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You could consider adding a chimney/flue to your existing set-up , a 10ft x 6in flue will provide sufficient daught for decent sized crucible furnace and take any fumes outside your shed. This would be my first choice as it is so quiet and peaceful. However coke is no longer available in the UK...

An interesting range of opinions , when I was at school , some 60 years ago , we were taught how to "silver solder" using a clipping from a silver coin , still some in circulation at that time , we were also taught how to "braze" using a piece of copper wire stripped from electrical cable. Much...

This is an ER20 chuck I made for my Pultra lathe from a piece of en24T. The nut was purchased off Ebay very cheap as were the collets , you can buy them one at a time as you need them. It fits the headstock or the tailstock using tubular drawbars so stock up to 10mm can pass through , although...

Parting off with the lathe running in reverse and the tool upside down does hit a problem with tool centre height . My Boxford - a Southbend clone made in the UK - has a fourway toolpost that takes a 12mm square tool obviously if the tool is upside down then it is 12mm below centre and there is...

Depends upon the diameter but a woodworking router will shift aluminium like crazy. I have made 12 inch and greater circles in inch thick aluminium plate using a trammel bar fixed to the router and a centre hole pivot. Dan.

That is very impressive aonemarine , what plastic are you using for the patterns ? my own experience of burning out printed plastics , albeit in block moulds , has not been promising as the pattern expansion prior to burning damages critical mould surfaces. Of course , as you know , this does...

Hi Lee and welcome to the forum. You have obviously given some thought to your project but having run a lost wax foundry for several years I think you may not realise the problems encoutered burning out printed patterns. Far better results can be obtained by taking silicone rubber moulds from...

As a fellow Imac user I can recommend 2D/3D ViaCad from Punch software , I started using this back in the day when Mac 3D cad was like rocking horse sh*t. Much cheaper than a new PC or buying solidworks , it will do everything you are likely to want and more. It is very easy to use and you will...

I saw this posted on another modelling forum , reading the replies to this thread reminded me of it ! Q: How many people does it take to change a light bulb on a Forum? A: 1 to change the light bulb and to post that the light bulb has been changed. 14 to share similar experiences of changing...

I make T bolts in the same way , much easier than machining from a larger diameter bar. Dan.

It does look very impressive but I cannot understand why you need it . For several years I operated my own small foundry producing non-ferrous sand castings and never once had use for a sand muller. I bought "petrobond" ready mixed in 25 kg bags . Petrobond is a facing sand and only a very small...

The Southbend is probably better if you can get a good one. I have the British made Boxford "A" which is a copy of the Southbend . These are very common in the UK as they were supplied to high school metal work shops by the thousand . Most have now been passed on to the model engineering...

So there's a good tip from packrat , don't pump water into a boiler that has run dry and is red hot ! A scenario which probably would be worse with a silver soldered boiler. Of course a sensible user wouldn't use a spirit burner that could contain enough fuel to completely evaporate the boiler...

For a simple pot boiler capable of driving an oscillator , soft solder is adequate and has been used for at least 100 years on models by Mamod and other manufacturers. We are talking a tube with flanged end plates and a couple of screwed pipe flanges , spirit fired and running at 15 -25 psi...

Dave , I believe my reply to this thread "Just curious as to what experience has been with the self centering 4 jaw versus the conventional individual jaw adjustment type." was exactly as requested by the originator. I am sure that the originator is well aware that the term "self centering"...

Since buying a 4 jaw self centering chuck for a job requiring the turning of a large quantity of square bar the chuck has hardly been changed , I find that it does everything that I would use a 3 jaw for and more.

Making a jig seems a lot of work for such a job as shown , why not simply make the nipples a push fit into the block and they would stay in position whilst being brazed ? Dan.

Jeniffer there are many variables such as what are the cylinders made of and what piston rings are you intending. Traditional graphite yarn and synthetic 'O'rings run well in polished bores , cast iron rings in cast iron cylinders might benefit from cross hatching. Personally I run a flexi-hone...

Hello all , I have for some time been removing the motors and control boards from powered treadmills. These are perfect for driving workshop machinery and the speed control is very useful. However my latest aquisition has a burned out circuit board. Does anyone know where I might obtain drawings...

Rich , I only use Goldstar Omega investment cement which I have found to be the most reliable for my way of working. My burn-out kiln holds 4 x 6" dia flasks 12" deep which is around 12 lbs each in weight of investment powder and can mean between 4 and several hundred castings. The heating cycle...