Permanent Magnetic Motor Driveheads
The Permanent Magnetic Motor (PMM) series of direct drives offer the highest level of energy efficiency. The M-75 PMM is designed for medium- to high-horsepower applications, while the M-105 PMM is designed for high-horsepower applications.
Permanent Magnetic Motor Driveheads Style Specifications
| M-75 PMM | M-105 PMM |
Drive type | Direct | Direct |
Shaft type | Hollow | Hollow |
Drive style | Bearing | Bearing |
Input style | Vertical | Vertical |
Drive ratio | 1:1 | 1:1 |
Backspin control | Integrated resistive braking through VFD | Integrated resistive braking through VFD |
Permanent Magnetic Motor Driveheads Ratings Specifications
*Ca90 load rating is for 90 million revolutions. Reducing load one-half increases life 10 times. Reducing RPM by one-half doubles hours of life.**Efficiency and RPM/torque are typically derated at higher temperatures.
| M-75 PMM | M-105 PMM |
Max. output torque | 750 ft-lbs (1,017 Nm) | 1,000 ft-lbs (1,355 Nm) |
Speed range | 30 to 450 RPM | 30 to 450 RPM |
Thrust bearing | 165,000 ISO lbf (Optional 297,000 ISO lbf) | 165,000 ISO lbf (Optional 297,000 ISO lbf) |
Thrust bearing* | 43,000 Ca90 lbf (Optional 77,000 Ca90 lbf) | 43,000 Ca90 lbf (Optional 77,000 Ca90 lbf) |
Polish rod size | 1¼ in. (32 mm) or 1½ in. (48 mm) | 1¼ in. (32 mm) or 1½ in. (48 mm) |
Max. operating temperature** | 112 °F (50 °C) | 112 °F (50 °C) |
Permanent Magnetic Motor Driveheads Dimension Specifications
| M-75 PMM | M-105 PMM |
Height with retro stuffing box | 69.7 in. (1,770 mm) | 72.7 in. (1,847 mm) |
Height with integral stuffing box | 53.2 in. (1,350 mm) | 56.2 in. (1,427 mm) |
Diameter | 30 in. (760 mm) | 30 in. (760 mm) |
Width | 37 in. (940 mm) | 37 in. (940 mm) |
Weight (no stuffing box) | 1,430 lbs (650 kg) | 1,550 lbs (705 kg) |