Kop-Flex Industrial Coupling Product Catalog - Form 8887E

Gear Spindles
Improved Contact Ground Gear (CGG) Tooth
SOLUTIONS FOR DISTORTION
Correct distortion by lapping
One method of correcting distortion is lapping. The
rubbing of the external tooth with the internal tooth
using an abrasive medium to “wear the parts in” or
remove the high spots. The difficulty here is the parts
are lapped in matched sets and are not corrected to
the initial pitch circle and tooth geometry.
The combination of all these factors results in more
uniform tooth loading and longer life. This CGG
process can be introduced to the gear sets of your
existing spindles. Increase the spindle torque capacity
and effectively increase gear set life with uniform tooth
loading.
The Contact Ground Gear Solution
The CGG process involves a unique tooth geometry
which is carburized, and then the flanks of the internal
straight tooth and the flanks of the external crowned
tooth are ground. This grinding corrects tooth and
profile distortion. The correction results in an AGMA
10-11 gear. It also provides a much improved tooth
surface finish 32 RMS.
Carburized Gearing
with blue contact check at 3°
20-40% gear teeth in contact
Contact Ground Gear (CGG)
with contact check at 3° 90-100% Gear Tooth in Contact
Excellent gear tooth flank finish
Lapped Gearing
with blue contact check at 3°
60-70% gear teeth in contact
Good finish, corrected for
carburizing distortion
KOP-FLEX-designed CGG carburized gear spindles, with internal and external tooth flank
ground, are currently operating in mills in North America.
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