TL;DR
A cable drum is the grooved cast-aluminum spool mounted at each end of a garage door's torsion shaft that winds the lifting cable as the springs turn the shaft, converting stored spring torque into the straight pull that raises the door. The machined grooves keep the cable wrapping evenly so both sides of the door lift in sync; standard drums serve doors up to about 8 feet of lift, with high-lift and vertical-lift profiles for taller tracks.
What it means
A cable drum is the grooved cast-aluminum spool mounted at each end of a garage door's torsion shaft that winds the lifting cable as the springs turn the shaft, converting stored spring torque into the straight pull that raises the door. The machined grooves keep the cable wrapping evenly so both sides of the door lift in sync; standard drums serve doors up to about 8 feet of lift, with high-lift and vertical-lift profiles for taller tracks. A cable that jumps the grooves or a drum with a cracked flange leaves the door crooked and jammed in its tracks. Like all torsion-system parts, drums are replaced with the springs unwound, and only by someone trained to do it.
Where it sits in the glossary
Cable drum is part of the Trade jargon group inside the ProFix Directory glossary. Browse every term in this category from the glossary index.
Why Ohio homeowners should know it
This is a term Ohio homeowners encounter when reading contractor quotes, hiring paperwork, or inspection reports. Understanding it well enough to ask one good follow-up question is usually all the protection a homeowner needs.
ProFix Directory keeps definitions short on the index page and saves the longer context — Ohio-specific rules, where the term comes from, and which ProFix tools touch it — for these per-term pages so the term is easy to cite and easy to share.
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