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Re: Modifying Standard Gear Box
Posted: Fri Apr 27, 2018 1:11 pm
by walter
The original gear axles are 3.5mm dia. I kept that size on all the gears.
To be able to use the flanged ball bearings both enda of the axles need to be turned down to 3mm dia
Re: Modifying Standard Gear Box
Posted: Fri Apr 27, 2018 1:13 pm
by walter
Finished
Re: Modifying Standard Gear Box
Posted: Fri Apr 27, 2018 1:15 pm
by walter
Another one
Re: Modifying Standard Gear Box
Posted: Fri Apr 27, 2018 1:17 pm
by walter
One more
Re: Modifying Standard Gear Box
Posted: Fri Apr 27, 2018 2:13 pm
by wibblywobbly
The difference between a mere modeller with a blunt file, and a qualified engineer with the right tools.
Re: Modifying Standard Gear Box
Posted: Fri Apr 27, 2018 4:08 pm
by PainlessWolf
HEEEEY!
I resemble that remark. *huffs* ( Beautiful gearbox tho' )
regards,
Painless
Re: Modifying Standard Gear Box
Posted: Sat Apr 28, 2018 2:47 am
by c.rainford73
These are simply amazing you should take a bow!
Re: Modifying Standard Gear Box
Posted: Sat Apr 28, 2018 6:19 am
by Kostyanchik
Walter, excellent performance
How do the new gearboxes manifest themselves in the motion?
I'd love to watch the video.
Re: Modifying Standard Gear Box
Posted: Sat Apr 28, 2018 9:46 am
by walter
Hi Kostyanchik,
The gear boxes perform better then I expected.
I am really pleased with them.
I tried to post a video. but each time I tried the web site turned itself of.
May be some one can help how to post a video?
Walter
Re: Modifying Standard Gear Box
Posted: Sat Apr 28, 2018 1:18 pm
by walter
Hi Mick,
I intended to use silver steel but by mistake used some ordinary steel. I found out while trying to harden the cutter. No I have not a grinding set up.I turned the cutter in the lathe then marked out 6 divisions and filed the teeth to shape.
Back to hardening the cutter.
I do not enjoy making special tools needed to produce parts. So having spend time making the gear cutter and not able to harden it,did not make me feel very happy.Then came the spark I remembered I had some case hardening powder some where. To members that are not familiar with case hardening. It is quite a simple process you heat what ever you want to case harden to a red hot coulor then quickly dip it into the powder. For a cutter with such small teeth I did that process only 3 times. The theory is the steel will absorb carbon from the powder and it is possible to achieve almost o.5mm of hardening surface.To harden you heat up again to a red hot coulor and dip it strait into cold water. The surface will be almost glass hard it does not be need to annealed. With my cutter I did cut a lot of gears in brass and steel. The down side of case hardening is you are limit in re sharpening. Because the hard surface is very thin.
Walter