A Filing Machine with motor drive

A Filing Machine with motor drive

This topic has 5 replies, 4 voices, and was last updated 14 May 2017 at 15:55 by Mike E..

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14 May 2017 at 11:48 #298084
Bizibilder
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@bizibilder
I've just about finished making a "Harold Hall" filing machine. The drawings and article in MEW were followed pretty much to the letter. I have however motorised the device using a motor from a cheap drilling machine that has been lying around for a while. My first attempt at this used a 1" small pulley and 2.5" large pulley with a J section poly v belt (4 ribs) – this proved to be a bit "fast" and, whilst it did work there was quite a bit of vibration. I have now modded it to have a 3" large pulley and the whole thing is more sedate and controllable – it certainly shifts brass at quite a rate!
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14 May 2017 at 11:48 #18520
Bizibilder
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@bizibilder
14 May 2017 at 13:01 #298098
capnahab
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@capnahab
Looks tremendous. What are you using for files and is it restrictive for file size?.
14 May 2017 at 14:51 #298110
Bizibilder
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@bizibilder
It uses 4" files (with the tang cut off) – I can get these from Arc Euro in most shapes that I need. I'm using 2nd cut files that do seem to work – if a little slowly for roughing out. However if you cut out close to the line in the first place they are quick enough. The one shown in the machine is a 4" square file with its missing tang uppermost – ie it cuts on the downstroke. (It may not look it in the photos but the file is dead square to the table!)

Edited By Bizibilder on 14/05/2017 14:52:27

Edited By Bizibilder on 14/05/2017 14:52:52
14 May 2017 at 15:20 #298112
Ian S C
Participant
@iansc
I can't remember the ideal stroke rate for a filing machine, but I suspect that for steel it would be 100 per min, or a little less, brass could be near double that, too high speed will kill your files, remember they are carbon steel. The best is to have a variable speed motor.

Ian S C
14 May 2017 at 15:55 #298118
Mike E.
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@mikee-85511
If it's of any help, the stroke rates for an old industrial filing machine I have are 70, 110, 150, & 280 strokes per minute.
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