HEIDENHAIN Encoder ROD426.000B-1000-ID295434EV

HEIDENHAIN ROD426.000B-1000-ID295434EV is an incremental rotary encoder belonging to the ROD400 series solid-shaft encoders. The ID code 295434EV is its unique product identification number.

2. Model Parameter Breakdown

3. Key Technical Specifications

4. Product Features & Applications

Core Features

1. Independent bearing design: Built-in precision bearings, independent of the measured shaft for support
2. Shaft coupling compensation: Connected via dedicated coupling to compensate axial movement and radial/angular misalignment
3. High reliability: Fully sealed structure, IP64 protection, suitable for harsh industrial environments
4. Signal quality: TTL push-pull output with strong anti-interference performance, ideal for high-speed motion control

Typical Applications

Servo motor feedback systems

Spindle position detection in CNC machine tools

Transmission control in automated production lines

Speed and position feedback for printing, woodworking and textile machinery

Robot joint motion control

5. Ordering & Replacement Information
6. Precise ordering: Contact an authorized HEIDENHAIN distributor using the full model “ROD426.000B-1000” or ID code “295434EV”
7. Replacement compatibility: Mechanically interchangeable with other line-count versions of the ROD426 series (e.g. 2000 lines), differing only in electrical parameters
8. Notes: Use a dedicated coupling during installation to ensure concentricity and avoid excessive bearing load that shortens service life
9. Additional Notes

This model is a standard HEIDENHAIN ROD426 series product, not custom-made

For higher resolution, alternatives include 2000-line, 2048-line versions and others

For different output signals (e.g. 1 Vpp sine wave or HTL), consider the ROD486 (1 Vpp) or ROD436 (HTL) series

Coupling Selection & Installation Guide for HEIDENHAIN ROD426.000B-1000-ID295434EV

1. Officially Recommended Coupling Models

For HEIDENHAIN ROD426 series encoders (solid shaft, diameter 6 mm), the officially specified couplings are:

Key Selection Criteria

1. Matching bore diameter: Both ends must be 6 mm (consistent with encoder shaft diameter)
2. Recommended length: 20–30 mm (avoid insufficient torsional stiffness from excessive length)
3. Connection type: Clamping type (recommended) or set-screw type (ensure no damage to encoder shaft)
4. Material: Aluminum alloy (lightweight, good heat dissipation) or stainless steel (high strength, corrosion resistance)
5. Coupling Installation Procedure

2.1 Preparation

Clean the encoder shaft and motor shaft, removing oil, burrs and rust

Prepare appropriate tools (torque wrench, dial indicator, cleaning agent)

Check flatness of encoder flange and mounting base (flatness error ≤ 0.02 mm)

2.2 Installation Flow

1. Mount the encoder

Secure the encoder synchronous flange (Ø58 mm) to the equipment end cover using 3 M4 bolts at a torque of 1.5 Nm

Ensure tight, gap-free contact between flange and mounting base

2. Install the coupling

First mount one end of the coupling onto the motor shaft and pre-tighten clamping bolts (torque 0.8–1.2 Nm)

Align the two shafts by adjusting the motor/encoder position, then attach the other end to the encoder shaft

Tighten all clamping bolts evenly and symmetrically to the torque specified in the coupling manual

3. Concentricity calibration (critical step)

Measure radial runout (≤ 0.03 mm) and axial play (≤ 0.02 mm) using a dial indicator

Angular misalignment must be limited to ≤ 0.5° (disk coupling) or ≤ 1.0° (Oldham coupling)

Adjust motor position until the above accuracy is achieved

3. Critical Installation Notes (Key Limits)

Important Warnings

1. Rigid connection is forbidden: Always use a flexible coupling. Never directly rigidly connect the encoder shaft to the motor shaft.
2. Shaft load limits: Maximum permissible radial load 10 N, axial load 5 N; exceeding these will damage bearings.
3. Installation sequence: Mount the encoder flange first, then the coupling, then calibrate concentricity. Reverse order is strictly forbidden.
4. Protection: Install a protective cover after mounting to prevent dust and oil ingress and maintain IP64 rating.
5. Maintenance & Troubleshooting

