856 / 2440
11
Edition 47 11-27
Motor Graders
Production
PRODUCTION
The motor grader is used in a variety of applications in
a variety of industries. Therefore, there are many ways
to measure its operating capacity, or production. One
method expresses a motor grader’s production in relation
to the area covered by the moldboard.
Formula:
A = S
×
(L
e
−
L
o
)
×
1000
×
E (Metric)
A = S
×
(L
e
−
L
o
)
×
5280
×
E (English)
where A: Hourly operating area (m
2
/h or ft
2
/h)
S: Operating speed (km/h or mph)
L
e
: Effective blade length (m or ft)
L
o
: Width of overlap (m or ft)
E: Job efficiency
Operating Speeds:
Typical operating speeds by application
Finish Grading:
0-4 km/h (0-2.5 mph)
Heavy Blading:
0-9 km/h (0-6 mph)
Ditch Repair:
0-5 km/h (0-3 mph)
Ripping:
0-5 km/h (0-3 mph)
Road Maintenance:
5-16 km/h (3-9.5 mph)
Haul Road Maintenance: 5-16 km/h (3-9.5 mph)
Snow Plowing:
7-21 km/h (4-13 mph)
Snow Winging:
15-28 km/h (9-17 mph)
Effective Blade Length:
Since the moldboard is usually angled when moving
material, an effective blade length must be computed
to account for this angle. This is the actual width of mate-
rial swept by the moldboard.
NOTE:
Angles aremeasured as shown below. The effective
length becomes shorter as the angle increases.
Moldboard Angle
0°