Drilling

Hydraulic Rotary Head

HB85 (475G)

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High-torque setting: Torque
84200 ft-lbs
High-torque MAX setting: Torque
84200 ft-lbs
High-torque setting: Speed
25 rpm
High-torque MAX setting: Speed
60 rpm
High-speed setting: Torque
42100 ft-lbs
High-speed MAX setting: Torque
42100 ft-lbs
High-speed setting: Speed
50 rpm
High-speed MAX setting: Speed
60 rpm
Maximum power
670 HP
Crowd force
132600 lbs
Extraction force
132600 lbs
Output shaft ID
3 in
Optional swivel joint ID
3 in
Weight with guides & swivel
3860 lbs
Weight 100' to 150' hydraulic hoses
1090 lbs
Height (H)
68 in
Width for leads
26 in
Depth - center to front (CF)
36 in
Depth - center to rear (CR)
20 in

Model 475G

Engine
Caterpillar C13
Emissions rating
EPA Flex
Power
475 HP
Operating speed
2100 rpm
Maximum motors pressure
5500 psi
Motors flow (no load)
140 gpm
Clamp pressure
4500 psi
Clamp flow
6 gpm
Weight (w/ full fluid & 1/2 fuel)
13750 lbs
Length
157 in
Width
64 in
Height
91 in
Hydraulic oil capacity
275 gal
Fuel Capacity
118 gal
  • Speeds shown are no-load speeds (free-hanging condition).
  • Speeds under actual drilling conditions (varying loads) may be 10-15% lower.
  • Maximum torque requires a power unit capable of 5,500 psi (380 bar).
  • Maximum speed requires a power unit capable of 300 gpm (1135 lpm).
  • Max power means cannot run at maximum torque and maximum speed at same time.