KTR 72 POLY NORM Naaf AR90 GJL 1.0 65mm

KTR POLY-NORM NAAF 90 Jaw Coupling Hub

Description

This is a POLY-NORM NAAF 90 jaw coupling hub from KTR, designed for fail-safe power transmission in demanding industrial applications. It is made from high-grade GJL cast iron and features a finished bore of 65 mm with a standard keyway. This component is essential for connecting shafts, compensating for misalignment, and damping torsional vibrations.

Specifications

• Manufacturer: KTR
• Product Series: POLY-NORM
• Hub Type: NAAF 90
• Material: GJL (Cast Iron)
• Bore Diameter: 65 mm
• Keyway: According to DIN 6885/1

Label Info

• Item Number: A0407950
• Full Description: KTR POLY-NORM NAAF 90 GJL AR 1.0 65 MM

Application

Ideal for use in general engineering, pumps, compressors, conveyors, and any machinery requiring a flexible and reliable shaft connection.

Country of Origin

Made in Germany.

CO2 Impact

By choosing this reused component, you are helping to avoid approximately 7.0 kg of CO2 emissions compared to purchasing a new one.

Availability

This item is in stock and ready for immediate dispatch. Order now from spareparts2day for expert support and fast delivery.

FAQ

What type of spider/element is compatible with this POLY-NORM 90 hub?

This hub requires a standard POLY-NORM 90 spider, typically made from Polyurethane. Different shore hardness levels (e.g., 92 Sh-A, 98 Sh-A) are available to adjust damping characteristics and torque capacity to suit the application.

Does this hub come with a keyway and set screw?

Yes, as a finished part (type 1.0), this hub includes a standard keyway according to DIN 6885/1 and is prepared for a set screw to securely fasten it to the shaft.

What is the maximum torque rating for a size 90 coupling?

The nominal torque for a complete POLY-NORM size 90 coupling depends on the elastomer spider used, but it is typically around 400 Nm. For precise values and peak torque limits, always consult the official KTR technical datasheet.

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Last Update: Friday, March 13, 2026