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4 Pcs long carbide burr set 1/4" shank, total length 6.1", head dia 8mm and 10mm, 1 slotted plastic box with hanger and 1 manual.
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 bending 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.
Perfect for tight and hard-to-reach areas than grinding discs grind wheel. Double cut produces a finer finish than single cut and reduces the size of the chips.
Long shank carbide burrs bits perfect for deburring smoothing grinding porting cast iron steel aluminum cylinder head engine intake exhaust manifold.
Very sharp, aggressive, tough, well-balanced and durable. 5 years returnless replacement.

Product Description

Sworker 4 Pcs Long Shank Carbide Burrs Shank Dia.=1/4", Head Dia.=8mm to 10mm, Total L. 147mm to 155mm, 1 Clamshell Plastic Box with Hook 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 6mm-rigid clamp system(collect and nut). Not be used for 1/4"(6.35mm) 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: 6mm 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.

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: Head Dia.8mm≤6000RPM, Head Dia.10mm≤4000RPM, Max application speed with contact to workpiece: Head Dia.8mm≤11000RPM, Head Dia.10mm≤9000RPM.