Bench Grinders - Page 2 - Recent Questions, Troubleshooting & Support

Manual at the link, http://www.northerntool.com/images/downloads/manuals/152100.pdf

There is a left handed thread and a right handed thread on the arbors. Removal Right Hand Side (RH) Wrap a piece of rubber or leather around the threads on the LH side of the arbor & hold with pliers, while turning the RH nut CCW. Left Hand Side (LH) Wrap a piece of rubber or leather around the threads on the RH side of the arbor & hold with pliers, while turning the LH nut CW. Installation Note: Hand tighten the nut, then 1/4 turn. Right Hand Side (RH) Wrap a piece of rubber or leather around the threads on the LH side of the arbor & hold with pliers, while turning the RH nut CW. Left Hand Side (LH) Wrap a piece of rubber or leather around the threads on the RH side of the arbor & hold with pliers, while turning the LH nut CWW. For grinding stones:

• ring test the stone
• discard the stone if it has been dropped
• be sure the paper washers are installed on the wheel

GRINDER SAFETY 101 (graphic injury video so be warned) http://www.garagejournal.com/forum/showthread.php?t=263083

should be able to goggle it by model number.

Call Granger Parts ask for skidmatics

If the plug on the cord has 2 flat prongs and one round one then its 110 VAC single phase. If the motor has 4 wires then I'd suspect 3 phase. The data plate on the motor will tell you for sure.

try radio shack,or electronics store in your area

Go to;
http://www.searspartsdirect.com/partsdirect/getSubComp.pd?modelNumber=152.211521&productCategoryId=0721100&brandId=0247&modelName=GRINDER&diagramPageId=00001&documentId=P0410025&pop=flush


and click on "View full size" at the top.

depends on condition and what comes with it. generally starts at $500 in good shape and up to 850 if excellent with many extras (chucks, rests, knurling attach, faceplates, etc) Also, check for accuracy...

Yes all the tool places say discontinued. Yes, bypass it, but make sure you don't overwork the grinder. https://www.google.com/search?q=2610904741 ..

Out of warranty ... time for a replacement machine.I would choose a different make. Assuming the batery is not the fault.

DIRTY CONTACTS POSSIBLY

Size for size and component value identical on replacement. Fit the correct part.

Considering how potentially dangerous grinding machines and wheels are and how much safety legislation exists about their maintenance, adjustment and use, a great deal of printed matter exists about these things and the wide range and selection of wheel material. You should have no bother finding useful information, fortunately bench grinders are extremely similar to each other... https://images.homedepot-static.com/catalog/pdfimages/b6/b64b39fb-6d42-4fec-a274-76bbd950e6d8.pdf

Mmmm... that's a little more complicated. If you have a continuity / resistance meter, we can noodle it out, though. First, are the two white wires the ONLY wires coming from the motor? I suspect they are - that's not in conformance with any accepted color code, but it'll work. For the rest of this, I'll assume that the two white wires are the only ones from the motor. You'll need to meter the switch itself, with no wires connected to it. In the OFF position, you shouldn't find continuity between any of the four switch contacts. In the ON position, you should find continuity between two pairs of contacts. The black wire from the power cord should go to ONE of the two switch contacts in a pair that have continuity with the switch turned ON. One (either) of the white wires from the motor should go to the other switch contact IN THAT PAIR. That leaves you with one more pair that has continuity with the switch turned ON. The white wire from the power cord goes to one of those, and the second white wire from the motor goes to the other one. When you have it all wired up, plug it in & turn it on. If it's not right, it should immediately pop your circuit breaker. If it IS right, it should run fine. If it pops your circuit breaker, open it back up and swap one wire from the power cord and one wire from the motor.

Search using https://www.google.com or eBay.com Example of search result: http://www.1sourcecomponents.com/partinfo/Fa4-12/2bd%20trigger%20switch.htm

One turn.

Find a Single Pole Single Throw (spst) toggle switch at the local hardware store rated for the load of the grinder. Wire the switch in place and viola you are done! Machines are stupid;they can tell the difference between an oem part and a replacement.

You can get a replacement toggle switch at any hardware store look in the electrical department.

If you can't find the direct replacement check with Grainger or other industrial supply house ... https://www.grainger.com/category/push-pull-switches/automotive-electrical-and-lighting/fleet-and-vehicle-maintenance/ecatalog/N-15m5?okey=push-pull+switches&mkey=Push%2FPull+Switches+&refineSearchString=push-pull+switches&NLSCM=5&EndecaKeyword=push-pull+switches&searchRedirect=push-pull+switches&sst=subset&suggestConfigId=6&nls_boost_words=noContent