Spot Weld Cutter Set (2 Pack) + 2 Replacement Blades & Storage Case

This spot weld cutter Works as advertised. Makes clean easy cuts if used with a little care. It is important to make a deep dimple with a center punch. Also important to use a variable speed drill. I found that if you put the spring loaded center into the center punch dimple, let the spring loaded center rest in the dimple and start the drill slowly without the teeth making contact. Then very slowly add pressure to the drill until the teeth make contact. Once the cutter makes a shallow hole you can speed up the cutter. You have to be careful though because if you aren't paying attention you can rapidly cut right through both layers of metal. I also found that a few drops of oil into the cutter head recess makes a faster cut. I have drilled out about 40 spot welds so far and am still using the first cutter.

I tried a center punch but working on curved surfaces the saw walks all over because the tension of the spring isn't tight enough to hold the position in anything less than perfect situations without a hole. There is an adjustment for spring tension, but it wasn't enough for me. This made me have to drill small 3/32 holes. I cut well over 100 welds and used only one cutter. I could do better now because the teeth are really hard and hold an edge. I started by going too slow with too much force and used an 1/8 pilot so I broke teeth off one side of the cutter in about 20 welds... A cobalt 3/32 drilled pilot with a little more speed and a bit less force with plenty of oil and the teeth hold up. I used a Milwaukee Hole shooter 0-800 rpm with an excellent speed control, would guess I used 300 to 400 rpm and adjusted pressure based on feel, lighten up if it feels grabby but keep pressure to keep it cutting. It goes pretty fast.The saw cuts great and exceeds my high expectations, however, the centering pin is .095" in diameter, a 1/8 pilot allows the saw to wobble and will break the hardened teeth. So this requires a drilled hole of 3/32 or smaller. These small drill bits have a tendency to break easily.The centering method gets a 3 star and the saws get a 5 star. A tighter spring or center shaft that tapers up to fit tight on a common, 1/8 drill size and I would give it 5 stars. If I had good access on a flat panel maybe this wouldn't be as big a deal.It is difficult to market tools like these because if the teeth aren't "brittle" they aren't hard and won't hold an edge, so will go dull which = bad reviews. Hard teeth are going to be brittle and brittle won't take lots of abuse = undeserved bad reviews. I prefer using finesse with the brittle teeth because the edge remains sharp so cutting speed remains about the same over the course of the whole job.It is way better than a regular drill and will buy these again.

This is my first purchase of and my first attempt at using a spot weld cutter.It took a few attempts/trials to figure out the best technique to use this tool. I found that 1) Center punching a mark in the spot weld is not enough, the cutters center pin will slip out of the punch mark. Center punch the spot weld and then with a 1/8" drill bit drill into the panel about the depth of the panel thickness. This will provide a good area for the center pin. 2) I found a higher RPM drill speed with light pressure pushing the cutter into the panel to be best. Especially when you are getting the cutter started into the panel.I did not use any lubrication and have drilled out approximately 50 spot welds with one side of the blade and no broken center pins using the technique above. After 50 spot welds drilled out it does seem to be getting dull. I'll use lubrication with the next one to see if it will extend the blade life.

These seem just fine to me. I've cut through a few welds now, and they do the job. I've never used this type of tool before, and tried various ways to detaching old spot welds. I had seen the guys on TV car restoration shows use something like this, so I thought I would give it a try. You do have to be a little careful so you don't go too deep. And I suspect that I will soon break one of these. Obviously these cutters are not expected to last forever - that is why this comes with several replacement cutters.

Works great in conjunction with a solid spot weld bit that has the pilot tip on it. I use those bits to get the hole started and then seat the center, spring-loaded, pilot pin of this bit in that pilot “divot” to keep it centered otherwise the bit wants to jump all over the place. You NEED some way to keep these centered over the spot weld. The pilot pin will NOT do that job on its own. So either do as I have done or drill a small pilot hole slightly into the metal to center the bit. Once you get it centered and up to speed with some cutting oil, these work great.

I ordered these under the pretext that they were made in USA. The drill bits came in plastic container with emphasized printing MADE IN CHINA. The cutting bits were misaligned on the drill shaft. The threads on the shafts and cutting heads were covered in a black residue that I tried to clean away to see if the heads could be seated properly. One shaft accepted the cutting heads the second did not. I did not try to chase the threads on / in either of the shafts or the cutting heads. I do not tolerate poorly machined or dirty new tools like these. They should be ready to use and clean. I expect high quality machined tools for me to my work.I did not think about using them. I am returning them.

Cuts very good. I was able to get around 80 spot welds cut with one side of the cutter. Nice aggressive cut. Need to keep drill RPM low for best result and longer cutting teeth life. They are brittle so you must keep it as perpendicular to the surface as possible. If it catches, the teeth will break. It is a nice feature to have a cutting edge on the opposite end so you can take it off and flip it around to use. Fortunately they also send a couple replacement cutters because I did end up breaking teeth on them. Would be even better is there was more spring preload available on the needle. This would help to keep it centered in the spot weld. Highly advise that you center punch before trying to cut the spot weld