What the SICK KUP-1012-D Coupling Does

The SICK KUP-1012-D is a double-loop shaft coupling that connects an encoder to a drive shaft. It has a 10 mm bore on the encoder side and a 12 mm H8 bore on the drive side. The coupling handles up to 1.5 N·m of torque and 3,000 rpm maximum speed. For maintenance engineers, this coupling protects the encoder from misalignment and vibration in mission-critical machinery.

In oil and gas operations, encoders on motors, valves, and compressors must survive constant vibration and temperature swings. This unit uses a polyurethane damping element and a galvanized steel flange. This construction absorbs shock and compensates for shaft misalignment. As a result, the encoder stays accurate and the coupling reduces wear on both shafts.

Key Specifications of This unit

• Bore diameter (encoder side, D1): 10 mm
• Bore diameter (drive side, D2): 12 mm (H8)
• Coupling type: Double loop coupling
• Material: Polyurethane damping element, galvanized steel flange
• Nominal torque: 1.5 N·m maximum
• Max. speed: 3,000 rpm maximum
• Axial offset compensation: max. ± 3 mm
• Radial offset compensation: max. ± 2.5 mm
• Angular offset compensation: max. ± 10°
• Operating temperature: –30 °C to +80 °C (per datasheet)
• Dimensions: 35 ± 2 mm length × Ø 38 ± 1 mm outer diameter

The polyurethane element is the key to the coupling's damping performance. It absorbs vibration that would otherwise reach the encoder bearings. The galvanized steel flange provides a rigid mounting surface. Together, these materials let the coupling tolerate axial, radial, and angular misalignment without losing torque transmission. For a maintenance engineer, this means fewer encoder failures and longer service intervals.

Why This unit Suits Oil and Gas Applications

Oil and gas equipment operates in harsh conditions. Temperature extremes, vibration, and contamination are common. This unit is rated for –30 °C to +80 °C, so it can handle both cold outdoor installations and hot process areas. The double-loop design compensates for shaft misalignment that occurs from thermal expansion or foundation settling. This capability reduces stress on the encoder and extends its life.

In a typical application, an encoder mounts on a motor shaft to provide speed feedback to a VFD. The coupling must transmit torque without backlash while absorbing vibration. This unit's polyurethane element damps vibration and its double-loop geometry allows for misalignment. As a result, the encoder signal remains stable and the VFD can control the motor accurately. This reliability is essential for mission-critical processes such as pipeline pumping or compressor control.

Installation and Maintenance Guidance

Proper installation ensures the coupling performs as designed. First, verify that the shaft diameters match the bore sizes: 10 mm on the encoder side and 12 mm on the drive side. Clean the shafts and bores before assembly. Then, slide the coupling onto the shafts and secure it according to the encoder manufacturer's instructions. Because the clamping screw specification is not available, refer to the official SICK datasheet for fastening details.

After installation, check the alignment. The coupling can compensate for axial offset up to ±3 mm, radial offset up to ±2.5 mm, and angular offset up to ±10°. However, keeping misalignment within these limits ensures maximum service life. During routine maintenance, inspect the polyurethane element for cracks, wear, or softening. Also check the galvanized steel flange for corrosion or looseness. If the element shows signs of degradation, replace the coupling to avoid encoder damage.

Because the operating temperature range is –30 °C to +80 °C, ensure the coupling is not exposed to temperatures outside this range. In hot areas, consider shielding or ventilation. In cold areas, verify that the polyurethane remains flexible. Regular inspection intervals should be based on the duty cycle and environmental conditions. For critical applications, schedule inspections more frequently.

Frequently Asked Questions

What is the maximum speed of the SICK unit?

The SICK unit has a maximum speed of 3,000 rpm. This limit ensures the polyurethane damping element and steel flange operate within their design parameters. Exceeding this speed may cause vibration or premature wear.

Can This unit compensate for shaft misalignment?

Yes. The double-loop design allows axial offset up to ±3 mm, radial offset up to ±2.5 mm, and angular offset up to ±10°. These compensations protect the encoder from stress caused by misalignment.

What is the operating temperature range of this coupling?

The operating temperature range is –30 °C to +80 °C per the datasheet. This range covers many oil and gas environments, but verify that your application stays within these limits.

Is This unit suitable for servo motor replacement?

This unit is an encoder coupling, not a servo motor. However, it can be used in servo systems to connect an encoder to a motor shaft. For servo motor replacement, consult PetroPartsOnline for compatible parts.

Where can I find more information about This unit?

Refer to the official SICK datasheet for detailed specifications. For application-specific selection guidance or to verify current lifecycle status and availability, contact PetroPartsOnline.

Ordering and Support

The SICK unit is available from PetroPartsOnline. Our team provides reliable sourcing for critical operations and application-specific selection guidance. Contact PetroPartsOnline for parts suited to your application's requirements.

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