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71 votes

Does a 2100W angle grinder need an earth pin?

Your grinder is a Class-II Double Insulated appliance and therefore does not require a ground/earth connection. But even if you did decide to fit a 3-pin plug, what would you connect the 3rd pin to?...
brhans's user avatar
  • 6,836
32 votes
Accepted

Is this saw blade faulty?

The filling is melted aluminum that galled/melted and filled the gullet and is covering one of the Tungsten Carbide teeth. You can pull it off with a pliers. The negative rake angle of the blade is ...
Tyler Swenson's user avatar
25 votes

How do I get over my fear of using power tools?

Check with your park districts and your community colleges for information on their wood working classes. Many offer classes on hand and power tools. You could also check with some local carpenters ...
JACK's user avatar
  • 82.9k
25 votes

How can I sharpen oscillating tool blades?

As Leah Bolden from See Jane Drill shows, this is easily done using a tri square file. She shows her technique in this video. Basically, you use a triangular file to file new teeth. This even works ...
SQB's user avatar
  • 890
23 votes
Accepted

Why does my old table saw power switch cut both hot and neutral?

The technique is called double-switching. According to this article, on AC equipment the technique is used to avoid dangerous conditions when hot and neutral are reversed, as often happens with ...
jbeldock's user avatar
  • 511
20 votes

Does a 2100W angle grinder need an earth pin?

It is double insulated. Your prior one wasn't so its case had to be grounded. Look for the square in the square icon on the name plate of the device: You will not be any safer if you replace the ...
Dan D.'s user avatar
  • 1,360
18 votes

Is this saw blade faulty?

Yes the J shape is supposed to be there for expansion. If you look at a Diablo blade it has the J relief cuts at the edges and also d-shaped relief cuts within the body of the blade. The large tooth ...
Joe Fala's user avatar
  • 6,374
18 votes
Accepted

Is a reciprocating saw the right tool to saw 2cm/0.8" hardened steel?

For cutting locks, nothing beats an angle grinder. Good locks are all made with hardened steel that should be as hard as any metal cutting blade for a saw. The reciprocating saw will be able to make ...
JPhi1618's user avatar
  • 28k
18 votes

How do I get over my fear of using power tools?

Fear will lessen once you are familiar with the tools operation. To build familiarity… Read the instructions before using a new tool. Watch videos online to familiarise yourself with how the tool ...
handyman's user avatar
  • 3,323
17 votes

Best DIY all-rounder cutting tool for straight edges? Multi tool?

The problem with 'All-rounder' tools is that they are rarely actually very good at anything. Sure they'll let you cut a wavy line in tile, but how often will you be doing this? My advice would be to ...
SiHa's user avatar
  • 2,750
16 votes

How to repair the handle of a mitre saw

Find a way to clamp the handle back together, perhaps with a large woodworker’s clamp, so that the crack line is nearly invisible and the the switch is retained solidly where it belongs; this is key ...
MTA's user avatar
  • 11.5k
14 votes

Why does my old table saw power switch cut both hot and neutral?

Probable reason: they made ONE saw assembly and used a motor that could be configured as 110 or 220. For 220 you would break both lines, for 110 you don't need to, but there is nothing saying you can'...
JRaef's user avatar
  • 15k
14 votes

How can I sharpen oscillating tool blades?

Generally, those are disposable items. Could you sharpen it? I'm sure you could, but your results would probably be less than satisfactory. Getting enough of the teeth sharp enough to notice a ...
FreeMan's user avatar
  • 47.7k
13 votes

What's the safest type of power saw?

While I appreciate this isn't an answer to the question, I'd like to point out that power tool safety is as much a state of mind as anything. All saws (with the possible exception of the sawstop and ...
Aloysius Defenestrate's user avatar
13 votes
Accepted

okay to use fatter/longer extension cord than spec'd for power tools?

