Machining & Lineboring


JAK HD specialise in on-site lineboring and ID welding. Our skilled machinists can carry out repairs from 38mm to 1000mm on-site with the help of our mobile setup.

Our mine spec mobile unit has the capability to carry out the following repairs:

  • Boring
  • Taper boring
  • Facing
  • Taper facing drilling
  • ID welding
  • Liquid nitrogen bush and bearing installation and removal

From excavator shutdowns, tray change outs, bucket change outs, breakdowns and other line boring requirement be sure to get in touch with the team at JAK Heavy Diesel.


JAK HD offer a complete service for customers who are looking to have their machines and/or machinery components repaired, modified, or updated. We can repair and return your component to “as new” condition.

We currently carry out a wide range of boring and facing to hydraulic cylinders, buckets, platform trailers, heavy equipment buckets, grader steering axles, tray pivots and many other bores.