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Ross
Steam Legend!!
Joined: 20 Jun 2009
Posts: 5609
Location: Lincolnshire UK
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 Posted: Tue Feb 28, 2012 5:50 pm Post subject: |
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I made the end cap for the cylinder today, It wasa little fiddly to make but I got there.
First I turned the diameter of the bore,
Then I turned the diameter of the part that will fit into the recess,
I cut the material in half and worked backwards facing the length.
I purposely left and overlap on the length of the end cap I was going to make it flush but I decided against it. I put a taper on the cap too.
Here is the finished article:
And fitted on the cylinder.
I'll have a go at soldering it at the weekend, enough work for one day!
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Ross
My Website
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MrDuck
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Joined: 05 Mar 2010
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Location: Sweden, Uppsala
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| Posted: Tue Feb 28, 2012 6:17 pm Post subject: |
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That looks tops 
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ozsteamdemon
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Joined: 13 Aug 2008
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Location: Victoria Australia
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| Posted: Wed Feb 29, 2012 1:35 am Post subject: |
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Keep up the good work there Rossco ! 
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magpie38
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Joined: 11 Nov 2009
Posts: 11862
Location: Chester-le-Street, Co Durham, North East England
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| Posted: Wed Feb 29, 2012 1:38 am Post subject: |
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| excellent job so far well done |
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scorpion2nz
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Joined: 27 Apr 2008
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Location: Hawkes Bay NZ
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| Posted: Wed Feb 29, 2012 5:04 am Post subject: |
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you are getting there slowly
But are you taking photos with the lathe running ??
if so I would have thought that inadvisable
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Ross
Steam Legend!!
Joined: 20 Jun 2009
Posts: 5609
Location: Lincolnshire UK
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| Posted: Thu Mar 01, 2012 1:15 am Post subject: |
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| scorpion2nz wrote: | you are getting there slowly
But are you taking photos with the lathe running ??
if so I would have thought that inadvisable |
No worries Dennis, I don't take cuts while taking a photo. And I take them fri. Further than it may seem. I resize and crop some of th photos to 'zoom' them in more.
I also like the look of metal while it's spinning, just personal preferce 
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Ross
My Website
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Youtube
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Albert.rivero
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Joined: 29 Oct 2010
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Location: Barcelona (Catalonia)
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| Posted: Thu Mar 01, 2012 7:14 pm Post subject: |
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Looking good, mate!
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Ross
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Joined: 20 Jun 2009
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Location: Lincolnshire UK
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| Posted: Sat Mar 03, 2012 4:59 pm Post subject: |
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I soldered the cap on today,
And out of curiously I polished it too!
Now I've neely finished the cylinder, I've just got to drill and tap the hole for then trunion pin. It needs to be M3, I got a set of taps for Christmas, but I wouldn't trust a tap as small as that from the set!
So I need to buy a high quality tap and drill, I've found a 3mm tap, it's a reduced to £3 would it be okay just to get a plug tap?
(15th down)
http://www.tap-die.com/contents/en-uk/d140_Metric_taps.html
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Ross
My Website
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Youtube
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Roly Williams
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| Posted: Sat Mar 03, 2012 6:12 pm Post subject: |
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It's impossible to start a thread with a plug tap. You'll need a taper tap to start the thread, a 2nd to do most of the cutting and (for a blind hole) a plug to finish. The set should include all three types for each size. Tapping into brass should be fairly easy so use the set. It's pointless having a set if you don't use it. You can replace individual taps as and when necessary. This shouldn't be too often if you're careful.
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Roly Williams
"Opportunity is missed by most people, mainly because it is dressed in overalls and looks like work" (Thomas Alva Edison) |
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Mambrozevich
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Joined: 07 Dec 2009
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| Posted: Sat Mar 03, 2012 6:37 pm Post subject: |
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| very nice wish i had room for a lathe |
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Dean W
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| Posted: Sun Mar 04, 2012 12:30 am Post subject: |
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| Roly Williams wrote: | | It's impossible to start a thread with a plug tap. |
That's confusing (for me). They must make taps completely different in England.
Sounds like you need a second tap if you only plan to buy one, Ross.
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MrDuck
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| Posted: Sun Mar 04, 2012 8:05 am Post subject: |
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Ross, instead of assuming you can or can't trust any tool you got, perhaps you should try it out on a piece of scrap equivalent to the piece you're working on?
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Roly Williams
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| Posted: Sun Mar 04, 2012 9:01 am Post subject: |
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| Dean W wrote: | | Roly Williams wrote: | | It's impossible to start a thread with a plug tap. |
That's confusing (for me). They must make taps completely different in England.
Sounds like you need a second tap if you only plan to buy one, Ross. |
What I understand as a plug tap is one intended to cut right down to the bottom of a blind hole, with no taper and with a completely square end. The only way you could start cutting a thread with it is if the hole was tapered - not a good idea. Maybe you use different terminology your way.
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Roly Williams
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Ross
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Joined: 20 Jun 2009
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Location: Lincolnshire UK
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| Posted: Mon Mar 05, 2012 2:12 am Post subject: |
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Okay thanks guys,
I'll do what Petri says, and just try one of my m3 taps on a bit of scrap brass to re assure myself that it won't snap,
its only I don't fancy making that cylinder again because my dodgy tap snapped
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Ross
My Website
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scobby12
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Joined: 01 Dec 2009
Posts: 758
Location: New Zealand
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| Posted: Mon Mar 05, 2012 2:30 am Post subject: |
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| Roly Williams wrote: | | Dean W wrote: | | Roly Williams wrote: | | It's impossible to start a thread with a plug tap. |
That's confusing (for me). They must make taps completely different in England.
Sounds like you need a second tap if you only plan to buy one, Ross. |
What I understand as a plug tap is one intended to cut right down to the bottom of a blind hole, with no taper and with a completely square end. The only way you could start cutting a thread with it is if the hole was tapered - not a good idea. Maybe you use different terminology your way. |
You can use a plug tap to start you just have to careful use a counter sink to taper the hole a bit, this will center the tap and works every time you just have to be careful not to go to fast. |
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