SMIGROUP LAFERT B7116Q-03323 400V AC Servo Motor – IP65 Rated

Description

Key Technical Specifications

Product Introduction & Supply Chain Strategy

The SMIGROUP LAFERT B7116Q-03323 is a high-performance brushless AC servo motor from the B71 series, designed for precision motion control applications requiring high torque density and wide speed range. This 8-pole permanent magnet synchronous motor delivers 22 Nm stall torque and achieves rated speed of 4500 rpm with peak torque capability of 55.2 Nm for acceleration phases Common applications include packaging machinery, material handling, robotics, CNC feed axes, and converting lines where dynamic response and positioning accuracy are critical.

Buying this servo motor as New Surplus protects your motion control investment against supply chain disruptions. Lafert maintains the B71 series as an active product line, but lead times for specific winding configurations (such as the -03323 variant) can extend to 12-16 weeks . Refurbished servo motors carry unacceptable risks: demagnetized permanent magnets from overheating, degraded winding insulation from thermal cycling, worn bearings with increased runout, and compromised resolver or encoder feedback. A failed servo motor on a critical motion axis triggers unplanned downtime costing 5,000-25,000 per hour in packaging or converting lines. Our new surplus stock delivers full 10-15 year expected service life, original winding integrity, new bearings, and verifiable factory specifications. For multi-axis machines, we recommend strategic hoarding of 1-2 spare motors per motion control cabinet.

Installation & Configuration Guide

Stage 1: Pre-Installation (Prep & Safety)

• Lock-out/tag-out (LOTO): Disconnect and lock out the servo drive’s 400 VAC input power. Wait 5 minutes for DC bus capacitors to discharge. Verify zero voltage at drive input and motor terminals.
• Tools: Torque wrench (Nm spec), hex keys (metric), dial indicator (for coupling alignment), ESD strap, camera, permanent marker.
• Document existing configuration: Take photos of the motor nameplate (full model string), drive parameters (motor data table values), and feedback device type (resolver or encoder).
• Mark cable connections: Label power leads (U, V, W) and feedback cable pins at both motor and drive ends. Do NOT trust color coding alone.
• Check coupling type: Determine if direct-coupled, belt-driven, or geared. Measure existing alignment before removal.

Stage 2: Removal

• Remove the feedback cable from the motor connector first, then from the drive. Protect connectors with caps.
• Disconnect power cables (U, V, W) at the motor. Note phase order – swapping any two phases reverses direction.
• Remove mechanical coupling: Loosen coupling set screws. Use a puller if the coupling is seized. Do NOT hammer the shaft – this damages bearings and encoder.
• Remove mounting bolts (typically four M8 or M10). Support the motor weight – 13.5 kg
• Extract the motor straight off the mounting flange. Do NOT pry against the shaft or flange pilot.

Stage 3: Installation (Clone & Seat)

• Inspect the mounting surface: Clean the B5 flange pilot bore (∅130j6) . Remove old corrosion or burrs.
• Install the coupling onto the new motor shaft per coupling manufacturer torque specs.
• Mount the motor: Align the pilot diameter with the mating flange. Push the motor straight onto the flange.
• Install and torque mounting bolts to manufacturer specification (typically 40-50 Nm for M10 class 10.9). Use a cross pattern.
• Connect power cables (U, V, W): Follow exact phase order from documentation. Incorrect phasing = reverse rotation.
• Connect the feedback cable: Resolver or encoder wiring must match pin-for-pin. Polarity reversal causes commutation faults.
• Check shaft alignment: Use a dial indicator on the coupling. Misalignment >0.1mm TIR will destroy bearings within weeks.

Stage 4: Power-On & Testing

• Re-engage 400 VAC input power to the servo drive.
• Energize the drive (24 VDC control power first, then main DC bus).
• Verify encoder/resolver feedback: Use the drive’s diagnostic screen. Rotate the shaft manually – the feedback position should change smoothly.
• Jog the motor at low speed (50 rpm): Verify rotation direction matches machine requirements. If reversed, swap any two of U, V, W.
• Run auto-tuning: Most modern drives have an autotune function that measures stator resistance, inductance, and inertia. Execute this before full-speed operation.
• Test at rated speed (4500 rpm): Monitor motor temperature, current draw, and vibration. Current should match the nameplate rated current (15.6 Arms) at full load
• Verify IP65 seal: Check that all cable glands and connectors are tightened. The motor is IP65-rated – water ingress voids warranty.

