121131 Main Shaft for Nov Varco TDS11SA TDS8SA Top Drive
Core Functions
As the central drive component of the VARCO TDS11SA Top Drive System, the Main Shaft fulfills the following critical missions:
High-Torque Transmission: Directly drives drill string rotation under extreme drilling torque;
Composite Load Bearing: Integrates axial lifting, radial vibration, and torsional stress;
Dynamic Sealing Hub: Ensures rotational sealing reliability of high-pressure drilling fluid channels;
Precise Power Transfer: Connects top drive motors to the drill string, enabling zero-loss power transmission.
| Part Number | Description |
| 109591 | (MT)SLEEVE,FLANGED,7.87ID,300SS |
| 110040 | (MT)SLEEVE,MAINSHAFT |
| 119707 | SHAFT,MAIN, TDS10 |
| 121131 | SHAFT,MAIN |
| 110040-1 | SLEEVE, MAINSHAFT, TDS11 |
| 10428 | Main shaft TESCO 10428 |
| 720479 | Main shaft |
| 5049165-1 | Quill Ø3.0″Bore NC61Pin EXI |
| 810276 | Intermediate helical shaft assembly (1096:1) №810276 Tesco |
| 810375 | Main shaft |
| 30125860-API | STEM/MAIN SHAFT,API IDENTIFIED |
| 30125860 | STEM/MAIN SHAFT |
| 830044-1 | Quill,NC50Pinx6.25-3ACME-2G-LH Pin,2.5″Bore |
| 1060119 | shaft TD275 |
| 1065612 | Main shaft XT |
| 1044883 | Main shaft HT |
| 830044 | Main shaft |
| 1.01.16.020 | Main shaft 1.01.16.020 DQ-40LHTY-JQ(250T) |
| 1.01.38.006 | Main shaft 1.01.38.006 DQ-40LHTY-JQ(250T) |
| 1.02.51.052 | Main shaft1.02.51.052 DQ-40LHTY-JQ(250T) |
| M614000582 | MAIN SHAFT |
| 121151 | MAIN SHAFT W/LANDING COILLAR |
| 30178841 | UMBRELLA.MAINSHAFT |
| 110040-l | SLEEVE,MAINSHAFT |
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