Grinders - Page 3 - Recent Questions, Troubleshooting & Support

I cleaned all the wiring connectors etc and used a 4-way extension cord with an i/o switch and thermal/arc breaker surge protector thingy. I had a piece of thick cable with a molded three prong plug which I had removed from a dead paper shredder (I think??) and connected the ground to the case (previously not connected) the black to the black and white to the white. I taped the connections and plugged the test cable into the extension thingy with its switch off and plugged it into the wall outlet. Then, with the grinder switch on, I gingerly switched on the extension thingy and the grinder (sans all moving parts) ie just the motor case and spindle (held securely in the B&D workmate) and viola(!) it worked fine and built up to very fast. I switched off the grinder switch and the motor slowed, taking an age to come to rest.
Then, I fitted a grinding wheel on the left hand thread end, tightened everything and retested, using the grinder switch to start it and it spun really fast.
Soooo, I guess the secure ground is an essential feature of a capacitor induction motor. I checked some old furnace motors that were "maturing" in the basement and they had no capacitor but only 2 wires...
I am now trying to remember which parts came off last and put it all back together. I plan to test it each time I put a part back...just in case. I hate it when you fix something on the bench and when rebuilt, it won't work...don't ask about the electric starter on the snowblower..not a happy puppy!
Please, pretty please and then some, do tell me if my "fix" is wrong and I could risk all kinds of nastiness.
Thanks,
Jenni.

Jet 577102 is a bench grinder with 1HP motor. It has got guards on the grinding wheel. Dust vents and guard makes the grinder makes it an efficient grinder. 115 Volt is needed to run this high performance grinder.

WEN is a leading power tool manufacturer. They produce many kinds of power tools. This grinder is just another quality product from them. WEN 4276 bench grinder has got 2.1 ampere motors that can run in a 3450 RPM without load.

An adjustable centrifugal start relay and or capacitor problem. Nonsensical Bench Grinder Wiring Diagram Diagrams Switch Buffalo 6cb 6510...

Sometimes it could be like this contact by the centrifugal interrupter or the powerswitch or startcapacitor (only if its buzzing) an other kind of relay switch it should be simple to measure it .but to adjust it for time release can be ??.

Double that 100mf

To convert it its possible more expensive then buy an other grinder but there is some trick to connect in serial on the powercord a light bulb on a special choosen ability differs on the RPM or use a variable power resistor also in serial connection between on one of the 2 wires on the powercord.

When running a die grinder, it is important to follow some simple safety rules. Never wear loose jewelry while operating the grinder. Neck chains can easily become caught in the die grinder and cause strangulation. Safety goggles should also be worn at all times.

https://servicenet.dewalt.com/Parts/Search?searchedNumber=dw400&searchType=0

Replace capacitor

replace the start/run capacitor or repair the centrifugal stating device in the end of the unit

since this is a vague comment, I have to say that some small grinders just do not do well with blade sharpening. I have one that does the same thing when sharpening a blade. It is just too small, horsepower wise, to handle the job.

Maybe wrong color wires used connecting over the (capacitor)start winding giving a wrong rpm, or just only a worn stator coil.

OC3012F12SPCYL OIL CAP 12MFD/370VThats number the neccesary part for your grinder 12 mfd think about a fitting size of the capacitor and model if you will know for sure here is the information to get .http://www.baldor.com/brands/baldor-dodge/contact-us/contacthttps://www.baldorvip.com/servlet/productInfoPacket/1022W.pdf

Here a possible diagram

Hard to find the data The tool is having an centrifugal switch to an breakercontact on the armature on the startup-winding where the capacitor is on , so it should be oft a high capacitance try it to start with 20 mf is maybe high enough to start. you can possible go to less with the capacitance . size compare of the capacity range is difficult because the last years the size differs much and are less

Hold (or lock) the grinding wheel on the other side if loose or lock because the locking direction is the same direction and don,t forget to ringing (sound-check -like a tuning fork) the stone if you replace it with a new one The risk is small but safety first

The dresser wheel is applied strait onto the grinding wheel when you get ridges & valleys on the front of the grinding wheel to make it straight again.

A Drill what has no torque can have bad bearings but i think the drill Brand AND model = X X but it is very often an Li-ion battery tool that is only a 2 or maybe 3 years old but the armatures inside them most of them are coming made by the brand JOHNSON (not Makita) a very nice and very powerfull but also an cheap part and that armatures are far much cheaper then the most people are thinking that the batteries have not enough capacity thats an expensive methode thinking and thats in the most cases wrong sometimes .but 20 on 80 % its the battery sometimes if the tool is too long lasting and working with a bad armature then the batteries will be damaged very soon, if batteries are in short time empty and tool has no power ... If you think You have an Li ION Battery tool , like Milwaukee or Panasonic AND very IMPORTANT to know is if the tool is making a terrible piercing sound you can take the test you should see you can only buy a new carbon brushholder if the brushes where worn,.... but if you use the tool daily a 3 or 4 weeks long the brushes are having the same length again and its very bad for the most expensive parts of all .. the li-ion batteries that you maybe have bought and much people (the most ) are thinking that the batteries are having a bad capacity but that is not true ,An anchor and replaceable brush holder is much cheaper and are most (new) only selled in a combination together new Panasonic drawings and the tool sounds again real smooth and 2 or 3 years later then you can maybe again use your batteries for in use in a BRUSHLESS powertool. where only a switch internally should be cleaned with solvent or contact spray and with white grease relubricated . Much people think its a problem with the new brushless tools ,but i find out that i have 3 milwaukee brushless tools cleaned the switch and the batteryconnector and have checked the thickness of the contacts, because if the contacts are bad , its not easy to get separate new parts for this brushless models a separate connector for the batteries is not deliverable by the brushless tools by Milwaukee. only in Australie and also and even worser are the contacts on the Dewalt brushless tools have sometimes in a very early time bad contacts even holes on it on the battery + and - connectors on the brushless powertools. strange but often occurs it has also so much power that its like a welding tool between the contacts in the connectors you not can see, and the tools are to little for the jobs where the most people it for used, (the problem is the heat dissipation because of the power and the extent of the modern tools they are often abused , there where better tools can used with a powercord but they have for the torque look alike less power and are for the modern people to heavy to work with.

Or the armature in the motor has a problem its melting in the fieldmagnetcoils or one or both of the ballbearings are jammed.