Genuine LiftMaster CHAINTENS125DC 1.25 in. chain tensioner spreader bar for the Maxum industrial DC operators.
Fitment: LiftMaster Maxum JDC, RJDC, JHDC and TDC industrial DC operators.
For 1.25 in. output shafts. The 1 in. version is CHAINTENSDC.
Ordering the right part depends on the full model number, which is printed on the operator label. Call GateHouse Supplies if you are not sure — we service these units every day.