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Drum Size and Cable Length Calculator
Estimate the required length for your garage door's lifting cables and get a general recommendation for drum sizing based on door height and lift type.
Understanding Drums and Cables
The drums and cables are critical components that work together with the springs to lift and lower your garage door smoothly and safely. The drum is the grooved wheel on the torsion spring shaft that the cable winds onto. The correct drum and cable combination is essential for a balanced door that doesn't put undue strain on the opener.