Page 19 - Centerdrill Produktkatalog 2020 English

M8 - 7.3 Surface without collar

Centerdrill 7.3 long Centerdrill 7.3 short-flat Centerdrill 7.3 long-flat

Order no.: 3650730 Order no.: 3550730
Product discription: 7.3 short-flat Product discription: 7.3 long-flat

Thread type: DIN ISO 13 / DIN 371 Thread type: DIN ISO 13 / DIN 371
Thread size: M8x1,25 Thread size: M8x1,25
Centerdrill core hole: 7,3mm Centerdrill core hole: 7,3mm

Working part L1: 14,0mm Working part L1: 18,20mm
Shank-ø: 8,0mm h6 Shank-ø: 8,0mmh6

Surface workpiece: flat / plan, without collar Surface workpiece: flat / plan, without collar
Max. Material thickness: 2,0mm Max. Material thickness: 4,5mm
Suitable for materials: Steel, Brass, Suitable for materials: Steel, Brass,

Aluminum, Copper Aluminum, Copper

Also available in the Beginner Set on page 56-59

Reference values for M8 in 1-2mm Material thickness

Material

Process data Stainless steel Steel Copper Brass Aluminum
RPM Centerdrill 1800 2100 3200 3200 3200

RPM Centertap 190-240 600-650 650-800 650-800 650-800

kW-Power + 2,0 1,5 1,5 1,5 1,5
Feed rate (mm/min)* + 50-150 50-150 50-150 50-150 50-150

• *While removing the collar, the feed rate should be increased at the end of the process, approx. 900 mm/min.
• These are recommended values and they may vary significantly, depending on the type of material, material
thickness, lubrication, etc. For thread forming, we recommend our cutting oil. If you use an emulsion, it should contain
at least 8-10% grease.
• CNC-data can be provided on request.

19