I have a lathe with a 1/3 HP 6.6 A split phase motor 1725 RPM It has pulleys so is a pain to change speed. Will this work to slow it down?
372304
These units are designed like a range hood speed controller full voltage is to start the motor, thenspeed is reduced as the contol knob is turned and the voltage is reduced, slowing an AC Motor.
372305
I don't think so. I believe your motor is an AC only motor which wouldn't be compatible with this speed controller designed for an AC/DC brush motor
372306
The only one I know about was an easy solid state construction project way back in the '90s. It had only a handful of components, including a triac, a silicone controlled rectifier (SCR), a potentiometer (variable resistor) and about 6 resistors and capacitors. It was in a book of simple electronic projects. I built it in an hour (once I had the parts). Unfortunately, I lent it to someone who tried to use it with a 5HP elevator motor. That slagged it. The other responder to your original question is WRONG. Any speed controller that reduced voltage, also reduces available torque. That'll work for a fan because the load is small & balanced. That isn't very desirable in a lathe motor as it will stall the machine if anything but the smallest cuts are attempted. The solid state controllers such as the one sold by Amazon interrupts the AC waveform to a greater or lesser extent, thereby allowing full torque at any speed (& smooth operation at even slow speeds). I'd Google "solid state AC motor speed controller", sift the hits for any mention of "DC" - which would rule it out for your application. Check out what's left for your motor (check with the seller as you did with Amazon). BTW, the reason your lathe has gears (or pulleys) to regulate speed is because, until Triacs, there was no other way to slow an AC motor & retain necessary torque. Good luck.
1844100
This fan comes with two-speeds, as for adding a rheostat, I am not sure if it would burn out the motor. The Hi-Low speeds seem to work fine.
1613692
The MLCS 9400 is designed to reduce the speed of any A.C. motor without harm and it works fairly well. If you want really precise control, buy a real variable transformer, like a Variac, which works great, but they cost more.
1327051
Yes, you change speed by changing which groove on the pulleys that the belt runs in.
672161
Looking at the drawings (and that it was made by MTD) it looks like it will work... just make sure you order the correct part.... two of the spindles are the same part number with only one pulley... the third spindle is a different part number with two pulleys... get the one you need...
1216386
What about tightening the bolt between pulleys 3 and 8 to keep them from twisting? I'm just thinking out loud here. I Use my machine almost daily and I really like it.
2059084
No this is not speed controllable, most single phase motors are not speed controllable as they have an internal start switch that is governed by the motor speed, so you can't slow it down or you will burn it up.
2219795
I use mine on a 1/3 HP electric motor to hold a wooden pulley that turns a 1X42 inch sanding/grinding belt to sharpen tools with. It works great. I think your question has been answered by others here already. Good luck.
2132081
The RPM doesn't matter because it is a piece of crap. Don't buy it. You can't modify the speed, but most importantly it has absolutely NO torque. You can literally hold the arbor with your fingers to stop it from spinning.
509272
1725 revolutions per minute then it would depend upon the sizes of wheels to which the motor is attached or drive through a gear or pulley ratio
2059086
Yes. Get a variable potentiometer, a dial equipped piece of equipment that will vary the voltage so you can slow the motor to whatever speed you want.
877782
I too thought that the gearbox was broken. Turns out the gearbox speed change mechanism sometimes wouldn't engage fully whether pushing or pulling. Make the belts are aligned and the clutch knob is secure first. I found that if I spun the blade pulley slowly by hand while firmly engaging the clutch knob the internal gears would engage and viola! I now had the new speed. In time the gears should wear-in enough that speed changing will become much easier. I also make sure that power is disconnected from the saw before I grab the pulleys. Don't want to damage or lose any fingers.-Bud,
39225
One speed, but if it was variable I'm not sure how that would work. That would be like a variable speed chain saw. Why would I want it to go slower?
2070842
it might go that slow but it won't have any power and probably stop turning when you start working on your project, don't get me wrong i love it but you don't get much power until the higher rpm.
1397454
a rheostat is not compatible with a 2 speed motor. The motor will over heat and short out. You need a single pole, double throw switch.
20751
To reverse the motor you need to change the wiring. It is easy. Have not thought of using a switch to do it but I guess it can be done. With regard to the speed of the motor I only use it on one speed. Not sure if you can put an in line box (reastat?) to allow for a variable speed motor. The motor works great. I use it to power a sander in my woodworking shop.
202918
It depends on how fast you want it to pull. The basic equation is energy in = energy out minus efficiencies. I would expect this motor to be able to pull at least 100 lb. laterally at with an RPM of around 1200RPM or thereabouts.