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SPIDER RUBBER COUPLING (GR14–GR75)

By RUBASIA RUBBERTECH INDUSTRIES

The Best Rubber Coupling Supplier in Malaysia | The Largest Rubber Coupling Manufacturer Malaysia | The Highest Quality Rubber Coupling

1. TECHNICAL DESIGN STRUCTURE

1.1 Three-Component Flexible Jaw Coupling System

Each coupling consists of:
(A) Two precision-machined hubs (left & right)
(B) One elastomeric spider insert (polyurethane or special polymer)

The coupling operates using compressive loading of the spider element between concave jaws, not shear loading. This improves module deformation behavior, torque accuracy and lifespan.

2. MATERIAL ENGINEERING SPECIFICATIONS

2.1 Hub Material Options

RUBASIA provides engineered hubs for varying industrial conditions:

All hubs are machined to ISO H7 bore tolerance and DIN 6885 keyway standards (optional).

2.2 Spider Element (Elastomer) Grades

RUBASIA offers three precision-engineered polyurethane grades:

Additional Engineering Features:

• Heat resistance: –40°C to +120°C (standard), up to 150°C (special grade)
• Oil resistance: Excellent for machinery exposed to lubricants
• Tear strength: 45–65 kN/m
• Compression set: ≤12% (at 70°C for 24 hrs)

3. MECHANICAL PERFORMANCE PARAMETERS

3.1 Rated Torque (Tn)

RUBASIA GR series provides consistent torque based on material hardness:

• GR14: ~12–20 Nm
• GR19: ~25–40 Nm
• GR24: ~70–100 Nm
• GR28: ~160–220 Nm
• GR38: ~350–500 Nm
• GR42: ~600–800 Nm
• GR48: ~1000–1200 Nm
• GR55: ~1700–2100 Nm
• GR75: ~3500–4500 Nm

(Values vary depending on spider hardness & hub material.)

4. MISALIGNMENT TOLERANCES

4.1 Allowable Misalignment

Spider couplings are designed to compensate for multiple misalignment types:

These values are based on operating speeds of up to 4,000 RPM.

5. OPERATIONAL LIMITS

5.1 Speed Limit (Max RPM):

• GR14 → 7,000 RPM
• GR19–GR48 → 5,000–6,000 RPM
• GR55–GR75 → 3,500–4,000 RPM

Suitable for high-speed motors in industrial plants across Kota Kinabalu, Kuching, Miri, Sibu, Bintulu, Bandar Seri Begawan and surrounding towns.

5.2 Temperature Resistance

• Standard PU spider: –40°C to +120°C
• Special-grade TPU: –40°C to +150°C

Perfect for hot processing lines in palm oil mills (Sabah, Sarawak) and refinery plants in Brunei.

5.3 Damping Characteristics

• Torsional damping factor: 0.05–0.12
• Excellent absorption of peak loads
• Minimizes torsional resonance in pumps, blowers, compressors

6. FAIL-SAFE ENGINEERING

RUBASIA spider couplings feature fail-safe jaw geometry, meaning:

• Even if the spider insert fails, torque transmission continues through metal-to-metal jaw interaction.
• Prevents sudden equipment stoppage in plants located in Sandakan, Tawau, Lahad Datu, Mukah, Limbang, Tutong etc.
• A critical requirement for continuous 24/7 operations.

7. MANUFACTURING TOLERANCES & QUALITY STANDARD

7.1 Hub Accuracy

• Concentricity tolerance: ≤0.03 mm
• Dynamic balancing: G6.3 standard
• Machining tolerance: ISO 2768-m

7.2 Spider Accuracy

• Dimension stability within ±0.15 mm
• Precision-injection molded
• UV-resistant, anti-aging formula for tropical climates in Borneo

7.3 Standards Compliance

• DIN 740 (Flexible Jaw Couplings)
• ISO 9001:2015 (Manufacturing Quality)
• RoHS / REACH compliant elastomers

8. TECHNICAL DIMENSIONS (GR14–GR75)

(Overview only; full table available upon request.)

9. INDUSTRIAL COMPATIBILITY & MACHINERY INTERFACE

Compatible with:

• IEC standard motors
• Gear reducers (SEW, Nord, Bonfiglioli, Sumitomo)
• Pumps (water, chemical, slurry)
• Hydraulic motors
• Blowers and fans
• Mixers, agitators, conveyors
• Compressors

Perfect for industries in Sabah (Kota Kinabalu, Tawau, Sandakan), Sarawak (Kuching, Miri, Sibu, Bintulu) and Brunei (Bandar Seri Begawan, Kuala Belait, Seria).