4.1 Routine Maintenance

-Regularly check coupling bolt tightness (every 3 months)

Clean encoder housing to avoid poor heat dissipation

Monitor encoder output signals; inspect coupling if abnormalities occur

4.2 Common Faults & Solutions

5. Selection Advice & Alternatives

Recommendations by Application

High-precision positioning: Prefer original HEIDENHAIN K17 disk coupling for maximum accuracy and stability

High-speed rotation (>8000 rpm): Recommended Oldham coupling (e.g. CPG series) with low shaft reaction force to protect encoder bearings

Harsh environments: Stainless steel couplings for improved corrosion resistance

Cost-sensitive projects: High-quality domestic 6 mm × 6 mm disk couplings with performance close to original parts

Complete List of HEIDENHAIN Encoders

1. Encoder Classification Overview

HEIDENHAIN encoders are mainly divided into three categories: rotary encoders (with built-in bearings / separate bearings), angle encoders (modular / enclosed), and linear encoders (sealed / open), used for position and speed feedback in various industrial scenarios.

2. Rotary Encoder Series List

2.1 Rotary Encoders with Separate Bearings (Require Independent Shaft Coupling)

Detailed Specifications of ROD426.000B-1000-ID295434EV:

Line count: 1000 lines/rev, 1000 pulses

Shaft diameter: 6mm solid shaft, length 9.5mm

Flange: Ø58mm synchronous flange, centering ring 50mm

Signal: TTL push-pull output (3 phases A, B, Z)

Power supply: 5V±10% DC, max scanning frequency 300kHz

Protection class: IP64, operating temperature -40°C to +100°C

Connection: M23 connector, 12 pins, weight approx. 0.42kg

2.2 Rotary Encoders with Built-in Bearings (With Stator Coupling)

2.3 Inductive Rotary Encoders

3. Angle Encoder Series List

3.1 Modular Angle Encoders

3.2 Enclosed Angle Encoders

4. Linear Encoder Series List

4.1 Sealed Linear Encoders

4.2 Open Linear Encoders

5. Key Parameter Comparison Table for Encoder Selection

6. List of Couplings Suitable for ROD426 (User Priority)

7. Ordering and Replacement Guide
8. Precise Ordering: Contact an authorized HEIDENHAIN distributor using the full model (e.g., ROD426.000B-1000) or ID number (e.g., 295434EV).
9. Series Compatibility: ROD400 series share the same mechanical dimensions and differ only in electrical parameters, allowing interchangeable installation.
10. Replacement Suggestions:

Incremental to Absolute: ROD series → ROC/ROQ series

TTL to 1Vpp: ROD426 → ROD486

Higher protection: Standard type → Enhanced sealed type (IP67)

 Cross-Brand Model Cross-Reference for HEIDENHAIN Encoders

(ROD426.000B-1000-ID295434EV)

Cross-Reference Table for Replacement Models of Major Brands

1. Pepperl+Fuchs

2. Hengstler

3. Baumer

4. SICK

5. Omron

6. Keyence

7. Other Brands

Key Notes for Replacement Selection

1. Mechanical Compatibility Priorities
2. Shaft diameter and length: Must strictly match 6 mm × 9.5 mm, otherwise coupling installation will be difficult or bearings may be damaged
3. Flange dimensions: Verify centering ring diameter (50 mm) and mounting holes (3×M4 on Ø42 mm circle)
4. Housing diameter: Ø58 mm is standard; ensure sufficient installation space
5. Electrical Parameter Matching

3. Installation and Application Recommendations
4. Coupling selection: All replacement models require 6 mm × 6 mm flexible couplings (e.g. HEIDENHAIN K17 or equivalent)
5. Concentricity calibration: After installation, radial runout ≤ 0.03 mm and angular misalignment ≤ 0.5° must be verified
6. Protection: Ensure replacement model has IP ≥ IP64; IP65/IP67 recommended for harsh environments
7. Signal testing: After replacement, perform signal integrity test to ensure no pulse loss or interference

Recommended Best Replacements

Important Note: Before formal use, all replacement models are recommended to undergo mechanical fitting and electrical compatibility verification to ensure perfect matching with the original system. For critical applications, contact the brand’s technical support for professional selection guidance.