Garage Door / Screen Door Springs Cylinder Style 74.25 C 7MM Wire Diameter
- - - -
Material | spring steel |
Wire diameter | 7mm |
Outside diameter | 91mm |
Total coils | 74.25 |
Active coils | 74.25 |
Direction | Right/left |
Hardness | HRC 38-40 |
Surface treatment | oiled |
Load type | torsion |
Style | cylinder |
Usage | screen door,construction |
- - - -
Garage door torsion springs are secured to a metal shaft above the garage door. depending on the system, the shaft may pass through the middle of the springs or spring, or the shaft may sometimes house the spring. If the shaft passes through the middle of the torsion spring, the spring may be mounted in the middle of the shaft or on the end of the shaft by the outside edge of the garage door.
Torsion springs have three characteristics that determine the lift and cycle life. These properties are the wire size, inside diameter and length. The lift, which is determined by the torque of the spring, tells how much door weight the spring can lift. The cycle life tells how many times the garage door should open and close before the spring breaks.
Garage door springs counterbalance the weight of the door to make it easy to open and close. They serve the same purpose of counter weights used to balance doors in centuries past and in many doors today.
applications of our torsion springs:
# # Residential sectional garage doors
# Commerial sectional overhead doors
# Industry shutter doors
# One-piece curtain doors
# mini-warehouse doors
# Self-storage doors
# Roll-up doors
How to order your garage door springs
For quotation,we need info of your torsion spring as follow:
# # Inside diameter
# Wire size
# Type of spring ends
# Gapped or ungapped
And before production,we will make drawing to let you confirm.