Cutting speeds and conditions

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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 Revolution (mm) by Diameter
 2 – 3 4 – 5 6 – 8 8 – 10 10 – 12 12 – 16
CFRP Unidirectional150-200100 – 1500.1 – 0.150.15 – 0.20.18-0.230.2 – 0.30.25 – 0.350.3 – 0.4
CFRP Weave100-15070 – 1200.08 – 0.120.12 – 0.180.15 – 0.20.18 – 0.250.2 – 0.30.25 – 0.35
GFRP250 – 300150 – 2000.1-0.20.15-0.250.2 – 0.30.25 – 0.40.3 – 0.40.35 – 0.5
Aluminum-Si200 – 300120 – 1700.1 – 0.150.15 – 0.20.18-0.230.2 – 0.30.25 – 0.350.3 – 0.4
* Conditions are for roughing and semifinish. For finishing, reduce feed and speed according desired surface and accuracy requirements.
** When part clamping on the jig is unstable, reduce RPM to avoid vibrations.
***When machining low Silicon content Aluminum, cutting speed can be doubled.
Drilling Cutting Conditions
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
* If Aluminum is on exit, then on the Aluminum section only, pecking cycle of 1.5 – 2.0mm with dwell of 0.1mm ** If Titanium is on exit, then on the Titanium section only, pecking  cycle of 1.0 – 1.5mm  with dwell of 0.1mm ** When part clamping on the jig is unstable, reduce RPM to avoid vibrations.     
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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