20 Most Recent Diamond Products 01738 Core Bore Weka DK12 Drill Motor - Page 9 Questions & Answers

Measure from flat to flat for the size. Or just buy a very inexpensive alan wrench set.

Here is the manual for the charger - note on page 2 the meaning of the problem you describe - time to replace batteries (depends how old they are) http://download.sears.com/own/00925737e.pdf That being said, check the videos out, perhaps can get it to work after all for a while longer.

Sounds like a broken wire in the motor circuitry. I would take it apart and look for an obvious open in a wire. If nothing is seen then the most inexpensive fix would be to buy a new one.

either battery is charged or battery is bad. All chargers act different so I can't tell you. Try measuring the battery voltage with a meter. I assume you do not have another battery to try. If the voltage is about 40V then the device might be bad. If it is much less (discharged) then the charger might be bad. But the battery may also be bad. A high internal resistance on the battery might cause the charger to think the battery is charged because it isn't drawing much current

I can't even find the drill. I would go to aliexpress.com and search for a drill and batteries the matched as I suspect it is made in China (most things are)..

It must be a 12V Lead acid or gel battery. Therefore any 12V battery charger should work. It may be tricky to get it connected easily.

battery must be discharged. connect to charger and wait.

Plenty of help and advice online - link to results of a google search below... A micro drill press is the best tool to use with the stone held firmly in a vice and a Plasticine reservoir built around the drilling site for water to keep the drill bit cool... https://www.google.com/search?rlz=1C1CAFB_enGB673GB676&ei=7j9kXfXVB8_EwAKDmrKQCQ&q=best+drillbits+for+gemstones%3F&oq=best+drillbits+for+gemstones%3F&gs_l=psy-ab.12..33i10i160.5511.33680..39331...2.2..4.330.4719.8j23j2j2......0....1..gws-wiz.....10..0i71j35i304i39j35i39j0i131j0i67j0j0i131i67j0i20i263j0i10j0i22i10i30j0i22i30j0i8i13i30j0i13j0i13i30j33i22i10i29i30.JnlBV_Jv1OY&ved=0ahUKEwj1hP2Dr6HkAhVPIlAKHQONDJIQ4dUDCAo

Put some penetrating oil on the chuck and let it soak overnight, they should come loose.

More than likely a defective battery sinse the other ones charge fine..
Bring it back for exchange of another one..

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lube it then use 2 vice grips to loosen it up

is it a morse taper? if so lower the spindle and pry through a slot to remove the spindle. then identify if the chuck is held on with a bolt, threded or pressed in. if its a pressed fit here are chuck removal tools that look like wedges that remove the chuck from the rest of the spindle

try using a wire to connect the battery to charger it might be a loose connection . If it does not work battery or battery charger might not be faulty

yes just go to ebay you my grt one there

The battery is shorted.

Buy new battery for my battery

hi just go on to ebay you may get one there

I would try wiping it down with some Goo Gone and see if that helps.

If it is only a few weeks old, then return it under warranty. Do not open it as it will probably invalidate the warranty.