SJ-3 60° Countersink Premium Tungsten Carbide Burr

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Product Specification

SJ-3 60° COUNTERSINK PREMIUM TUNGSTEN CARBIDE BURR– ¼” shank

SJ-3 60 degree burrs are great for sharp angle areas, countersinking, counterboring and chamfering bores with a 60 degree angle. Due to the extreme hardness of this tungsten carbide, it can be used on much more demanding jobs than HSS (High-Speed Steel). These carbide burrs are made of tungsten carbide burr die grinder bits and will start to soften at higher temperatures, so carbide is always the best choice for long-term performance.

Double cut or Cross cut carbide burrs tend to be used on ferrous and non-ferrous metals, soft steel, and also for all non-metal materials such as stone, plastics, hard wood, and ceramic. Double cut burrs will leave a slightly smoother finish than single cut due to producing smaller chips as they cut away the material. Use for medium stock removal, deburring, finishing, and cleaning. A double-cut carbide burr is the most popular cut and will see you through most applications.

Quantity: 1 Piece

Dimensions:

• Head Shape – 60 degree countersink
• Head Diameter – 3/8”
• Length of Cut – 5/16”
• Shank Diameter – 1/4”
• Overall Length – 2-1/2”
• Cut – Double Cut
• Max RPM – 70,000, however it is uncommon to need more than 35,000 RPM.  Click here to see our recommended operating speeds by application and size.

Machines Used On:

• Die Grinders and hand-held pneumatic grinders

Application:

• Ferrous Materials – Cast Iron, Steel, Stainless, Steel, Titanium, Nickel, Wrought Iron
• Non-Ferrous Materials - Copper
• Other Materials – Fiberglass, Plastic, Hard Rubber, Wood, Stone
• Countersink burrs are ideal for beveling, counterboring, chamfering, and for getting into acute angled areas

Safety Tips & Techniques:

• Tool speed will be determined by the material you are using your burr on.  If you are experiencing chipping, you are most likely operating at too high of speed for the application.  Start with a slower speed and increase as you go along until you achieve the best results
• Apply light pressure and let the tool do the work.  Bearing down on the tool will result in reduced tool life and a dull burr.
• Always wear proper PPE to include (but not limited to) safety glasses, hearing protection, respirator, and hand protection.  Keep all guards in place on your machine.
  
• Avoid use on electric power drills; the slower speeds can result in chipping of your workpiece.