Diamond sandpaper

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Diamond sandpaper Peter Fairbrother 03-05-2008
Posted by John Stevenson on March 5, 2008, 6:01 pm
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 On Wed, 05 Mar 2008 11:20:53 +0000, Peter Fairbrother

>Does anyone know where to but diamond sandpaper? Sheets, not disks. I'm
>not looking for a lot.
>
>Thanks
>
>Peter Fairbrother

Not sandpaper but what about the diamond foam blocks from Arc ?

http://www.arceurotrade.co.uk/Catalogue/Diamond-Tools/Diamond-Stones

Towards the bottom of the page.
I presume you want something that's flexible ?

.

Posted by Peter Fairbrother on March 5, 2008, 9:47 pm
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 John Stevenson wrote:
> On Wed, 05 Mar 2008 11:20:53 +0000, Peter Fairbrother
>
>> Does anyone know where to but diamond sandpaper? Sheets, not disks. I'm
>> not looking for a lot.
>>
>> Thanks
>>
>> Peter Fairbrother
>
> Not sandpaper but what about the diamond foam blocks from Arc ?
>
> http://www.arceurotrade.co.uk/Catalogue/Diamond-Tools/Diamond-Stones
>
> Towards the bottom of the page.
> I presume you want something that's flexible ?

I want to polish some turbine blades in a very small turbine wheel
machined form solid - the blades are about 6 mm long, 4mm deep, and 2 mm
apart.

I need something thin, in order to get into the 2 mm gaps, flexible
because the blades are curved, and hard because the wheel is made from
Inconel.

That's why I thought diamond sandpaper - cut it into strips, fasten the
ends into bands, and drive with a dremel or mini-belt-sander or something.

Though finishing the concave surface is going to be ... interesting! ...

-- Peter Fairbrother

Posted by Norman Billingham on March 6, 2008, 7:23 am
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> John Stevenson wrote:
>> On Wed, 05 Mar 2008 11:20:53 +0000, Peter Fairbrother
>>
>>> Does anyone know where to but diamond sandpaper? Sheets, not disks. I'm
>>> not looking for a lot.
>>>
>>> Thanks
>>>
>>> Peter Fairbrother
>>
>> Not sandpaper but what about the diamond foam blocks from Arc ?
>>
>> http://www.arceurotrade.co.uk/Catalogue/Diamond-Tools/Diamond-Stones
>>
>> Towards the bottom of the page.
>> I presume you want something that's flexible ?
>
> I want to polish some turbine blades in a very small turbine wheel
> machined form solid - the blades are about 6 mm long, 4mm deep, and 2 mm
> apart.
>
> I need something thin, in order to get into the 2 mm gaps, flexible
> because the blades are curved, and hard because the wheel is made from
> Inconel.
>
> That's why I thought diamond sandpaper - cut it into strips, fasten the
> ends into bands, and drive with a dremel or mini-belt-sander or something.
>
> Though finishing the concave surface is going to be ... interesting! ...
>
> -- Peter Fairbrother

Micromesh (https://www.micro-surface.com/default.cfm?page_id=97) is very
flexible and does a very good job on curved surfaces - though being more of
a woodworker I use a piece of 8000 grit glued to a bit of MDF to give chisel
edges a quick touch. Turns out they do have UK distributors (see web site)
though none quotes a price. I got mine from a tutor so have never bought it
direct.



Posted by Tony Jeffree on March 6, 2008, 8:11 am
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On Thu, 6 Mar 2008 12:23:42 -0000, "Norman Billingham"
<norman.at.tumulus.org.uk> wrote:

>Micromesh (https://www.micro-surface.com/default.cfm?page_id=97) is very
>flexible and does a very good job on curved surfaces - though being more of
>a woodworker I use a piece of 8000 grit glued to a bit of MDF to give chisel
>edges a quick touch. Turns out they do have UK distributors (see web site)
>though none quotes a price. I got mine from a tutor so have never bought it
>direct.

I have some of the regular Micromesh stuff that I bought as a sample
pack - it seems to last for ages and works extremely well. They do
various grades bonded onto plastic spatulas - e.g.,:

https://www.micro-surface.com/default.cfm?page_id=90&ID=4NX122&storeid=1

and abrasive swabs, e.g.:

https://www.micro-surface.com/default.cfm?page_id=90&ID=3F17113V&storeid=1

Regards,
Tony

Posted by Mark Rand on March 6, 2008, 7:27 am
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wrote:


>
>I want to polish some turbine blades in a very small turbine wheel
>machined form solid - the blades are about 6 mm long, 4mm deep, and 2 mm
>apart.
>
>I need something thin, in order to get into the 2 mm gaps, flexible
>because the blades are curved, and hard because the wheel is made from
>Inconel.
>
>That's why I thought diamond sandpaper - cut it into strips, fasten the
>ends into bands, and drive with a dremel or mini-belt-sander or something.
>
>Though finishing the concave surface is going to be ... interesting! ...
>
>-- Peter Fairbrother

Send us a snail mail address and I'll send a sheet each (they're about A6
size) of 1, 5 and 12 micron Aluminium oxide lapping sheet (can't remember if
I've got any 30 micron). It's single sided, about 2-3 thou thick, very flat.
Think plastic shim stock with graded grains on one side.. Abrasive layer is
fairly delicate, but it will impart an optical mirror finish on things. Used
some on hardened steel last night.

If that works, ok. If it works but is short lived, then you can invest in the
much more expensive diamond stuff.

Mark Rand
RTFM

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