Ruland OD12/19-NL Oldham Coupling Disk, Nylon 11, Bore, 3/4″ or 19.1mm OD

Description

Product Overview

The Ruland OD12/19-NL Oldham Coupling Disk is engineered for demanding power transmission environments where precision, durability, and quiet operation are essential. Constructed from high‑performance Nylon 11, the disk offers excellent chemical resistance, low moisture absorption, and inherent vibration damping properties that help extend the life of connected equipment. Its zero‑backlash balanced design eliminates play between the hubs, ensuring smooth torque transfer even at high rotational speeds.

Measuring 0.75 inch (19.1 mm) in outer diameter, the disk fits a wide range of standard shaft sizes, providing flexibility for both metric and imperial applications. The proprietary hub machining process creates a perfectly smooth interface between the disk and the clamp or set‑screw hubs, reducing wear and allowing the coupling to operate reliably for years without the need for frequent maintenance or replacement.

Ruland’s Oldham coupling series is known for its ability to accommodate up to 10 % parallel misalignment relative to the hub outer diameter. This high tolerance makes the OD12/19‑NL model especially suitable for installations where shaft alignment can shift over time due to thermal expansion, load variations, or structural movement. The coupling also acts as a mechanical fuse, protecting downstream components by slipping under torque overload conditions.

Compliance with RoHS3 and REACH regulations underscores Ruland’s commitment to environmentally responsible manufacturing. The coupling’s lightweight construction—approximately one pound—facilitates easy handling and installation while still delivering the strength required for demanding industrial tasks.

Key specifications include a compact 3 × 0.7 × 0.5 inch form factor, a maximum operating speed of 4,500 RPM, and a robust design that can handle significant torque loads without compromising performance. Whether used in conveyor systems, pump drives, or other power transmission setups, this coupling provides a reliable, low‑maintenance solution.

Usage

Industrial facilities that rely on continuous operation—such as manufacturing plants, material handling centers, and water treatment facilities—benefit from the Ruland Oldham Coupling Disk’s ability to reduce vibration and noise. By minimizing mechanical shock, the coupling helps protect sensitive equipment like bearings, seals, and motor housings, leading to lower downtime and reduced maintenance costs.

In conveyor applications, the coupling’s capacity to absorb misalignment allows for longer belt runs and more flexible layout designs. This flexibility is especially valuable in retrofitting projects where existing shafts may not be perfectly aligned. The nylon construction also resists corrosion from exposure to chemicals, making it suitable for use in food processing, chemical handling, and pharmaceutical environments where hygiene and material compatibility are critical.

For pump drives, the coupling’s zero‑backlash feature ensures a steady flow rate and prevents pulsation, which can be detrimental to process stability. The ability to operate at speeds up to 4,500 RPM means the coupling can be paired with high‑speed motors without sacrificing performance, while the built‑in torque overload protection safeguards the pump and motor from sudden load spikes.

Maintenance technicians appreciate the ease of installation: the disk can be mounted using either a clamp or set‑screw hub, with options for keyed or keyless configurations. This adaptability simplifies inventory management and reduces the need for multiple part numbers, allowing service teams to quickly replace or upgrade couplings as needed.

Why Choose Us

Ruland has a long history of delivering high‑quality power transmission components, and the OD12/19‑NL coupling reflects decades of engineering expertise. Our proprietary hub machining process ensures a seamless fit between the disk and hub, which translates into longer service intervals and lower total cost of ownership for our customers.

We prioritize material selection, and Nylon 11 was chosen for its superior wear resistance, low friction coefficient, and excellent damping characteristics. This material choice not only improves operational smoothness but also contributes to a quieter work environment—an important factor in facilities where noise regulations are strict.

Our couplings are RoHS3 and REACH compliant, demonstrating our commitment to environmental stewardship and regulatory adherence. By choosing Ruland, you align your operations with a supplier that values sustainability and responsible manufacturing practices.

Customer support is a cornerstone of the Ruland experience. Our technical team is available to assist with sizing, installation guidance, and troubleshooting, ensuring that you get the most out of your investment. We also offer a comprehensive warranty that covers material defects, giving you confidence in the durability of the product.

Key Features

• Zero‑backlash design eliminates play for smoother torque transfer and reduced wear.
• High‑grade Nylon 11 construction provides excellent vibration damping and chemical resistance.
• Accommodates up to 10 % parallel misalignment, allowing flexible installation in misaligned shaft scenarios.
• Acts as a mechanical fuse, protecting downstream equipment from torque overloads.
• Dedicated technical support and warranty ensure reliable after‑sales service.

FAQ

What size shafts can the OD12/19‑NL coupling accommodate?

The coupling is designed for a 0.75 inch (19.1 mm) outer diameter hub, but it can be paired with a variety of clamp or set‑screw hubs that accept both metric and imperial bore sizes. This flexibility allows you to match the coupling to shafts ranging from small motor shafts to larger industrial shafts, provided the hub is compatible with the 0.75 inch disk.

Can the coupling be used in high‑temperature environments?

Nylon 11 maintains its mechanical properties up to approximately 180 °C (356 °F). For most industrial applications, including those involving moderate heat, the coupling performs reliably. If your operation exceeds this temperature range, we recommend consulting our technical support team to evaluate alternative materials or designs that meet higher temperature specifications.

How does the coupling protect equipment from torque overload?

The Oldham design inherently slips when torque exceeds the coupling’s rated capacity, acting as a mechanical fuse. This slip prevents excessive forces from being transmitted to the motor or driven equipment, reducing the risk of damage to bearings, seals, and other critical components. After an overload event, the coupling can be inspected and re‑installed without the need for replacement in most cases.

Is the coupling suitable for food‑grade or sanitary applications?

While the Nylon 11 material offers good chemical resistance, for strict food‑grade or sanitary requirements you should verify that the coupling meets the specific regulatory standards (such as FDA or USDA) for your application. Ruland can provide additional certifications or suggest alternative materials if needed to ensure compliance with sanitary guidelines.

What maintenance is required to keep the coupling operating optimally?

Maintenance for the OD12/19‑NL is minimal. Regular visual inspections for wear, cracks, or contamination are recommended. Ensure that the hub surfaces remain clean and free of debris before installation to maintain the smooth interface. Lubrication is generally not required due to the low‑friction nature of Nylon 11, but periodic checks of the surrounding equipment (bearings, seals) will help extend overall system life.