Author Topic: Boley 4LV  (Read 43550 times)

Offline awemawson

  • Global Moderator
  • Hero Member
  • *****
  • Posts: 8265
  • Country: gb
  • East Sussex, UK
Re: Boley 4LV
« Reply #75 on: January 05, 2020, 03:11:54 AM »
Very nice Mark.

John Winter ( Johnwinter.co.uk ) for ferrosilicate

Andrew Mawson
East Sussex

Offline RotarySMP

  • Sr. Member
  • ****
  • Posts: 403
  • Country: at
Re: Boley 4LV
« Reply #76 on: January 05, 2020, 05:04:09 AM »
Thanks for the link Andrew. The only suppliers I had found were chinese, and will sell it by the ton.
Mark
Best regards, Meilleures salutations, Mit freundlichen Grüßen, Cu salutari
Mark
https://www.youtube.com/c/RotarySMP

Offline PekkaNF

  • Hero Member
  • *****
  • Posts: 2452
  • Country: fi
Re: Boley 4LV
« Reply #77 on: January 05, 2020, 06:10:09 AM »
I did a foundry tour video last week, which answers those questions.
....
Mark

Thank you, that was very interesting and information is really good.

Pekka

Offline RotarySMP

  • Sr. Member
  • ****
  • Posts: 403
  • Country: at
Re: Boley 4LV
« Reply #78 on: January 05, 2020, 06:54:27 AM »
Thanks for the feedback
Mark
Best regards, Meilleures salutations, Mit freundlichen Grüßen, Cu salutari
Mark
https://www.youtube.com/c/RotarySMP

Offline mattinker

  • Hero Member
  • *****
  • Posts: 1290
  • Country: fr
Re: Boley 4LV
« Reply #79 on: January 23, 2020, 08:32:49 AM »
Thanks for the link Andrew. The only suppliers I had found were chinese, and will sell it by the ton.
Mark

Mark,

I just got a quote from John Winter, £3.50/kg, minimum 100kg  silicon at 75%. Shipping to France, £135

A bit beyond my budget! Cheers, Matthew

Offline awemawson

  • Global Moderator
  • Hero Member
  • *****
  • Posts: 8265
  • Country: gb
  • East Sussex, UK
Re: Boley 4LV
« Reply #80 on: January 23, 2020, 08:49:03 AM »


I will mark your end of term report 'Must try harder searching for things '  :clap:


eBay :

https://www.ebay.co.uk/itm/FERRO-SILICON-Pieces-750g-Si-75-86-Fe-23-89-1-6mm-FREE-P-P/254387618810?hash=item3b3aaf03fa:g:yo4AAOSw5nJeJttt

(£14.50 free delivery from Nottingham - 750 grams)

https://www.ebay.co.uk/itm/FERRO-SILICON-Pieces-1500g-Si-75-86-Fe-23-89-10-50mm-FREE-P-P/372798633338?hash=item56cc87b57a:g:iAIAAOSwM~tacFaN

(£18.50 free delivery from Nottingham for 1500 grams)


Andrew Mawson
East Sussex

Offline mattinker

  • Hero Member
  • *****
  • Posts: 1290
  • Country: fr
Re: Boley 4LV
« Reply #81 on: January 23, 2020, 10:01:43 AM »


I will mark your end of term report 'Must try harder searching for things '  :clap:


eBay :

https://www.ebay.co.uk/itm/FERRO-SILICON-Pieces-750g-Si-75-86-Fe-23-89-1-6mm-FREE-P-P/254387618810?hash=item3b3aaf03fa:g:yo4AAOSw5nJeJttt

(£14.50 free delivery from Nottingham - 750 grams)

https://www.ebay.co.uk/itm/FERRO-SILICON-Pieces-1500g-Si-75-86-Fe-23-89-10-50mm-FREE-P-P/372798633338?hash=item56cc87b57a:g:iAIAAOSwM~tacFaN

(£18.50 free delivery from Nottingham for 1500 grams)

Thanks Andrew, you'll have to do online courses in searching!

Offline RotarySMP

  • Sr. Member
  • ****
  • Posts: 403
  • Country: at
Re: Boley 4LV
« Reply #82 on: January 23, 2020, 11:03:12 AM »
I also contacted John Winter buy they did respond. Thanks for that link Andrew. The Dash in the name was the key. I'd dearched Ebay before, but only found US venders.
Mark
Best regards, Meilleures salutations, Mit freundlichen Grüßen, Cu salutari
Mark
https://www.youtube.com/c/RotarySMP

Offline PekkaNF

  • Hero Member
  • *****
  • Posts: 2452
  • Country: fi
Re: Boley 4LV
« Reply #83 on: January 23, 2020, 11:37:50 AM »
How much of that you need? in proportion of the melt?

