Making a BIG Nut for Hydraulic Cylinder | Machining & Milling

We’re turning a chunk of solid 4140 steel into a big nut for the EX1200 bucket cylinder rod. We are making the new nut to replace the one that was seized and gouged off the cylinder rod! In this video we show the step by step process of making the new cylinder nut. We are starting with a solid piece of 4140 steel bar. First we drill and bore out the centre of the material in the lathe. Then we cut the internal threads before finish turning the outer diameter. Next we use the super indexer in the milling machine for face cutting the nut into a hexagon before drilling and tapping a hole for the grub screw. We finish the job by machining the new threads onto the EX1200 cylinder rod to suit the big nut. In this video we are using: - Hafco TM-26120G Centre Lathe - Hafco BM-63VE Milling machine Missed the first video where we gouge the seized nut off to save the $20K cylinder rod? Watch it here: Join our channel: We upload new videos ever