What does a guy need to look for in spot weld cutters I've seen cheapie kits for 20 buck and others range up to 120 so whats the deal?

i like the blair rotobroach
use plenty of oil with them
and they will last along time.

Blair Rotabroach is a nice set up. Replacement cutters go for $8-$9 each, 5/16" and 3/8", 3 teeth. Buy extra locating pins too. Cut like a lathe but are brittle. I would get upwards of 1000 spots cut before it got dull (if I didnt break it first )
Been using the spotweld cutters from Harbor Freight lately. $3.99-$4.99 (depending on sale)Two sided cutter bit, also an "annular" (ring) cutter like the Blair. 8 teeth, not as brittle, will continue to work with a broken tooth or two. Maybe 200 cuts per side of cutter so upwards of 400 per unit.
Dont overheat either one or it wont last long. I use bacon fat for cutting lube

Reg old drill bits work best for me.
And I own all three different kinds of spot weld cutters and still use a reg drill bit.

It is best to use a low RPM, high torque drill to not dull the bit or overheat it. I use a Snap On 1/2 inch air drill that turns 800 RPM. My Blair bits last a long time. I also have used many Wurth 8mm bits that worked well.
Brad
Dorn Autocraft

I use combination of spotweld cutting bits from Snap-on,Mac and regular titanium coated bits,I like cutter "spot-eze" from Blue-Point

I am on my first body work project, doing the floor pans in my Challenger. I used the cheap $1.99 spot weld cutters for Harbor Freight. I bought several of them not knowing how long they would last, I got the whole pan out only using one. But I have no other practical experience to compare to others. I just chucked it in the dewalt drill and had at it. Seemed to work fine, but I am no expert.

Get the "Rotabroach" cutters made by BLAIR as recommended above , however get them from MAC TOOLS . They warranty any broken bits , holders , even the center punches! MAC also covers ALL my drill bits ( dull or broken!)

I did most of my car with the Harbor Freight cutters. For a lot less cash they did the same job for me as the Blair I used previously.

Are the HF cutters the same as the Eastwood cutters?? The eastwood worked well for me ( same design as the HF) I set my 2 speed drill in the slower "screwing" speed and used a little oil.. Worked great.. Don't get in a hurry or you will break off teeth...

An electric griner also works good,,,,you will see a blue ring when are thrugh the layer you plan to remove. I use this method for the most part,but the ones you can only get at with a drill I use a standard drill bit.

I have tried the harbor freight bits, but they wanted to walk off too much and I would often brake tips.

Started using regular drill bits and an air chisel. Be careful with the air chisel, you can do damage with it if you are not careful. I spent 2 hours drilling out welds in my floor and only got about 1/4 of the way done. I grabbed the air chisel and removed the rest of the floor pan in about 2 hours. Worked great, especially on the frame sections. Keep your chisel sharp.

You can see pictures on my website.

Daniel

I appreciate the feedback. I picked up some Motor Guard corp. magna products cutter and bits. Although they arent name brands they were actually the only ones i could find in town. Hopefully I'll have some time this weekend to try them out!

Let us know how those work for you.