Instruction Manual

7
3. STIHL Harvester Saw Chain
3.1 Specifications
3.2 Technical Data
Physical properties
Operating properties
Saw Chain Rapid Harvester Micro Rapid Harvester Special
Marketing number 40 RMH (Type 3996) 40 RMHS (Type 3620)
Chain pitch .404" .404"
Drive link gauge 2.0 mm (0.080 in.) 2.0 mm (0.080 in.)
Depth gauge setting 1.5 mm (0.059 in.) 1.0 mm (0.039 in.)
Chain speed 40 m/s (131.23 ft./sec.) 40 m/s (131.23 ft./sec.)
Driving power (harvester head) 40 kW (54,38 bhp) 65 kW (87,17 bhp)
Sharpening angle 30° 30°
Side plate angle 75° 75°
Identification "H" stamped in area of depth gauge "HS" stamped in area of depth gauge
Rapid Harvester Micro (40 RMH) Rapid Harvester Special (40 RMHS)
Tensile strength 12000 N 15000 N
Kerf 8.9 mm (0.350 in.) 10.1 mm (0.398 in.)
Rapid Harvester Micro (40 RMH) Rapid Harvester Special (40 RMHS)
Guide bar oil flow rate
min.
max.
900 cm³/h (54.2 cu. in./hr.)
1800 cm³/h (109.8 cu. in./hr.)
1200 cm³/h (73.2 cu. in./hr.)
2400 cm³/h (146.5 cu. in./hr.)
Power
min.
max.
10 kW (13.4 bhp)
45 kW (60.4 bhp)
20 kW (26.8 bhp)
65 kW (87.2 bhp)
Guide bar feed load at center
min.
max.
recommended
100 N
700 N
600 N
250 N
1000 N
900 N
Saw chain speed
min.
max.
recommended
20 m/s (66 ft./sec.)
40 m/s (131 ft./sec.)
40 m/s (131 ft./sec.)
20 m/s (66 ft./sec.)
50 m/s (164 ft./sec.)
40 m/s (131 ft./sec.)