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Your Own Design / Re: Vickers Inverted Engine
« Last post by Michael S. on February 15, 2025, 09:41:20 PM »I am very impressed. Nice!
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Your Own Design / Re: Vickers Inverted Engine« Last post by Michael S. on February 15, 2025, 09:41:20 PM »I am very impressed. Nice!
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From Kits/Castings / Re: Mery Explosive Engine« Last post by Chipmaster on February 15, 2025, 08:40:42 PM »Indeed Crueby, I had considered talking about cobblers.
Andy 13
Your Own Design / Re: Ohio Locomotive Crane« Last post by cnr6400 on February 15, 2025, 08:38:37 PM »![]() ![]() ![]() ![]() ![]() ![]() 14
Machines, Tools and Fixtures / Re: Maximum internal thread« Last post by Jasonb on February 15, 2025, 08:38:19 PM »You could always go with a finer pitch such as M10 x 1 rather than the usual M10 x 1.5 this is why pipe threads are finer than your typical fastener threads
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Machines, Tools and Fixtures / Re: Maximum internal thread« Last post by PaulR on February 15, 2025, 08:32:36 PM »A lot will depend on what the thread is doing, if under a lot of load you would not want to go as thin as you would if there was little load.Thanks for this. The use I was thinking of involves very little load, I was more concerned about tearing the material. If I had a scrap bin I'd give it ago but I haven't made any serious boo-boos in suitable material yet ![]() 16
Machines, Tools and Fixtures / Re: Maximum internal thread« Last post by Jasonb on February 15, 2025, 08:26:46 PM »A lot will depend on what the thread is doing, if under a lot of load you would not want to go as thin as you would if there was little load.
But yes a M10 thread could be cut in 1/2" bar and still be quite strong. 17
Machines, Tools and Fixtures / Maximum internal thread« Last post by PaulR on February 15, 2025, 08:10:21 PM »What's the maximum possible/advisable/sensible internal thread for a given size of bar and material. For example, would it be possible to cut an internal 10mm thread in a 1/2" round brass rod or is more 'meat' likely to be required? Seeing as it's perfectly possible to cut external threads of 1mm or less it seems like the inverse should apply. What about the same sizes in mild steel? Is there a rule of thumb?
Paul (Someone has to ask the daft questions right?) 18
Your Own Design / Re: Ohio Locomotive Crane« Last post by crueby on February 15, 2025, 07:58:36 PM »Nice! There are hardly any factories left in my part of the world except multi-nationals... I think I'd get short shrift if I turned up at Jaguar-Landrover asking for offcutsNo problem! Maybe stop by Jag and see if they have any leftover cars... 19
From Kits/Castings / Re: Mery Explosive Engine« Last post by crueby on February 15, 2025, 07:57:48 PM »Nice bit of shoemaking!
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Your Own Design / Re: Ohio Locomotive Crane« Last post by PaulR on February 15, 2025, 07:55:24 PM »Nice! There are hardly any factories left in my part of the world except multi-nationals... I think I'd get short shrift if I turned up at Jaguar-Landrover asking for offcuts
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