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Threading practice
- Thread starter DavidR8
- Start date
That's really nice work. I have a CT089 but never even removed all the gears from the box they came in as I never thread. My model didn't come with a thread dial. I did buy one from Busy Bee that is suppose to match up with the CT089 but I've never mounted it. I mostly use my lathe for facing and turning bushings. But I should learn.
Good job.
Good job.
Brent H
Ultra Member
@David_R8 - I like to use a parting tool and run it in to the theoretical minor diameter of the thread I am cutting. This serves 2 purposes - 1. gives me about 1/8" of run out space for the threading tool and 2: gives me a reference for the depth of cut. Typically do a trial fit of the nut about 10 thou or so before finished depth to check the fit.
At this point I will also take a file and remove any burs on the the thread tops such that my last couple passes will tend to clean off the remaining edge of the threads and ensures my test fit is for the treads and not the burs sticking up.
Your threads are looking great by the way - nice and clean - no chatter marks
At this point I will also take a file and remove any burs on the the thread tops such that my last couple passes will tend to clean off the remaining edge of the threads and ensures my test fit is for the treads and not the burs sticking up.
Your threads are looking great by the way - nice and clean - no chatter marks
No, that's a chunk of 1018
What rpm are you turning at? And are you using HSS or insert?
Sent from my iPhone using Tapatalk
Sent from my iPhone using Tapatalk
Scarily, that was 244 rpm using an ER16 insert.
What Brent said on parting tool. I either use my regular parting tools or you can even grind a round-over nose profile to give it a smoother transition vs. the 90-deg step (although a step can be chamfered so its whatever you prefer). Although threading tools can be plunged in like you are doing, they are really more intended for shallower depth of cut per pass. Chances are you spent some money or time on the profile, so its maybe good to preserve it for actual threading as much as possible.
Ya, threading towards the chuck is always exciting
I can't imagine doing it at recommended turning RPM
I do have a set of collet blocks, haven't used them yet but I see a future in custom bolts with wacky head sizes for which no wrenches exist!Nice, if you make a nut for it you can use the term "custom" and sell it for a small fortune
Have got the six sided holder for milling nuts and bolt heads?, it's on my to buy list.