G'day mate ,, only just found you. great vid and look forward to more, cheers
@docsofftopic8130Ай бұрын
Welcome to the shop mate
@y-notforge89132 ай бұрын
..this like most machining operations is out of my wheelhouse, but like Spock said- Fascinating...
@docsofftopic81302 ай бұрын
I know, sometimes you just have to throw caution to the wind and have a go
@packapunchburger2 ай бұрын
Well that's a new workout to try
@mr.ranyhomemade24666 күн бұрын
Thanks for your shared, I wondering car I do the diameter gear different or must be the same diameter? Thanks
@docsofftopic81305 күн бұрын
It depends on the tooth pitch, larger tooth pitch (smaller teeth) has a smaller wheel size. There are online calculators to help you work out the size you need for a given tooth count.
@mr.ranyhomemade24665 күн бұрын
@@docsofftopic8130 thanks, definitely tooth pitch just different in diameter only. I have bought some scrape gears here so expensive. Thank for recommended.
@KSMechanicalEngineering2 ай бұрын
Nice
@docsofftopic81302 ай бұрын
And the gear has worked a treat for the current job on the bench, TR8x2 done and dusted
@mhc67772 ай бұрын
Nice work Doc, looks like you are getting on well with your new mill. You mentioned cutting the teeth with the mill in reverse (counter clockwise) because of manufacturer's recommendations - is there any reason it wouldn't work cutting clockwise and feeding left to right? Just asking for people whose mill doesn't have reverse.
@docsofftopic81302 ай бұрын
I suspect it’s because the tooth profile might not be centred on the cutter blank they use, but if they are all made the same way then it should be a given distance from one side cutter to cutter. But so long as you center the tooth accurately there shouldn’t be a reason it wouldn’t work. Provided the cutter is oriented correctly, turning it upside down would reverse the required rotation to cut.
@jasonbell5905Ай бұрын
You said single point?
@docsofftopic8130Ай бұрын
Yes, it’s a work around for the steel used (work hardened suckerrod), then for the metric threads at least the get trued up with a die once cut to approx 75% of full depth.
@greggarnham84972 ай бұрын
14 TPI is nowhere near 1.75mm pitch, its actually about 1.81mm . . . . I found that even a horribly overcut 14TPI would only engage an M40 x 1.75 collar for 2 or 3 turns before it bound up. Thats why I've just had to make some new change gears for my lathe (a 28T, 35T and 37T. Any one of them would have done, but I cut all 3 because I'd already spent the time doing the maths, and because it was fun !) Now I have 3 options to achieve 1.75 mm.
@docsofftopic81302 ай бұрын
At 12, so Lo g as you chase it with a die post cutting (don’t cut to full depth) you get three or so slightly over cut threads at the inboard end over 20mm you only need 6 turns to reach the max yield for a give thread. So well more than I needed for this.
@greggarnham84972 ай бұрын
@docsofftopic8130 Yeah, that would have worked, if I could get an M40 x 1.75 die ! I was stuck with single pointing it . . . . As I say, good excuse to make some gears !
@ita-12452 ай бұрын
What misting fluid do you use?
@docsofftopic81302 ай бұрын
Semi-synthetic water soluble, local brand is XDP-139, about 10% solution.
@lohikarhu7342 ай бұрын
There's a smaller tooth ratio thats really, really close...0.06% 33/13 = 2.5385 2.5385 / 2.54 = 0.9994
@docsofftopic81302 ай бұрын
I know but I’ll be doing some relatively long sections of thread so need them as accurate as possible as some are feed screws for lathes I’m restoring/rebuilding
@lohikarhu734Ай бұрын
Gotcha! Clear!
@mfs5493Ай бұрын
POOR TO NON-EXISTENT EDITING, UNPREPARED, OFF.THE-CUFF COMMENTARY.
@docsofftopic8130Ай бұрын
And? It’s my channel don’t like it don’t stick around
@randombiopod7384Ай бұрын
I'm staying, really appreciate your comments and production, real and informative, thankyou