Product Core Brief
- Model: 8LSA46.EB030D300-3
- Brand: B&R Industrial Automation
- Series: 8LS 3-Phase Synchronous
- Core Function: Delivers high-precision motion control and torque for automated industrial axes.
- Product Type: AC Servo Motor
- Key Specs: 3000 RPM Nominal | 7.7 Nm Torque | Optical EnDat Encoder
- Condition: New Surplus / Original OEM
Key Technical Specifications
- Manufacturer: B&R Industrial Automation
- Part Number:6.
- Product Category: Three-Phase Synchronous Servo Motor
- Nominal Speed: 3000 RPM
- Number of Pole Pairs: 5
- Nominal Torque: 7.700 Nm
- Stall Torque: 10.000 Nm
- Encoder Type: Optical EnDat
- Centering Diameter: 95.00 mm (j6 fit)
- Flange Square Dimension: 100.00 mm
- Cooling Type: Self-cooling (Built-in connector)
- Motor Version: 3
Product Introduction (No Fluff)
This 6. is a high-performance three-phase synchronous motor engineered for demanding automated axes. It provides precise, repeatable positioning and consistent torque output for complex manufacturing cells.
Sourcing this exact OEM replacement part prevents extended machine downtime when legacy servo motors fail or suffer from bearing wear. Keeping verified new surplus stock on hand allows integrators to bypass extended lead times and restore axis functionality immediately.
QA & Testing SOP (Dynamic & Transparent)
Servo motors require rigorous mechanical and electrical validation. Ev6. undergoes a strict inbound anti-counterfeit audit, verifying the nameplate, shaft key dimensions, and connector pin integrity against B&R baselines. Next, we mount the motor on a dedicated test bench to validate the optical EnDat encoder signal quality and verify winding resistance across the phases. We then perform a no-load run-up to 3000 RPM to check for bearing noise, vibration, and thermal stability. Finally, a 2-hour continuous burn-in ensures the stator windings don’t degrade under nominal load. All units ship in heavy-duty protective packaging with a printed QA test report.
Installation Pitfalls & Guide (Engineer to Engineer)
❗ Shaft Key & Coupling Alignment: The 19.00 mm k6 shaft key is a precision fit. Never hammer the coupling onto the shaft. Misalignment here will destroy the A-side bearing in weeks. Use a proper torque wrench on the set screws and verify runout with a dial indicator.
❗ Encoder Cable Shielding: The optical EnDat encoder is highly sensitive to EMI. If your previous motor started throwing position faults, check the encoder cable shield. It must be grounded at the drive end only. A floating shield acts as an antenna and will corrupt the feedback signal.
❗ Self-Cooling Airflow Clearance: This is a self-cooling (Type A) motor. It relies entirely on ambient airflow over the finned housing. If you are mounting it in a tight enclosure or vertically without a fan, it will overheat and trip the drive’s thermal model. Ensure adequate clearance.
Replacement Protocol:
- Pre-Install: Lock out the drive power. Verify 0 VDC at the motor connector. Support the axis mechanically to prevent it from dropping.
- Removal: Disconnect the power and encoder cables. Unbolt the motor from the flange. Extract the shaft key and inspect for shearing.
- Install: Clean the mating flange. Align 6. and secure the flange bolts in a star pattern. Reinstall the shaft key and coupling.
- Power-on Test: Restore drive power. Perform an encoder commutation check and run a basic homing routine. Monitor the drive’s torque and thermal status before returning to auto mode.
Technical FAQ
Is this an exact drop-in replacement for my failed 8LSA46 motor?
Yes, provided your original motor shares the 8LSA46 size code and 3000 RPM nominal speed. However, B&R offers multiple encoder options (resolvers, inductive, optical). Always verify the full part number, especially the “EB” encoder code, to ensure your drive is configured for the correct feedback type.
Why is this listed as “New Surplus” instead of factory-new?
This is genuine B&R stock that was never deployed on a factory floor. It has been stored in climate-controlled inventory rather than running in a hot, vibrating machine. You receive the exact same lifespan and reliability as a factory-fresh unit, typically at a significantly lower cost and without the 16-week lead time.
Can I swap this motor while the ACOPOS drive is powered?
Absolutely not. Disconnecting the motor power cables under load will cause severe arcing, destroying both the motor connector and the drive’s IGBTs. Always lock out and tag out the drive, and wait for the bus capacitor discharge LED to extinguish before touching the cables.
What is the warranty coverage on this part?
We provide a standard 12-month functional warranty. If the motor fails under normal operating conditions within that window, we replace it. Our QA testing proves the motor functioned perfectly before it left our bench, so we stand behind our inventory.
My 8LS axis is failing. Should I replace this motor or check the drive?
Before replacing 6., always measure the motor winding resistance and check the encoder cable continuity. A shorted cable can mimic a dead motor. If the electricals check out and the bearing is physically seized, then replace the motor. If the drive is throwing overcurrent faults with the motor disconnected, the ACOPOS module is likely at fault.
