Keyboard Shortcuts
Likes
- Unimat
- Messages
Search
|
Re: turning very slender stainless steel objects on a SL
Richard Pender
Hello Richard, ? ? ? ? ? ? ? ? ? ? ?The problem has gone away for now- I persevered with very light cuts and a final polish with fine emery.? But I am continuing with the making of a traveling steady as there will no doubt be future occasions for it's use! Regards Richard Pender
On Saturday, 2 March 2019, 20:36:23 GMT, richard.hanes@... [UNIMAT] wrote:
?
Could you use 1/8" stainless rod, turning down each end to 2.5mm for threading 7BA? The pivot hole in the diisc enlarged to 1/8" to suit.?? That has the added advantage of a shoulder to help with location (at right angles to the face) and to provide a firm stop for fully tightening the thread into the regulator face. Richard. |
||
|
Re: turning very slender stainless steel objects on a SL
Could you use 1/8" stainless rod, turning down each end to 2.5mm for threading 7BA? The pivot hole in the diisc enlarged to 1/8" to suit.?? That has the added advantage of a shoulder to help with location (at right angles to the face) and to provide a firm stop for fully tightening the thread into the regulator face. Richard. |
||
|
Re: turning very slender stainless steel objects on a SL
Bill Williams
I love the details on the Victorian machinery!? Bill in Boulder CO USA
toggle quoted message
Show quoted text
On 3/2/19 4:00 AM, Richard Pender penderrgp_uk@... [UNIMAT] wrote:
? ? ? ? ? ? ? ? ? ? ?Thanks, that is food for thought for the current project .In the longer term I am contemplating the construction of a 1/2" scale model of an early GWR broad gauge locomotive - which has slender, tapered, ball ended hand rail pillars along both sides of it's running plates: perhaps I will have access to a decent lathe by then as there is no way a SL could handle the other, functional components for it! |
||
|
Re: turning very slender stainless steel objects on a SL
Richard Pender
Hello, ? ? ? ?Yes, indeed 3/32"BSW was "LBSC's" first option but I have his second option 7BA taps & dies for which 2.5mm is the top diameter. The thread at one end certainly needs to be a good fit since the plain part will have to be @90* to the port face.? (Yes I know that threaded items should not be used as locations, but that is the way the old "master" designed it and there is no way in which it could be assembled into the boiler with the rod in already fitted into the regulator body, as a press fit.) ?I am far from the firs to trip-up through following his "words and music" Regards, Richard
On Friday, 1 March 2019, 15:46:10 GMT, Carl carl.blum@... [UNIMAT] wrote:
?
Hi Gang: How about 7BA threaded rod ( 316?) with 2.5mm tubing cut to length over it? Carl. On 3/1/2019 8:06 AM,
richard.hanes@... [UNIMAT] wrote:
? |
||
|
Re: turning very slender stainless steel objects on a SL
Richard Pender
Hello, ? ? ? Probably yes, but sourcing the tubing could be a problem, remembering that less than 1/2" of it would be needed! Regards
On Friday, 1 March 2019, 18:40:24 GMT, Jeffrey Kropp jeffreykropp1@... [UNIMAT] wrote:
?
I am reminded of an old machinist's saying about which stainless is easier to work with: "303, nice to me, 304, she's a wh@re." Not meaning to offend anyone, just quoting..
|
||
|
Re: turning very slender stainless steel objects on a SL
Richard Pender
Hello, thanks for your interest,the diameter of tubing is not of concern in this instance since the rod is to provide a pivot pin for the disc valve of the regulator valve within the boiler (I have already made the body and valve parts and have used 7BA instead of the 3/32" BSW that "LBSC" had as a first option. The threads need to be a tight fit since it will be subjected to alternate screwing/unscrewing forces an will be in an environment of boiling water/steam at 80 psig and I would not trust "Loctite"alone, inside a boiler. I must admit , I would not have produced such a poorly detailed design myself! regards
On Friday, 1 March 2019, 16:19:59 GMT, 'Mckee, Don - Contractor {PEP}' donmckee@... [UNIMAT] wrote:
?
Would a 7BA threaded rod fit inside a 2.5mm tube?? Since this in an LBSC design I¡¯m assuming it¡¯s part of a steam engine.? Can you get the 2.5mm OD tube and 7BA threaded rod in stainless steel? ? Don ? From: UNIMAT@...
Sent: Friday, March 1, 2019 9:46 AM To: UNIMAT@... Subject: Re: [UNIMAT] Re: turning very slender stainless steel objects on a SL ? ? Hi Gang: How about 7BA threaded rod ( 316?) with 2.5mm tubing cut to length over it? Carl. On 3/1/2019 8:06 AM, richard.hanes@... [UNIMAT] wrote:
?
|
||
|
Re: turning very slender stainless steel objects on a SL
Richard Pender
Hello Richard, ? ? ? ? ? ? ? ? ? ? ?Thanks, that is food for thought for the current project .In the longer term I am contemplating the construction of a 1/2" scale model of an early GWR broad gauge locomotive - which has slender, tapered, ball ended hand rail pillars along both sides of it's running plates: perhaps I will have access to a decent lathe by then as there is no way a SL could handle the other, functional components for it! regards Richard
On Friday, 1 March 2019, 13:06:30 GMT, richard.hanes@... [UNIMAT] wrote:
?
