The Craftmans Shop > New from Old
The Sequel - Oh Blimey I bought a CNC Lathe (Beaver TC 20)
philf:
Is there enough meat in the teeth to drill holes for steel dowels for reinforcement? (And perhaps a steel sleeve over the OD below the teeth.)
nrml:
On mulling over this a bit further, is there any reason why printing this with ABS and treating it like a wax model for casting in bronze but using an excess of acetone to dissolve away the core instead of heat wouldn't work?
tom osselton:
Or try this
mattinker:
--- Quote from: awemawson on November 18, 2018, 12:02:17 PM ---I printed the second (Mk2) version earlier but not had time to try it yet, but also I've put an advert on the Home Workshop site asking for contacts who can cast bronze from an STL model - you never know! OK it's a bit of a cop out, but having lost wax cast myself years back I know the myriad of special bits and pieces you need to scrape together to do it. Also the special plasster has a short shelf life and only comes in big bags !
https://homeworkshop.org.uk/
--- End quote ---
It's not a cop out! To make a sand casting, it will need to be divided in two and given draft. This should be easy to do ! I attached a drwing in .png format, I can't see it in the preview.
Regards, Matthew
awemawson:
I've been put in touch with a couple of firms who may be able to to make a bronze cast from the STL model via the Home Workshop advert.
As an aside I was amused to find when fiddling with the PLA print and the original Beaver drive dog that they tessellate. All Beaver have done is to put a drive dog on the drive shaft that is identical to the Baruffaldi one on the powered tools and presumably make powered tools with fittings like the one I've made. i.e. they swapped which shape was on which !
I've just printed an ABS one that seems quite strong
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