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| Proxxon PD400 |
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| Pete.:
Get the book - I have 'how to run a lathe' and 'Screwcutting in the lathe' - but also get stuck in! Getting comfortable and familiar with your lathe is just as important, and will help the theory to 'make sense' in a way you can really relate to if you've had the problems and struggled with them. |
| wongster:
Sure Pete. Lots of reading from now. My elder girl has just started her secondary school education (age 13, in case the term used is different). I'm like going back to school with her... :D Regards, Wong |
| wongster:
Hi guys, I was considering getting the ER32 collet chuck with MT3 shank from CTC Tools but couldn't figure out how to use a drawbar on this lathe. the bore at the end of the spindle is 20.5mm and If I make a draw bar with a big head, I've to leave the gear box compartment open as the box will be in the way of the drawbar bolt head. This got me to wonder; what can the MT3 bore be use for then? Regards, Wong |
| Miner:
Wongster, Depending on your own thoughts and future needs? You might be better off building a spindle adapter that uses the ER-32 collets and the collet nut. This allows longer work to pass thru the collet and use the hollow spindle on your lathe. Without that your somewhat limited to short work pieces or using a tailstock live/dead center or the fixed steady. My own opinion is that it's a much better setup. There's numerous examples showing how people designed and built them on this and many other forums. With anything inserted into your lathes MT 3 spindle taper it's an absolute requirement that both the male and female tapers are spotless. MT's work by a wedgeing action. A .001 piece of swarf or dirt will reduce that holding power and possibly damage your internal spindle taper. Dead centers can be used in your headstock while turning between centers. Which by the way is the most accurate way of turning work if it has to be removed and rotated end for end for further work. Even more accurate? Turn up a piece of scrap material while it's held in the 3 jaw with a 60 degree included angle that matches your center drills. With work bolted to your cross slide, Then drill chucks, Boreing heads etc can be also used in the heastock taper. I know exactly just how tough it is to not get impatient and start building parts, But with my own hindsite experience? I'd highly recommend reading at least once that GHT book before ordering any accesories or even going much further with your new lathe. You'll be far more educated and have a much better ability to judge exactly what you want to do. In the long run that will save you money or possibly even permanent damage to your equipment. Pete |
| wongster:
Hi Pete, The book should arrive sometime this week, I hope. I wrote to Hemingway Kits towards the end of last week to check the status of my order as I only received a note saying that my order has been received. I was told that it was sent out on the 10th and to allow 7 to 10 days for delivery. I wanted to try to turn between centers last weekend but didn't have a face plate and a lathe dog for this lathe (I've them for my Sherline). I was checking out the Proxxon's pics on their "Centre Turning Accessories". They're sold as a set with a faceplate with 30mm bore, a drive pin that screw onto the headstock flange and faceplate, with 2 reducing bushings (30/20mm and 30 to 15mm), and 2 centers (MT2 and MT3). This looks like a project I can add to my list. On the use of the MT3 taper, you mentioned this: "Turn up a piece of scrap material while it's held in the 3 jaw with a 60 degree included angle that matches your center drills. With work bolted to your cross slide, Then drill chucks, Boreing heads etc can be also used in the heastock taper.", which I don't quite understand. Can you elaborate? Also, can I hold drill chucks and Boring head in the headstock taper without using a drawbar of sort to hold them to the headstock? When I use a drill chuck in my Sherline headstock (with MT1 taper), a drawbar holds the drill chuck. With the PD400, I don't know how a drawbar can be used with the 20.5mm spindle bore. I've the 2 pics here to illustrate what I mean. The spindle bore can be seen through this hole on the gearbox cover: With the gearbox opened: Regards, Wong |
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