Making a 100T Heavy Duty Mining Jack Cylinder Rod | Machining & Threading
This video is a job we did to make a new cylinder rod for a 100 Tonne Edmo heavy duty hydraulic jack that is used to lift mining trucks and excavators. The rod has scratches and dents in the chrome and the top of the cylinder rod is damaged. This shows the step by step process to make the new cylinder rod including machining and thread cutting. To start, we remove the piston off the rod and that will be used to test the thread on the new rod. We machine up the new cylinder rod using a 6” inch diameter induction hardened chrome bar. We need to machine both ends of the cylinder rod, the first end we drill and bore the hole to suit the load cap. Then we machine the other end of the rod by machining through the induction hardened chrome layer before turning down the OD and cutting the 8tpi external thread for the piston. We finish the job by installing the piston before drilling and tapping a hole for a grub screw to lock the piston on the cylinder rod.
In this video we are using:
- Hafco TM-26120G Centre Lathe
- MetalMaster HPM-150T Hydraulic Press
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Our channel is all about showing you real life machining work from our workshop on the Gold Coast Australia. We specialize in manual machining, hydraulic repairs and heavy fabrication for the earth moving, mining and civil construction industries. So if you're a machinist that wants to see some big gear in action be sure to subscribe to our channel right now. We upload new videos every week that show lathe machining, milling, welding and all the good stuff that comes from a machining workshop. If that sounds like something that you would enjoy seeing, then make sure to join us by subscribing!