The issue here is voltage drop in the circuit supplying the saw. The saw's motor has an optimal voltage range, and will not run well if the voltage is too low. The voltage drops over the length of ...
batsplatsterson's user avatar
13 votes
Accepted

How to repair the handle of a mitre saw

With the possibility of the handle breaking and my hand slipping down into the path of a spinning blade, if it were mine, I'd search online for a factory replacement handle. (Yes, I know many tools ...
FreeMan's user avatar
  • 47.7k
11 votes
Accepted

Does Makita multi-tool DTM51 have a real Starlock mount

No Your multitool does not have a Starlock mount. But some Starlock blades are compatible nonetheless. Starlock Starlock has three types of blades: Starlock regular, Starlock Plus, and Starlock Max. ...
florisla's user avatar
  • 230
9 votes

How NOT to use a power drill. What are common mistakes that should be avoided?

Some other helpful hints (not from Heloise) 0) ALWAYS wear gloves and eye protection. (Note: if you're using one hand to hold down the material being drilled, a glove can reduce injury if the drill ...
Carl Witthoft's user avatar
9 votes

Can i use larger/smaller circular saw blades on my circular / plunge / table / miter saw?

Especially within the same size class of saws (eg. 8.5", 10", 12") you will find that machines sometimes have blades which differ in size up to 5 mm / 1/5" (12": 300–305 mm, 10": 250–254 mm). For the ...
maddrag0n's user avatar
  • 241
9 votes
Accepted

How to Lubricate a Hammer/Rotary Drill

Here's the relevant bit, which includes some liability tone: Your tool was properly lubricated before leaving the factory. In from two to six months, depending upon use, take or send your tool to ...
isherwood's user avatar
  • 142k
9 votes

Best DIY all-rounder cutting tool for straight edges? Multi tool?

I do not know what "multi-tool" you are referring to. Best DIY all-rounder cutting tool for straight edges? It depends on what you are cutting and how long the cut is. There is not one tool ...
Alaska Man's user avatar
  • 13.7k
9 votes
Accepted

What should I do if I overheated my drill motor and made it smoke?

This has happened to me before and in general the tool continues to work mostly fine. I suppose there might be a drop in power output but I’ve never really noticed it. I realized that slightly more ...
RibaldEddie's user avatar
  • 2,420
8 votes

How do I get over my fear of using power tools?

Get a lot of practice. To start, go buy (or dumpster-dive) some cheap plywood. Then cut it into little pieces and throw them away. Just burn the wood as practice cuts - don't try to "make" ...
aghast's user avatar
  • 1,816
8 votes
Accepted

What would cause a power tool like a paint sprayer to trip a GFCI circuit?

Start with: "What does a GFCI trip on?" A GFCI is looking for GF's, or Ground Faults. To be more precise, it is comparing current on the hot wire vs. current on the neutral wire. If those ...
Harper - Reinstate Monica's user avatar
8 votes

What do the 1/4 , 3/8, and 1/2 in the impact drivers mean?

There are impact wrenches, drivers, and combos. An Impact driver accepts the 6-sided (hex) end of many drill bits and screwdriver bits. Your picture is a converter to allow the driver (or any drill), ...
Alisha Pratt's user avatar
7 votes
Accepted

SDS drills with advertised chuck sizes

Looking at the Milwaukee web site the chuck capacity refers to the largest solid bit (hole diameter) the drill is capable of drilling. They are referring to using a solid bit not a hole saw. If you ...
mikes's user avatar
  • 11.4k
7 votes
Accepted

What do the diagnostic flash codes of Milwaukee tool battery packs mean?

Since there is no official documentation, we need to do a bit of reverse engineering. So it appears to me (from similarities with flash codes from cars in the 1990's) that the number of flashes will ...
tanius's user avatar
  • 233
7 votes

Alternatives to circular saw for cutting 2x6 wood?

Buy a handsaw like this 13-20 dollars. Will cut straight not fast and it will strengthen and tone your arm muscles.
Kris's user avatar
  • 4,555
7 votes

Removing router bit that is stuck with damaged shaft

While the other answer is correct in normal conditions - that is the purpose of the pin. I would use a bar that fits into the hole in that shaft and a properly fitting wrench as if it has been ...
Solar Mike's user avatar
  • 27.8k
7 votes

Powering battery powered tools from the power grid

No reasonably-sized and priced 20V PSU will be able to deliver the power that your 20V tools need. You are trying to design a corded tool that can last through a big job. The correct solution is to ...
jay613's user avatar
  • 41.9k

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