By continuing to use this site, you agree to our use of cookies. Find out more
Forum sponsored by:
Forum sponsored by Forum House Ad Zone

My humble pinions

All Topics | Latest Posts

Search for:  in Thread Title in  
Steve Crow08/12/2021 16:18:24
308 forum posts
191 photos

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.


John Haine08/12/2021 16:22:57
4643 forum posts
273 photos


Brian H08/12/2021 16:29:15
2312 forum posts
112 photos

Hello Steve, nice work. What are they intended for?


Steve Crow08/12/2021 16:55:30
308 forum posts
191 photos

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.


Nigel Graham 208/12/2021 17:57:12
2056 forum posts
28 photos

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.

Steve Crow08/12/2021 18:11:26
308 forum posts
191 photos

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.

Vic08/12/2021 22:22:02
3062 forum posts
8 photos

Nice job and I agree with the sentiment of making a few more than you need. wink

Jouke van der Veen10/12/2021 14:25:57
171 forum posts
17 photos

Parting off with a circular saw in a mill should avoid the “musical box” effect.

All Topics | Latest Posts

Please login to post a reply.

Magazine Locator

Want the latest issue of Model Engineer or Model Engineers' Workshop? Use our magazine locator links to find your nearest stockist!

Find Model Engineer & Model Engineers' Workshop

Latest Forum Posts
Support Our Partners
Eccentric July 5 2018
Rapid RC
Eccentric Engineering
Subscription Offer

Latest "For Sale" Ads
Latest "Wanted" Ads
Get In Touch!

Do you want to contact the Model Engineer and Model Engineers' Workshop team?

You can contact us by phone, mail or email about the magazines including becoming a contributor, submitting reader's letters or making queries about articles. You can also get in touch about this website, advertising or other general issues.

Click THIS LINK for full contact details.

For subscription issues please see THIS LINK.

Digital Back Issues

Social Media online

'Like' us on Facebook
Follow us on Facebook

Follow us on Twitter
 Twitter Logo

Pin us on Pinterest