Small honing tools

[Chris BaetensParticipant @chrisbaetens16442]

Hi guys,

Where do I get small honing tools. I was thinking of 3/4", and even smaller. I need these to finish stirling engine cilinders. Or maybe there's someone out there using homemade honing tools, and is willing to share his idea..?

Thanks in advance

Chris

[Chris BaetensParticipant @chrisbaetens16442]

[VersabossParticipant @versaboss]

For such an application lapping is much easier than (real) honing. Small honing tools are available, but at a price driving water into your eyes!!! Google pemamo.

A lapping tool can even made from hard wood, and Chinese diamond pastes are cheap.

Greetings, Hansrudolf

[Jens Eirik Skogstad 1Participant @jenseirikskogstad1]

For precision lapping such as in model engine or similar, use rod or ring (in case lapping at rod to example) made of copper, brass or cast iron + lapping paste.

[David LittlewoodParticipant @davidlittlewood51847]

Chris,

Go to **LINK** and download the Bruce Engineering catalogue. On about page 70 (the pages are not numbered) you will see a 1/2" to 1 1/4" cylinder hone for about £15. Have one, works fine.

David

 

Edited By David Littlewood on 27/09/2012 23:10:59

[Mike WainwrightParticipant @mikewainwright87512]

Chris

They are on ebay as well for about £12.00 -£15.00

[Phil PParticipant @philp]

Those three legged hones that Bruce and others sell are not true hones, they are what used to be called a "Glaze Buster".

A true hone will bring a tapered or out of round hole back true again, the spring loaded type will not as they just follow the existing bore.

I am not criticising the spring loaded type because they do have their uses, just pointing out that they are not a cheap alternative to a proper Delapena type hone.

I agree with the other comments above, just make a split lap and do it that way. Very easy and very cheap.

Phil

[JohnFParticipant @johnf59703]

Also consider a lead lap, easy to make by casting lead into a mould with a BMS rod to hold it–make a fair bit oversize then turn to size and "load" with lapping paste — cuts like a dream and will produce a round parallel hole. You can also add a tapered pin to expand the lap as required.

[Ian S CParticipant @iansc]

        I find a wooden lap is adiquate for my Stirling Engines, I put a cut down the center of it, an either use a little wooden wedge, or a wood screwin the end to expand the lap. When you finish the course grit, change to another bit of wood for the finer stuff, I sometimes go from brass polish to toothpaste to finish, just to get a mirror like surface.

        I must try the lead lap, got about 200Kg of lead, so that will go a long way.    IanS C

 

Edited By Ian S C on 28/09/2012 11:59:48

[wheeltapperParticipant @wheeltapper]

You been up on the church roof again Ian?

Roy

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