Page 6 - CBN_2018

Grinding Vs. Hard Turning

An important advantage in using PCBN inserts
PCBN INSERTS grinding operations of hardened parts. Turning
is that they can replace the slow and expensive

with PCBN inserts significantly reduces the cost
per part when compared to grinding. ISCAR’s
global sales figures have shown that customers
are changing their finishing processes from
grinding to turning with PCBN inserts, particularly
in the global automotive industries.

Grinding Hard Turning

• Size tolerance specifications beyond • Size tolerance specifications beyond the
the capability of turning capability of turning
• Surface finish requirements too tight • Complex geometry that makes single-point
for hard turning turning more practical
• Relatively high metal removal rates
• Dry machining
• Faster machine setup
• Faster cycle times
• I.D. and O.D. machining on one machine

Surface Ra [μm] 1

PCBN
0.5
Grinding

0.1 0.2 0.3
Feed rate [mm/rev]

6 ISCAR