B7116Q-03323

B7116Q-03323

Firmware/Software Versions & Upgrade Notes

The B7116Q-03323 is an analog servo motor. It contains no firmware, no programmable parameters, and no onboard intelligence.

• No firmware updates required: This is a hardware-only motor. The intelligence resides in the servo drive.
• Critical drive parameter matching: The servo drive must be programmed with the motor’s specific electrical parameters:
  • Stall current (Io): 20.2 Arms
  • Rated current (In): 15.6 Arms
  • Peak current (Ipk): 63.2 Arms
  • Torque constant (kt): 1.09 Nm/A
  • Voltage constant (ke): 0.63 Vs
  • Resistance (Rw): 0.34 Ω
  • Inductance (Lw): 4.1 mH
  • Number of poles: 8
• Feedback device configuration: The motor’s resolver or encoder type must match the drive’s feedback card. Document the old motor’s feedback type before removal.
• Commutating offset: If replacing a motor on an existing drive, the commutation offset (electrical angle between rotor flux and encoder zero) must be re-learned. Run the drive’s autotune or commutation alignment routine.

Frequently Asked Questions (FAQ)

Q: Why is this cheaper than OEM direct but more expensive than used/refurbished units?
A: OEM sells at full list price. We sell new surplus from authorized overstock channels – same factory-sealed motor, no dealer markup. Used motors are pulled from decommissioned machines with unknown operating hours. Magnets demagnetize with heat and age. Windings degrade. Bearings wear. A refurbished servo motor that fails mid-production causes 5,000-25,000 per hour in downtime. The $1,000 you save on a used motor disappears in the first 30 minutes of unplanned stoppage.

Q: Are these really new? They look identical to used units online.
A: New original. Factory-sealed anti-static packaging. Zero hours on the motor. Original windings, new bearings (6205 and 6203 2ZC3WT) , never overheated. OEM packing slips and traceable serial numbers available upon request. We never sell pulls, refurbished, or repaired inventory.

Q: Is the B7116Q-03323 obsolete or end-of-life?
A: The B71.16Q base model remains in Lafert’s Preferred Series catalog as an active product . However, the -03323 suffix indicates a specific winding or feedback variant that may have extended lead times. For critical motion axes, we recommend maintaining 1-2 spare units as buffer stock.

Q: What is the difference between the B71 series and B16 series?
A: The B71 series (this motor) delivers 22 Nm stall torque in a compact 142 mm flange frame. Lafert’s B16 series covers higher torque applications from 140 to 390 Nm for larger machinery. Choose based on your torque requirements and available cabinet space.

Q: Does this motor include a brake?
A: The base B71.16Q specification does not include a parking brake Brakes are available as an optional feature. Check your original motor nameplate for “BRK” designation. If your application requires a holding brake (vertical axes, gravity-loaded systems), verify the replacement includes this option.

Q: Can I use this motor with any servo drive?
A: Not directly. The motor requires a 400 VAC, 3-phase servo drive capable of delivering 20.2 Arms stall current and 63.2 Arms peak current The drive must support 8-pole permanent magnet synchronous motors. Common compatible drive brands include Lafert’s own servo drives, as well as third-party drives with configurable motor parameter tables. You must enter the motor’s specific electrical constants (Rw, Lw, kt, ke) into the drive for proper commutation.

Q: What is the IP rating? Can I wash down this motor?
A: IP65 – dust-tight and protected against low-pressure water jets from any direction. Acceptable for light washdown but not high-pressure spray. Not suitable for submersion. Ensure all cable glands and connectors are properly sealed after installation.

Q: What is your warranty?
A: 2 years from invoice date. Covers manufacturing defects – winding shorts, open phases, bearing failure, feedback device malfunction. Does not cover damage from incorrect wiring (phase reversal, overvoltage), mechanical overload (exceeding 55.2 Nm peak torque), water ingress (if IP65 seal compromised), or improper mounting.

Q: Do you provide test reports?
A: Yes. Every B7116Q-03323 ships with a QC Test Report including: winding resistance measurement (phase-to-phase), insulation resistance (megger test at 500 VDC), hi-pot test, bearing runout check, feedback device function test, and nameplate verification. Signed by the testing technician.

Q: Can your team help me find the correct drive parameters?
A: Yes. Contact our technical sales desk with your servo drive brand and model. We can provide the motor data table values for most major drive brands (Allen-Bradley, Siemens, Bosch Rexroth, Mitsubishi, Yaskawa, Kollmorgen).