Glaze busting

[AndyD]

Hi,
Just a general question on what people do in terms of glaze busting before fitting new rings.
I've used a 3-leg spring loaded contraption before which seemed to work OK but would appreciate any advice / ideas etc. as it's something I've never been totally happy with.

Cheers,
Andy

[Johnwebley]

That sounds ok.

Plenty of light lubrication. I used WD40.

I used a long split pin with Emery in the slot.
Seems to work ok.takes away the shine without removing any metal.

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[Bryanj]

Big flap wheel

[AndyD]

Thanks,
Never sure how much to do or how crucial the 'pattern' in the walls is when complete.
I had seen a flex-hone tool which looked nice but downside that they come in specific sizes so not as 'universal' as the 3-leg tools.
John- agree to using lot of oil with the tool as I think it could get quite agressive if not. I guess the split pin and emery cloth is effectively a DIY flap wheel.
Bryan - what sort of flapwheel would you suggest, in terms of size / grit etc. and do you just run through the bores or try and achieve some sort of scratch pattern?
Cheers,
Andy

[taysidedragon]

I was taught by an aircraft engineer to make a diagonal cross-hatch pattern.
Use a fine grit so that you bust the glaze but remove as little metal as possible.

[Trigger]

The problem with most of the 3 leg type come with coarse stones and you want fine with a good X hatch 
If you go over the piston to bore clearances then, it is a rebore .

[MrDavo]

Big flap wheel

Who are you calling a big flap wheel?

[Bryanj]

Anybody who wants to accept the monicker mate!!

[AndyD]

I've been called a lot worse in the past!

In terms of the glaze buster tool - I can see 3-leg ones with 180 grit and a flex-hone with 240 grit on Amazon.
Is that the sort of thing that would be OK - most of the tools just say medium grit which I guess could be anything!

Cheers,
Andy

[davefirestorm]

I’ve used one of these on cylinders in the past ( Old Brit bikes ) easy to use in an electric drill giving nice overlapping x hatch pattern
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[AndyD]

Thanks Dave,
I think that's the flex-hone tool and looks like it could be worth a go
The one I looked at was 60mm (hopefully Ok to suit 56mm bore) and was 240 grit - might try it out.

Cheers,
Andy

[davefirestorm]

You could go quite a bit bigger as you can shove them up a much smaller hole but obviously more force needed and powerful drill,when I used one I held the single cylinder in lathe chuck and the flex-hone in a Jacobs chuck

[AndyD]

Thanks Dave
That’s one thing I wasn’t sure about - how near to the bore size the hone needed to be and no idea where to find out
Cheers
Andy

[Bryanj]

Needs to be bigger than bore to work propely but they are quite pricey, what i suggested(flap wheel) are a lot cheaper and fine for glaze busting. Used to be available at B&Q and many other places in various sizes and grades, used to get mine from our local engine parts supplier but they are few and far between now

[Bryanj]

Look at ebay  313048407521