8.A121.F324.G323 SSI Encoder with Ø16 mm AX Adapter

For 8.A121.F324.G323, EncoderWorks can provide a custom compatible replacement solution for large-shaft SSI absolute encoder systems where the key checks are ø16 mm H7 bore fit, encoder-side locking-ring clamping, 70 mm torque-arm preload, SSI Gray-code timing, and radial M23 connector wiring. This model should not be treated like an Ethernet/IP or Profibus AX encoder, because the controller reads position through SSI clock/data timing rather than fieldbus device configuration. Typical production lead time: 15 working days.

This configuration combines a Kübler AX hollow-shaft adapter with a Sendix F5863 absolute multiturn encoder. The AX section provides the ø16 mm hollow-shaft bore, locking ring on the encoder side, and 70 mm torque arm, while the encoder body provides 13-bit singleturn plus 12-bit multiturn position feedback through an SSI Gray-code interface and one radial M23 connector. Replacement work should focus on shaft fit, clamp torque, torque-arm alignment, SSI clock frequency, data polarity, Gray-code interpretation, preset or setting-button behavior, and shield grounding.

System Limits

The first system limit is SSI timing. The controller must match the expected SSI clock, data polarity, bit length, and Gray-code interpretation. If the clock timing or bit order is wrong, the encoder may transmit a stable data stream while the controller calculates the wrong absolute position.

The second limit is AX mechanical installation. The ø16 mm shaft must match the H7 adapter bore without forcing the clamp, and the locking ring must remain on the encoder side. Shaft runout, excessive clamp force, or torque-arm preload can create bearing load, housing movement, or repeatability drift.

The third limit is the AX operating envelope. The adapter is rated IP64 and has temperature-dependent speed limits. High shaft speed, high ambient temperature, or a loaded torque arm can become the practical failure boundary even when the SSI signal remains electrically stable.

Wiring & Installation

Before replacement, record the SSI clock/data wiring, supply voltage, ground, shield connection, bit length, code type, counting direction, preset value, and any setting-button or LED diagnostic behavior used by the machine. Also record the radial M23 connector pin assignment before removing the existing encoder.

During installation, confirm the ø16 mm H7 shaft fit, keep the locking ring on the encoder side, and align the 70 mm torque arm without preload. Route SSI and power cables away from inverter output wiring, maintain shield continuity through the M23 connector, and avoid ground loops between the encoder housing, machine frame, and cabinet earth. After startup, verify absolute position value, direction, repeatability, preset response, and stable data reading over several machine cycles.

Custom Compatible Solution

EncoderWorks can configure the replacement around the installed shaft and SSI control system:

• Match the AX ø16 mm hollow-shaft adapter, encoder-side locking ring, 70 mm torque arm, and mounting envelope
• Preserve Sendix F5863 SSI Gray-code feedback, 13-bit singleturn plus 12-bit multiturn scaling, and controller data interpretation
• Adapt the radial M23 connector layout, 10–30 VDC supply range, SSI clock/data wiring, and shield grounding
• Review clamp torque, shaft fit, torque-arm preload, IP64 installation limits, and temperature-speed operating margin

Key Data