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Sworker 1 Pc Long Shank Carbide Burrs Shank Dia.=1/4", Head Dia.=1/2", Head L.=1", Total L.=173mm, 1 Round Telescopic Plastic Tube and 1 Manual.
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" 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" 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(โฅ3000RPM). 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.
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: 3000RPM, Max application speed with contact to workpiece: 7000RPM.
Pat Thompson
Reviewed in the United States on February 26, 2025
There are multiple warnings on this tool to NOT use it at typical full unloaded die grinder speeds, or it'll instantly bend in half and try to murder you. Given how long the shank is, I guess this is probably 100% true, though it makes me wonder exactly how you're supposed to use it properly when you can never lift the tool off the surface without spinning down first. I'm really kicking myself for not splurging on the variable-speed die grinder now, since that would make this eminently safer to use.Anyway, I haven't gotten much use out of this because I can't figure out how to use it without potentially having it fly apart. It otherwise seems pretty decent and definitely cuts well when it's carefully kept against the workpiece. That might be a skill issue or it might be a tool issue, but all I can give is my viewpoint, so there it is.
Centropomus Robalito
Reviewed in the United States on February 26, 2025
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Adam Conrad
Reviewed in the United States on February 21, 2025
I prefer using a cordless electric grinder, and occasionally I'll come across a project that I need to break out the old air grinder to get to. This long burr gives me more reach to hit those tight areas, and I can get past obstacles I couldn't even bypass with the air grinder.The longer length does reduce the control slightly as a smaller move at the grinder results in a larger move at the head. The good news is it also reduces my applied torque, so it's harder for me to put too much pressure on the head.It cuts very well, and holds up to my abuse.Overall a great burr.Highly recommended.
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Reviewed in the United States on February 20, 2025
This long burr for the die grinder works good. Note that there's a speed limit on this burr of 7000 rpm (and even lower if not in contact with the work). Nonetheless, it seems capable of hogging out cast iron just fine at the lower speed. It has held up fine, too, even at the tip which seems to take the most abuse. I'm not expecting this to hold up as well as the big brands, but for the price, it does good work.
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