External screw thread
External screw thread
(OP)
I need to make a male thread on the tip of an hydraulic rod. The diameter is 64mm and I need to machine M64x3,0. Lenght= 80mm
Is there a way of doing this job without disassembling the rod? Maybe with a hand die?
Is there a way of doing this job without disassembling the rod? Maybe with a hand die?





RE: External screw thread
Rather than ruin the part, take it apart and cut the threads properly on a lathe with a good, steady, aligned drive motor and steady rest.
RE: External screw thread
Otherwise it's a strip down, as you are certainly going to have to strip it down after it goes wrong!
RE: External screw thread
RE: External screw thread
RE: External screw thread
I like Compositepro`s idea. I will have to change the thread to M74 or M75 but it could work. The piece that is going to be screw to the rod is a "cilindrical head" made of nylon.
Those 6 holes that can be seen in the picture are now used to hold the Head. The idea is to discontinue the use of the holes and hold the head by a center thread. Obviously we will make a new nylon head without the holes and with a single big female thread
RE: External screw thread
Ted
RE: External screw thread
I envision threaded nylon loosening over time if the nylon acts as a snubber and gets bumped from time-to-time.
RE: External screw thread
RE: External screw thread
1. to thermically isolate the load (welding flux) from the heat of the rod coming from the oil and 2. to minimize the wear of the load cylinder by sacrifice the nylon material. We change the nylon head once a month
CWB1: The hydraulic cylinder can not be remove. It is a one piece cast. The rod can be remove from the end side of the cylinder but we dont have the time to stop the machine for more than a few hours
RE: External screw thread
Then drop a bolt in and your done.