By continuing to use this site, you agree to our use of cookies. Find out more
Forum sponsored by:
Forum sponsored by Allendale Jan 24th

Fly press weights.

All Topics | Latest Posts

Search for:  in Thread Title in  
larry phelan 121/01/2020 09:47:33
574 forum posts
11 photos

Good morning all,

Having now got my flypress set up on its new bench, I am looking for ideas about how to make weights for it. Suitable lumps of cast iron are somewhat thin on the ground around here. Even the local scrapyard has nothing much to offer [scrapyards are not what they used to be ]

Any ideas ? I,m sure some of you have been there, done that.

Thanks in advance for any ideas.

RichardN21/01/2020 09:54:16
112 forum posts
9 photos

Large bean can full of lead on each arm... I've seen that in many workshops.

Paul Lousick21/01/2020 09:55:19
1280 forum posts
511 photos

Dumbbell exercise weights are a source of cast iron discs.

Paul

Edited By Paul Lousick on 21/01/2020 09:56:48

David George 121/01/2020 10:01:31
avatar
1053 forum posts
333 photos

Have some cast. Make a wooden or plastic model, two halves of a sphere. And a core mould for the hole to match the top of the handle. You could sell spares.

David

noel shelley21/01/2020 11:35:08
72 forum posts

It would not be rocket science to cast them on the stubs in lead. They would then fit well. Use a ball as a pattern to make a split mold in plaster of paris. set up on stub, seal bottom with clay or plaster, hole in top. Pour in lead. leave for 30mins open, repeat on other stub if needed. Simples ! Noel.

noel shelley21/01/2020 11:36:15
72 forum posts

If You need more details PM me.

not done it yet21/01/2020 12:41:22
3911 forum posts
15 photos

Cement works local? They will use large cast balls. Generally, up to about 100mm.

Jeff Dayman21/01/2020 12:44:02
1717 forum posts
45 photos

Surely some sawcut and drilled steel cylindrical shapes would function just the same as spheres on a flypress? Much cheaper and easier to obtain than custom spherical castings I expect. All edges chamfered for safety of course.

If they need to be hollow / lead filled, they could be fabbed from steel tube and a steel disk welded together then lead cast in.

Baz21/01/2020 14:01:54
316 forum posts

Couple of old cannonballs, drilled and filed to fit?

BOB BLACKSHAW21/01/2020 14:28:17
262 forum posts
59 photos

If you need any advice on tooling and how the press can be used for fine limit work. PM me.

Bob

old mart21/01/2020 15:20:52
1075 forum posts
109 photos

As already mentioned, exercise weights would be useful, and there are a lot of unwanted ones about. Whatever weight you use, make sure it is secure on the press, as they can fly off, I have witnessed it happen.

Buffer21/01/2020 15:35:33
128 forum posts
34 photos

Float from a toilet valve in sand then pour in molten lead.

Bandersnatch22/01/2020 01:37:53
avatar
1395 forum posts
40 photos
Posted by Paul Lousick on 21/01/2020 09:55:19:

Dumbbell exercise weights are a source of cast iron discs.

... as long as you don't need to machine them too much. I tried these for a model-engine flywheel once - the skin went all the way through. Quality they are not (nor need to be in their intended use).

Paul Lousick22/01/2020 04:26:01
1280 forum posts
511 photos

Exercise weights are made from similar cheap cast iron as used in sash window weights. Sometimes it is OK to machine but Murphys Law says that most of the time it is crap. But they are cheap and good if used in the right application. Car brake discs are better souce of machinable cast iron if it is a suitable size to suit the application.

Paul.

bricky22/01/2020 07:31:59
401 forum posts
47 photos

Lead as suggested in a mould ,if plaster of paris is not availiable use scimming plaster from a building merchants.

Frank

Bazyle22/01/2020 09:41:46
avatar
4888 forum posts
195 photos

Modern exercise weights are concrete with a plastic sheath. If the mounting is a spike like mine or just a rod you can make a mould of that out of plasticine, cast a soft plaster 'spike', cast a concrete block around that and dig out the plaster. No point in using anything more expensive than concrete as size is not an issue.

AJW22/01/2020 10:46:38
avatar
278 forum posts
117 photos

On my flypress I used an old 3 jaw chuck nipped up on the stub, worked well enough!

Alan

Paul Lousick22/01/2020 11:58:02
1280 forum posts
511 photos

One of the options given was to to use concrete but if you would like the weight to be heavier for its size, add lead or steel to the mix.

One of the companies which I worked for manufactured industrial cranes like the ones on building sites but much bigger and the cost of cast iron or steel for the counter weights was expensive. The weights were more than 20 tonnes each. They were made by casting concrete using steel as the aggregate. Mainly from the discarded pieces remaining after punching parts from steel plate. The smaller the parts, the better because you can pack in a higer proportion of steel. For the flypress weight you could use any small metal objects, nuts, bolts, lead fishing weights, etc. Use concrete, polyester resin, builders joint filler or other bonding agent to hold the casting together.. The mould coukd be simply a childs plastic ball.

Paul

Circlip22/01/2020 12:18:52
1012 forum posts

"Where have all the foundrys gone, Long time passing .........."

Pity you're not in China or India.

Regards Ian.

ega22/01/2020 12:46:27
1435 forum posts
115 photos
Posted by old mart on 21/01/2020 15:20:52:

As already mentioned, exercise weights would be useful, and there are a lot of unwanted ones about. Whatever weight you use, make sure it is secure on the press, as they can fly off, I have witnessed it happen.

I accepted a set from a friend with this in mind only to find that the outer plastic casing contained some brownish-coloured material that definitely wasn't CI.

Does anyone know what alternatives to CI are used fro this purpose?

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
emcomachinetools
Warco
ChesterUK
Allendale Electronics
Eccentric July 5 2018
cowells
Ausee.com.au
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