Line Boring Weldpro Fabrications Victoria Australia

Line Boring is a service offered by Weldpro Fabrications for earth moving and industrial machinery. We also provide steel fabrication services.

We can repair your worn and damaged pin or bush holes which can be damaged due to a lack of grease, worn, out-of-round or damaged bores due to fatigue and excessive use.

Our line boring equipment is powered by a state of the art hydraulic drive system and can repair holes from 40mm to 350mm in size.

This service can be performed at our workshop in Ravenhall Vic or onsite.

The machines we service can be found on construction sites, quarries, mining, civil projects, waste and recycle industries etc.

Some of the items we can line bore repair include:

  • Excavator sticks
  • Quick hitches
  • Buckets
  • Centre pins on grapples and grabs
  • Hydraulic cylinder eyes
  • Centre hitches on wheel loaders
  • Load frames
  • Dump truck body’s
  • Graders
  • Waste material handlers
  • Dozer blades
  • Worn holes on push arms, equalizer bars, and all other steel pins or bushes that are worn.

Bore welding process

We carry a robotic welder for the welding of all holes ready to be machined to size. Each damaged hole that needs repair is machined by taking a 1-2mm cut to clean the hole from grease and oil or to remove broken fragments from the bushes or pins. Once this is completed a robotic welder is then used to weld the hole with a build-up of around 3mm to 5mm and depending on how much damage the bore has suffered it can be built up with welding several times over. The faces can also be welded if they are worn by hand by pad welding ready for machining.

Line Boring  

Machining holes

After welding the boring bar and hydraulic drive motor is fitted and the machining begins, once the bush or pin is measured and the size for the hole is determined the new hole is machined to spec. The bush is then pressed in using a hydraulic porta power and the reassembly of the machine can take place.

Machines we can line bore

  • Komatsu
  • Caterpillar
  • Liebherr
  • Volvo
  • Doosan
  • Kobelco
  • Kubota
  • Hitachi
  • Case
  • JCB

Tools we carry

Mobile line boring hydraulic unit, bore welder, flange facer, diesel welder with 240v and 3 phase power, single phase welder, dial indicators, internal micrometers, external micrometers, internal callipers, external callipers, grinders, and all measuring equipment.