delta 46-700 motor

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Forum topic by txn posted 01-08-2019 01:42 PM 624 views 0 times favorited 4 replies Add to Favorites Watch
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147 posts in 2424 days

01-08-2019 01:42 PM

i recently picked up a delta 46-700 for stupid cheap and am in the process of revamping it, it worked but made a lot of noise and I had to initially spin the chuck to get it going. Yesterday I took apart the entire motor and cleaned out 6 dirt dobber nests from inside the motor, reassembled it and it still works, but if the lathe speed is turned all the way down I still have to spin the headstock to get it moving. I also noticed that the motor was pretty warm for only running for a minute or so with no load on it, was wondering if anyone knows if it could possibly be the capacitor, and if so which one is a replacement. I pulled the cap out but the markings were worn off of it. Thanks.

4 replies so far

View Wildwood's profile


2932 posts in 3099 days

#1 posted 01-08-2019 08:08 PM

Might take it to electric motor shop and let them tell you what’s wrong! If just the capacitor they can you the right one for that motor.

-- Bill

View MrUnix's profile


8348 posts in 3164 days

#2 posted 01-08-2019 08:16 PM

Parts diagram doesn’t show a capacitor, so it’s kind of hard to cross reference :) (edit: see below)

But it’s easy enough to test just to make sure that is it. All you need is a multimeter (in resistance mode). It could also be the centrifugal switch, which would be the next thing to check if the capacitor is good. Noise could also indicate bearings. However, given the unknown nature of their condition or history, they should be replaced anyway – even if you think they are good. Cheap insurance.

Edit: According to this thread, My Delta Midi loses power , it’s a 30uf capacitor.


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

View txn's profile


147 posts in 2424 days

#3 posted 01-11-2019 01:44 PM

mine is not the midi, I saw that thread and the dimensions he gave for his cap were way off, I ended up just taking it to a repair shop so it can be gone thru and fixed right.

View steve104c's profile


52 posts in 2203 days

#4 posted 01-13-2019 10:03 PM

Some motors have a start capacitor and a run capacitor. Sounds like a start capacitor.Steve.

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