33444Re: [mill_drill] Spectacular motor failure
- Jun 15, 2013Hi Craig,
Sorry to hear about the exploding cap.
Leeson does make a metric motor - check both the mounting and shaft diameter - sometimes they do not match-up.
Yes, I did replace my 1ph system with a US 3ph 56C mount motor - heads up - I made an adapter flange, spacers and a adapter/extension to connect the motor shaft to the system. What the heck, I have a Grizzly mill/drill and a lathe.... It works quite well, but most won't wish to go through that stuff.
OK and alternate - call Grizzly and maybe other folks selling the same series mill/drill and see what they have as a replacement 3ph motor. For instance, Grizzly has gearhead systems with 3ph motors - check the manuals and/or call their tech support - see if they can give you advice.
Also check eBay - I did find metric motors - sometimes folks want a bit of money and I'm...frugal. The system here uses eBay acquired materials and my labor...I'm still frugal.
Let all know what you find out.
--- On Fri, 6/14/13, svsequoia_pdx wrote:
> From: svsequoia_pdx
> Subject: [mill_drill] Spectacular motor failure
> To: firstname.lastname@example.org
> Date: Friday, June 14, 2013, 1:24 PM
> There I was, drilling a .109 hole in delrin, and
> BOOM! the magic smoke escaped from the junction box on my
> 2HP RF-45 clone mill-drill. The 150 uF start capacitor
> exploded, blowing the cover off the junction box. The
> tattered remains hung there, burning; it took me a few
> moments to get my act together, pull the plug and blow out
> the flames. Then I had to deal with the smoke
> detector(s), fire alarm company, etc. Picture here :
> Since the motor had been running for 30 seconds (but making
> a slightly different noise) the start capacitor should not
> have been carrying current. A quick check with a
> replacement cap and a clamp-on ammeter proved that the
> centrifugal switch was not releasing at speed.
> The motor is a Chinese YL90L-4, single phase 230V/60Hz, 1740
> rpm, 2 HP flange mount. Does anyone know of a US source for
> a replacement? The only one I can find is the 3 phase
> Leeson 192206.00 if I upgrade to VFO control. (I
> did this upgrade on my 10"
> Grizzly lath e and it works well. It's
> just the $500 or so needed to invest!) Has anyone done
> the 3 ph upgrade? Dop you know if the Leeson is a
> drop-in replacement?
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