Drill Query

Drill Query

This topic has 4 replies, 4 voices, and was last updated 30 November 2019 at 23:19 by peak4.

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30 November 2019 at 21:19 #439576
Alan Girvan
Participant
@alangirvan88520
Hi,

I picked up this drill (hope you can see the photos, if not they are in albums titled drill). at an auction and I cannot find anything like it on the internet. I would like to know what it is intended for. The chuck opens to 4mm which makes me think it could be for a watch, clock maker or laboratory, it is a very sturdy piece of kit. I removed some of the cap head screws and they are imperial threads. It has two speeds. The quill has about an inch three quarters up and down movement. Would anyone have any ideas?

Many thanks in advance for any info you may have, Alan.
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30 November 2019 at 21:19 #38544
Alan Girvan
Participant
@alangirvan88520
30 November 2019 at 21:27 #439579
Martin Connelly
Participant
@martinconnelly55370
Farnell sell electrical and electronic parts and tooling. This looks like a pcb drilling machine.

Martin C
30 November 2019 at 22:43 #439598
DMB
Participant
@dmb
For those who don't know, I believe PCB material is very abrasive and requires use of carbide drills.
30 November 2019 at 23:19 #439603
peak4
Participant
@peak4
Looks to me like it was intended as a PCB drill.
Also appears, like there are a couple of brush screws, there should be one either side. As such, it not a synchronous speed drill, so I'd expect a very high rpm, possibly in excess of 10,000 rpm.
Looks to be two speed, so maybe it's a simple 1/2 wave rectifier or something.
Have a look on ebay or similar for PCB carbide drill bits, normally offered in boxes of 10 in steps of 0.1mm
i.e. 1.1-2mm, or 2.1-3.0mm

I've bought cheap Chinese ones in stepped sizes and they seem to work fine.
Bill
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