Technical Review: BANDO BANFLEXSCRUM Wide Angle Belt 2-11MS825/3-11MS825/4-11MS825 - Selection Guide & Specs
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Overview: Eliminating Vibration in High-Speed Industrial Drives
The BANDO BANFLEXSCRUM Wide Angle Belt represents a breakthrough solution for industrial facilities struggling with vibration issues in high-speed power transmission systems. Traditional V-Belts often fail at speeds exceeding 40 m/s, causing excessive vibration, premature wear, and reduced equipment lifespan. This specialized wide-angle belt addresses these challenges head-on, enabling stable power transmission at speeds up to 60 m/s while maintaining vibration-free operation.
Available in three configurations (2-11MS825, 3-11MS825, and 4-11MS825), these banded polyurethane belts feature a unique 60° wedge angle design that prevents belt flipping and detachment from pulleys. The ground flanks and enlarged profile angle work in concert to deliver exceptionally smooth running characteristics, making them ideal for demanding applications in industrial automation, CNC machinery, textile equipment, and high-speed packaging lines.
Technical Specifications Analysis
The BANFLEXSCRUM series employs advanced polyurethane construction with polyester tensile members, creating a belt that combines flexibility with exceptional strength. The diagonally grooved back optimizes flexibility while maintaining structural integrity, and the tie band ensures multiple ribs work in unison for vibration-free operation.
| Specification | 2-11MS825 | 3-11MS825 | 4-11MS825 |
|---|---|---|---|
| Effective Length | 825 mm | 825 mm | 825 mm |
| Number of Ribs | 2 ribs | 3 ribs | 4 ribs |
| Profile Type | 11MS (Wide Angle) | 11MS (Wide Angle) | 11MS (Wide Angle) |
| Wedge Angle | 60° | 60° | 60° |
| Top Width (bo) | 19.0 mm | 28.5 mm | 38.0 mm |
| Belt Thickness (h) | 8.0 mm | 8.0 mm | 8.0 mm |
| Rib Width (b) | 9.5 mm | 9.5 mm | 9.5 mm |
| Maximum Speed | 60 m/s | 60 m/s | 60 m/s |
| Temperature Range | -30°C to +60°C | -30°C to +60°C | -30°C to +60°C |
| Material | Polyurethane with Polyester Cord | Polyurethane with Polyester Cord | Polyurethane with Polyester Cord |
| Oil/Ozone Resistance | Excellent | Excellent | Excellent |
The 11MS profile designation indicates a wide-angle design specifically engineered for high-speed applications. The "825" measurement refers to the effective length in millimeters, while the prefix numbers (2, 3, 4) indicate the number of ribs. This standardized marking system simplifies selection and replacement across industrial power transmission systems.
Buying Considerations: Selection Guide for Industrial Applications
When selecting the appropriate BANFLEXSCRUM belt for your application, consider these critical factors:
1. Power Requirements & Rib Count Selection: The number of ribs directly correlates with power transmission capacity. Use 2-rib belts for light to medium loads (up to 3 kW), 3-rib belts for medium to heavy loads (3-7 kW), and 4-rib belts for heavy-duty applications (7-12 kW). For systems requiring more than 4 ribs, combine multiple belts (e.g., one 2-rib and one 3-rib belt for 5-rib equivalent).
2. Speed Compatibility: These belts excel in high-speed applications (30-60 m/s). For speeds below 30 m/s, consider standard polyurethane V-belts for cost efficiency. The ground flanks and 60° angle specifically target vibration reduction at elevated speeds.
3. Environmental Conditions: The polyurethane construction provides exceptional resistance to oil, ozone, and weather effects. However, temperature limitations (-30°C to +60°C) must be respected. For extreme temperature applications beyond this range, consult specialized high-temperature belts.
4. Pulley Compatibility: Ensure your pulley grooves match the 60° wedge angle and 11MS profile dimensions. Mismatched angles cause improper seating, reduced grip, and premature wear. The small pulley diameter capability (as low as 45 mm for 11MS profile) enables compact drive designs.
5. Installation & Maintenance: Always install matched sets when using multiple belts. The banded design prevents individual rib movement, but proper tensioning remains critical. Use a tension gauge to achieve manufacturer-recommended values for optimal performance and longevity.
Frequently Asked Questions
Q1: What makes the BANFLEXSCRUM different from standard V-belts?
The BANFLEXSCRUM features a 60° wide angle (vs. standard 40°), ground flanks for reduced vibration, polyurethane construction for oil/ozone resistance, and a banded design that bonds multiple ribs together. These features enable operation at speeds up to 60 m/s with minimal vibration, whereas standard V-belts typically max out at 40 m/s.
Q2: Can I mix different rib counts in a multi-belt drive?
Yes, but with specific guidelines. For drives requiring 5 or more ribs, BANDO recommends combining belts (e.g., 2-rib + 3-rib for 5 ribs, or 3-rib + 3-rib for 6 ribs). Always use belts from the same manufacturing batch to ensure consistent length and performance characteristics. Never mix old and new belts in the same drive.
Q3: How do I determine the correct belt length for replacement?
Measure the effective length (pitch length) of your existing belt or calculate it based on pulley center distance and diameters. The "825" in 11MS825 indicates 825 mm effective length. For precise measurements, use a belt length measuring tool or consult the original equipment specifications. When in doubt, belt measuring tools provide accurate results for replacement sizing.
