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Professional Article: Dunkermotoren further develops the product line of brushed DC motors

After the GR 80 series had already been optimized in 2019, the GR 42, GR 53 and GR 63 series will follow, which will offer up to 10% more continuous torque and a more corrosion-resistant surface.

Professional Article: Dunkermotoren further develops the product line of brushed DC motors

In Dunkermotoren's case, the designation GR stands for brushed DC motors with permanent magnetic excitation.

In order to improve heat dissipation, a black-coated housing is used. The current housing is galvanized and the colour is silver. By using the black housing tube, an increase in performance is achieved without changing the course of the motor characteristic curve. Only the nominal point is shifted. Thus, a higher torque is possible and the resulting output power increases.

With the previous galvanic surface coating of the GR 80, it was not possible to meet the requirements of the railway industry for corrosion protection and the hygiene requirements of the food industry. For some time now, housings with KTL coating (cathodic dip coating) have been used for such applications as a special solution. This has passed the salt spray test according to DIN EN ISO 9227 for 192 hours with flying colors. As a result of the conversion, the requirements for corrosion protection and in sub-areas of hygiene will be covered by all sizes of the GR series in future. In order to make this technology available to all customers, the type of coating will be transferred to the generic products and successively presented accordingly in the sales documents.

As a result of this measure, the GR product line is optimally equipped for the future and should continue to enjoy increasing popularity among our customers. All GR motors with nominal voltages ≤ 60 V are affected by the change. The change will be cost-neutral for Dunkermotoren customers.

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