Description
Abell-Howe J904L Series Features and Benefits
- 1/4 ton – 1/2 ton.
- Boom lengths from 6–16 ft.
- Under Boom Height from 8 to 14 ft.
Specifications
- 360-degree rotation on a tapered roller bearing providing full-capacity vertical and radial thrust loading.
- Lower section of the head assembly revolves around the pillar on a pair of cam rollers.
- Fully enclosed cam rollers to avoid pinch points.
- Base plate is reinforced with heavy steel gussets for continuous alignment and rigidity.
- Top head assembly can be shimmed for boom leveling.
- End-stops at both ends of the boom for safe trolley travel.
Component Material
- Mast — Fabricated from heavy wall structural steel pipe with wall thickness sized to minimize deflection.
- Boom – Wide flange beam section which provides high load-bearing capacity and improved structural integrity to effectively resist bending stresses.
- Head Section — Heavy-duty pipe section with greased top bearing.
Concrete Floor Notes
- Concrete floor must be at least 6” thick and contain wire mesh reinforcement.
- Minimum soil pressure of 2,500 psf.
- Minimum concrete compressive strength of 3,000 psi.
- Jib crane must be centered on a square foot area that is free of cracks, seams, control joints, and walls.
Optional Accessories
- Top entry collector or air swivel (for 360-degree continuous rotation).
- Rotation stops.
- Anchor bolts with template – paper or steel.
- Epoxy paint finish.
- Tagline wire assemblies for hoist power cable.