Seepex® Drive and Joint Parts
Replacement coupling rods, drive shafts, joint pins, bushings, sleeves, retainers, seals and related drive-train components for supported Seepex® BN, MD, BT and CS pumps.
Selection begins with the complete pump model and joint construction. Clear photographs, critical dimensions, drawings or a physical sample may be needed to confirm form, fit and function.
Replacement Drive-Train Components for Seepex® Pumps
A progressive cavity pump drive train transfers motor torque to a rotor that moves eccentrically inside the stator. Coupling rods and articulated joint components accommodate that motion while drive shafts, pins, bushings, sleeves, retainers and seals maintain alignment and protect loaded interfaces.
These components are construction-specific. The pump range, complete model, joint type, shaft and connection geometry, material and dimensions must be confirmed before replacement.
Seepex® Drive and Joint Components
Coupling Rods
Torque-transmission members reviewed for overall length, end geometry, joint construction, material and operating load.
Drive Shafts
Shafts confirmed from complete model, diameters, shoulders, threads, keyways, seal surfaces and drive connection.
Joint Pins
Loaded joint components selected around pin diameter, length, retention method, material and mating parts.
Bushings
Wear bushings reviewed for inside and outside diameter, width, material and fitted joint arrangement.
Joint Sleeves
Protective or loaded sleeves confirmed from model, location, wall dimensions, material and mating geometry.
Retainers and Hardware
Rings, clips, locking pieces, plugs, fasteners and related retention components for supported constructions.
Joint Seals
Boots, sleeves, O-rings and sealing elements selected around fluid, temperature, movement and joint design.
Repair Sets
Grouped wear components evaluated for the complete model and exact joint construction rather than assumed interchangeability.
Special and Legacy Parts
Uncommon components evaluated using accurate photographs, measurements, drawings or physical samples.
Seepex® Pump Families Supported
BN Series
Drive shafts, coupling rods and articulated joint wear parts for supported standard block-pump models.
MD Series
Compact drive and joint components for supported metering-pump models and stage configurations.
BT Series
Coupling, joint, shaft and feed-related drive components for supported hopper-pump constructions.
CS Series
Supported flexrod, open-joint and closed-joint components subject to material and hygienic requirements.
Information Needed for Identification
Complete Pump Model
Provide every letter, number and suffix available from the nameplate or equipment records.
Component and Location
Name the required item and show where it fits within the drive train or joint assembly.
Overall Dimensions
Record lengths, diameters, shoulder positions, wall thicknesses and connection measurements.
Connection Geometry
Document threads, keyways, splines, cross holes, pins, flats, shoulders and retention features.
Clear Photographs
Send full views and close-ups of both ends, wear surfaces, markings and damaged areas.
Service Conditions
Include fluid, temperature, solids, corrosion, speed, pressure and known torque or failure conditions.
Common Drive and Joint Wear Indicators
Pin and Bushing Wear
Signs: looseness, impact marks, elongated holes or metallic debris. Inspect all mating joint components.
Sleeve Damage
Signs: grooves, cracks, thinning or distortion. Review alignment, lubrication, contamination and loading.
Connection Wear
Signs: damaged threads, rounded keyways, worn flats or loose fits. Measure both mating components.
Seal or Boot Failure
Signs: tears, leakage, swelling or loss of lubricant. Check chemistry, temperature and joint movement.
Rod or Shaft Damage
Signs: bending, cracking, fretting or localized wear. Investigate torque, alignment and pressure events.
Noise and Vibration
Signs: knocking, cyclic vibration or movement at the joint. Stop and inspect before secondary damage occurs.
Inspect the Assembly, Not Only One Wear Part
| Inspection Area | What to Check | Why It Matters |
|---|---|---|
| Joint pairings | Pins, bushings, sleeves, holes and retainers | A new component can wear rapidly against a damaged mating surface |
| Coupling rod | Straightness, end geometry, cracks and fretting | Transfers torque while accommodating eccentric rotor motion |
| Drive shaft | Keyways, threads, shoulders, seal surface and runout | Affects alignment, sealing and torque transmission |
| Sealing elements | Boots, O-rings, sleeves and lubricant condition | Contamination or lubricant loss accelerates joint wear |
| Rotor connection | Pin bores, threads, flats and mating geometry | Damage can propagate into the rotor and complete drive train |
How to Request Drive and Joint Parts
Send the complete pump designation exactly as shown in the equipment records.
Name the coupling rod, shaft, pin, bushing, sleeve, retainer, seal or repair component required.
Show how the part fits, then provide close-ups of both ends and all critical features.
Provide overall dimensions plus all fits, connections, holes, threads, keyways and shoulders.
Explain the wear pattern, operating conditions and any recent noise, vibration, leakage or overload.
Frequently Asked Questions
How do I identify a Seepex® joint component?
Provide the complete pump model, component name, assembly photographs and accurate dimensions. A drawing or physical sample may be needed.
Should pins and bushings be inspected together?
Yes. A worn mating component can damage a new part or leave excessive clearance in the repaired joint.
Can ACCA supply a complete joint repair set?
ACCA can evaluate grouped components for supported models when the exact joint construction and required items are confirmed.
What dimensions are needed for a drive shaft?
Provide total length, all diameters and shoulders, threads, keyways, holes, seal surfaces and connection details.
Can ACCA evaluate a special or obsolete coupling rod?
Yes, when accurate photographs, dimensions, an existing drawing or a physical sample are available to establish the required geometry.
Are food or hygienic joint components automatically certified?
No. Any required material, finish, product-contact approval or certification must be stated and explicitly confirmed for the quoted replacement.
Review ACCA’s dedicated Seepex® rotor and stator pages for material, identification and wear guidance.
Seepex® Replacement Rotors →
Seepex® Replacement Stators →
Seepex® Mechanical Seals and Packing →
Request Seepex® Drive and Joint Parts
Send the complete model, component name, assembly photographs and critical dimensions. ACCA will review the information needed to confirm a supported replacement.
Complete pump model
Component required
Assembly and detail photographs
Critical dimensions
Drawing or sample, when available
Fluid and temperature
Solids and corrosion
Pressure and speed
Noise, vibration or leakage
Wear and failure history
Trademark Disclaimer: Seepex® is a registered trademark of its respective owner. References to Seepex® are used solely to identify compatible equipment. ACCA Pumps is an independent aftermarket manufacturer and is not affiliated with or endorsed by the trademark owner. Read the full disclaimer.