Aluma Cut - Also known as “aluminum cut” since this variation is the best carbide burr for aluminum. The wider grooves and the single cut flutes run cooler than the alternative and also create longer chips. These two properties are ideal for aluminum and other ferrous and soft metals that are prone to damage from heat and likely to load up on a burr, clogging the flutes.

A CNC mill calculates speeds and feeds or SFM based on the information the user enters. The type of CNC mill, the type of machine controller, and the age of the machine will affect the amount of information that can be input directly into the machine. Historically G-code was created externally from a CNC machine and then loaded onto the machine. Externally created G-code was authored either with a dedicated CAM software or with a plug-in embedded in the 3D parametric modeling software. The user would input the same CNC machine they want to create the part on (with the specific work holding fixture), the type of tooling (manufacture, part number etc.), and the specific material being machined. The software generates the speeds and feeds based on the part's geometry and all the inputted information. This creates the optimal speeds and feeds or SFM tailored to the exact part and CNC machine.

The different shapes of each rotary burr allows for each to provide their own specialized grinding applications. The shapes include:

Image

BHA carbide burrs are manufactured with premium tungsten carbide, enhanced using a silver bonding to provide high-speed cutting with unmatched durability to outlast the competition.

Double Cut - Double cut carbide burrs have criss-crossing flutes etched into them, similar to a double-cut metal hand file. Double cut burrs are capable of more aggressive grinding and material removal than aluma cuts. They are best used with harder metals, though they are still useful for other materials like wood, hard rubber, and plastic.

Each diameter has specific cutting speed recommended ranges and maximum cutting speeds to ensure they work optimally and to extend the life of the burr. For the recommended RPMs, please see our carbide burr speed chart.

Surface feet per minute (SFPM or SFM) is the combination of a physical quantity (surface speed) and an imperial and American customary unit (feet per minute or FPM). It is defined as the number of linear feet that a location on a rotating component travels in one minute.

Each burr shape also has different sized diameters for the burr bit head. Depending on the specific burr, the diameter ranges from 1/16” up to 2”.

. Please enter the desired qty for the material(s) you want to include in your promotion or Proceed Without Promotion and only your base materials will be added to the cart.

Carbide burrs are meant to be used with compatible sized die grinders, pencil grinders, rotary grinders, and Dremel rotary tools.

Image

One of the main issues with lower quality carbide burrs is vibration during use, due to lack of uniformity on the cutting head. To create a more reliable and vibration free product, the flutes of BHA carbide burrs are ground with 5-axis CNC machines which offer the highest level of consistency, eliminating vibration for the operator and providing unmatched cutting precision.

These calculations are based upon theoretical values and are only intended for planning purposes. Actual results will vary. No responsibility from Kennametal is assumed.

Note: The circumference unit is in inches and is dependent on if it’s a milling or turning operation. For milling operations, the circumference is of the cutter (tool in the spindle). For turning operations, the circumference is of the workpiece (the material in the chuck).

The two sizes of burr shanks are ⅛” and ¼”. The smaller burrs can be used for extra fine detailed work and for reaching into very narrow spaces. The larger burrs are capable of more aggressive material removal at a higher speed.

Carbide burrs are a rotary cutting attachment for high speed pneumatic tools and power tools used to remove materials from many different surface types. They are useful across multiple industries including automotive, aerospace, metalwork, woodwork, dentistry, windshield repair, welding, and jewelry making, to name a few.

Image

Tungsten carbide burrs are constructed by welding the head of the burr bit to a 1/4” or ⅛” shank. Traditionally, copper brazing attaches the bur head to the shank. That is a lower cost manufacturing option that often damages the cobalt in the burrs, causing micro cracks. Instead of this, BHA carbide burrs are upgraded to implement a special silver welding process that protects the burr during production and also benefits from a much higher welding strength.

Inches per minute (IPM) is a speed measurement of how many inches traveled in a minute, without regard to direction. In machining, it is primarily used as a feed rate (imperial units).

Tungsten carbide alone is one of the strongest alloys. This metal is just below a diamond on the Mohs hardness scale. What sets BHA rotary burrs apart from other options is the innovative silver weld that ensures a more durable product and a longer lasting bit.

The type of cut on these burs changes both the aggressiveness of the bits as well as the material it should be used on. The two different cuts of BHA burrs include: