My humble pinions

My humble pinions

This topic has 8 replies, 6 voices, and was last updated 10 December 2021 at 14:25 by Jouke van der Veen.

Viewing 9 posts - 1 through 9 (of 9 total)

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8 December 2021 at 16:18 #574696
Steve Crow
Participant
@stevecrow46066
I spent the weekend cutting gears.

There are 3X12, a 14, 15, 16, 18 and a 20 tooth, all Mod 0.3.

More sizes than I really need but setting up for pinion cutting is a bit of a pain so I thought I would "future proof" my parts box. You never know when you might feel a five-speed gearbox coming on.

Steve
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8 December 2021 at 16:18 #31385
Steve Crow
Participant
@stevecrow46066
8 December 2021 at 16:22 #574697
John Haine
Participant
@johnhaine32865
Nice!
8 December 2021 at 16:29 #574698
Brian H
Participant
@brianh50089
Hello Steve, nice work. What are they intended for?

Brian
8 December 2021 at 16:55 #574702
Steve Crow
Participant
@stevecrow46066
Thanks Brian, I will be using some for a 1/12 scale V8 for the cam gear train and some more for a tumbler reverse gear in the matching gearbox.

Also I may use some for motion work in a clock project and to make a spur gear differential.

Steve
8 December 2021 at 17:57 #574711
Nigel Graham 2
Participant
@nigelgraham2
Fine work!

'

May I make a suggestion applicable to any divided and parted-off batch-work, such as hexagons, not only gear-cutting, in that style?

I found it better, if possible, to make initial parting-tool grooves in the appropriate places first, to very slightly below the roots of the features (spanner flats, I think I was making).

Then perform the milling, which does not mind working across grooves provided you go steady with the break-throughs if using a slot-drill.

In this way the parting-off is never on 'orrible interrupted cuts.
8 December 2021 at 18:11 #574714
Steve Crow
Participant
@stevecrow46066
Thanks Nigel, I did initially consider pre-parting them and I now wish I did for a few of them.

My problem is, apart from half a dozen gears, I don't know how thick I might want any other pinions to be.

I hate parting off gears. The teeth act like a musical box with a loud high pitched whine.
8 December 2021 at 22:22 #574729
Vic
Participant
@vic
Nice job and I agree with the sentiment of making a few more than you need.
10 December 2021 at 14:25 #574903
Jouke van der Veen
Participant
@joukevanderveen72935
Parting off with a circular saw in a mill should avoid the “musical box” effect.
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