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12 minutes ago, Russell griffiths said:

Ere mr @Onoff do you reckon you can knock one of these up. 

 

 

 

It's finding a pizza wheel that big that's the problem! :)

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Brilliant.......i tried to make something similar before I started my roof but I couldn't get the saw blade to fit in the lathe :( 

 

unless I try cutting and sharpening it while it is in the table saw.......  ?

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17 minutes ago, Construction Channel said:

Brilliant.......i tried to make something similar before I started my roof but I couldn't get the saw blade to fit in the lathe :( 

 

unless I try cutting and sharpening it while it is in the table saw.......  ?

Please video that

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55 minutes ago, Construction Channel said:

Brilliant.......i tried to make something similar before I started my roof but I couldn't get the saw blade to fit in the lathe :( 

 

unless I try cutting and sharpening it while it is in the table saw.......  ?

 

If it's not a TCT blade, then using an angle grinder whilst the blade is spinning on the table saw should work OK.  I've done something similar with a Dremel grinding wheel on hardened steel spinning in the lathe - it's the way I sharpen centre punches, just to save softening them, turning a new point, then hardening and tempering them again.

 

I wouldn't try it with a TCT saw blade, though, as they will chew up the angle grinder and probably spit bboken TCT blade tips out, as the brazed joints holding the TCT tips give way.

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Bullet Tools who make the manual, push cutter bench in the video do some rather interesting blades:

 

https://www.bullettools.com/blades/

 

Ref the circular saw blades they do 10" (254mm) and 7.25"(184mm) 15.875mm ones. But the 0.625" bore is 15.875mm. My Evolution 185mm circular saw has a 16mm bore so guessing the American one wouldn't fit? 

 

They appear to also do a similar hand saw to the one @PeterStarck was given to cut his icynene.

 

I couldn't find the  push cutter in the video on the site, mind I am waiting for the Neurofen to kick in! 

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I just tried (on the quiet :ph34r: ) a cheapo pizza wheel on a bit of 25mm pir. Cuts it like a dream! You need to ideally push the blade against the non foiled end like in the video. Pushing the blade into the foiled face and there's some resistance. 

 

I wonder how thick a say 300mm dia blade would need to be to remain rigid whilst offering as little resistance as possible?

 

Scale it up and job done!

 

20180513_093549.thumb.jpg.cf82999411e350528ac212432acb43f6.jpg

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We screwed a Stanley blade at 45 degrees to the end of a piece of batten and added a tee at the other end parallel to the blade. It cut 350mm slices of 25mm in seconds with a cut through the top, spin it over then along the back. 

 

Made for very consistent and easy cutting !!

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I reckon a 400mm disc so you could cut +150mm thick.

 

How to sharpen then a say 2mm thick disc?

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