wire = 45" |
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RIGHT
OR LEFT HAND WOUND:
To ensure the correct
wind, please refer to the Winding Chart below. Please remember the
side of the door a spring is located on does not indicate the wind
of the spring. Most winding cones are color coded for hand identification.
Right hand wound springs should have red winding cones. Left hand
wound springs should have black winding cones. |
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