SYNDENT

Selection Guide

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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

Material of work- piece			RECOMMENDED ROTARY SPEEDr/min (Rotary speed = the below number x1000)
Material of work- piece			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
		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
	Hard non-ferrous metals	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

CARBIDE BURR SELECTION AND USE:

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

The second step in selecting the right tungsten carbide grade.

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