Crane Bottom Blocks
Bradley Lifting manufactures an extensive range of mill-duty Bottom Blocks. These units meet the latest industry specifications (CMAA, AIST Tech. Report No. 6, etc.) and include the following features:
- High strength, alloy steel in critical load zones
- Load block welded to side plates (for Powered Rotating Blocks)
- Forged, alloy steel hook
- Dedicated rolling element thrust bearing
- Hardened sheaves with rolling element bearings
- Hardened sheave pin with lubrication point(s).
Bradley offers Heavy-Duty replacement bottom blocks for standard cranes, and Mill-Duty Powered Rotating Blocks where controlled rotation of loads is needed.
Standard Bottom Blocks
AIST Tech. Report No. 6, etc.) Open die and closed die hook shapes are available with custom Heavy-Duty Latches. Through our parent company Xtek Inc., we also offer replacement sheaves with carburized rope landing areas to improve service life and decrease corrugation and wire rope wear.
Motorized Rotating Blocks
FEATURES AVAILABLEMany additional features can be incorporated into any of our Powered Rotating Crane Hooks:
- Reeved-in or bail pin crane connections
- Heavy duty safety latches (multiple options)
- Low headroom configurations
- Power supplies for below-the-hook lifting equipment
- Mechanical disengage from rotator drive (unpowered rotation)
- Weigh scale systems (digital display or direct interface)
Asked & Answered
Q: What is Needed to Operate these Powered Rotating Hooks?
A: Your crane should have a power supply line to the block, either Three Phase AC or DC is most common. Reversing motor starters are necessary to control operation, these may already exist on your crane or can be provided by Bradley. Most often these are mounted on the crane, out of harms way.
Q: What if I don’t have power available to the crane hook?
A: No Problem! Bradley can also provide battery operated blocks with wireless controls.
Q: Can I replace my standard block with a powered rotator?
A: Of course! Most of our powered rotating blocks are sold to replace standard bottom blocks in order to offer controlled positioning of loads. If your crane reeving is stable, and resists twisting, we can configure a Power Rotating Block to suit your needs.