What Is the SICK KUP-1010-J Claw Coupling?

The SICK KUP-1010-J is a claw (jaw) shaft coupling with a blue polyurethane damping element, designed to link an encoder shaft to a drive shaft. It features 10 mm bores on both the encoder side (D1) and drive side (D2), and it handles a maximum speed of 19,000 rpm. This coupling is part of SICK's shaft adaptation series and is built for demanding environments where reliable motion feedback is mission-critical.

Engineers specifying This unit get a compact, field-proven component that compensates for misalignment while transmitting torque. The aluminum flange and 80 Shore polyurethane element work together to damp vibrations and protect the encoder from shock loads. Because the coupling is an accessory for SICK encoders, it is often selected during servo motor replacement or VFD replacement projects where maintaining accurate speed and position feedback is essential.

Key Features and Technical Specifications

• Bore diameter (encoder side, D1): 10 mm
• Bore diameter (drive side, D2): 10 mm
• Coupling type: Claw coupling
• Material: Aluminum flange, polyurethane damping element (80 Shore, blue)
• Nominal torque: 8 N·m maximum (800 Ncm per datasheet)
• Max. speed: 19,000 rpm maximum; max. angle of twist 10°
• Operating temperature: –30 °C to +80 °C (per datasheet)
• Axial offset compensation: max. ± 1 mm
• Radial/angular offset compensation: max. radial offset ± 0.22 mm; max. angular offset ± 1.3°
• Fastening: Socket set screws per ISO 4029; tightening torque 150 Ncm maximum
• Dimensions: 28.5 mm overall length (J family); outer diameter not available in datasheet

The 80 Shore polyurethane element is a distinctive feature: it provides effective vibration damping without sacrificing torsional stiffness. This matters in oil and gas applications where pumps, compressors, and motors generate constant vibration that can degrade encoder bearings and signal quality. Additionally, the wide operating temperature range of –30 °C to +80 °C ensures dependable performance in both hot process areas and cold outdoor installations.

How to Evaluate This unit for Your Application

When selecting a coupling for encoder feedback, engineers should verify three critical parameters: bore size, torque capacity, and misalignment tolerance. This unit offers 10 mm bores on both sides, making it suitable for shafts of that diameter. Its 8 N·m torque capacity is adequate for most encoder drive trains, where torque loads are typically low. However, for high-torque applications, verify that the maximum torque is not exceeded.

Misalignment compensation is another key factor. The coupling accommodates up to ±1 mm axial offset, ±0.22 mm radial offset, and ±1.3° angular offset. These values allow for minor installation imperfections and thermal expansion, reducing stress on encoder bearings. In rugged oil and gas environments, this flexibility extends service life and prevents premature failure.

Speed rating is equally important. With a maximum speed of 19,000 rpm, This unit suits high-speed motors and generators. The maximum angle of twist of 10° indicates the torsional flexibility of the damping element, which helps absorb shock loads. For applications requiring precise position feedback, ensure that the twist does not introduce unacceptable phase lag.

Installation and Setup Guidance

Proper installation is critical to coupling performance and encoder reliability. First, align the encoder and drive shafts as closely as possible before mounting the coupling. Although the coupling compensates for misalignment, excessive offset will reduce service life. Second, slide the coupling onto both shafts and secure it with the socket set screws per ISO 4029. Tighten the screws to a maximum torque of 150 Ncm using a calibrated torque wrench. Over-tightening can damage the aluminum flange or strip the screw threads.

After installation, rotate the assembly by hand to check for binding or excessive play. Verify that the coupling does not contact any surrounding components. Because the coupling operates in demanding environments, inspect the polyurethane element periodically for signs of wear, cracking, or discoloration. Replace the coupling if the damping element shows significant degradation.

Maintenance and Reliability in Harsh Conditions

This unit is engineered for reliability you can depend on in demanding environments. Its aluminum flange resists corrosion, while the polyurethane element withstands oils, greases, and many industrial chemicals. In oil and gas facilities, periodic inspection is recommended to detect wear from continuous vibration and temperature cycling. Check the set screws for tightness and look for any signs of fatigue in the damping element.

Because the coupling is a wear item, maintaining a spare on hand minimizes downtime during servo motor replacement or VFD replacement projects. PetroPartsOnline supplies genuine SICK components to keep critical operations running. For parts suited to your application's requirements, contact PetroPartsOnline.

Frequently Asked Questions

What is the maximum speed of the SICK unit?

The SICK unit has a maximum speed of 19,000 rpm, making it suitable for high-speed encoder applications.

Can This unit compensate for shaft misalignment?

Yes, it compensates for up to ±1 mm axial offset, ±0.22 mm radial offset, and ±1.3° angular offset.

What is the operating temperature range of this coupling?

The operating temperature range is –30 °C to +80 °C per the datasheet.

Is This unit suitable for servo motor replacement projects?

Yes, it is commonly used in servo motor replacement and VFD replacement projects to maintain accurate encoder feedback.

What tightening torque should be used for the set screws?

Tighten the socket set screws to a maximum of 150 Ncm.

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