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Sworker 5 Pcs Long Shank Carbide Burrs, Shank Dia 1/4", Head Dia 10mm, Total Lenth 94mm to 110mm, 1 Clamshell Plastic Box with Hook and 1 Manual.
Notes: Bent Risk
The tungsten carbide burr bits must remain in contact with the workpiece as long as the tool is running or turning on or turning off moment. Failure to observe this procedure may result in burr shank bent and an increased injuries risk. If the continuous contact between the bits and the workpiece is not guaranteed, the max idling speeds should not be exceeded. Max idling speed without contact to workpiece: 5000RPM, Max application speed with contact to workpiece: 15000RPM.
1. In general, burrs are used counter-rotationally or with a swinging motion. Pass the tool rapidly and lightly over the workpiece in the direction of rotation to achieve fine finishes and chamfers.
2. Don't apply too much pressure on the rotary tool, multiple light passes are better than a single deep one. Let the speed do the work. Do not exceed the max idling and application speed.
3. Clamping more shank depth of the burrs bits, inserting the shank of bits to the bottom of clamping is optimal. If you have to clamp the less shank, please low the rotary tool rotation speed.
4. Use only 1/4"(6.35mm)-rigid clamp system(collect and nut). Not be used for 6mm collect and nut of rotary tools. 3-jaws-chuck drills are not optimal, the high-speed rotary tools are optimal.
5. Don't sink the carbide burr for more than 1/3 of its periphery. Recommendation for tools drives: 1/4 inch shank from 300W, for coarse cuts, 500W+ and short shank burrs are optimal.
6. Avoid impact loads, otherwise the parts teeth will break off, shank will bend. For soft materials, such as aluminum, use a lubricant to reduce debris clogging. Use water as lubricant for glass.
7. Avoid lifting the burr away from the workpiece when starting, operating and stopping the tool, if your rotary tool works at a high speed. Using a foot switch is an excellent solution.
8. Always wear ear, eye, face protection and safety gloves. Grip the rotary tool firmly with both hands and use a swinging motion to minimizes the risk of kickback or wobble or sudden movement.
R. Hyder
Reviewed in the United States on March 30, 2025
Love these things. I never knew what I was missing until I tried one that a friend had. These really make short work of course grinding/removing stock. You may want to finish it up with a fine grit grinding stone if the surface matters. But it you are just trying to remove stock, these things really get the job done fast.This set has several shapes to choose from which is also nice. I do tend to use the same one (squared off cylinder) more than the others. But it is nice to have those when I come across something where their shape is helpful.Seriously, I went from owning none of these to a couple of sets now. I have a couple different locations where I tend to work. So I keep a set at each place. Not going to be without.
halides
Reviewed in the United States on March 29, 2025
The most important thing to note is that these require a 1/4 in shank. They will not fit in a 1/8 shank. Most cutting tools or rotary tools offer both options. These were a lot thick then I expect which is a good thing. I did not have any issues with bending or breaking. Most people who have this issue push the bits too hard. The extra length is great when trying to reach a little tighter spaces. I often us a rotary tool when installing (or updating) holes in doors for the latch. Most bits are too short, but these were perfect.
Daniel S.
Reviewed in the United States on April 30, 2025
Idk how long these will last just yet but they will definitely move some material in a hurry. They are quite aggressive, balanced well, no wobble or vibration. I've had big names be not as good. The plastic carrier was crap tho!!
Miguel Gonzalez
Reviewed in the United States on April 26, 2025
The extra reach makes easier to get into the tight spots.Sharp and good quality.I have used them for many projects and they are still looking good and doing what I purchased them for.
Richard E.
Reviewed in the United States on April 25, 2025
I was concerned these would vibrate or chatter badly as I was trying to use them due to the length of the shaft but they work great! Sure, if you use too much pressure, it chatters a bit but it's plenty sharp to not need to press hard (you shouldn't with a 20k rpm device anyway). Amazin for getting into tight spaces!
John Panzavecchia
Reviewed in the United States on April 18, 2025
Great for porting my BMW cylinder head
Shane Ravenbane
Reviewed in the United States on April 17, 2025
Reviewing: 5Pcs Long Carbide Burr Set 1/4" Shank Total L 4.3" Die Grinder Bits Rotary Rasp Attachment Cut Port Grind Metal Cast Iron Steel Aluminum Cylinder Head Engine Intake Exhaust Manifold Tight AreaSo far, these burrs have held up well while shaping low carbon steel, even when removing fairly substantial areas. I always use a cutting lubricant on burrs (and most other metal cutting/shaping tools), and it extends their life expectancy exponentially.
mama_of_2
Reviewed in the United States on April 15, 2025
This is a good quality set of carbide burrs. I am using them for porting aluminum and cast-iron cylinder heads, and they work just fine. I picked this set up due to the extra length and because it came in a set of five different shapes to allow me to cut different contours. If using on aluminum, you will need to spray the bits with a penetrating oil to keep the aluminum from sticking in the burrs. Unlike many other items of this nature, the instructions for use were included to prevent damage to the burrs and for safety. Comes in a handy plastic case for storage, but it's not the most durable, so will need to be careful with it.
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