I would like to change the oil in the gearbox of my RF-45.The manual that came with the machine says to use SAE-68. I e-mailed rong fu and they said to use SE-150 gear oil.I'm not sure what these gear oils are ,no one seems to refer to them by these numbers.I've seen numbers like ISO VG 150 in the msc catalog, is this the correct material? I bought the machine from Grizzly and they said to use 30 wt. non-detergent motor oil,don't know if I like that idea. Anyway ,what oils are you using in geared head lathes maybe these would be suitable?
Thanks for your help,