spring sizing

Garage Door Torsion Spring Outlook for RFQ Accuracy Reference Standard: Relevant material and performance testing standards should be treated as a general validation framework, including mechanical testing principles from ASTM International and garage door system safety references from DASMA. Short Answer A Garage Door Torsion Spring should be specified by inside diameter, wire diameter, and surface finish, not by product name alone. The available catalog data supports inside diameters of 50mm, 65mm, 93mm / 3/4″, and 132mm / 5 1/4″, with wire diameter ranges from 5.0mm to 10.5mm, plus anti-rust oil, galvanized, and electrophoresis finish options. Garage Door Torsion Spring Outlook as a Stored-Torque Matching Component, Not a Simple Replacement … 続きを読む