Roper® 70312 Pump Parts
M8 oversized-drive pin-joint family
ACCA Pumps supplies independently manufactured aftermarket replacement parts for supported Roper® progressive cavity pump configurations. Use the complete pump figure, serial number and construction when identifying parts.
Roper® 70312 Engineering Overview
Roper® identifies the 70312 configuration in its oversized-drive pin-joint cross-reference. The Roper® parts book associates this M-designation family with the corresponding L8 pumping-element references for rotor and stator selection.
Oversized Drive End
The M configuration uses a larger drive-end arrangement while retaining model-specific progressive-cavity pumping elements.
Pin-Joint Service
Inspect pins, bushings, connecting-rod interfaces, retaining hardware and drive-end wear components together.
Complete Figure Required
Rotor, stator and drive-end construction can vary. Confirm the complete pump identification before ordering.
Roper® 70312 Engineering Data
| Roper® Family | 70300 Series |
| Roper® Model | 70312 |
| M Designation | M8 |
| Pumping-Element References | 71212, 72212, 73212 |
| Joint Design | Pin joint / oversized-drive configuration |
| Related Roper® Resource | Roper® 70212 Pump Parts |
Before You Order Roper® 70312 Parts
Use the complete pump identification
Provide the full Roper® figure number, serial number, existing part number, material construction and elastomer. The M-series drive-end configuration and the pumping-element construction must both be confirmed.
Supported Roper® 70312 Pumping Elements
71212
1-stage pumping-element reference used with the M8 family.
72212
2-stage pumping-element reference used with the M8 family.
73212
3-stage pumping-element reference used with the M8 family.
Roper® 70312 Rotor & Stator Part Numbers
Roper®’s cross-reference directs M-designation pumps to the corresponding L-family rotor and stator references. The table below shows the standard plated-steel rotor and Buna 70 steel-tube stator references; alternate materials and elastomers use different part numbers.
| Pumping Element | Rotor Part Number | Stator Part Number | Reference Construction |
|---|---|---|---|
| 71212 | D96-10 | D95-73 | Standard plated-steel rotor / Buna 70 steel-tube stator reference |
| 72212 | D96-11 | D95-77 | Standard plated-steel rotor / Buna 70 steel-tube stator reference |
| 73212 | D96-12 | D95-81 | Standard plated-steel rotor / Buna 70 steel-tube stator reference |
Replacement Parts Available for Roper® 70312 Pumps
Rotors
Stage-specific rotor constructions for the applicable pumping element.
Stators
Buna, natural rubber, EPDM, Viton and other documented constructions where applicable.
Drive-End Components
Drive shafts, adapters, pins, bushings, connecting-rod components and retaining hardware for supported configurations.
Bearings & Seals
Bearings, lip seals, packing and related service components where applicable.
Packing Components
Packing sets, gland components, inserts and lantern rings for documented configurations.
Repair Hardware
Washers, spacers, retainers, keys and associated overhaul components.
Roper® 70312 Verified Drive-End Part Numbers
The following service parts are explicitly identified for the 7X312 configuration, or are listed inside its documented drive-end block in Roper®’s 2026 progressive-cavity parts book. Construction can change the applicable part number.
| Component | Roper® Part Number | Source Basis |
|---|---|---|
| Support spacer | D101-17 | Explicitly listed for 7X312 & 7X412 |
| Rotor band | D101-19 | Explicitly listed for 7X312 adapter-head configuration |
| Rotor head adapter — steel | D101-22 | Explicitly listed for 7X312 |
| Rotor head adapter — stainless | D101-20 | Explicitly listed for 7X312 |
| Rotor pin — steel | D99-34 | Explicitly listed for 312 |
| Rotor pin — stainless | D99-33 | Explicitly listed for 312 |
| Bushing | G61-361 | Listed in the 7X312 drive-end block |
| Bushing | G61-360 | Listed in the 7X312 drive-end block |
Identification note
These references are for technical identification. Always verify the complete Roper® figure, material construction, serial number and existing component before ordering. ACCA does not reproduce Roper® list pricing on these pages.
Roper® 70312 Maintenance Recommendations
Inspect Joint Wear
Check pins, bushings and mating bores as a system.
Verify Drive-End Configuration
Do not substitute a standard-drive component where the oversized M drive end requires a different part.
Confirm Pumping Element
Match rotor and stator to the complete stage-specific pumping-element reference.
Progressive Cavity Engineering Note — Drive-End Loading
Progressive cavity pumps transmit hydraulic and rotor/stator loads through the connecting rod and drive end. An oversized drive-end configuration can provide additional mechanical capacity while retaining the pumping-element geometry appropriate to the service.
Frequently Asked Questions
What does Roper® 70312 correspond to?
The Roper® parts cross-reference identifies 70312 with the M8 oversized-drive family and directs rotor/stator selection to the related L8 pumping-element references.
Are the drive-end and pumping-element part numbers the same as the 70200 model?
No. Rotor and stator references can be shared through the documented cross-reference, while the oversized-drive configuration can require different drive-end components.
What information should I send for a quote?
Send the complete pump figure, serial number, existing part number, quantity, construction and photographs when available.
Can ACCA supply individual service components?
Yes. ACCA can support individual replacement components for applicable configurations after the installed pump is identified.
Related Progressive Cavity Pump Parts Resources
Roper® 70300 Parts
Return to the 70300 model selector.
Roper® 70212 Parts
View the related standard-drive pumping-element resource.
Roper® Pump Parts
Browse the complete Roper® parts hub.
Need Help Identifying Roper® 70312 Parts?
Send the complete Roper® figure number, serial number and existing part number when available.