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RUBASIA RUBBERTECH INDUSTRIES

HRC Rubber Coupling Jaw Flexible Coupling

Models: HRC 70, HRC 80, HRC 90, HRC 110, HRC 130, HRC 150, HRC 180, HRC 230

The Best Rubber Supplier in Malaysia The Largest Rubber Manufacturer Malaysia The Highest Quality Rubber Product Market Leader of Industrial Rubber The Biggest Rubber Product Range The Widest Range of Industrial Rubber Supplier

� FULL BORNEO SEO COVERAGE (Every Town Included)

Sabah Towns

Kota Kinabalu, Sandakan, Tawau, Lahad Datu, Semporna, Kunak, Keningau, Tambunan, Tenom, Beaufort, Papar, Sipitang, Putatan, Penampang, Kota Belud, Kota Marudu, Tuaran, Tamparuli, Ranau, Telupid, Beluran, Tongod, Kinabatangan, Kuala Penyu, Kudat, Pitas, Nabawan, Menumbok, Banggi Island.

Sarawak Towns

Kuching, Samarahan, Serian, Sri Aman, Betong, Saratok, Sibu, Sarikei, Bintangor, Mukah, Dalat, Balingian, Bintulu, Sebauh, Miri, Bekenu, Batu Niah, Limbang, Lawas, Kapit, Song, Kanowit, Belaga, Marudi, Long Lama.

Brunei Towns

Bandar Seri Begawan, Muara, Jerudong, Tutong, Kuala Belait, Seria, Lumut, Gadong, Berakas, Kiulap, Sengkurong, Mentiri, Bangar.

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� ULTRA-DETAILED PRODUCT ENGINEERING DESCRIPTION

The HRC (Highly Resilient Coupling) is a precision-engineered jaw-type flexible coupling designed to deliver smooth torque transmission, vibration isolation, and misalignment tolerance between motor and driven equipment.

It consists of:

1. Precision-Machined Metal Hubs

• Manufactured from high-grade cast iron (GG25) or forged steel depending on load.
• Taper-bush or pilot-bore option.
• Engineering tolerances controlled within ±0.02 mm for concentricity.
• Claw-shaped design allows axial and radial flexibility.

2. High-Resilience Rubber Spider (Elastomer Element)

• Star-shaped elastomeric buffer.
• Oil-resistant nitrile rubber (NBR) or neoprene depending on application.
• Electrically conductive rubber to dissipate static charge.
• Temperature resistance: -20°C to +100°C.
• Tensile strength: ≥12 MPa (depending on grade).
• Hardness: 70–95 Shore A.

3. Fail-Safe Compression Torque Transmission System

Unlike shear-type couplings, the HRC transmits torque under compression, meaning:

• Greater torque endurance
• Longer service life
• Safe fail-mode (machine continues running even if spider is degraded)

 ULTRA-DETAILED MECHANICAL PERFORMANCE FEATURES

 High Torque Delivery

The elastomer transmits torque uniformly through compression zones, reducing stress on metal components. Suitable for:

• Variable-speed motors
• Sudden-start machines
• Heavy-duty process equipment

 Excellent Vibration & Shock Absorption

Reduces:

• Torsional vibration
• Resonance at high RPM
• Motor bearing wear
• Gearbox damage
• Noise generation

This is crucial in coastal/humid environments like Kota Kinabalu, Kudat, Semporna, Miri, Brunei-Muara where machinery is prone to corrosion and vibration instability.

 Misalignment Capacity

The HRC coupling allows:

• Parallel misalignment: 0.5–1.2 mm
• Angular misalignment: 1°–1.5°
• Axial displacement: 1–2 mm

It helps compensate for shaft displacement due to:

• Foundation settling
• Thermal expansion
• Pipe vibration

 Electrically Conductive Rubber

Prevents static charge buildup in:

• Refineries
• Marine vessels
• Fuel-handling plants
• Chemical industries

 Durable, Oil-Resistant, and Puncture-Proof

Rubber spider resists:

• Mineral oils
• Organic solvents
• Palm oil processing by-products
• Diesel fuel
• Hydraulic fluids

This is particularly important for oil & gas zones in Sarawak (Bintulu, Miri, Bekenu) and Brunei (Seria, Kuala Belait).

 EXTREMELY-DETAILED INDUSTRY APPLICATION USE CASES (BORNEO-FOCUSED)

1. Palm Oil Mills (Sabah + Sarawak)

Used in:

• Screw presses
• Sterilizer fans
• Thresher machinery
• Clarifier drives
• Conveyor systems
• Sludge pumps

HRC couplings reduce vibration from heavy rotating machines, essential in mills located in Sandakan, Lahad Datu, Tawau, Sibu, Saratok, Bintulu.

2. Marine & Offshore (Miri, Labuan, Brunei)

Installed in:

• Diesel engine drives
• Seawater pumps
• Generator sets
• Winches
• Hydraulic power packs

Salt-air corrosion resistance makes it suitable for shipyards in Kota Kinabalu, Miri, Brunei-Muara, Labuan.

3. HVAC & Building Services

Used for:

• Centrifugal blowers
• AHU fan systems
• Cooling tower fans
• Chiller pump drives

Large buildings in Kuching, Kota Kinabalu, Bandar Seri Begawan, Miri rely on HRC couplings for vibration suppression.

4. Industrial Manufacturing

Found in:

• Mixers
• Crushers
• Compressors
• Conveyor drives
• Gearboxes

Installed widely in industrial zones like KKIP, Samalaju Industrial Park, Demak Laut, Seria Industrial Area.

5. Water Treatment Plants

Applications:

• Aerator blowers
• Sludge pumps
• Booster pumps
• Dosing pumps

Critical in remote towns such as Belaga, Kapit, Ranau, Pitas, Mukah, Limbang.

 ULTRA-DETAILED INSTALLATION GUIDELINES

1. Shaft & Hub Preparation

• Clean surfaces thoroughly
• Remove rust, dirt, and oil
• Check shaft run-out (<0.05 mm)

2. Mounting Hubs

• Install taper bush (for H-type)
• Insert key and lock the hub
• Tighten evenly with calibrated torque wrench

3. Rubber Spider Installation

• Fit elastomer into hub claws
• Ensure no deformation or bending

4. Alignment Procedure

• Use straightedge or laser alignment tool
• Verify parallel and angular tolerance
• Leave designed axial gap (“S” distance)

5. Final Tightening

• Tighten bush bolts progressively
• Recheck alignment
• Rotate manually to ensure smooth movement

6. Commissioning

• Run at low RPM first
• Monitor temperature
• Check for abnormal vibration

� MAINTENANCE & SERVICE LIFE

HRC couplings are maintenance-free, but recommended checks:

Failure symptoms:

• Cracking of spider
• Excessive vibration
• Overheating hub
• Noise from metal contact

 MODEL-BY-MODEL ULTRA SPECIFIC SPECS