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Shaft coupler joins keyway shafts together to accommodate wider doors
Adjustable commercial bottom bracket
500mm spring pushers recommended for larger/heavier commercial/industrial sectional doors
Shaft Length: 170mmRoller diameter: 47mmRoller thickness: 12mmSealed bearing
Pack of nuts and bolts required for all residential
Torsion Spring - Alpine Blue Side:Left Hand Shaft coupler joins keyway shaftsBearing weight: 70kgMax door height: 3000mmSpring length: 1011mm Wire thickness: 6. 3mm
US$ 3000.00
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