Cutting speeds and conditions


Find the right working conditions for Telcon tools

Milling Cutting Conditions
MaterialCutting  speed (m/min) for
PCD or CVD End-Mills
Cutting  speed (m/min) for
Carbide End-Mills
 Feed per tooth (mm) by Diameter
 2 – 3 4 – 5 6 – 8 8 – 10 10 – 12
CFRP Unidirectional150-200100 – 1500.015-0.020.02-0.0250.025-0.030.03-0.0350.035-0.04
CFRP Weave100-15070 – 1200.01-0.0150.015-0.020.02-0.0250.025-0.030.03-0.035
GFRP250 – 300150 – 2000.015-0.020.02-0.0250.025-0.030.03-0.0350.035-0.04
Aluminum-Si200 – 300120 – 1700.015-0.020.02-0.0250.025-0.030.03-0.0350.035-0.04
Copper200 – 300150 – 2000.015-0.020.02-0.0250.025-0.030.03-0.0350.035-0.04
Platinum, Paladium80-10050-700.01-0.0150.015-0.020.02-0.0250.025-0.030.03-0.035
SiC green stage***35-45NA0.01-0.0150.015-0.020.02-0.0250.025-0.030.03-0.035
Tungsten Carbide green stage50-60NA0.01-0.0150.015-0.020.02-0.0250.025-0.030.03-0.035
MMC: Al+SiC, Al+B2C40-50NA0.008-0.0120.012-0.0160.016-0.020.02-0.0250.025-0.03
CMC: SiC+SiC25-35NA0.008-0.0120.012-0.0160.016-0.020.02-0.0250.025-0.03
SiC, TC: Sintered15-20NA0.005-0.0080.006-0.010.01-0.0150.012-0.0180.015-0.02
Single Crystal Silicon20-25NA0.005-0.0080.006-0.010.01-0.0150.012-0.0180.015-0.02
* Conditions are for roughing (1xD depth of cut in Slotting or 0.5xD in side milling). For finishing, cutting speed can be increased up to 20% and feed can be adjusted according to desired surface finish and accuracy requirements.
** When part clamping on the jig is unstable, or tool extension is long, reduce RPM to avoid vibrations.       
***When machining low Silicon content Aluminum, cutting speed can be doubled.       
****For SiC and below materials, use PCD end mills only.       
MaterialCutting  speed (m/min)
for PCD or CVD drills
Cutting  speed (m/min)
for carbide drills
 Feed per
revolution (mm), by Diameter
 2 -3 4 – 5 6 – 7 7 -8 8 – 10
CFRP Unidirectional100 – 15070 – 1000.02-0.030.04-0.060.05-0.070.06-0.080.09-0.1
CFRP Bidirectional80 – 12060 – 800.01-0.020.015-0.0250.02-0.030.03-0.040.04-0.05
CFRP/Al *100-15070 – 1000.07-0.10.1-0.140.12-0.160.13-0.180.15-0.2
CFRP/Ti **NA50 – 700.02-0.030.04-0.060.05-0.070.06-0.080.09-0.1
GFRP200 – 300150 – 2500.03 – 0.040.05-0.070.06-0.080.08-0.10.1-0.15
Aluminum-Si200 – 300150 – 2500.07-0.10.1-0.140.12-0.160.13-0.180.15-0.2
Copper200 – 300150 – 2000.05-0.080.08-0.120.1-0.130.12-0.160.13-0.18
Platinum, Paladium80-10050-700.05-0.080.08-0.120.1-0.130.12-0.160.13-0.18
SiC green stage***35-45NA0.07-0.10.1-0.140.12-0.160.13-0.180.15-0.2
Tungsten Carbide green stage50-60NA0.07-0.10.1-0.140.12-0.160.13-0.180.15-0.2
MMC: Al+SiC, Al+B2C40-50NA0.01-0.020.015-0.0250.02-0.030.03-0.040.04-0.05
CMC: SiC+SiC25-35NA0.01-0.020.015-0.0250.02-0.030.03-0.040.04-0.05
SiC, TC Sintered15-20NA0.005-0.010.006-0.0120.008-0.0160.01-0.0180.012-0.02
Single Crystal Silicon20-25NA0.005-0.010.006-0.0120.008-0.0160.01-0.0180.012-0.02
If Aluminum is on exit, then on the Aluminum section only, pecking cycle of
If Titanium is on exit, then on the Titanium section only, pecking  cycle of 20%D
When part clamping on the jig is unstable, or tool extension is long, reduce
RPM to avoid vibrations.
materials SiC and below materials, use PCD drills only.
RPM = Cutting speed (m/min) x 1000/π x Diameter (mm)
RPM = Cutting speed (sfm) x 11.81/π x Diameter (inch)
Cutting Speed (m/min)=RPM x π x Diameter (mm)/1000
Cutting Speed (SFM)=RPM x π x Diameter (inch)/11.81
Table Feed (mm/min)=RPM x Feed per revolution(mm)
1 IPM =25.4 mm/min
1 SFM = 3.33 m/min

Telcon Diamond Ltd. is a world leading manufacturer of Diamond PCD and CVD cutting tools for the machining of composite materials: CFRP, GFRP, MMC, CMC and hard ceramics. TELCON produces a wide range of tools used by many of the world’s leaders in the field including Boeing, Airbus, Lockheed-Martin, Spirit, ATK, Embraer, Denel, ELBIT and IAI. Telcon’s tools include: PCD tipped Drills, CVD diamond drills, Carbide drills, PCD Countersinks, Carbide tipped Countersinks, PCD tipped End Mills and CVD diamond End Mills and Carbide End Mills.

TELCON possesses the most advanced Grinding, and EDM machines and state of the art Quality control equipment. TELCON’s vacuum brazing equipment is highly controlled to ensure repeatability and reproducibility of brazing operation. TELCON uses world class PCD and carbide grades and CVD coatings. In addition to tools manufacturing, Telcon operating reconditioning services for PCD and carbide tools.

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