Field Machining & Repair of the Bucket to Stick Bores on a Huge Loader Bucket

repair_bearing_housing_largeA client in an open pit gold mine commissioned Denver Machine Shop to repair the worn out bores on their giant bucket loader. This was the perfect scenario to utilize our portable hydraulic boring machine, the 3-½” x 16′ Climax Boring Bar. After a thorough inspection, we used carbon steel to perform a weld build-up on the worn down bores, and used the Boring Bar to machine the bores to accurate diameter and the bore faces to accurate width holding the specifications of the OEM. Two separate bores were finished, in line, measuring 10′ apart with a 10″ finished diameter and surface finish of 125 RMS. Tolerance of ±0.001″ was maintained over the span. Dimensional inspection, fitment, and functionality testing were performed to assure accuracy.

The required 660 bronze bushings were machined at our facility, with tolerances of ±0.0005″ held throughout. The bushings were transported to the site and installed into the machined bores. This was a 24/7 operation in order to ensure timely startup of the customer’s operation . Denver Machine Shop has the ability to repair, replace, or re-create equipment to client specifications, with rapid turnaround times. We adhere to the rigorous quality standards set by top industry organizations. For more information about this line boring project, or our other offered services, please see the table below or contact us directly.
Highlights of this Industrial Machine Repair Project

Product Description Field Repair of a bearing housing used in a large manufacturing operation.
Capabilities Applied/Processes
Welding Build Up 
Line Boring – 2 Separate Bores at Once
In-House Machining – Brass Bushings 
Installation – Brass Bushing Onsite
Equipment Used to Manufacture Part Hydraulic Portable Boring Machine

  • Up to Ø 30″ Bores
  • 16′ Boring Bar Length
Overall Part Dimensions Product Length: Bores are 10′ Apart 
Product Diameter: Ø 10″ Bore
Tightest Tolerances ± 0.001″ for Field Work 
± 0.0005″ on In-House Machining
Material Used 660 Bronze Bushings 
Carbon Steel Weld Build-Up on Bores
Material Finish 125 RMS
Additional Facts Bronze Bushings were machined in-House and transported to the customer site for installation into the machined bores
In process testing/inspection performed Dimensional Inspection, Fitment, Functionality Testing
Industry for Use Power Generation
Volume 2 bores in line
Project Timeline 5 Days – 24/7 Operation to ensure timely start-up of plant
Delivery Location Colorado
Standards Met Customer Specifications, 2D CAD Drawing
Product Name Line Boring


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