Power Section Specification
287-5635
2.875" 5:6 Lobes 3.5 Stages
Rotor Specifications
Overall Length 93.00 in
Avg. Diameter 1.414 in
Contour Length 85.00 in
Eccentricity 0.118 in
Major Diameter 1.650 in
Head Diameter 1.750 in
Head Length 8.00 in
Weight 44 lb
Thread Form 0.75-10 UNC
Stator Specifications
Overall Length 98.62 in
Tube OD 2.88 in
Contour Length 84.38 in
Tube ID 2.375 in
Rubber Cut-back
Side 1: 7.12 in
Side 2: 7.12 in
Weight 65 lb
Material Alloy Steel
Performance Specifications
Flow Range 60-125 GPM
Rev per Unit Volume 3.38 Rev/Gal
Speed Range 202-422 RPM
No Load Pressure Loss 125 psi
  XTH RTP
Max Rec Press 850 psi 770 psi
Torque @ Max Press 690 ft-lbs 630 ft-lbs
Stall Pressure 1,270 psi 1,160 psi
Stall Torque 1,040 ft-lbs 940 ft-lbs
Stator Minors and Fit (in) at 70°F
  RTP XTH
Group Minor Fit Minor Fit
0 1.407 0.007
4 1.417 -0.003
7 1.431 -0.017 1.436 -0.022
Reline Lengths (in) Max 99 Min 93 Alternate Stator OD (in): - / -
Torque
Differential Pressure (psi) 0 500 Torque (ft-lb) 0
Fit Increase
Change in Temperature (°F) 0 100 200 300 Fit Increase (in) 0
Speed
Differential Pressure (psi) 0 500 Speed (RPM) 0
Mechanical Power
Differential Pressure (psi) 0 500 1,000 Mechanical Power (hp) 0
Torque
Differential Pressure (psi) 0 100 200 300 400 500 600 700 800 900 Torque (ft-lb) 0 200 400 600 800
Fit Increase
Change in Temperature (°F) 0 50 100 150 200 250 300 350 Fit Increase (in) 0 0.02 0.04 0.06 0.08
Speed
60 GPM 93 GPM 125 GPM Differential Pressure (psi) 0 100 200 300 400 500 600 700 800 900 Speed (RPM) 0 100 200 300 400 500
Mechanical Power
60 GPM 93 GPM 125 GPM Differential Pressure (psi) 0 200 400 600 800 1,000 Mechanical Power (hp) 0 20 40 60
©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.