Cracker Steam Engine

[Kevin BennettParticipant @kevinbennett25223]

Hi guys has any one got a set of drawing for a small Cracker steam engine that are better than the one’s on the John Tom site as i an struggling with the gears i need to make for the drive.

The 6 drawing are a bit woolly overall, so if anyone has better set i would be grateful.

Thanks Kevin

[Kevin BennettParticipant @kevinbennett25223]

[JasonBModerator @jasonb]

Look clear enough on my screen

Gearwheel is 40teeth, 0.5MOD, 3mm wide, 3mm bore

Pinions are 10teeth, 0.5MOD,3mm wide over the teeth, 4mm wide boss x 4mm dia, ( 0.5mm boss each side), 3mm bore

Edited By JasonB on 04/11/2014 18:52:49

[John BaguleyParticipant @johnbaguley78655]

Hi Kevin,

Yes, I've got a set in jpeg form. Can't remember where they came from now but they seem clear. If you pm me with your email address I'll send them to you.

John

[Kevin BennettParticipant @kevinbennett25223]

thanks for the info I can see it now must of had a bad day as being disabled my medication knocks me out and I go into a zone

can you get gear cutters that small or is there any other methods or can you purchase them but I suppose that is the easy way out as I have never cut gears

thanks Kevin

[Keith LongParticipant @keithlong89920]

Kevin if you want to buy – have a look at the Technobots website under steel gears for models. Just a happy customer of theirs.

Yes you can get commercial cutters – certainly for the 40 tooth – CTC Tools have one listed but not for the 10 tooth pinion. I suspect at that tooth number you're into modified form teeth.

HPC have the gears liusted in various materials – what matyerial do you actually need?

Ivan Laws book will give you the information for making the cutters yourself .

Lots of options really

[roy entwistleParticipant @royentwistle24699]

Kevin Wheel and pinion cutters are available from firms who supply clockmakers like Meadows and passmore or Cousins The price will make your eyes water

Roy

[Ryan NortonParticipant @ryannorton40317]

HI Kevin

I used the drawings from John Tom that were in PDF form and found them to be relatively good.

I made my own gears and pinion in the lathe and they 'turned' out fine!

I've also made a couple of changes to the overall look of the little loco.

See pics below

If you need any info on the build, let me know!

Good luck with yours!

[Ian S CParticipant @iansc]

Just a thought, is there anything suitable in Meccano in the way of gears?

Ian S C

[Kevin BennettParticipant @kevinbennett25223]

hi Guys this is my Cracker to date after several weeks work I still have some parts to make and making the gears I keep putting it off as I have never made gears before so it will be a challenge.

I have had the oscillating engine working and runs ok

thanks Kevin

My Photos

[geoffParticipant @geoff]

hi the gears are available from http://www.hobby.uk.com

[Kevin BennettParticipant @kevinbennett25223]

thanks for that I will have a look as it may be the best way forward

ty Kevin

[Ryan NortonParticipant @ryannorton40317]

Nice Cracker Kevin!

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