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Engineered for
MAXIMUM
MULTI-MASTER

Performance

Interchangeable Ball Nose Milling Heads

The MULTI-MASTER family offers a wide range MM H… ball nose heads are called “economy”,
of ball nose milling heads with various dimensions, but not due to lesser accuracy. On the contrary,
shapes and accuracy. The heads combined with high-precision MM HBR… and MM HRF… heads
shanks, extensions and reducers allow for assembly have very closed diameter tolerances (h7).
of numerous ball nose endmill cutters that meet The MULTI-MASTER milling heads feature the
the requirements of the die and mold maker. combination of negative rake angles near the head tip
with positive rake angles along the most part of the
There are two main types of ball nose heads: spheric cutting edge in MM HCR… heads, increased
Multi-flute MM EB… heads and 2 flute area of the spheric edge in bulb-type MM HBR…
“economy” MM H…heads (table below). heads and others. A tooth of the head is extremely
strong and successfully stands up against considerable
The cutting geometry of MM EB… heads is not different loading; which is important for rough profiling and
from the solid carbide ball nose cutters; however milling hardened steel. However, the helix angle of the
the heads usually have smaller cutting lengths. The heads is much less when compared with the solid
approach to finding cutting data for MM EB… heads carbide ball nose cutters and MM EB… heads.
is the same as the method for the solid cutters.

Ball Nose Heads of MULTI-MASTER Family
Cutting Edge Rake Number of Ø Head Ø, mm Main Milling
Head Face Flutes tol. Application
Spherical Cylindr. 6 8 10 12 16 20
MM HCR sintered h9 rough to finish
180° yes
MM HRF 2 h7 finish + milling
MM HBR ~240° no ground h7 hard steel
MM EB 180° yes 2; 4 e8 rough to finish

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