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Flywheel help please

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Linda Thompson13/02/2018 17:11:48
4 forum posts
Hi, can anyone tell me where I can get a 5 spoked alloy flywheel with a diameter of between 10in & 11.5in
Linda Thompson13/02/2018 18:31:31
4 forum posts
I've been recommended to ask Myfordboy. Anyone know how I can get in touch with him ?
Billy Bean13/02/2018 18:34:54
174 forum posts
1 photos

Try a google search - website and contact details are all there.

JasonB13/02/2018 18:36:18
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I deleted my suggestion as his is 6 spoke not 5 but if that will do you his contact details are on his blog

I think you are going to have a hard time finding what you are after. 5 spoke flywheels are not that common so that will narrow things down and the other factor is weight as aluminium ones don't work as well as ones made from something heavier

Can I ask what it is for?

Edited By JasonB on 13/02/2018 18:37:11

Bob Stevenson13/02/2018 18:36:24
221 forum posts
3 photos

You can contact 'myfordboy' by email....if I recall you can find it at the front of his youtube channel.

You can also tackle the people who have castings for model engineers such as 'College Engineering' as they may either be able to supply a casting or make you one......

Linda Thompson13/02/2018 18:43:38
4 forum posts
Thank you, I have emailed him
BDH13/02/2018 20:35:34
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Another option is to have the five spoke flywheel CNC'd.

Brian

John Baron13/02/2018 20:55:17
30 forum posts
1 photos

Hi Linda,

Have a look around a scrapyard at washing machine pulleys. Most have five spokes and are made of alloy, though some are plastic. I have several, one of the plastic ones I made into a lathe handle.

JasonB04/03/2018 10:25:36
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Well with the recent thread on completing posts I thought I would post this as we all like a happy ending.

Although I had removed my suggestion of contacting Myfordboy due to his flywheel being 6 spoke and not 5 spoke he was able to print a pattern for the required pulley and cast one for Linda. Video of it here from screen to finished item.

J
PS Just waiting for my commission nowwink 2

Billy Bean04/03/2018 10:43:40
174 forum posts
1 photos

Daft question time as the first time I have seen a casting video.

Why is the flywheel wooden bit in two parts as opposed to being in one piece ?

A very interesting video and the casting looks superb - a commentary on what and why he was doing would have helped me understand it more.

Thanks.

BB

not done it yet04/03/2018 11:26:59
1724 forum posts
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If the one piece pattern was embedded in sand, one could not remove it. If making a 3-D printed pattern and burning it out before casting, one could use a single piece pattern.

Andrew Johnston04/03/2018 11:33:33
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Posted by Billy Bean on 04/03/2018 10:43:40:

Why is the flywheel wooden bit in two parts as opposed to being in one piece ?

It's a slightly odd way of doing it. Of course you need to mould the drag and cope separately. Often the halves of the pattern are mounted on each side of a board. Then locating pins are used on the drag to pick up holes in the moulding board and cope so everything should be aligned automatically.

Andrew

Cornish Jack04/03/2018 12:02:05
737 forum posts
90 photos

Absolutely fascinating, mind-boggling expertise!! thumbs upthumbs upthumbs up

Obviously, he's done it once or twice before but how long did it take, overall, and how would you cost up that manufacturing sequence?

rgds

Bill

Edited By Cornish Jack on 04/03/2018 12:02:22

Neil Wyatt04/03/2018 12:14:37
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Another reason for printing a 2-part pattern is that it avoids having an 'underside' with a less than perfect surface finish.

Neil

Stewart Hart04/03/2018 12:20:06
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Posted by Linda Thompson on 13/02/2018 17:11:48:
Hi, can anyone tell me where I can get a 5 spoked alloy flywheel with a diameter of between 10in & 11.5in

You can try getting one laser cut there's plenty of jobbing shops with laser cutters around all you need to do is send them a drawing and ask for a quote

This is one I had done.

dsc02309.jpg

And the completed fly wheel

dsc02340.jpg

Stew

JasonB04/03/2018 13:13:14
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It is possible to do a sand casting with a one piece pattern, lay the pattern in teh bottom of the drag box, pack sand around it in the usual way but when you turn it up the other way you need to carfully carve away the sand down to the half way point. You then dust with talc and ram up the cope as you would with a 2 piece pattern. First casting I ever did was done that way using a Mamod flywheel as the pattern. Gives a perfect finish to both sides.

Having the two halves on match boards is the ideal way for production or small batch work buy one offs or short runs it is as quick to do them without a board which is what I have done for the last few I have had cast. Also means the foundry can often squeeze them into the corner of a larger box to keep costs down. Just use pegs and sockets to line up the two halves. You can just about see the pegs/sockets on these.

 

Edited By JasonB on 04/03/2018 13:14:08

Edited By JasonB on 04/03/2018 13:21:05

Linda Thompson06/03/2018 20:11:12
4 forum posts
My flywheel arrived today made by myfordboy and it is perfect. Cant recommend him highly enough.
BDH06/03/2018 20:25:37
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709 forum posts
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Posted by Linda Thompson on 06/03/2018 20:11:12:
My flywheel arrived today made by myfordboy and it is perfect. Cant recommend him highly enough.

So pleased that someone on here was able and willing to help.

Brian

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