Caterpillar Performance Handbook, January 2017, SEBD0351-47

Production

Motor Graders

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:

Operating Speeds:

Typical operating speeds by application

Finish Grading: Heavy Blading: Ditch Repair:

0-4 km/h (0-2.5 mph) 0-9 km/h (0-6 mph) 0-5 km/h (0-3 mph) 0-5 km/h (0-3 mph)

Ripping:

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.

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

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0°

Moldboard Angle

Edition 47 11-27