A Challenge – How Would You Machine This Part?

[Nicholas FarrParticipant @nicholasfarr14254]

Hi Andrew, I have to agree that your kitchen is just shame-full, as Martin has said, all that precious metal relegated to the floor, not to mention the elf and safety issues of bending down to pick it up. Have you not considered putting more units with bigger worktops in.

 

Regards Nick.

[JasonBModerator @jasonb]

The way you have the parts laid out is a serious waste of space, you should consider combining the engines and the tabel into one unit that even her in doors will be happy to have in the house.

 

J

[Sub MandrelParticipant @submandrel]

Here’s one I made earlier (without the benefit of CNC…) above the smaller gear before being bored and parted off, below the final pair.

 

Neil

 

[Anonymous]

I’ll have you know the plants were all of the edible variety. Turns out that the courgettes were a bit of a disaster, but the peppers and chillies that are in the picture are still going strong in the greenhouse. Great in a salad and useful to give a curry a bit of zip!

 

Main problem with ‘elf ‘n’ safety is that I’m not strong enough to lift the boilers onto the worktop. It was bad enough getting them out of the car and into the kitchen, even with the help of my neighbour and his son, plus a decent sack trolley.

 

I’m not even going to show the tool and measuring equipment store; sorry I mean the dining room.

 

Neil: Gears made using the parallel depth tooth method I assume? I’m planning to use the same to make the mitre gears for the governors on the traction engine. Partly because they’ll be much too small to be practical by CNC and partly because I haven’t used the method before, so it will be instructive.

 

Regards,

 

Andrew

 

[Ian S CParticipant @iansc]

Neil, I’m looking for a pair of gears just like that, the last two I hadcame from some WW2 surplus equipment. Do you reckon I could do a lash up job with a fly cutter? Ian S C

[Sub MandrelParticipant @submandrel]

Hi Ian,

No reason why not – the teeth on that pair are just over a millimeter long and they run together nicely, although when I’ve made bevels a bit bigger they came out even better.

 

There’s nothing wrong with parallel depth bevels, I understand they were much used in WWII as it reduced the demand on specialist equipment. I find they run nice and smoothly.

 

I use Ivan Law’s method, I might write up the procedure for an article.

 

Neil

[Ian S CParticipant @iansc]

The gears that I used last time(as above) were I beleave made by Meccano during the war, the only difference is the hole size of 1/4″. Ian S C

[Anonymous]

The denouement; here are all the parts for the complete differential:

 

And the assembled differentails; for scale the OD is about 12 inches.

 

Regards,

Andrew

[Sub MandrelParticipant @submandrel]

Very nice!

 

Neil

[Author]

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