SPA V-belt

The SPA V-belt is a wide-section trapezoidal power transmission belt, widely used in conveyor systems and industrial drive applications thanks to its high load capacity and long service life. SPA belts are applied across many industries—from manufacturing and mining to machinery engineering—helping transmit power efficiently, reduce slippage, and ensure smooth operation.

In this article, Belota helps you clearly understand the structure, standard dimensions, and correct selection of SPA V-belts, ensuring stable transmission performance, extended belt life, and long-term maintenance cost savings.

What Is an SPA V-Belt?

The SPA belt belongs to the Narrow V-belt group, specifically designed for industrial power transmission systems. Its V-shaped profile increases grip on pulleys, delivers strong and stable power transmission, and supports high power output in compact drive layouts.

Standard SPA dimensions (DIN / ISO):

• Top width (w): 12.7 mm

• Belt height (h): 10 mm

• Groove angle: 38°

Manufactured according to DIN / ISO standards, SPA belts ensure high dimensional accuracy, stable power transfer, and excellent durability.

Structure of SPA V-Belts

SPA belts are constructed with multiple reinforced layers to enhance strength and operational efficiency:

• Fabric cover layer: Resistant to abrasion, oil, dust, and moisture

• Polyester tensile cords: High tensile strength, low elongation, maintains dimensional stability

• Heat-resistant rubber layer: Protects tensile cords from heat and friction

• Reinforcement layer: Improves load capacity and prevents deformation

• Compression rubber layer: Enhances grip, minimizes slippage, and withstands high compressive forces

>> See more: A Section V-Belt Supplier | Full Size Range – Belota

SPA V-Belt Technical Specifications

• Top width: 12.7 mm

• Belt height: 10 mm

• Pitch width: 9.7 mm

• Inner length (Li): 637 – 5000 mm

• Outer length (La): 670 – 5033 mm

• Allowable tension: 100 – 4000 N

• Service life: 1,000 – 3,000 operating hours

• Operating temperature: -30°C to +90°C

Key Advantages of SPA V-Belts

• Stable power transmission with minimal slippage

• Smooth operation, low noise, reduced vibration

• Excellent heat and abrasion resistance

• Long service life with low maintenance cost

• Wide range of standard sizes for easy replacement

Applications of SPA V-Belts

SPA belts are widely used in industrial applications such as:

• Industrial machinery: presses, saws, grinders, woodworking machines

• Automotive & mechanical systems: auxiliary drives, air compressors

• Generators, water pumps, high-capacity compressors

• Manufacturing industries: food processing, ceramic tiles, textile & dyeing

Common SPA V-Belt Sizes Available at Belota

Important Notes When Selecting SPA V-Belt Size

Choosing the correct SPA belt size directly affects system performance, belt lifespan, and maintenance costs. Key factors to consider include:

Accurate Belt Length Measurement

SPA belts are available in multiple standard lengths (SPA 900, SPA 1000, SPA 1250, etc.). Measure the center distance between pulleys and pulley diameters precisely.

• Belts that are too short cause excessive tension and bearing damage

• Belts that are too long increase slippage and reduce efficiency

Pulley Compatibility

SPA belts require SPA-standard pulley grooves. Installing SPA belts on SPZ or SPB pulleys can lead to:

• Misalignment

• Rapid pulley groove wear

• Reduced belt lifespan

Number of Belts for Required Power

High-load systems often require multiple SPA belts running in parallel. Using too few belts increases load per belt, leading to slippage or premature failure.

Operating Conditions

Consider real working conditions such as:

• High temperatures

• Dusty or oily environments

• Continuous 24/7 operation

In harsh environments, high-quality SPA belts with stable tensile cords are recommended to minimize elongation and early wear.

Avoid Confusion Between Length Standards

When ordering SPA belts, clearly specify:

• La: outer length

• Li: inner length

• Ld / Lw: pitch length (most commonly used)

Length confusion is a common reason belts fail to fit.

Technical Consultation for Replacements

For existing systems, provide the old belt code or pulley specifications to ensure accurate replacement and optimal transmission performance.

>> See more: Genuine Mitsuboshi V-Belts, Full Size Range | Belota

Latest SPA V-Belt Price Update

SPA belt prices vary depending on belt length, brand, origin, and material quality. Current market ranges are approximately:

• Short to medium SPA belts: 100,000 – 250,000 VND per belt

• Long SPA belts: 300,000 – 600,000 VND per belt

• High-performance, heat-resistant SPA belts: from 600,000 VND per belt and above

Trusted Supplier of Genuine SPA V-Belts

Stable transmission, strong pulley grip, and long-lasting performance - Belota’s premium SPA V-belts are the optimal choice for modern industrial machinery. We are committed to delivering:

✅ High-quality materials – Industrial-grade rubber & PU with excellent wear resistance

✅ Optimized transmission efficiency – Reduced slippage, stable torque output

✅ Wide product range – V-belts, timing belts, PU belts, flat & round belts

✅ Custom sizing – Cut-to-length based on load, speed, and pulley type

✅ Industrial-grade safety – Oil-resistant, heat-resistant, suitable for harsh environments

✅ Expert technical consultation – Accurate belt selection for each machine

✅ Fast installation & replacement – Nationwide service support

✅ Lower operating costs – Minimal elongation, reduced maintenance frequency

✅ Easy integration – Compatible with pumps, compressors, CNC machines, conveyors, and production equipment

Contact Belota at 0917 657 946 for professional consultation and the right SPA belt solution for your system.

See more: Drive Belts – Full Range, High Performance & Competitive Prices