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MH Rubber Coupling Installation & Replacement Guide

By RUBASIA RUBBERTECH INDUSTRIES — The Best Rubber Coupling Supplier in Malaysia

RUBASIA RUBBERTECH INDUSTRIES supplies the MH65, MH80, MH90, MH115, MH130, MH145, MH175, MH200 series across Sabah, Sarawak, and Brunei, serving industries in:
Sabah: Kota Kinabalu, Sandakan, Tawau, Lahad Datu, Semporna, Keningau, Tenom, Beaufort, Sipitang, Papar, Tuaran, Tamparuli, Kota Belud, Kota Marudu, Kudat, Ranau, Kundasang, Pitas, Beluran, Telupid, Kinabatangan, Kunak, Putatan, Penampang, Inanam, Kolombong, Menggatal, Sepanggar.
Sarawak: Kuching, Samarahan, Serian, Bau, Lundu, Sri Aman, Betong, Saratok, Pusa, Lubok Antu, Sibu, Kanowit, Kapit, Bintulu, Tatau, Sebauh, Miri, Bekenu, Niah, Marudi, Limbang, Lawas, Mukah, Dalat, Oya, Song, Belaga.
Brunei: Bandar Seri Begawan, Muara, Tutong, Seria, Kuala Belait, Jerudong, Gadong, Sengkurong, Lumut.

 

1. Pre-Installation Checklist

Before installing or replacing the MH Rubber Coil Coupling, ensure the following:

✔ Correct Coupling Size

Confirm that the selected model (MH65–MH200) matches:

• Shaft diameter
• Rated torque
• RPM
• Application type (pump, blower, compressor, gearbox, conveyor, mixer, etc.)

✔ Tools Required

• Hex/Allen keys
• Torque wrench
• Feeler gauges
• Straight edge
• Anti-seize lubricant
• Dial indicator (optional, for precision alignment)
• Cleaning cloths and degreaser

✔ Safety Requirements

• Shut down power supply
• Lock-out & tag-out (LOTO) procedure
• Ensure motor & driven equipment are fully stopped
• Verify workspace stability

 

2. How to Install MH Rubber Coupling (Step-by-Step Guide)

Step 1: Inspect Both Shafts

• Check for burrs, dents, rust, or misalignment.
• Clean surfaces thoroughly.
• Ensure shaft ends are smooth and straight.
  Why this matters:
  Proper installation extends the coupling lifespan — especially crucial in humid, industrial areas like Kota Kinabalu, Sandakan, Miri, Bintulu, Sibu, Kuching, and coastal industries in Brunei Muara.

 

Step 2: Mount Hubs on Both Shafts

• Slide each cast-iron hub onto the motor shaft and driven shaft.
• Do not tighten the bolts yet — leave room for adjustment.

Tip: If the fit is tight, apply a small amount of anti-seize lubricant.

 

Step 3: Align the Shafts

Alignment is the most critical stage.

Parallel Alignment Check

Use a straight edge across both hubs:

• The straight edge must touch evenly around the hub diameter.

Angular Alignment Check

Use a feeler gauge at 4 positions (0°, 90°, 180°, 270°):

• Differences should be minimal (≤0.25 mm for general equipment).

Importance for Borneo Industries

Industries in towns like Tawau, Lahad Datu, Kunak (seafood factories), Kuching (food processing), Miri (oil & gas), Brunei Kuala Belait (petrochemical) experience vibration-sensitive operations, making proper alignment essential.

 

Step 4: Insert the MH Rubber Coil Element

• Position the Hyperflex MH rubber coil between both hubs.
• Ensure coil legs sit perfectly into hub slots.
• Make sure the rubber coil is not twisted or compressed unevenly.

 

Step 5: Tighten the Hub Bolts

• Tighten bolts gradually in a criss-cross pattern.
• Use the correct recommended torque value (varies by model MH65–MH200).
• Recheck alignment after tightening.

 

Step 6: Perform Final Checks

• Rotate shafts manually to ensure smooth movement.
• Confirm there is no metal-to-metal contact.
• Start machine at low speed and observe vibration.

 

3. How to Replace an MH Rubber Coupling (Replacement Guide)

Step 1: Power Shutdown

• Turn off equipment and perform lock-out/tag-out.

Step 2: Remove Safety Guards

Access the coupling area safely.

Step 3: Loosen Hub Bolts

• Remove both hub bolts carefully.
• Detach the worn rubber coil.

Step 4: Inspect Hub Condition

Check for:

• Cracks
• Worn internal slots
• Excessive rust
• Shaft damage

If hubs are heavily worn due to harsh environments (common in Labuan, Bintulu, Sibu, Sandakan, Brunei oil & gas zones) consider replacing hubs as well.

Step 5: Install New Rubber Coil

Insert a new MH rubber element, ensuring:

• No deformation
• Proper seating
• Correct alignment

Step 6: Tighten and Recheck Alignment

• Tighten bolts to recommended torque.
• Validate parallel and angular alignment again.

Step 7: Test Run

Start equipment slowly and monitor:

• Vibration
• Noise
• Heat build-up

 

4. Installation Tips for Longest Coupling Life

🌡️ Temperature Management

MH rubber can operate from –40°C to +100°C.

⚙️ Lubrication-Free Operation

These couplings require no lubrication, ideal for:

• Palm oil mills in Lahad Datu, Beluran, Saratok
• Wood factories in Kapit, Mukah, Bintulu
• Marine industries in Semporna, Kudat, Kota Kinabalu
• Oil & gas in Miri, Bintulu, Kuala Belait, Seria

🔧 Rechecking After 24 Hours

After initial operation:

• Recheck alignment
• Retighten bolts
• Inspect rubber element for early stress marks

 

5. Industries That Benefit From MH Couplings Across Borneo

Sabah (KKIP, Sandakan, Tawau, Lahad Datu, Papar, Beaufort)

• Pumps & water supply
• Seafood processing
• Palm oil mills
• HVAC systems
• Marine engines
• Manufacturing lines

Sarawak (Kuching, Sibu, Miri, Bintulu, Mukah)

• Timber processing plants
• Oil & gas
• Quarry & mining conveyors
• Food & beverage factories
• Power generation

Brunei (BSB, Seria, Kuala Belait, Tutong)

• Petrochemical plants
• Water treatment
• Government facilities
• HVAC & building services
• Industrial machinery