Power Section Specification (Metric)
500-6780
127 mm 6:7 Lobes 8.0 Stages
Rotor Specifications
Overall Length 6070.6 mm
Avg. Diameter 66.93 mm
Contour Length 5918.2 mm
Eccentricity 4.86 mm
Major Diameter 76.66 mm
Head Diameter 73.66 mm
Head Length 152.4 mm
Weight 170 kg
Thread Form 2 3/8" HEF
Stator Specifications
Overall Length 6375.4 mm
Tube OD 127.00 mm
Contour Length 5994.4 mm
Tube ID 101.60 mm
Rubber Cut-back
Side 1: 177.8 mm
Side 2: 177.8 mm
Weight 247 kg
Material Alloy Steel
Performance Specifications
Flow Range 568-1325 LPM
Rev per Unit Volume 0.21 Rev/L
Speed Range 120-282 RPM
No Load Pressure Loss 931 kPa
  POB XTH PRR
Max Rec Press 12,620 kPa 13,880 kPa 12,620 kPa
Torque @ Max Press 8,300 N-m 9,130 N-m 8,300 N-m
Stall Pressure 18,930 kPa 20,820 kPa 18,930 kPa
Stall Torque 12,450 N-m 13,700 N-m 12,450 N-m
Stator Minors and Fit (mm) at 21°C
  PRR POB XTH
Group Minor Fit Minor Fit Minor Fit
T 66.83 0.11 66.83 0.11 66.83 0.11
0 67.18 -0.25 67.18 -0.25 67.18 -0.25
4 67.51 -0.58 67.51 -0.58 67.51 -0.58
6 67.89 -0.96 67.82 -0.88 67.82 -0.88
Reline Lengths (mm) Max 6375 Min 6223 Alternate Stator OD (mm): 120.6 / -
Torque
Differential Pressure (kPa) 0 10,000 Torque (Nm) 0
Fit Increase
Change in Temperature (°C) 0 100 200 Fit Increase (mm) 0
Speed
Differential Pressure (kPa) 0 10,000 Speed (RPM) 0
Mechanical Power
Differential Pressure (kPa) 0 10,000 20,000 Mechanical Power (Kw) 0
Torque
Differential Pressure (kPa) 0 5,000 10,000 15,000 Torque (Nm) 0 2,000 4,000 6,000 8,000 10,000
Fit Increase
Change in Temperature (°C) 0 50 100 150 200 Fit Increase (mm) 0 1 2 3
Speed
568 LPM 946 LPM 1325 LPM Differential Pressure (kPa) 0 5,000 10,000 15,000 Speed (RPM) 0 100 200 300
Mechanical Power
568 LPM 946 LPM 1325 LPM Differential Pressure (kPa) 0 5,000 10,000 15,000 20,000 Mechanical Power (Kw) 0 100 200 300
©2026 NOV. All rights reserved. Except as noted, all trademarks referenced in this document are trademarks of NOV. Performance curves describe theoretical performance with 175°F (79°C) water and are for reference only. Operational fit and drilling conditions will affect performance. Operation above maximum recommended limits will reduce life. Specification data are subject to change without notice.
PS App v.