Offline RotarySMP

  • Sr. Member
  • ****
  • Posts: 403
  • Country: at
Re: Boley 4LV
« Reply #84 on: January 24, 2020, 08:25:18 AM »
No idea. Once I get some, I'll go through Luckygen1001 and Olfoundryman's Youtube channel as they have some stuff on FeSi.
Mark
Best regards, Meilleures salutations, Mit freundlichen Grüßen, Cu salutari
Mark
https://www.youtube.com/c/RotarySMP

Offline mattinker

  • Hero Member
  • *****
  • Posts: 1290
  • Country: fr
Re: Boley 4LV
« Reply #85 on: January 24, 2020, 10:03:22 AM »
How much of that you need? in proportion of the melt?

I contacted Luckygen, he uses .25% to 0.5%. This must be added at the end of the melt and poured within ten minutes!
Regards, Matthew

Offline mattinker

  • Hero Member
  • *****
  • Posts: 1290
  • Country: fr
Re: Boley 4LV
« Reply #86 on: January 24, 2020, 10:09:26 AM »


I will mark your end of term report 'Must try harder searching for things '  :clap:


eBay :

https://www.ebay.co.uk/itm/FERRO-SILICON-Pieces-750g-Si-75-86-Fe-23-89-1-6mm-FREE-P-P/254387618810?hash=item3b3aaf03fa:g:yo4AAOSw5nJeJttt

(£14.50 free delivery from Nottingham - 750 grams)

https://www.ebay.co.uk/itm/FERRO-SILICON-Pieces-1500g-Si-75-86-Fe-23-89-10-50mm-FREE-P-P/372798633338?hash=item56cc87b57a:g:iAIAAOSwM~tacFaN

(£18.50 free delivery from Nottingham for 1500 grams)

Thanks Andrew, you'll have to do online courses in searching!

Andrew,
I have another search problem, then I'll stop high jacking this thread! I'm looking for a graphite sleeve or bush, 80mmx 100mm long with a 60mm bore, so far I've drawn a blank , any ideas? Regards, Matthew

Offline awemawson

  • Global Moderator
  • Hero Member
  • *****
  • Posts: 8265
  • Country: gb
  • East Sussex, UK
Re: Boley 4LV
« Reply #87 on: January 24, 2020, 11:09:20 AM »
Mathew, I may have some in my 'EDM Sinker' box of electodes - I'll have a look tomorrow morning

(The big maker / supplier of graphite as used for EDM electrodes is 'Poco' so meanwhile search on that  :thumbup: )
Andrew Mawson
East Sussex

Offline awemawson

  • Global Moderator
  • Hero Member
  • *****
  • Posts: 8265
  • Country: gb
  • East Sussex, UK
Re: Boley 4LV
« Reply #88 on: January 25, 2020, 07:58:36 AM »
Matthew,

My bigger bits of graphite are:

BAR:
50 diam X 85
155 diam x 65
37.5 diam x 225

SLAB
270 x 210 x 20

(All dimensions mm)



Andrew Mawson
East Sussex

Offline mattinker

  • Hero Member
  • *****
  • Posts: 1290
  • Country: fr
Re: Boley 4LV
« Reply #89 on: January 25, 2020, 08:19:49 AM »
Andrew,
Thank you for looking! I am looking for a cylinder, 80mmx100 with a bore of 55mm, so, a bit bigger than anything you have! I have found the POCO Graphite site and I'll do some telephoning on Monday. I have found a very interesting youtube video on making air bearings using graphite, my idea is to make an air-bearing tool holder for my Clarkson tool and cutter grinder!

Thanks again, regards Matthew

Offline awemawson

  • Global Moderator
  • Hero Member
  • *****
  • Posts: 8265
  • Country: gb
  • East Sussex, UK
Re: Boley 4LV
« Reply #90 on: January 25, 2020, 08:54:56 AM »
So what advantage has the graphite over bronze, or mild steel even?

When the air is applied shaft and housing do not contact each other, so it is only if the air supply fails when the spindle is still driven that there is any issue, and a pressure switch and air reservoir should cope with that contingency  :scratch:
Andrew Mawson
East Sussex

Offline mattinker

  • Hero Member
  • *****
  • Posts: 1290
  • Country: fr
Re: Boley 4LV
« Reply #91 on: January 25, 2020, 10:51:19 AM »
The advantage over metals is that is porous so the compressed air doesn't depend upon drillings to to create the cushion of air and that it is possible to bore it accurately by hand. With a chrome plated rod there would be no risk of corrosion!

