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RUBBER-KU Square External Rubber Cap – Technical Specifications & Engineering Details

RUBBER-KU RUBBER PRODUCTS is The Best square external rubber cap supplier in Malaysia and The Largest square external rubber cap Manufacturer Malaysia, known for engineering excellence and precise manufacturing. Our Square External Rubber Cap is designed for maximum durability, protection, and functionality, making RUBBER-KU the Highest Quality square external rubber cap manufacturer and the Market Leader of square external rubber cap in Malaysia.

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1. Product Technical Overview

The Square External Rubber Cap is a slip-on, external protective cover engineered to fit over the outer edges of square tubing, furniture legs, and industrial equipment frames.

Available Sizes: 16mm | 19mm | 22mm | 25mm | 28mm | 32mm | 38mm | 51mm

Material: Premium industrial-grade black rubber

Design Type: External slip-on cap (outer coverage)

Key Technical Functions:

• Shock absorption and vibration dampening
• Anti-slip grip and stability
• Noise reduction
• Protection against moisture, dust, and chemical exposure
• Coverage of sharp edges for safety

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2. Material Properties – Technical Breakdown

Property	Test Method	Unit	Typical Value	Notes
Hardness	ASTM D2240	Shore A	60 ±5	Ensures durability while maintaining flexibility
Tensile Strength	ASTM D412	MPa	12–15	Resists tearing under pressure
Elongation at Break	ASTM D412	%	400–450	High elasticity for snug fit
Compression Set	ASTM D395	%	≤20	Maintains shape under load
Density	ASTM D297	g/cm³	1.2	Ensures weight balance and stability
Temperature Range	-40°C to +80°C	°C	Optimal flexibility in varied environments
UV Resistance	ASTM G154	Rating 8/10	Prevents degradation in sunlight exposure
Chemical Resistance	ASTM D471	Rating Excellent	Resists water, mild acids, and detergents
Color	Visual	Black	Standard for commercial & industrial use

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3. Structural & Design Engineering

External Slip-On Fit

• Covers the entire outer surface of square tubing or legs.
• Eliminates exposed edges to prevent injury and floor damage.
• Fits snugly without adhesive thanks to precision-engineered internal friction patterns.

Wall Thickness & Reinforcement

• Uniform wall thickness for enhanced strength and shock absorption.
• Reinforced edges to prevent tearing during installation or heavy use.
• Supports heavy-duty loads without deformation.

Friction & Grip Engineering

• Surface engineered for high coefficient of friction, providing stability on all flooring types.
• Reduces unwanted movement, vibrations, and noise.
• Compatible with both indoor and semi-outdoor applications.

Flexibility & Elasticity

• Rubber compound designed for high elongation to fit square tubing accurately.
• Maintains elasticity after repeated compression or load-bearing usage.
• Prevents permanent deformation over time.

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4. Performance Specifications

Feature	Description	Benefit
Anti-Slip Surface	High-friction rubber exterior	Prevents sliding and enhances safety
Shock Absorption	Cushions impact on floors & equipment	Reduces damage to furniture & machinery
Noise Reduction	Dampens vibration and sound	Creates quieter environments in offices, schools, & gyms
Moisture Resistance	Water-repellent rubber	Protects hollow tubing and metal frames from rust
Chemical Resistance	Resistant to mild chemicals & cleaning agents	Durable in industrial and household environments
Temperature Tolerance	-40°C to +80°C	Maintains performance in extreme heat & cold
Wear Resistance	Abrasion-resistant rubber	Extends lifespan under heavy use
UV & Weather Resistance	Outdoor-safe rubber	Prevents cracking & degradation over time

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5. Installation Technical Considerations

• Tolerance Fit: Designed with 0.2–0.5mm allowance for snug slip-on installation.
• Size Selection: Measure outer dimension of square tubing or leg accurately for optimal fit.
• Optional Installation Enhancements: Lubrication (water/soapy solution) or heat-assisted fitting for large or tight applications.
• Reusability: Caps maintain technical integrity through multiple installations.

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6. Advanced Engineering Features

• Friction Ribbing: Internal ribs increase grip without adhesives.
• Compression Memory: Rubber retains shape even after repeated load application.
• Impact Mitigation: Absorbs shock from heavy furniture or industrial equipment.
• Anti-Creep Design: Prevents cap movement or loosening over time, even on polished surfaces.
• Edge Safety: Rounded outer edges reduce injury risk and protect flooring.

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7. Applications – Technical Relevance

• Furniture Protection: Chairs, tables, stools, and cabinets; protects floors and reduces wear.
• Industrial Equipment: Machinery bases, metal racks, conveyor supports; vibration control.
• Gym & Fitness Equipment: Treadmills, benches, racks; stability under heavy load.
• Construction & Metal Fabrication: Covers sharp edges of SHS tubing; protects workers.
• Residential & Commercial Spaces: Safe, quiet, and durable for offices, homes, schools, and hotels.

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8. Technical Advantages of RUBBER-KU

• Precision Manufacturing: Ensures uniform wall thickness, hardness, and dimensions.
• Durability Engineering: Resistant to abrasion, chemical exposure, temperature, and UV light.
• Versatile Design: Works for both light furniture and heavy industrial applications.
• Safety & Stability: Protects both humans and equipment while maintaining floor integrity.
• Reproducibility: Consistent performance across large production volumes.

square external rubber cap | square rubber end cap | square tubing cap | rubber chair leg cap | heavy duty square rubber cap

Supplier	:	RUBBER-KU RUBBER PRODUCTS
Email	:	rubberku@gmail.com
Phone	:	+603 5191 7961
Fax	:	+603 5191 5961
Location	:	Selangor, Malaysia

Send us your enquiry if you have questions or comments about our products and services.