A20B-1004-0070 FANUC Encoder Sensor Unit with Mounting Bracket

The A20B-1004-0070 is a FANUC encoder sensor, commonly described as a sensor unit with mounting bracket. It is used in compatible FANUC CNC motor feedback or sensor-related applications to support position feedback, speed feedback, spindle feedback, or machine control functions depending on the original equipment configuration.

This model is supplied as a FANUC encoder sensor / sensor unit, not a complete motor, complete spindle amplifier, or complete CNC control system. It is also listed as discontinued by manufacturer, so stock availability and compatibility should be confirmed before ordering.

Worldwide Shipping & REACO CNC Service

• Worldwide Shipping: We can ship worldwide by DHL, UPS, FedEx, or other available logistics channels.
• Fast Handling: In-stock items can usually be shipped within 1-2 working days after payment.
• 100% Checked Before Delivery: Each qualified encoder sensor unit is checked before shipment. Product photos can be sent before delivery when required.
• REACO Warranty: New or refurbished products usually include a 1-year warranty, and used 90% new products usually include a 3-month warranty.
• Free Technical Support: Our team can help with basic model confirmation, sensor matching, and replacement guidance.

Product Information

Product Application

The FANUC A20B-1004-0070 encoder sensor unit is mainly used for compatible FANUC CNC motor feedback or sensor-related applications. It may be required when the original encoder sensor is damaged, unstable, contaminated, physically worn, or causing feedback-related alarms or machine operation issues.

If your machine has feedback signal loss, unstable speed detection, position feedback problems, sensor alarms, or abnormal motor or spindle operation, this model may be considered as a replacement after confirming the full sensor model, motor model, mounting bracket requirement, connector layout, and CNC system compatibility.

Mounting Bracket Note

The provided product information states that A20B-1004-0070 is supplied with mounting bracket. Before ordering, please confirm that the bracket structure, installation position, connector layout, and mechanical fit match your original sensor unit.

Mounting accuracy is important for encoder sensor replacement. Incorrect installation, bracket mismatch, loose mounting, or connector mismatch may cause feedback alarms, unstable signal output, speed detection errors, or positioning problems.

Quality Control and Checking

For FANUC encoder sensors and sensor units, careful checking is important because sensor condition directly affects motor feedback, CNC positioning accuracy, speed control, spindle feedback, and machine reliability. REACO CNC checks qualified products carefully and can provide real product photos before delivery when required.

Our goal is to help customers receive reliable FANUC CNC spare parts with clear product information, careful inspection, responsive after-sales support, and practical technical assistance.

Compatibility Confirmation

Before ordering, please confirm that the full sensor model on your original part is A20B-1004-0070. Similar FANUC encoder sensors may have different mounting brackets, connector layouts, motor compatibility, sensor specifications, cable requirements, or CNC system compatibility.

Please pay special attention to the mounting bracket structure. If you are not sure whether this FANUC encoder sensor unit is suitable for your machine, please send photos of the original sensor label, mounting bracket, connector photos, motor or spindle motor nameplate, CNC system model, and alarm information. REACO CNC can help check the details before purchase.