record CL1 lathe would not start

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Forum topic by rilanda posted 02-18-2015 08:11 AM 979 views 0 times favorited 2 replies Add to Favorites Watch
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171 posts in 2180 days

02-18-2015 08:11 AM

The Record CL1 lathe is powered by a 1/2HP Brooks Compton capacitor start motor which refused to start. My first reaction was to suspect the capacitor, I have no means of testing the capacitor so I contacted Record and ordered a new capacitor which they had in stock and agreed to take back should it not be needed . Five days later the new capacitor arrived and after isolating the motor from the electricity supply I removed the old capacitor and installed the new one without any effect, the motor still would not run. It was then time to investigate and look beyond the capacitor.
After making sure the motor was isolated I removed the motor and stripped it down to gain access and investigated the centrifugal switch that lies within the motor. After I had thoroughly cleaned out the motor with compressed air I discovered that the contacts on the centrifugal switch that should be closed when the motor is at rest to allow the current to be directed to the capacitor and provide the starting energy for the motor were not making any contact either because of dirt or wear. I cleaned the contacts with fine emery cloth, reassembled the motor after cleaning and lubricating the mechanical parts of the centrifugal switch to make certain it was not a mechanical problem i.e. broken springs, general long term wear (the motor is dated 1998) or a sticking movement I reassembled, refitted and reconnected the motor and BINGO it is running again. Makes me wonder just how many capacitor start motors are scrapped for this simple to rectify fault. The whole process took a little over 30 minutes to complete which I should have done before suspecting the capacitor. Record were true to there word and accepted the capacitor back, my only loss was postage both ways and 5 days without my lathe running.

-- Bill, Nottingham. Remember its not waiting for the storm to end, but learning to dance in the rain that counts. If you dont make mistakes, you make nothing at all.

2 replies so far

View MrUnix's profile


6766 posts in 2225 days

#1 posted 02-18-2015 08:53 AM

Welcome to the wonderful world of motor rehab! Glad you got it working. In the future, you can easily test a capacitor with a multimeter.. run down to HF and pick up one of those cheap $3 ones or wait for one of their ‘free with purchase’ coupons. . Analog meters are actually a little easier to test with, but they are getting harder to find these days.

Oh, and I’d consider a 1998 motor pretty much new :) I have motors from the 30’s and 40’s that are still chugging along just fine with no signs of giving up any time soon!


-- Brad in FL - In Dog I trust... everything else is questionable

View Woodknack's profile


11792 posts in 2406 days

#2 posted 02-21-2015 08:03 AM

I don’t think they have Harbor Freight in England.

-- Rick M,

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