[SEL] bore and sleave an engine question

[peter ogborne]

----- Original Message ----- 
From: "Ben Frazer" <frazer.ben at gmail.com>
To: "The SEL email discussion list" <sel at lists.stationary-engine.com>
Sent: Thursday, July 06, 2006 6:00 PM
Subject: Re: [SEL] bore and sleave an engine question


> Hi all,
> 
> As I was saying earlier, you can sleeve a cylinder for free with
> nothing more than a decent lathe and a bit of knowledge (a small bit
> will do coz I managed)! I will now try to briefly explain how we did
> our 6hp throttle gooverned Famous.
> 
> Firstly, we went to our local diesel engine re-builder and asked for
> some used wet sleeves at the correct diameter for a 6hp Famous, I
> think about 6" from memory. After we were given the sleeves (because
> they were in the scrap heap anyway), we went back to the shed where
> the lathe was. The lathe we used for the job had to be about 6' to 8'
> between centres.
> 
> We began by removing the top of the tailstock. The base was left on
> the bed then a plate was made to fit on the tailstock base and a 3"
> bearing was fitted to the plate, paying carefull attention to getting
> it absolutely square to the bed.
> 
> We then removed the tool post and replaced it with a flat machined
> plate with a locating dowell that fits in the same hole as the tool
> post, therefore it can be swivelled to allow for setting up.
> 
> We then clamped our 8' length of 3" shaft in the chuck which we
> drilled and tapped about half way along in th side to allow for a
> tool.
> 
> After this set up was finished we began seting up the barrel on the
> saddle of the lathe and after about an hour with shims and a dial
> indicator we were ready to bore!
> 
> A couple of hours later we had bored the cylinder out to our pre
> determined size and we removed it from the machine.
> 
> In about 10 minutes flat, we had the machine back as a lathe. I then
> made a dummy centre for the sleeves and set each one up in the four
> jaw chuck. I then simply turned them to about .004" interferance on
> the bore of the barrel and parted them off to size. (I had to use two
> sleeves to get the length of the barrel because trucks don't have that
> long a stroke)!
> 
> After all the machining was completed, we heated up the barrel,
> dropped in the sleeves and honed them out to size. Now, you can't even
> see the join between the two sleeves and the engine runs like a clock.
> We now have the set up to turn the lathe into a boring machine and can
> use for lots of different engines.
> 
> Hope this story can help others to do their own sleeving without the
> high cost of casting pistons or paying someone for sleeving.
> 
> Ben
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