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Co1



Member Since: 19 Aug 2018
Location: North Yorkshire
Posts: 3671
United Kingdom 2013 Defender 90 Puma 2.2 HT Loire Blue
[Wanted] Single phase motor
Thought I’d see what people have kicking about in their sheds! Looking for a single phase motor with capacitor. C.1400rpm, .055 to 1 kw. Can be flexible on shaft size as I can bore out the pulley it will be paired with. Needs to be foot mounted, preferable b56 but can make something else work.

I’m restoring an old Fobco star drill and want to convert it for 3ph to single.

Anybody got anything?
Cheers
Col



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Post #1050297 30th Oct 2024 8:48pm
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blackwolf



Member Since: 03 Nov 2009
Location: South West England
Posts: 17361
United Kingdom 2007 Defender 110 Puma 2.4 DCPU Stornoway Grey
I imagine that you've considered and rejected the idea of using the existing motor with a VFD?

I recently changed my Bridgeport mill back to it's original 3ph motor with a VFD and wish I'd done it years ago.
Post #1050308 30th Oct 2024 11:10pm
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NickMc



Member Since: 01 Oct 2014
Location: Norn Iron
Posts: 1624
Northern Ireland 2006 Defender 90 Td5 HT Bonatti Grey
Yeah I’d go for a VFD as well.
Post #1050315 31st Oct 2024 1:10am
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Dinnu



Member Since: 24 Dec 2019
Location: Lija
Posts: 3414
Malta 2012 Defender 90 Puma 2.2 CSW Santorini Black
As above. Their prices are so good nowadays. 1988 90 Hard Top, 19J Diesel Turbo, Shire Blue - Restoration ongoing
2012 90 CSW, 2.2TDCI, Santorini Black
Post #1050318 31st Oct 2024 3:55am
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Co1



Member Since: 19 Aug 2018
Location: North Yorkshire
Posts: 3671
United Kingdom 2013 Defender 90 Puma 2.2 HT Loire Blue
I have been thinking about vfd, but I want to keep it as traditional as possible. I realise that is just nostalgic nonsense, but a 70 year old drill with electronic seems a bit wrong! Also, when I reduce the frequency it will also reduce torque which will be an issue in some applications.
Post #1050319 31st Oct 2024 6:52am
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blackwolf



Member Since: 03 Nov 2009
Location: South West England
Posts: 17361
United Kingdom 2007 Defender 110 Puma 2.4 DCPU Stornoway Grey
Co1 wrote:
... I want to keep it as traditional as possible ...


An excellent ambition but what could be more traditional than the original motor?

Using a VFD would mean that absolutely nothing on the drill needed to change, it would simply be connected to an external variable frequency three-phase supply. Perhaps the ultimate in "traditional" other than getting an old-school three-phase supply laid on to your workshop, and even that would mean that you wouldn't get the same degree of speed control.
Post #1050322 31st Oct 2024 8:24am
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Co1



Member Since: 19 Aug 2018
Location: North Yorkshire
Posts: 3671
United Kingdom 2013 Defender 90 Puma 2.2 HT Loire Blue
Touché Blackwolf, touché!
Post #1050361 31st Oct 2024 5:39pm
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julian



Member Since: 17 Feb 2017
Location: Devon
Posts: 99
United Kingdom 1994 Defender 110 300 Tdi CSW Alpine White
As above, if you want originality, feed it 3ph...

...from a vfd.

You don't need to do anything to the drill, just take it's 3ph plug off and fit a suitable vfd on the end of the wire.


Be aware that not all vfds are equal. Most motors will run on cheap simple units, but others need "boost" units etc depending on how they're set up.

Id imagine your drill will only need a small simple unit. The last one I bought was £40 off Amazon...
Post #1050377 31st Oct 2024 6:50pm
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Notyalc



Member Since: 27 Jul 2018
Location: Northumberland
Posts: 160
United Kingdom 2003 Defender 90 Td5 HT Epsom Green
This assumes the motor is dual voltage…
Post #1050386 31st Oct 2024 7:27pm
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julian



Member Since: 17 Feb 2017
Location: Devon
Posts: 99
United Kingdom 1994 Defender 110 300 Tdi CSW Alpine White
Quote:
This assumes the motor is dual voltage…


As stated, not all VFDs are equal.

"boost" units exist, theyre just a bit more money.
Post #1050393 31st Oct 2024 8:19pm
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Co1



Member Since: 19 Aug 2018
Location: North Yorkshire
Posts: 3671
United Kingdom 2013 Defender 90 Puma 2.2 HT Loire Blue
julian wrote:
As above, if you want originality, feed it 3ph...

...from a vfd.

You don't need to do anything to the drill, just take it's 3ph plug off and fit a suitable vfd on the end of the wire.


Be aware that not all vfds are equal. Most motors will run on cheap simple units, but others need "boost" units etc depending on how they're set up.

Id imagine your drill will only need a small simple unit. The last one I bought was £40 off Amazon...


I’d love a link to a £40 one of Amazon if you can?
Post #1050396 31st Oct 2024 9:03pm
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julian



Member Since: 17 Feb 2017
Location: Devon
Posts: 99
United Kingdom 1994 Defender 110 300 Tdi CSW Alpine White
I've just looked at my old invoice and it was £53 all in, not the 40 that I incorrectly stated (apologies) however that's not the current price.

This is the link -

https://www.amazon.co.uk/gp/aw/d/B07X11HTX...&psc=1

Amazon price goes up and down all the time - I suspect if you look through other sellers there may not be one as cheap as I got it, but there will be someone at an easier price.

This was for small motor that could not be run off a standard vfd (I needed the higher voltage output). I forget what I once knew about 3ph motors but if you can run the motor in the, umm, other configuration, you can (probably) use a non voltage increasing unit, and they're cheaper.

(This was for the feed motor on a wadkin bao/s)
Post #1050404 31st Oct 2024 9:35pm
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julian



Member Since: 17 Feb 2017
Location: Devon
Posts: 99
United Kingdom 1994 Defender 110 300 Tdi CSW Alpine White
This is an exceedingly similar unit for the same sort of price I paid -

https://www.amazon.co.uk/dp/B07TMZT6ZP/ref...V9kZXRhaWw

Again, 380v output if you need it, but only for small motors
Post #1050405 31st Oct 2024 9:46pm
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Co1



Member Since: 19 Aug 2018
Location: North Yorkshire
Posts: 3671
United Kingdom 2013 Defender 90 Puma 2.2 HT Loire Blue
Thanks Julian, much appreciated.
Post #1050432 1st Nov 2024 7:08am
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Co1



Member Since: 19 Aug 2018
Location: North Yorkshire
Posts: 3671
United Kingdom 2013 Defender 90 Puma 2.2 HT Loire Blue
Ordered, and got a return version for £40, and another 10% off!! What’s not to like!!
Post #1050433 1st Nov 2024 7:10am
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