| Product Condition | New original or used original (Grade A). Please confirm the condition with us before ordering. |
| Shipping Information | Ships from Shanghai. Lead time: 3–5 working days after order confirmation. Worldwide delivery by DHL, FedEx or UPS. Items containing batteries or classified as dangerous goods (UN3091) require special handling — contact our Shanghai office before ordering. |
| Buyer Benefits |
Genuine FANUC A860-2120-T401 AiBZ spindle magnetic sensor (spindle encoder read head), 256 teeth. This is the Alpha i spindle motor sensor that works together with the spindle magnetic gear (ring) to detect spindle rotation speed and angular position. The sensor feeds position and speed feedback to the FANUC CNC, enabling spindle orientation (oriented stop), rigid tapping and C-axis positioning on FANUC Alpha i spindle drive systems. It is a critical spare part when the spindle loses position feedback, triggers an orientation alarm, or shows erratic rigid-tapping accuracy. Every unit is inspected and tested before shipment. We supply new original or tested-used original (Grade A) and confirm the exact fitment against your spindle motor model or drive unit nameplate before you order. |
| Item Location | Shanghai, China. Stock status confirmed on inquiry. |
| Payment Information | PayPal, T/T (bank transfer) or Alibaba Trade Assurance. |
12,000+ parts in stock，Tested before shipping，Reply within 24 hours
Inquiry| Category | Spindle Magnetic Sensor / Spindle Encoder Read Head |
| Part Number | A860-2120-T401 |
| Type | FANUC AiBZ spindle magnetic sensor, 256 teeth |
| Compatible Spindle | FANUC Alpha i spindle motors / spindle drive systems |
| Function | Works with the spindle magnetic gear (ring) to detect spindle rotation speed and angular position, providing feedback for spindle orientation, rigid tapping and C-axis positioning |
| Supplied With | Magnetic gear ring (256 teeth) |
Fitment is verified per unit. Confirm your exact spindle motor model or drive unit nameplate with us before ordering.
The A860-2120-T401 is a non-contact magnetic read head that works with the spindle magnetic gear to measure spindle rotation speed and angular position. It feeds this data back to the FANUC CNC so the control can perform spindle orientation, rigid tapping and C-axis functions reliably. It is the correct replacement when a spindle sensor assembly wears out or fails and the spindle loses position feedback.
Specific alarm codes vary by control model and are not officially documented here. Send your spindle motor model or drive unit nameplate and we help identify the fault.
Other FANUC Alpha i spindle sensors and spindle feedback components. Send your spindle motor model or drive unit nameplate and we confirm the exact match before you order.
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