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Andrew Barclay Fireless (4mm scratchbuild)





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#26 PGH

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Posted 15 June 2018 - 16:30

Peckett chimneys.jpg

 

David is spot on - do as much as you can in the lathe, getting the fore and aft parts of the flare to the correct profile.  Then file the right and left sides to the correct shape and matching (not as straight lines shown in the second photo, that's only diagrammatic !) and then blend the fore/aft and right/left curves together.

While you're set up for turning its sometimes useful to do a spare just in case you don't get the filing right first time (hence the spare unfinished chimney)


Edited by PGH, 15 June 2018 - 16:33 .

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#27 5050

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Posted 15 June 2018 - 17:14

Thanks for the tips guys.  I might have another go now I've done it once.  I should have a round tip tool somewhere - or I might have to dig out my grinding wheel that I've had for years and never used!


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#28 PhilMortimer

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Posted 15 June 2018 - 19:59

I vaguely remember OzzyO showing how to make a dome / chimney flair in 7mm. The bulk of the workpiece was made turned up as described above, but he then used a milling bit in the lathe and a special tool holder on the lathe slide that held the work piece and rotated it to make the flair. I remember thinking that it was quite a clever way to make the flairs and I will have to see if I can find the relevant thread. but it might take me a while.



#29 PhilMortimer

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Posted 15 June 2018 - 20:09

Ah, here we are.http://www.rmweb.co....zzyo/?p=1282776

 

Very clever way of doing it, but not sure readily available the follower tool is.


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#30 5050

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Posted 15 June 2018 - 22:05

Ah, here we are.http://www.rmweb.co....zzyo/?p=1282776

 

Very clever way of doing it, but not sure readily available the follower tool is.

I remember the original article in MRJ and a mate of mine uses one.

 

But you have to machine it up yourself!



#31 PhilMortimer

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Posted 15 June 2018 - 22:51

Darn!

Being in the US these days, i’ve Never seen the article, so am not sure how difficult it is to make.

Cheers,

PM

#32 2mm Dabbler

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Posted 15 June 2018 - 23:37

Darn!

Being in the US these days, i’ve Never seen the article, so am not sure how difficult it is to make.

Cheers,

PM

Not too hard really. I made one some time ago to fit on a Unimat 3. It was took an evening to make with all machining done the machine itself, including motor cooling down periods and the fairly gentle cuts needed with steel on these machines to avoid stalling. I made it for Phil Badger who seemed satisfied with its performance. The original MRJ article was in issue 79, Geoff Helliwell describing its construction for his Cowells machine. I really must make one for myself.

 

As that issues long out of print I could send a scan in  few days if you're interested.

 

Michael

 

Edit: Colin Binnie may have been first (no surprise) http://www.webring.o.../wfvr.webs.com/


Edited by 2mm Dabbler, 16 June 2018 - 01:32 .

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#33 5050

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Posted 16 June 2018 - 11:55

Not too hard really. I made one some time ago to fit on a Unimat 3. It was took an evening to make with all machining done the machine itself, including motor cooling down periods and the fairly gentle cuts needed with steel on these machines to avoid stalling. I made it for Phil Badger who seemed satisfied with its performance. The original MRJ article was in issue 79, Geoff Helliwell describing its construction for his Cowells machine. I really must make one for myself.

 

As that issues long out of print I could send a scan in  few days if you're interested.

 

Michael

 

Edit: Colin Binnie may have been first (no surprise) http://www.webring.o.../wfvr.webs.com/

Ah, Geoff Helliwell, he of the N120 motor article.  I'll have to dig out the appropriate MRJ from the club library.  My lathe is a Cowells too so it will be useful.



#34 PhilMortimer

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Posted 18 June 2018 - 17:15

Not too hard really. I made one some time ago to fit on a Unimat 3. It was took an evening to make with all machining done the machine itself, including motor cooling down periods and the fairly gentle cuts needed with steel on these machines to avoid stalling. I made it for Phil Badger who seemed satisfied with its performance. The original MRJ article was in issue 79, Geoff Helliwell describing its construction for his Cowells machine. I really must make one for myself.

 

As that issues long out of print I could send a scan in  few days if you're interested.

 

Michael

 

Edit: Colin Binnie may have been first (no surprise) http://www.webring.o.../wfvr.webs.com/

Thanks,

 

If it is possible to see a copy of this, I would be very grateful. it might be very useful in the future.

 

ATB,

 

Phil M



#35 5050

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Posted 20 June 2018 - 17:16

Ah, Geoff Helliwell, he of the N120 motor article.  I'll have to dig out the appropriate MRJ from the club library.  My lathe is a Cowells too so it will be useful.

I've realised that I have that issue 79 myself so have now read it.  My friend with a version of it (for a Myford ML10) says he will bring it to the clubroom next week for me to see.  I seem to have enough bits of rod etc. but need a lump of steel to make the body.  I'm sure I can easily pick this up locally.