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Hi, Having owned and "disowned" a Sieg C1 micro lathe for the past 18 months or so I can certainly understand your frustration and concern about the different standards of chuck mounting "options". The registration boss serves no purpose than to help in " aligning" the chuck with center of...

Hi, You may be able to get away from using rings all together , if you are using air or none super heated steam. Cast iron rings and steam, I am not sure about, but the other stuff will work. You may have to experiment in the end to see which one suits best. Nylon, Teflon, Ptfe, Viton and even...

Hi, That is an interesting question as when I made the piston and the rings for the Webster engine following instructions, the result was not good. There also appears to be some disagreement amongst the more knowledgable and experienced members as to the size of the piston and as a result the...

Hi to all of you, Many many thanks for your kind help and taking time to help me out with this problem. I am really indebted to you all for your advice and help. Best regards, A.G

Hi Kvom, The part is actually held horizontally, parallel to the Y axis as I need to bore the cylinder holes and the mounting screw holes and the air feed channels for each cylinder on every flat, in fact if this cnc thing works out I might as well zero the tool on the center of the cylinder...

Hi kvom, I am very gratefull for your offer. The object is to be machined in to a hexagonal shape, is for the cranck case of a rotary engine. The material is 6082 T6 Aluminium, the diameter of the cylinder ( workpiece) is 1.75" and the distance between the two flats is exactly 1.5" therefore...

Hi to all, Thanks to everyone who replied to my post, I have looked at the surfacing wizard and I think that I might be able to adapt it for what I want doing but then the rotary will have to be done manually, not a big deal. Will try and see what I could come up with. I don't know any...

Hi, I need to machine a cylinder in to a hexagonal shape. It is mounted on a rotary table and set up for manual machining. The mill is equiped for cnc and so is the rotary table, a Sherline 4" one, I do have a copy of Mach3, is there anyway of obtaining a cnc code to do this? I have absolutely...

Hi, A rear mounted tool ( up side down ) works well for parting operations, in theory you should be able to part larger diameter work piece due to the more rigid set up, I do not see any advantage for normal turning. I do not like the way the tip of the tool is sort of obscured from vision...

Hi, Have a look at this site, it can be adapted for an X2 and you can use tracing paper to make it, cheap and no postage. http://www.ixen-cnc.com/2007/10/leadscrew-cover-for-your-sherline-mill.html Regards, A.G

Hi, Before parting with a lot of cash you need to find out if you could actually have the ability to operate a lathe or a mill. why don't you find out if there are any model engineering clubs and society near you and give them a visit, they might even agree for you to get your hands on a...

Hi Brian, I hope Micheal doesn't mind if I asked a question. I eventually finished the engine this afternoon, subsequently I sacked the piston with the cast iron rings, it just didn't seem to give enough compression. I had already turned another piston to suit the Viton O ring and this one is...

Hi Mike, Follow Brian's instructions. The BOM could be taken from the Webster engine plans, and likewise from the putputman's tiny plans. I am just about finishing the Webster at the moment and comparing the size the tiny may need less precious metal. Good Luck, A.G

Hi, I am not clear as wether the holes are prallel or perpendicular to each other? In any case you do not need a punch mark, grab the part between two indentical v blocks in the vise ( using the mill of course ) and using an edge finder find the edge of the bar using the inside edge of the...

Hi , I am a relative newbie too as I have only been in this hobby for just over 18 months. If you intend to use a small machine for a hobby then I'd suggest that you go manual rather than cnc. For model engine building it is a lot easier and quicker to do things manually. A power assisted...

Hi, Forget silver solder or the soft plumming stuff unless you are looking for disaster. What you want is silver brazing and this takes a lot of heat to make the paste fuse itself in to the metal, it is a metallurgical process . There are some silver brazing stuff that you could get that come...

Hi everybody, I am about to start the build of a 3 cylinder radial air engine based on Elmer's no11 design. I will machine the cylinders out of 1.25" brass rod as the square design of Elmer's does not appeal to me. I was thinking of using carbon graphite filled ptfe rod for piston mainly to...

Hi everybody, I am about to start the build of a 3 cylinder radial air engine based on Elmer's no11 design. I will machine the cylinders out of 1.25" brass rod as the square design of Elmer's does not appeal to me. I was thinking of using carbon graphite filled ptfe rod for piston mainly to...

Hi, Many thanks to all of you who replied. I have turned the rings exactly as described without heat teatment for normalising. I have a slight concern over the size and the thickness of these rings but that is another matter. I will source some GR17 as soon as possible. The last piece of...

Hi, Could someone please tell me what is the best grade of cast iron for making piston rings using the cold turn method? The only two grades that I can find easily here in the UK are GR17 and SG (GGG40). Many thanks for your help. Regards, A.G