Hi Richard, Thinking that LBSC would not have specified metric rod (?) would 3/32" be OK? You might need to re-make the mating part, of course! ? 3/32" was often threaded 7BA by LBSC (though it is a fraction small) and 303 stainless will be much easier to thread than 316 grade!?? I have used 7BA on 3/32 stainless for studs on the steam chests of my big 3.5" gauge loco (28 bore x 50 stroke) with every satisfaction. 3/32" stainless in 303 is available from Macc Model Engineers and several other suppliers. Hope that helps? Regards,? Richard.
|
||
|
Re: Elderberry Steam Engine Kit
?I had heard that the Elderberry kits are based on a Elmer's design. I am very impressed with the packaging, components and manuals. They even included a small wall chart on thread sizes etc. I have most of the Edelstaal kits and they seem crude in comparison , but then again one is new and the other is from 51 years ago.
?Jeff |
||
|
Re: turning very slender stainless steel objects on a SL
Hi Richard,
If you do get stuck on this one silly detail, give me a shout. I have access to a range of machines and if necessary can cut the size you need from something bigger - or at least have a good try at it!
Regards,
Keith? s. Angus,
In Slough ---In UNIMAT@..., <penderrgp_uk@...> wrote : On reflection, in the short term,? perhaps I should seek a UK based retailer of a small length of 2.5mm dia grade 316 st. st.!! (I do not think the Unimat SL would be very happy with big cuts owing to it's general lack of mass and rigidity while the manufacture of the steady will become a project in it's self - I will have to get the iron casting made and jig bored to accept the extended cross slide bars by others.)? Richard |
||
|
Re: turning very slender stainless steel objects on a SL
We used to machine up small components from 316 without any problems, cutting and doming odd rods, and turning up and threading larger pieces. Polished it up nicely too. No special tools, no big hassle. I haven't tried it on the Unimat, but I can't see why not. Keith ---In UNIMAT@..., <mdupreno1@...> wrote : 316, she's real mean?
Martin P.
|
||
|
Re: turning very slender stainless steel objects on a SL
Major? diameter of 7 BA IS 2.5 mm.
toggle quoted message
Show quoted text
---In UNIMAT@..., <donmckee@...> wrote : Would a 7BA threaded rod fit inside a 2.5mm tube?? Since this in an LBSC design I¡¯m assuming it¡¯s part of a steam engine.? Can you get the 2.5mm OD tube and 7BA threaded rod in stainless steel? ? Don ? From: UNIMAT@... <UNIMAT@...>
Sent: Friday, March 1, 2019 9:46 AM To: UNIMAT@... Subject: Re: [UNIMAT] Re: turning very slender stainless steel objects on a SL ? ? Hi Gang: How about 7BA threaded rod ( 316?) with 2.5mm tubing cut to length over it? Carl.
|
||
|
Re: turning very slender stainless steel objects on a SL
?I heard the cleaned up version in Machine tools class long ago "303 is for me, 304 is a chore" . The plant that I used to working in made Handi-Wrap, a food product so everything was either "soft" or 6061T6 aluminum or Stainless. Our "maintaince" crew used to have problems with the Stainless work hardening when making parts. They would run ever thing (mill/Lathe) until the chips that were flying were blue and then stop and then go back and start shattering bits.
?Jeff |
||
|
Re: turning very slender stainless steel objects on a SL
316, she's real mean?
Martin P.
-----Original Message----- From: Jeffrey Kropp jeffreykropp1@... [UNIMAT]
?
I am reminded of an old machinist's saying about which stainless is easier to work with: "303, nice to me, 304, she's a wh@re."
Not meaning to offend anyone, just quoting..
|
||
|
Re: turning very slender stainless steel objects on a SL
I am reminded of an old machinist's saying about which stainless is easier to work with: "303, nice to me, 304, she's a wh@re." Not meaning to offend anyone, just quoting..
|
||
|
Re: turning very slender stainless steel objects on a SL
¿ªÔÆÌåÓýWould a 7BA threaded rod fit inside a 2.5mm tube?? Since this in an LBSC design I¡¯m assuming it¡¯s part of a steam engine.? Can you get the 2.5mm OD tube and 7BA threaded rod in stainless steel? ? Don ? From: UNIMAT@... <UNIMAT@...>
Sent: Friday, March 1, 2019 9:46 AM To: UNIMAT@... Subject: Re: [UNIMAT] Re: turning very slender stainless steel objects on a SL ? ? Hi Gang: How about 7BA threaded rod ( 316?) with 2.5mm tubing cut to length over it? Carl. On 3/1/2019 8:06 AM, richard.hanes@... [UNIMAT] wrote:
?
|
||
|
Re: turning very slender stainless steel objects on a SL
¿ªÔÆÌåÓýHi Gang: How about 7BA threaded rod ( 316?) with 2.5mm tubing cut to length over it? Carl. On 3/1/2019 8:06 AM,
richard.hanes@... [UNIMAT] wrote:
? |
Jim Korman
Carl