Do bi-metal relays wear out?

[mksj]

FYI, you can get a variable speed 3 phase 230VAC gear motor (1/15-1/6 Hp) for around $100, typically these have a speed range of 10-110Hs or similar. One below is 19 RPM, so should be good for around 5-35 RPM it has a 1/2" output shaft. There are also a ton of Oriental gear motors, but will have to deal with metric shaft sizes and chinglish instructions.

Leeson M1125282.00 1/15 Input HP 20 RPM 208-230VAC AC Gearmotor | eBay

This is a Leeson AC gearmotor. The input horsepower (HP) is 1/15 and the no load RPM is 20. Item AC Gearmotor. Gearmotor Phase 3. Gearmotor Shaft Type Single. Gearmotor Shaft Orientation Parallel. Gearmotor Rotation CW/CCW.

www.ebay.com

Lots of inexpensive VFDs, anywhere from $60-130, there are also some dumb types from KB Electronics (KBVF series, KBVF-21D, 22D, 23D) that I have used with no programming, just connect and set the jumpers and some trim pots.

220V 0.75KW Single Phase To 3/Three Phase Output Frequency Converter VFD VSD USA | eBay

Find many great new & used options and get the best deals for 220V 0.75KW Single Phase To 3/Three Phase Output Frequency Converter VFD VSD USA at the best online prices at eBay! Free shipping for many products!

www.ebay.com

Frequency Drive VFD Single to 3 Phase Speed Controller 1HP 220V 0.45kw | eBay

Find many great new & used options and get the best deals for Frequency Drive VFD Single to 3 Phase Speed Controller 1HP 220V 0.45kw at the best online prices at eBay! Free shipping for many products!

www.ebay.com

Teco-Westinghouse, L510-2P5-H1-N, 0.5 HP, Variable Frequency Drive 230 Volt, 1 Phase Input, IP20, a

Purchase Teco L510-2P5-H1-N .50 HP Variable Frequency Drive from Dealers Electric

dealerselectric.com

Electric Motor Whole sale

www.electricmotorwholesale.com

KB Electronics KBVF23D Industrial Control System for sale online | eBay

Find many great new & used options and get the best deals for KB Electronics KBVF23D Industrial Control System at the best online prices at eBay! Free shipping for many products!

www.ebay.com

 

[Bi11Hudson]

I've got a relay on my parts washer and it's just started tripping. Runs for about 3 minutes them trips, comes back on in about a minute and runs for a couple then trips again.

In a word, yes, but. . . The "relay" is actually an "overload" protection device. It is there to protect the electrical parts connected to it. While it can fail, it isn't very likely. Having read the posts, most of them are on point, but. . . The electrical world is overflowing with "buts", that's the nature of the field.

With small gear motors, many times there is one, or more, phenolic gear. That is the most likely source of trouble. Finding another will be a bear. Quite likely, the motor was damaged when it got into a "locked rotor" situation. it may be less expensive to just replace the motor. Something as simple as a microwave oven turntable motor would suit, if it could be waterproofed. There are many sources for such motors. But you will need to adapt the mounting. Three phase conversion is an option, but not recommended. It over-complicates the whole machine.