Power Section Specification (Metric)
287-5635
73 mm 5:6 Lobes 3.5 Stages
Rotor Specifications
Overall Length 2362.2 mm
Avg. Diameter 35.93 mm
Contour Length 2159.0 mm
Eccentricity 2.99 mm
Major Diameter 41.91 mm
Head Diameter 44.45 mm
Head Length 203.2 mm
Weight 20 kg
Thread Form 0.75-10 UNC
Stator Specifications
Overall Length 2504.9 mm
Tube OD 73.02 mm
Contour Length 2143.3 mm
Tube ID 60.32 mm
Rubber Cut-back
Side 1: 181.0 mm
Side 2: 181.0 mm
Weight 30 kg
Material Alloy Steel
Performance Specifications
Flow Range 227-473 LPM
Rev per Unit Volume 0.89 Rev/L
Speed Range 202-422 RPM
No Load Pressure Loss 862 kPa
  XTH RTP
Max Rec Press 5,850 kPa 5,320 kPa
Torque @ Max Press 940 N-m 860 N-m
Stall Pressure 8,780 kPa 7,980 kPa
Stall Torque 1,410 N-m 1,280 N-m
Stator Minors and Fit (mm) at 21°C
  RTP XTH
Group Minor Fit Minor Fit
0 35.74 0.19
4 35.99 -0.06
7 36.35 -0.42 36.47 -0.55
Reline Lengths (mm) Max 2505 Min 2353 Alternate Stator OD (mm): - / -
Torque
Differential Pressure (kPa) 0 5,000 Torque (Nm) 0
Fit Increase
Change in Temperature (°C) 0 100 200 Fit Increase (mm) 0
Speed
Differential Pressure (kPa) 0 5,000 Speed (RPM) 0
Mechanical Power
Differential Pressure (kPa) 0 5,000 10,000 Mechanical Power (Kw) 0
Torque
Differential Pressure (kPa) 0 2,000 4,000 6,000 8,000 Torque (Nm) 0 200 400 600 800 1,000
Fit Increase
Change in Temperature (°C) 0 50 100 150 200 Fit Increase (mm) 0 0.5 1 1.5 2
Speed
227 LPM 350 LPM 473 LPM Differential Pressure (kPa) 0 1,000 2,000 3,000 4,000 5,000 6,000 7,000 8,000 Speed (RPM) 0 100 200 300 400 500
Mechanical Power
227 LPM 350 LPM 473 LPM Differential Pressure (kPa) 0 2,000 4,000 6,000 8,000 10,000 Mechanical Power (Kw) 0 10 20 30 40
©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.