For 8.H120.4351.1024, EncoderWorks can provide a custom compatible replacement focused on 10–30 V push-pull receiver matching, 1024 PPR scaling, Ø20 mm through-hollow-shaft fit, and 150 mm torque-arm installation. This model should not be treated like the Ø16 or Ø25 bore versions. The shaft fit, torque-arm geometry, radial cable assignment, and A/B/0 inverted-channel mapping must remain consistent with the original machine.
The 8.H120.4351.1024 is a heavy-duty optical incremental hollow-shaft encoder configuration with 1024 PPR, push-pull output with inverted signals, 10–30 VDC supply, Ø20 mm through hollow shaft, 150 mm torque arm, and radial 1 m PVC cable connection. The controller must keep the same quadrature mode, reference-pulse logic, and 1024 PPR scaling.
The first failure boundary is push-pull signal integrity. A, B, 0 and inverted A/B/0 must be wired by function. If receiver threshold, shield grounding, cable routing, inverted-channel mapping, or reference-pulse handling is wrong, the controller may see switching signals while still losing counts, reading the wrong direction, or missing the zero pulse.
This replacement fails when A/B/0 signals are present, but the controller loses counts or reads the wrong motion value because push-pull output behavior, 1024 PPR scaling, cable shielding, inverted-channel mapping, or reference-pulse handling does not match the original encoder.
The second boundary is heavy-duty through-shaft mechanics. The Ø20 mm bore, 150 mm torque arm, clamp-ring torque, shaft fit, radial load, axial load, IP67 sealing, and cable strain must be checked together. The torque arm should prevent housing rotation without forcing radial or angular preload into the bearing system.
The replacement decision should first confirm 1024 PPR scaling, 10–30 V push-pull receiver compatibility, A/B/0 plus inverted channel mapping, 300 kHz frequency margin, radial 1 m cable assignment, Ø20 mm through-hollow-shaft fit, 150 mm torque-arm geometry, clamp-ring tightening, IP67 sealing, shield grounding, cable routing, and shaft-load limits. EncoderWorks treats 8.H120.4351.1024 as an industrial encoder custom compatible solution where push-pull signal integrity and Ø20 hollow-shaft installation decide field reliability.
Typical production lead time: 15 working days.
Key Data
| Item | Data |
|---|---|
| Model | 8.H120.4351.1024 |
| Encoder type | Heavy-duty incremental hollow-shaft encoder |
| Detection type | Optical |
| Pulse count | 1024 PPR |
| Output circuit | Push-pull with inverted signals |
| Signal output | A, B, 0 and inverted A, B, 0 |
| Supply voltage | 10–30 VDC |
| Max pulse frequency | 300 kHz |
| Shaft type | Through hollow shaft |
| Shaft size | Ø20 mm |
| Mounting | 150 mm torque arm |
| Connection | Radial PVC cable |
| Cable length | 1 m |
| Protection class | IP67 |
| Main engineering anchor | Push-pull output and Ø20 hollow shaft |
| Main failure boundary | Wrong channel mapping, receiver mismatch, scaling error, torque-arm preload |
