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Product description

Heidenhain 390925-02 is a graduation drum with a centring collar from the ERM 200 series. It is the passive measuring standard for a modular, bearingless, magnetoresistive angle encoder used on hollow-shaft axes, rotary tables and machine-tool drives. The drum is mounted directly on the rotating axis and works with the matching scanning head to provide incremental angular-position signals to the CNC control. A graduation of 1024 lines per revolution and a 395 µm graduation period provide the basis for angular measurement. The documented graduation accuracy is ±7.0 arc seconds. Mechanical dimensions are 128.75 mm outside diameter, 80.0 mm inside diameter and a 95.0 mm pitch-circle diameter. These dimensions must be matched precisely to the existing axis and scanning-head arrangement. The magnetoresistive measuring principle is intended for demanding machine environments where coolant, oil, metal chips and vibration may occur. An integrated reference mark permits repeatable zero-position referencing after the machine is restarted. The maximum permissible operating speed is 13,000 min⁻¹, and the working-temperature range extends from −20 up to +100 °C. The measuring body is rated IP67. The ERM-200 architecture uses a separately mounted measuring drum and scanning head; the ERM-200 measuring system must be assigned by its complete identification data. Compatibility within the ERM 200 family still depends on the complete identification number. This Heidenhain 390925-02 is new and supplied in its original packaging from stock in Germany.

Heidenhain 390925-02 ERM 200 graduation drum

Specifications

Manufacturer Heidenhain
Product series ERM 200
Manufacturer/Order/Identification number 390925-02
Equipment type Graduation drum with centring collar
Scanning principle Magnetoresistive, incremental
Line count 1024 lines per revolution
Graduation period 395 µm
Graduation accuracy ±7.0 arc seconds
Outside diameter 128.75 mm
Inside diameter 80.0 mm
Pitch-circle diameter 95.0 mm
Maximum speed 13,000 min⁻¹
Working temperature −20 to +100 °C
Protection rating IP67
Cooling method Passive (no active cooling)
Weight approx. 0.4 kg
Control cabinet with PLC modules and automation components
Machine downtime in a production environment

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Product safety

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FAQ

Frequently asked questions

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Is there a warranty?

Yes. We provide a 14-day functional warranty for used items. The component must be functional on arrival, and the warranty applies only while the warranty seal remains undamaged. If a fault occurs within 14 calendar days, please contact us in writing. Depending on availability, we will either provide a replacement or refund the full purchase price after the item has been returned. Further details are set out in the terms and conditions supplied with our quotation.

How quickly do you ship, and which shipping options are available?

We normally dispatch available items immediately and, in many cases, on the same working day. For urgent requirements or machine downtime, we will identify the fastest suitable option and can confirm a specific delivery window on request. Express shipping and collection from our premises are also possible by arrangement. We ship worldwide using reliable parcel and freight carriers; freight shipments may require additional preparation to ensure safe delivery.

Is there a guarantee?

Yes, we provide a 14-day functional guarantee for used items. This means the component must be operational when received.

Please note that the guarantee only applies when the warranty seal is undamaged.

If a defect occurs within 14 calendar days, please contact us in writing. Subject to availability, we will provide a replacement or refund the full purchase price after return.

Further details are provided in the terms and conditions supplied with your quotation.

How quickly do you dispatch and which shipping options are available?

We generally dispatch immediately - in many cases on the same working day. For particularly urgent requirements or machine downtime, we find a suitable solution as quickly as possible and provide a specific delivery window on request.

Express shipping or collection from our premises is also possible, depending on the situation. State your requirements during the ordering process or contact us directly.

We ship worldwide and work with reliable shipping partners, from parcel services to freight forwarding. Freight shipments normally require some preparation so the goods arrive safely and undamaged.

Which payment methods are available?

Payment is normally made by bank transfer against invoice. Payment is due within 10 calendar days of receiving the goods.

As a rule, we offer purchase on account for all customers. In individual cases, such as new customers or particularly high-value components, we may agree advance payment. This decision is made individually and communicated transparently.

Can we return items if they were ordered incorrectly?

Because we sell exclusively to business customers (B2B), there is no general right of return and no consumer right of withdrawal.

Please note that returns of functioning goods are generally excluded. In justified exceptional cases, we can assess an individual solution, but this is not the standard procedure.

Is there a discount when ordering several items?

For larger order quantities or several items of one type, we can offer individual discounts.

Simply send us a quick enquiry - we check availability and will gladly prepare a tailored quotation with quantity pricing.

Do you also purchase industrial spare parts?

Yes, we also purchase automation components, such as frequency inverters, PLC assemblies, panels, servo motors and CPUs. Components from Siemens, Lenze, Schneider Electric, Control Techniques or Heidenhain are especially sought after, and other brands are also possible.

The process is straightforward: email us an inventory list or overview photos at info@reha-industriekomponenten.de. We calculate a market-based purchase price and send you an offer.

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