SD-1 Tungsten Carbide Burr Ball Shape Double Cut Rotary Burrs File, Used for metalwork, Tool Making, Engineering, Grinding by LU&MN

13 reviews for SD-1 Tungsten Carbide Burr Ball Shape Double Cut Rotary Burrs File, Used for metalwork, Tool Making, Engineering, Grinding by LU&MN

1. 

   Devin Rowe – October 17, 2025

   Buy it Now
   buy it.

2. 

   Reb M – October 17, 2025

   Does not grind bolt material well.
   I was trying to grind a bolt that broke off in the engine and it would barely grind any of the material. I ended up picking something at harbor fright which worked perfectly. For any body interested in what I used it’s WARRIOR Diamond Point Rotary Bit Set, 20-Piece.

3. 

   Dj k. – October 17, 2025

   Buy it
   This thing is two thumbs up it’s durable as heck. It grinds the metal down. The size is perfect for smaller objects. The value for the money is beautiful because it last I’ve been using this thing for three months and Boy let me tell you it’s still as sharp as it was the first day I took it out of the box. I recommend this to anyone in the automotive world or Metal working world.

4. 

   Doc sav – October 17, 2025

   Great for Metal Shaping
   I got this for an experimental project I am doing with metal sculpture. This bit has been great for cleaning up ragged edges and contour shaping. I don’t have a lot of experience to compare it to, but I have had no complaints.

5. 

   Hic Svnt Dracones – October 17, 2025

   Excellent sharp burr that cuts through all kind of materials.
   I was instantly impressed with this burr bit. It’s heavy, sharp, and clearly well-made. I’ve been able to shave down plastic and aluminium just by hand, and I tend to reach for it when I need to strip layers off of material by hand, such as stripping enamel off thicker copper magnet wire. When used in my CNC, it cuts through material effortlessly—like butter. I haven’t tested it on metal yet, but after several hours of use on polycarbonate and oak, there’s no sign of dulling or wear. It’s still just as sharp as when I first got it.

6. 

   AGB – October 17, 2025

   Good burr bit
   Needed to enlarge an existing hole inside of a cabinet. Not much room to work in but this bit did the trick. Had to adjust it back and forth to get the most out of the grinding but it worked well and opened the hole just right. Glad to have it in my tool box.

7. 

   Eric S. – October 17, 2025

   This is not solid carbide!
   This is not carbide first is extremely light compact to other carbide bits the same size second you can easily scratch the shank with a regular knife very disappointed.

8. 

   Shane Ravenbane – October 17, 2025

   Preliminary Review 04-29-25
   Reviewing: SH-1 Flame Shape Tungsten Carbide Rotary Burr for Metalworking,1pcThis is a nice carbide burr. So far (used with cutting oil) it’s held up well for the handful of times I’ve used it.

9. 

   Renegade – October 17, 2025

   I was unsure if I damaged the tip or not. I started with it by trying to put a small dimple in a piece of angle iron. It didn’t seem to cut very well. I tried the same on some wood, but it didn’t cut like I would’ve expected it to. My bad there.The issue was simply speed. I’d used a lower speed when I should’ve used a higher speed.The sides/body of the burr are very sharp, cut quite well, and cut very fast.After drilling a small pilot hole in some sheet metal, the tip of the burr struggled at low speed, but once past the first mm or so it began cutting very fast.Starting with a higher speed the tip cut much better through the same sheet metal. But there’s a significant speed difference between the cutting speed of the tip and the body. The tip blades are simply much shallower, so cutting is slower. This affords better control for shallow divot cuts. However, once past the first mm or so, the cutting speed is crazy fast in comparison.For thicker steel/material, the tip is the limiting speed factor, but once it’s cleared the other side, it goes fast. A pilot hole can eliminate that tip speed limit.Cutting sideways, the body is very sharp and cuts very fast. The burr is strong, and can withstand some punishment when doing so.Put another way, it’s not great as a “drill bit” unless you’re using a pilot. For drilling detents or divots, the tip is slow, but that also affords more control. It’s best used at higher speeds.

10. 

    User – October 17, 2025

    I use this with a cordless drill and it works well to ever so slightly enlarge a hole drilled in metal, when a snug fit is needed and I can’t risk making the hole too large with the next size drill bit. It’s nice and sharp, maybe not quite as sharp as some others I’ve had, but I prefer it not be too aggressive and get ahead of me anyway. It has lasted through quite a few tasks already without slowing down, so it definitely seems durable. If it handles metal this well, I have no doubt it will work well with wood too, tho I haven’t had a need to try it with that just yet.A useful addition to your tool box.

11. 

    Puddytat62 – October 17, 2025

    Solidly built and certainly strong enough to be put into a drill if you desire, or of course, into a Dremel or die grinder. The shaft is thick enough to be used for heavy duty grinding, but the size of the grinder really suggest light duty or fine detail work. It’s hard to determine whether the burr grinder carbide tips will last a long time so I would tend to be careful with these and perhaps use some sort of lubricant or coolant to make sure this lasts a long time. It comes packaged nicely and seems well-made, including a slight film to prevent the metal from resting.

12. 

    Yannick – October 17, 2025

    This carbide burr absolutely deserves its 5-star rating. It’s extremely sharp and shows no signs of wear, even after several minutes of intensive steel filing. I used it to shape the inside of a metal part and it performed flawlessly.

13. 

    Antrell – October 17, 2025

    This is a 1/4″ tungsten carbide milling bit that is normally used in a CNC machine fur cutting and deburring metal parts. It could also be used on some hard spieces of wood, however its flutes are too shallow to evacuate wood chips efficiently. It is more appropriate for operations that require grinding action.The bit has been manufactured in a shape of an end mill, but unlike the end mill, this bit will only cut sideways. It has 16 flutes with cutting depth of up to 5/8″ (16 mm). The total length of this bit is 62.0 mm or 2-7/16″. The shank is marked with “LU&MA SA-1”, no mention of diameter or material there. This bit is about twice the price asked for some of the similar burr bits. No idea if it is so much better than those, but perhaps worth the try anyway. I will be using it on my next project.