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Power End Assembly

Frontier Rig Parts supplies robust power end assemblies designed to convert rotational drive power into the precise reciprocating motion required for efficient mud pump operation. Built to withstand continuous high loads and severe operating conditions, our power end assemblies play a critical role in maintaining consistent pump performance and mechanical reliability.

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Each assembly is manufactured using high-strength materials and precision-machined components, including the power frame, crankshaft, bearings, crossheads, and related drive elements. Designed to operate smoothly under high torque and repetitive stress, these assemblies help reduce vibration, minimize wear, and support long-term operational stability. Compatible with triplex and quintuplex mud pump configurations, our power end assemblies help reduce downtime, simplify maintenance, and ensure dependable performance in demanding drilling environments.

Power End Assembly

Complete power end assemblies engineered to transmit drive power efficiently while supporting smooth, reliable mud pump operation under continuous high loads.

  1. CROSSHEAD ASSEMBLY

  2. PINION ASSEMBLY

  3. CRANKSHAFT ASSEMBLY

  4. POWER FRAME ASSEMBLY

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Power Frame Assembly

Heavy-duty power frames designed to provide structural support, precise alignment, and long-term durability for all power end components.

  1. COVER, CRANKCASE

  2. SCREW, HEX CAP GR5

  3. POWER FRAME

  4. GASKET, CROSSHEAD COVER

  5. SUPPORT, FRAME FRONT

  6. SCREW, HEX HEAD 

  7. CROSSHEAD COVER

  8. SEAL, BLACK STAT O SEAL

  9. SCREW, CAP HEX 

  10. COVER, MAIN BEARING

  11. GASKET, MAIN BEARING COVER

  12. STUD, MAIN BEARING RETAINER CAP

  13. TORQUE NUT WITH WASHER

Crankshaft Assembly

Precision-machined crankshaft assemblies built to convert rotational energy into controlled reciprocating motion with strength and balance.

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  1. Screw, Cap Drilled Hex ⅝” – 11 x 2” Alloy B18.2.1 GR8

  2. Retainer, Eccentric Bearing Outer Race

  3. Bearing, Cylindrical Roller

  4. Retainer, Eccentric Bearing Inner Race

  5. Connecting Rod

  6. Crankshaft

  7. Cap Screw, Hex 1-1/2– 6UNC x 5½” CS B18.2.1 GR8

  8. Gear, Main

  9. Nut, Hex 1-1/2–6UNC with Nylon insert

  10. Tie Wire, 0.048” OD Stainless Steel

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Main Bearings Assembly

Heavy-duty main bearings designed to support crankshaft rotation, reduce friction, and ensure stable long-term power end performance.

10. Screw, Hex Head Cap ¾” – 10 UNC x 2.000” drilled G8

11. Retainer, Main Bearing Outer Race

12. Screw, Cap Drilled Hex 1” – 8 x 2¾” Alloy B18.2.1 GR8

13. 1” Lock Washer, Spring Type

14. Retainer, Main Bearing Inner Race

15. Shim Set, Main Bearing

16. Bearing, Roller

17. Carrier, Crankshaft Bearing RH

        Carrier, Crankshaft Bearing LH

NS. Tie Wire, 0.048” OD Stainless Steel

POWER PINION SHAFT ASSEMBLY

Heavy-duty power pinion shaft assemblies designed to transfer drive torque efficiently from the power source to the crankshaft with stable, reliable performance.

  1. Shaft, Pinion, Herringbone

  2. Screw, Cap Drilled Hex ⅝” – 11 GR8

  3. Plate, Pinion Oil Retainer

  4. Gasket, Pinion Carrier

  5. Carrier, Pinion Bearing

  6. 1” Lock Washer, Spring Type

  7. Screw, Hex Head Cap 1–8 UNC 

  8. Bearing, Cylindrical Roller

  9. Gasket, Seal Plate

  10. Plate, Pinion, Oil Seal

  11. ¾” Lock Washer

  12. Screw, Hex Head Cap ¾” – 10 UNC drilled G8

  13. Seal, Oil 13” Bore x ¾” WD

  14. Race, Pinion Oil Seal

  NS. Seal, Oil 13” Bore x ¾” WD

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CROSSHEAD ASSEMBLY.webp

Crosshead Assembly

Precision-engineered crosshead assemblies built to guide piston motion accurately, reduce side loads, and ensure smooth reciprocating operation.

