Encoders and feedback
Hengstler Encoders Supplier in Chennai: RI58 and RI76 Models
EKA CNC supplies Hengstler incremental encoders, including RI58 solid-shaft and RI76 hollow-shaft models, for machine tools and automation. Send the full type code from the encoder label and we will confirm price and availability.
- RI58 and RI76 models
- Matched by type code
- Tested before dispatch
- Pan-India shipping
Hengstler Incremental and Hollow-Shaft Encoders
Hengstler is a German manufacturer of industrial components for counting and control applications, and EKA CNC supplies its encoders from Chennai. Our range includes RI58 incremental encoders and RI76 hollow-shaft encoders. Hengstler also offers encoders for safety-related applications and digital interfaces with high data rates. Hengstler makes incremental encoders for a wide range of applications. With optical incremental encoders, a line-coded disc made of metal, plastic or glass and mounted on a rotary bearing interrupts a beam of light from a light-emitting diode. The interruptions of the light beam are sensed by the receptor element and electronically processed. The information is then made available as a rectangular signal at the encoder output. Hengstler rotary encoders are available with resolutions of up to 10,000 pulses per revolution.
EKA CNC is an independent reseller of Hengstler products, not an authorised dealer or distributor. Brand names are trademarks of their owners.
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Share the model or part number and quantity. Attach a nameplate photo or BOM on the quote form if you have one.
In this range
Hengstler Encoders Available from EKA CNC
Open a product for its specifications, or add several to one RFQ and send them together.
Hengstler Icuro RI76 Hollow Shaft Encoder
CURO RI76 Incremental • Through hollow shaft Ø 15 to 42 mm • Outer diameter only 76 mm • Easy to install thanks to…
Icuro RI58 Incremental Encoders
ICURO RI58 Incremental • Universal industrial rotary encoders • Up to 40,000 steps with 10,000 lines • High degree of…
Buyer guide
How to Identify a Replacement Hengstler Encoder
Hengstler encoders carry a type code on the label that defines the exact variant. Two encoders of the same series can differ in resolution, output and connection, so the full code matters more than the series name. Send a clear photo of the label. If it is missing, these details let us identify a match:
- Shaft: solid shaft (as on the RI58) or hollow shaft (as on the RI76), and the shaft or bore diameter.
- Flange: clamping flange, synchro flange or the type of torque arm on hollow-shaft models.
- Resolution: pulses per revolution.
- Output: TTL line driver (RS422) or HTL push-pull, and whether inverted signals are used.
- Supply voltage: commonly 5V DC or 10–30V DC.
- Connection: radial or axial cable or connector, and the connector type.
Matching output type and supply voltage is essential. A wrong combination can give no signal or damage the input on the controller.
Encoder Fault Symptoms and Checks
- Position drifts slowly over time: check the coupling or hollow-shaft clamp for slip before replacing the encoder.
- Random counting errors: often caused by electrical noise. Check that the cable is shielded, the shield is earthed correctly, and the cable is not run beside motor power cables.
- No signal on one channel: check the connector and the cable for damage near moving parts, then test the encoder output with a meter or oscilloscope.
- Noise or roughness when turning the shaft: worn bearings, often caused by misalignment or side load from a rigid coupling.
- Intermittent faults in a dirty or wet area: contamination entering the housing; check the IP rating suits the location.
If the encoder is confirmed faulty, send its type code so we can supply the same variant.
Faster quotations
What to Include in Your Enquiry
Send what you have. If a detail is unknown, say so and we will help identify it from a photo or the machine documentation.
- Full type code from the encoder label
- Photo of the label and the connector
- Shaft type and diameter, solid or hollow
- Pulses per revolution and output type
- Supply voltage and machine or controller make
- Quantity and delivery location
Buyer questions
Frequently Asked Questions
What is the difference between the Hengstler RI58 and RI76?
The RI58 is a 58 mm class incremental encoder with a solid shaft, mounted with a flange and connected through a coupling. The RI76 is a hollow-shaft encoder that slides directly over the motor or machine shaft and is held by a torque arm, so no separate coupling is needed. Choose based on how the encoder mounts on your machine.
Where do I find the encoder type code?
The type code is printed on the label on the encoder body, usually alongside the resolution and supply voltage. It may be a long string of letters and numbers. Send a clear photo of the whole label, as each part of the code defines a feature such as shaft size, output or connection.
Can I use a different resolution from my old encoder?
Only if the controller or drive is set up for the new value. Changing pulses per revolution without changing the parameter will give wrong speed or position readings. For a like-for-like replacement, always order the same resolution as the original.
What is the difference between TTL and HTL outputs?
TTL (RS422 line driver) outputs give 5V differential signals that resist noise well over long cables. HTL push-pull outputs swing close to the supply voltage, typically 10–30V, and suit PLC and counter inputs designed for 24V signals. The output must match the input of your controller or counter.
Do you supply Hengstler absolute encoders too?
Yes. Along with incremental encoders, we supply Hengstler absolute encoders for applications that must know their position at power-up. See our Hengstler absolute encoder page, or send the type code of your existing encoder and we will check the matching model.
How should a solid-shaft encoder be installed?
Use a flexible coupling between the encoder and the driven shaft, align the shafts as closely as possible, and avoid axial or side loads on the encoder bearings. Route the cable away from motor power cables and earth the shield as the controller manual specifies. A rigid connection can wear the encoder bearings quickly.
How do I get a quote for a Hengstler encoder?
Send the type code, a photo of the label, the quantity and the delivery location through the quote request form, by email or by phone. We will confirm price and availability, or suggest an equivalent if the exact variant is unavailable.
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