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borg
5/1/2022 2:22pm
5/1/2022 2:22pm
Edited Date/Time
5/3/2022 2:13pm
Some shoptalk here:
I have always heard that using the compound at 30 d, reduces chipload. I don't think it does. If you make the thread with the same number of passes as a straight plunge, the chipload is the same and it's mostly on one cutting edge. It has to be the same because in the end you are removing the exact same amount of material. To me, the only reason to use the compound is because you don't have to remember any dial positions except 1. It's more foolproof but you don't have to set the compound at 30 degrees. You can set it to anything between 0 and 30.
Does this make sense?
I have always heard that using the compound at 30 d, reduces chipload. I don't think it does. If you make the thread with the same number of passes as a straight plunge, the chipload is the same and it's mostly on one cutting edge. It has to be the same because in the end you are removing the exact same amount of material. To me, the only reason to use the compound is because you don't have to remember any dial positions except 1. It's more foolproof but you don't have to set the compound at 30 degrees. You can set it to anything between 0 and 30.
Does this make sense?
This is an engine lathe forming standard UNC, UNF and metric threads with a single point. The commonly recommended method is to set the compound at or just below 30 degrees and use that to plunge the cutting tool which loads the left face of the cutter with almost all of the chipload.
Typical NPT threads are at a taper of 3/4"/ft. I understand that API uses a different taper.
The Shop
and in. We did not have any carbide tools in the shop, all hss tooling in our shop. I don't think the chips would come off the tool as well going straight in. After I started designing the machines I was more valuable doing that then doing the machining. I'm actually starting to learn/relearn some new things. Going to start playing with and older Mori Seiki soon.
Also, finally getting good parts of the router.
TM
This thing has some pretty nice linear bearings and large ball screws. Also, I probably would have used a handheld router. This has a spindle that is almost noiseless. Of course the big chip collector vacuum makes a lot of noise.
4ft X 4ft x 5in. I also probably would have made it smaller. The bigger size and better build makes it more versatile.
This is the one we bought. Keep in mind the price doubled since we purchased ours. Pretty sure this will handle
not so demanding aluminum work also.
https://www.elephant-cnc.com/pro/1212-desktop-advertising-cnc-machine/
TM
I will check out the link.
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