Selection Guide

Selection Guide

CARBIDE BURR SELECTION AND USE:

The first step in selecting the proper burr is to pick the best shape and cut style.

  • Selection of shape and diameter should be based on the work piece, and the operation to be performed.
  • Burs have 13 basic shapes:

  • Burs come in 7 kinds of flute style as following.

    6 - Double Cut: Very efficient stock removal. Creates a small chip. Good finish. Excellent operator control.
    3 - Single Cut: General purpose fluting. Produces long chips.
    1 - Nonferrous: For nonferrous materials. Aggressive stock removal.
    3SP - SP Chip Breaker: Provides breakdown in chips. Better control.
    4 - Diamond Cut: For heat treated and tough alloy steels where control is important. Creates a powder-like chip. Excellent finish.
    2 - Coarse Cut: Provides large flute area for softer ferrous materials. Fast stock removal.
    5 -Fine Cut: For general use on hard materials requiring a fine finish.

  • Selection of cut would be based on the material, and finish required.
    Material   6   3   1   3SP   4   2   5
    Aluminum            
    Brass, Bronze Copper        
    Carbon Fiber          
    Fiberglass            
    Cast Iron        
    Plastics          
    Hard Rubber            
    Steel, 40-55 Rc    
    Steel, 55-60 Rc    
    Steel, Carbon        
    Steel, Nickel Chrome      
    Steel, Stainless      
    Steel, Weldments        
    Titanium        
    Zinc            


    The second step in selecting the right tungsten carbide grade.

    We have metric size and fractional size for industrial carbide burrs. Meanwhile, we have 3 kinds of different carbide grades named K30, K25, K20 for carbide burrs.
    Grade Cobalt HRA HRC Density 
    (ISO 3369)
    Transverse rupture strength (ISO 3327)
    K30 8% 89.3-89.5 74.3-74.6 14.8 2000
    K25 7% 89.5-90.5 74.6-77 14.9 2650
    K20 6% 90.1-91.5 76.2-78.4 14.7- 15 1800


    The third step in selecting the right rotary speed for SYNDENT carbide burr.

    These are general speed recommendations that may need to be adjusted for special application

    Swipe or scroll to see more information.
    Material of work-piece RECOMMENDED ROTARY SPEEDr/min (Rotary speed = the below number x1000)
    Dia 3mm Dia 6mm Dia 8mm Dia 10mm Dia 12mm Dia 16mm Dia 20mm Dia 25mm
    Steel, cast steel Non-
    hardened,non-
    heat treated steels
    Aggressive grinding 60000-
    95000
    32000-
    48000
    24000-
    36000
    19000-
    29000
    16000-
    24000
    12000-
    18000
    10000-
    14000
    8000-
    11000
    Fine grinding 48000-
    64000
    24000-
    32000
    18000-
    24000
    14000-
    19000
    12000-
    16000
    9000-
    12000
    7000-
    1000
    6000-
    8000
    Hard non-ferrous metals Aggressive grinding 27000-
    37000
    13000-
    19000
    10000-
    14000
    8000-
    11000
    7000-
    9000
    5000-
    7000
    4000-
    6000
    3000-
    4000
    Fine grinding 37000-
    48000
    19000-
    24000
    14000-
    18000
    11000-
    14000
    9000-
    12000
    7000-
    9000
    6000-
    7000
    4000-
    6000
    Stainless steel (INOX) Rust and acid-resistant steels Aggressive grinding 32000-
    48000
    16000-
    24000
    12000-
    18000
    10000-
    14000
    8000-
    12000
    6000-
    9000
    5000-
    7000
    4000-
    6000
    Fine grinding 37000-
    48000
    19000-
    24000
    14000-
    18000
    11000-
    14000
    9000-
    12000
    7000-
    9000
    6000-
    7000
    4000-
    6000
    Aggressive grinding 32000-
    48000
    16000-
    24000
    12000-
    18000
    10000-
    14000
    8000-
    12000
    6000-
    9000
    5000-
    7000
    4000-
    6000
    Fine grinding 37000-
    53000
    19000-
    27000
    14000-
    20000
    11000-
    16000
    9000-
    13000
    7000-
    11000
    6000-
    8000
    4000-
    6000
    Cast iron Grey cast iron, white cast iron Aggressive grinding 60000-
    95000
    32000-
    48000
    24000-
    36000
    19000-
    29000
    16000-
    24000
    12000-
    18000
    10000-
    14000
    8000-
    11000
    middle grinding 48000-
    64000
    24000-
    32000
    18000-
    24000
    14000-
    19000
    12000-
    16000
    9000-
    12000
    7000-
    1000
    6000-
    8000
    Fine grinding 53000-
    64000
    27000-
    32000
    20000-
    24000
    16000-
    19000
    13000-
    16000
    10000-
    12000
    8000-
    10000
    6000-
    8000

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