Caterpillar improves fill speed and weight of dragline buckets

Cat® has released a new double clip back bucket for draglines that, it says, features an innovative design that increases fill speed and reduces bucket weight for faster cycle times and greater payload.

The patented design also eliminates the highmaintenance spreader bar from the rigging system, it said.

The wide mouth, aggressive lip angle, and low front height reduce drag power required to fill the bucket, according to the company, while the design minimises the required fill distance for improved productivity and reduced bucket wear.

Cat said: “The unique shape of the rear wall enables the bucket to fill without upper rear corner voids, and it increases material density in the bucket for optimum payloads on every pass. It also clearly shows the operator when the bucket is full and should exit the cut.”

Eliminating the hoist rigging spreader bar has additional benefits, such as reduced wear and tear on the top rails and trunnions, Cat said. Meanwhile, fewer system components result in less inventory management and reduced maintenance cost. The rigging system design also gives the operator better control of the bucket and reduces the opportunity for an inexperienced operator to damage it, the company said.

“The unique trunnion design and location on the clipped portion of the bucket protects the lower hoist link from wear and provides quick dumping of the payload,” Cat said, adding that the design includes a cast-in deflector to protect and increase the life of the trunnion.

“The new Cat bucket is available for a wide range of dragline sizes and applications, no matter what the brand of machine,” Cat said. “Using data-driven analysis, Caterpillar designs each bucket for the specific dragline and application.”

The design process uses all significant parameters, including ground density, wear package, rigging package and bucket weight to optimise performance within the dragline’s rated suspended load, Cat explained. Reduced dead weight of the double clip back bucket, as compared with conventional designs, ranges from 2-10% depending on the application, it added.

Cat dragline buckets also include wear packages based on the mine’s material abrasiveness and digging conditions. The Cat dragline bucket lip nose casting supports the Cat CapSureadapter and tooth system. The system delivers long wear life and hammerless installation of teeth for enhanced safety and faster removal and replacement.