HEIDENHAIN ROD 426 2500 pulses Encoder 02S12-03

Buy online your HEIDENHAIN ROD 426 2500 pulses Encoder 02S12-03 reference ROD426-2500 from our US e-store Cnc-shopping USA, specialist in CNC machine-tools spare parts.

This HEIDENHAIN incremental rotary encoder from the ROD 426 family delivers 2500 pulses per revolution for closed-loop motion feedback on CNC axes and industrial equipment. It is commonly used as a drop-in replacement unit on servo motors and measurement fixtures where reliable incremental feedback is required for position and speed control on machine-tools and automated systems.

The unit features a 6 mm stub shaft and is supplied with the cable and mating connector for straightforward field replacement. The 02S12-03 build code and HEIDENHAIN Id.Nr 376846 / 376846-e8 align with widely used ROD 426 variants found on legacy and mid-generation CNC installations. It supports quick restoration of encoder feedback without reengineering the system interface when replacing an existing ROD 426 with the same specification.

In day-to-day CNC service, this encoder fits servo feedback loops on feed axes, indexing devices and general rotary position tasks. The 2500 ppr line count is often required by older drives and control inputs that expect this specific resolution. With its compact shaft format and included connectorized cable, technicians can complete a clean swap on the production floor and bring the axis back online fast.

Compatibility is straightforward for machines already equipped with ROD 426. This version is noted to replace earlier ROD 426 iterations using a 12-pin connection, provided the original unit shares the same variant coding. Always confirm the nameplate code and interface requirements on your current encoder or maintenance records before ordering a replacement.

Reference: ROD426 2500

Manufacturer: HEIDENHAIN

Product type: HEIDENHAIN Encoder

Main function: Incremental rotary feedback for servo positioning and speed control

Applications: CNC axis feedback on machine-tools, servo motor retrofits, positioning fixtures, and general industrial measurement where a 6 mm shaft and 2500 ppr are required

Key technical data: Incremental model ROD 426, 2500 pulses/rev, 6 mm stub shaft, includes cable and mating 12-pin connector, noted as compatible with previous ROD 426 versions using the 12-pin interface, HEIDENHAIN Id.Nr 376846 / 376846-e8, listed for shipment within 3 days depending on availability

Maintenance teams often keep a stocked spare of this encoder to manage unplanned failures on aging axes. For planned overhauls and retrofit work, matching the 2500 ppr resolution helps maintain drive tuning and scaling factors. Using a like-for-like ROD 426 keeps wiring, couplings and feedback parameters stable, which reduces commissioning time after a field replacement.

Each unit is checked on appropriate CNC encoder test benches and simulators by skilled engineers, verifying signal quality and proper operation before dispatch. Supplied in secure industrial packaging and backed by a warranty for professional use. Many stocked items ship directly from our Florida facility. Most products are shipped from our Florida warehouse unless otherwise specified on the product page.

For emergency breakdowns this encoder is a practical spare part to reduce downtime on older machines. Cnc-shopping USA can assist with obsolete part sourcing, and repair or exchange service may be possible for selected HEIDENHAIN models to keep legacy CNC equipment operational.

Frequently asked questions about ROD426-2500:

Does this unit replace older ROD 426 encoders with a 12-pin connector?
Yes. This version is indicated to replace previous ROD 426 models that use the 12-pin interface, provided the original variant matches the 02S12-03 specification and signal requirements.

What is the pulse count and why does it matter?
It provides 2500 pulses per revolution. Many legacy drives and control inputs are scaled for this resolution, so keeping the same ppr helps preserve axis calibration and control behavior after replacement.

What shaft size and coupling are required?
The encoder has a 6 mm stub shaft. Use a compatible flexible coupling or the motor manufacturer’s recommended coupling to connect to the drive shaft. Verify runout and alignment during installation.

Is the cable and mating connector included?
Yes, the encoder is supplied with the cable and mating 12-pin connector for direct connection to your motor or measurement system when replacing a like-for-like ROD 426.

How can I confirm interface compatibility?
Match the complete code printed on your current encoder’s nameplate, including 02S12-03 and the Id.Nr 376846 / 376846-e8. If these details align, this unit is typically a suitable drop-in replacement.