TM 5-2420-230-24-1
Spicer Speciality Axle Division - Technical Publications
OERLIKON N FORM GEARS
Typical preferred tooth contact
(pinion member left hand in all cases shown)
Fig.A
HEEL
TP25
TOE
Pinion
CONVEX SIDE
TOE
LOW CENTRAL HEEL
CONTACT
HEEL
Crownwheel
CONCAVE SIDE
HIGH CENTRAL
CONTACT
CONCAVE SIDE
CONVEX SIDE
HIGH CENTRAL HEEL
LOW CENTRAL
CONTACT
CONTACT
Fig. B
Fig. C
PROFILE ERROR
PROFILE ERROR
To correct; move pinion towards
To correct; move pinion away from
crownwheel in direction of arrow A.
crownwheel in direction of arrow A.
To maintain backlash, move
To maintain backlash, move
crownwheel away from pinion
crownwheel towards pinion
in direction of arrow B.
in direction of arrow B.
TP26
A
A
Error
Error
CONVEX SIDE
CONVEX SIDE
HIGH TOE
LOW HEEL
CONTACT
B
B
CONTACT
CONCAVE SIDE
CONCAVE SIDE
HIGH HEEL
LOW TOE
CONTACT
CONTACT
CONCAVE SIDE
CONVEX SIDE
CONCAVE SIDE
CONVEX SIDE
LOW TOE
LOW HEEL
HIGH HEEL
HIGH TOE
CONTACT
CONTACT
CONTACT
CONTACT
Manual No. 1785 Issue A
Page No.E17
Spicer Speciality Axle Division
J-127