  1. Screw, Hex Head Cap ⅝” – 11 UNC x 1.500” GR5

  2. Washer, Lock ⅝”

  3. Plate, Stuffing Box Cover

  4. O-Ring, Stuffing Box

  5. Packing, Crosshead Extension Rod

  6. O-Ring, Stuffing Box Cover

  7. Cartridge, Packing

  8. Screw, Socket Head Cap ¾” – 10 UNC x 1¾” LG.

  9. Seal, ¾” Diameter, Black Stat o Seal

  10. Box, Stuffing

  11. Gasket, Stuffing Box

  12. Crosshead

  13. Retainer, Inner Wrist Pin

  14. Screw, Drilled Hex Cap ¾” – 10 x 2⅛” GR8, DH

  15. Bearing, Cylindrical Roller

  16. Pin, Wrist, Crosshead

  17. Retainer, Wrist Pin w/ Lube Cup

  18. Screw, Hex Head Cap ⅞" - 9 UNC x 2½" GR8, DH

  19. Screw, Hex Head Cap 1" - 8 UNC x 3" LG GR5, DH

  20. Rod, Crosshead Extension

  21. Screw, Hex Head Cap 1” – 8 x 2.500” DH

  22. Disc, Baffle

  23. Guide, Crosshead

  24. Screw, Socket Head Cap 1” – 8 UNC x 2½” , DH

  25. Guide, Clamp Bar

  NS. Tie Wire, 0.048” OD Stainless Steel

LINER ASSEMBLY

Complete liner assemblies designed to provide proper sealing, wear resistance, and consistent performance in high-pressure mud pump operations.

  1. Nut, Liner Retainer

  2. Liner 5" - 9"

  3. Cap Screw, Retainer

  4. Flange, Liner Retainer

  5. Wear Plate

  6. Seal, Wear Plate, Urethane

    NS. Splash Baffle, Liner Wash

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PISTON ASSEMBLY.webp

Piston Assembly

High-performance piston assemblies engineered for reliable sealing, reduced wear, and efficient fluid displacement under demanding drilling conditions.

  1. Clamp Assembly

  2. Sub Rod, Piston

  3. Rod, Piston

  4. Piston 5" - 9"

  5. Nut, Lock

VALVE ASSEMBLY

Durable valve assemblies designed to control fluid flow accurately, maintain consistent sealing, and support reliable pump operation.

1. CS Spring

     SS Spring

2. Valve with Bonded Insert

     Valve with Replaceable Insert

3. Valve Seat

NS. Valve Insert

NS. Seat Puller Head

         Valve Seat Puller Kit

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Fluid End Assembly

Heavy-duty fluid end assemblies engineered to manage high-pressure drilling fluids, ensure reliable sealing, and maintain consistent pump performance in harsh operating environments.

  1. Discharge Module, Studded (Included Items 2 – 7)

  2. Discharge Module, Only

  3. Nut – Wedge Adjusting

  4. Stud w/Nut – Frame

  5. Stud w/Nut – Liner Bushing

  6. Stud w/Nut – Discharge to Suction

  7. Suction Module

  8. Bushing – Liner

  9. Seal Retainer

  10. Valve Cover

  11. Screw – Wedge Adjusting

  12. Washer – Wedge Adjusting

  13. Spring – Wedge Assembly

  14. Wedge Assembly

  15. Gasket – Valve Cover

  16. Holder – Valve Guide

  17. Insert – Valve Guide

  18. Pin, Dowell

  19. Plate – Wear

  20. Connector – Discharge

  21. Adapter – Discharge Connector

  22. Packing, Rectangular

  23. Packing, Rectangular

  24. Clamp – Liner

  25. Stud w/ Nut, Discharge Spacer

  26. Seal – Suction Manifold

  27. Collar – Liner

  28. Seal – Module, Wear Plate

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