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Product description

Heidenhain 639953-08 is a graduation drum from the ERA 180 series for modular angle encoders without integral bearings. Its optical graduation comprises 9,000 lines on a precision-machined steel cylinder with a nominal diameter of 180 mm. Combined with a compatible scanning head, the system produces a 1 Vpp sinusoidal analogue signal from a 63 μm graduation. The stated angular accuracy is ±3.0 arcseconds, supporting demanding position measurement in machine tools, machining centres, swivel tables and rotary tables. The associated measuring system uses a DC 5 V ±10 % supply. The drum outside diameter is approximately 250 mm. One analogue reference mark provides a reproducible zero position for each revolution. The permitted operating-temperature range is -10 °C to +80 °C. Without an additional protective cover, the assembly carries an IP 20 rating. The 639953-08 is supplied as the individual graduation-drum component for an existing ERA 180 measuring system and can be used for replacement or extension where the mechanical and signal interfaces match. The item is listed as used and originates from industrial stock. Available directly from our warehouse in Germany.

Heidenhain 639953-08

Specifications

Manufacturer Heidenhain
Product series ERA 180 series
Type code 639953-08
Measurement procedure Incremental optical angle measurement
Line count 9,000 lines
Grid division 63 μm
Accuracy ±3.0" (arcseconds)
Signal output 1 Vpp (analogue sinusoidal)
Supply voltage DC 5 V ±10 %
Reference mark 1 analogue reference mark
Drum diameter Ø 180 mm
Outer diameter Approx. 250 mm
Working temperature -10 °C up to +80 °C
Storage temperature -30 °C up to +80 °C
Protection rating IP 20
Cooling method Natural convection
Weight Approx. 0.5 kg
Control cabinet with PLC modules and automation components
Machine downtime in a production environment

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Product safety

Manufacturer / EU responsible person

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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