Record Breaking Drill Sub (Machined With MASSIVE Shop Made Tools!)

In this week's video we'll be machining the largest drilling crossover sub we've machined in 60 years!

A "saver sub" for the Big Rig,
the part starts as a 900lb (400kg) billet of solid 4140, and ends up a giant thread protector.

This saver subs sits directly below the drive head and will he screwed into the giant drill rods that drive our 3.0m (10ft) Megadrill an insane 250m (800ft) into the earth!

About HAL Heavy Duty:
We're a real life machine shop for a 60 year old drilling company located in Central Queensland, Australia. Our job is to keep rigs running in the field, fixing all the stuff drillers break, and creating all the custom gear they need to get the job done!

We run three CNC's, manual repair lathes, a few mills and a big green Megabore Lathe we call "THE HULK"... and are constantly having to make weird and wonderful tools for odd (usually oversize) jobs.

We're a little shop that takes on big projects, and the latest is our MEGADRILL project where we're manufacturing a 3.0m (10 foot!) drill bit that'll weigh upward of 20 tonnes and we're getting ready to send it 250m (800+ feet) deep.

Here's the latest on the project.
The Megadrill Project    • The Megadrill Project (A 3m Drill bit that...  
The Drive Sub    • Big Rig Drive Sub | Megabore Lathe | CNC M...  
Mega Drill Rods
   • Mega Drill Rods Getting Torqued Up To 65,0...  

We release one video a week (usually on Friday/Saturday) to give you all a window into our heavy duty world.

#australianmachinist #machinistlife #machineshoplife #cnclife #heavydutyequipment #australiandrilling