Offline awemawson

  • Global Moderator
  • Hero Member
  • *****
  • Posts: 8265
  • Country: gb
  • East Sussex, UK
Re: Boley 4LV
« Reply #92 on: January 25, 2020, 11:58:49 AM »
Sintered bronze bushes are porous so don't rule them out if the graphite isn't forthcoming (need to flush the lube out first though)
Andrew Mawson
East Sussex

Offline mattinker

  • Hero Member
  • *****
  • Posts: 1290
  • Country: fr
Re: Boley 4LV
« Reply #93 on: January 26, 2020, 08:31:23 AM »
Andrew,

Thanks for the idea, I've found another solution, 4x100mm squares, 25mm  thick that I can stack to get the size I want. Off to order an off-cut of chromed bar!

Cheers, Matthew

Offline RotarySMP

  • Sr. Member
  • ****
  • Posts: 403
  • Country: at
Re: Boley 4LV
« Reply #94 on: January 26, 2020, 10:33:33 AM »
Thanks for posting the Ferosilicon ratio.

The threadjack doesn't bother me, but a project as cool as a home made air spindle for the Clarkson it worthy of it's own thread. I'll be watching out for that, as I have a Clarkson as well.
Mark

Best regards, Meilleures salutations, Mit freundlichen Grüßen, Cu salutari
Mark
https://www.youtube.com/c/RotarySMP

Offline awemawson

  • Global Moderator
  • Hero Member
  • *****
  • Posts: 8265
  • Country: gb
  • East Sussex, UK
Re: Boley 4LV
« Reply #95 on: January 26, 2020, 12:00:14 PM »
Matthew, beware that a fair amount of graphite came on the market a few years back  from behind the old 'Iron Curtain'  that was suspected to have come from 'test reactors' and was significantly radio-active  :bugeye:
Andrew Mawson
East Sussex

Offline Joules

  • Hero Member
  • *****
  • Posts: 1225
  • Country: gb
Re: Boley 4LV
« Reply #96 on: January 26, 2020, 12:26:37 PM »
Whilst mild radiation probably isn’t a major concern for wrinklies, better to be safe around younger generations.   Worth having in the workshop, especially with questionable scrap metals for the same reason as Andrew mentioned.

https://www.banggood.com/Geekcreit-Assembled-DIY-Geiger-Counter-Kit-Module-Miller-Tube-GM-Tube-Nuclear-Radiation-Detector-Geekcreit-for-Arduino-products-that-work-with-official-Arduino-boards-p-1136883.html?rmmds=mywishlist&cur_warehouse=CN
Honour your mentors, and pay it forward.

Offline mattinker

  • Hero Member
  • *****
  • Posts: 1290
  • Country: fr
Re: Boley 4LV
« Reply #97 on: January 26, 2020, 01:01:56 PM »
Matthew, beware that a fair amount of graphite came on the market a few years back  from behind the old 'Iron Curtain'  that was suspected to have come from 'test reactors' and was significantly radio-active  :bugeye:

Thanks for the warning Andrew, I'll risk it!

Offline mattinker

  • Hero Member
  • *****
  • Posts: 1290
  • Country: fr
Re: Boley 4LV
« Reply #98 on: January 26, 2020, 01:07:00 PM »
Thanks for posting the Ferosilicon ratio.

The threadjack doesn't bother me, but a project as cool as a home made air spindle for the Clarkson it worthy of it's own thread. I'll be watching out for that, as I have a Clarkson as well.
Mark

Mark,
I've only got as far as rough dimensions in my head, I've ordered the Graphite and a 70x190mm off-cut of chrome bar, it'll get clearer when the materials arrive!

Cheers, Matthew

Offline mattinker

  • Hero Member
  • *****
  • Posts: 1290
  • Country: fr
Re: Boley 4LV
« Reply #99 on: January 26, 2020, 01:09:40 PM »
Whilst mild radiation probably isn’t a major concern for wrinklies, better to be safe around younger generations.   Worth having in the workshop, especially with questionable scrap metals for the same reason as Andrew mentioned.

https://www.banggood.com/Geekcreit-Assembled-DIY-Geiger-Counter-Kit-Module-Miller-Tube-GM-Tube-Nuclear-Radiation-Detector-Geekcreit-for-Arduino-products-that-work-with-official-Arduino-boards-p-1136883.html?rmmds=mywishlist&cur_warehouse=CN

hmmmm, I think I'll risk it!!