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Old 11-12-2017, 05:58 PM   #21
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Marvin, I don't own, nor have I seen for sale here locally any new tooling with 1/2" WW. When I inquired of H&F why they bring in the machine with this thread in the drawbar, the salesman I spoke to didn't know that it was. Makes you sad, doesn't it? Unfortunately, the world today is not what it was or perhaps it's just that I'm getting old. Two drawbars would drive me nuts. I would make all the tooling M12. (Too be honest, I don't think you'll have any choice). Cheers, Peter


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Old 11-13-2017, 06:47 AM   #22
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I have to use 2 drawbars. Probably half my tooling is M12, the others 1/2 WW. I keep the appropriate drawbar with the matching tools and it's become a habit to change it so that I don't even notice I'm doing it. Would be nice to standardise but I can't afford to. Maybe one day.


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Old 11-13-2017, 07:33 AM   #23
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I agree with Cogsy and would go on to suggest thatas one's accessories grow, appropriate draw bars should be made/bought.
Furthermore, it is good engineering practice to have correct sized and tapped draw bars for other tools such as lathes and drilling machines.

I have a lot of the things

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Old 11-14-2017, 01:33 AM   #24
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Spoke to H^F they import the unit with a 1/2" draw bar but the guy mentioned there was another importer that brings them in with an M12 draw bar.
Does anyone know who this other importer might be?
If they have a replacement M12 draw bar it would save making one up.

BTW just placed the order fir the mill should be here this week.
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Old 11-14-2017, 02:35 AM   #25
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Quote:
Originally Posted by marvin_schwartz View Post
If they have a replacement M12 draw bar it would save making one up.
If you have to make one, rather than turn a 1 piece type I cheated a little and just used some 12mm bar, threaded one end M12, then silver soldered a brass hex I'd made on the other end for the bolt 'head'. Took maybe an hour start to finish and cost very little.
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Old 11-14-2017, 04:11 AM   #26
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An even quicker cheaper way is to cut a piece of M12 allthread and weld a coupling nut to the top. Done
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Old 11-14-2017, 05:27 AM   #27
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Unfortunately the draw bar for the BF20LV, at least the one I own, is not made like that, it is a bit difficult to describe so I have taken some pictures. Cheers, Peter
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20171114_151748[1].jpg   20171114_151807[1].jpg  
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Old 11-14-2017, 05:35 AM   #28
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wow that is a bit different

PS I had a look at what running a M12 die over the 1/2 WW thread, as some people have done.
Looks like it might work but only 2 to 3 threads of the old WW pitch are meaty enough to hold a decent M12. in every 7 or so threads.
Which means less that 1/3 if the resulting threads are doing the holding. Not something that I would recommend, even though it's not really holding anything much.
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Old 11-14-2017, 06:00 AM   #29
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Hey Marvin,
Running a 12mm die over a 1/2 WW thread is a bit butcherous but I'm quite capable of that. I did it over two years ago and like I said, I will make a new bar one day. I use my machine a lot and the bar is still going strong. A MT 3 taper does not need a lot of drawbar load to hold it in place. I use a battery impact screwdriver to do and undo the bar and I have never experienced ANY toolholding slippage or jamming of the taper. There is a lot I don't know about milling machines in general, but I know the BF20LV well and I can say with some confidence that you are not going to be disappointed with it. PM me at any time as I have modified my machine extensively and you may be interested. Cheers, Peter
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Old 11-14-2017, 08:16 AM   #30
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Thanks Peter, I agree, it's likely to work, but not likely to ever hold a 1/2 tool again. From what I see it's an easy job to make a new bar, so that'll keep me busy for a bit. Thanks for your offer to PM, I'll take you up on that some day I'm sure.


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