Product Overview
MONORAIL BM is SCHNEEBERGER's four-row ball-type linear guideway system, renowned for its outstanding dynamic characteristics and cost-effectiveness. With optimized ball raceway design and streamlined component count, the BM series delivers exceptionally smooth operation, low pulsation, low friction, and high travel speeds, making it an ideal choice for high-speed precision positioning applications.
First Choice for High-Speed Applications
The BM series uses balls as rolling elements, offering a lower friction coefficient compared to roller types. It is particularly suitable for high-speed operation (up to 5 m/s) and frequent acceleration/deceleration, and is widely used in industrial applications with high demands on speed, reliability and consistent running properties.
The trapezoidal rail profile design ensures extremely high guideway rigidity while significantly reducing maintenance requirements. Wear parts can be replaced without disassembling the entire guideway system. Combined with compact wiper design that effectively reduces friction and wear, the system lifespan is extended. MONORAIL BM perfectly complements the MR roller guideway, providing optimal solutions for various applications.
BM System Features
- Four-Row Ball O-Configuration - Provides uniform four-directional load capacity, ensuring high rigidity and precision
- Optimized Ball Raceway Design - Reduced number of raceway transition points for exceptionally smooth operation
- Low Friction, High-Speed Operation - Small ball contact area, low friction coefficient, maximum speed up to 5 m/s
- Trapezoidal Rail Profile - Ensures extremely high system rigidity with stable guidance accuracy
- Compact Wiper Design - Effective sealing with reduced friction and wear for extended service life
- Modular Maintenance Design - Wear parts can be replaced independently without disassembling the entire rail
- Long Rail System Length - Single-piece rail length up to 6000mm (Size 45)
- Multiple Carriage Types - Over 10 carriage designs to meet various mounting space requirements
Rail Types
MONORAIL BM offers multiple rail types to meet different mounting and protection requirements.
| Illustration | Type | Description | Available Sizes | Features |
 | N | Standard | 20, 25, 30, 35, 45 | Top mounting, countersunk screws, high system length |
 | NU | Tapped Holes at Bottom | 15, 20, 25, 30, 35, 45 | Bottom mounting, threaded holes, high precision without lateral reference surface |
 | C | Cover Strip Type | 20, 25, 30, 35, 45 | Top mounting, supports metal cover strip, high system length |
 | CD | Through-Hardened Cover Strip | 15, 20, 25, 30, 35 | Top mounting, supports metal cover strip, through-hardened |
Carriage Types
MONORAIL BM offers over 10 carriage types, covering different mounting methods, heights, and load requirements.
| Type | Description | Available Sizes | Mounting | Features |
| A | Standard | 15-45 | Top | Standard length, balanced load capacity |
| B | Standard Long | 15-45 | Top | Extended design, higher moment load |
| C | Compact High | 15-45 | Top | Lower height, suitable for space-constrained applications |
| D | Compact High Long | 15-45 | Top | Extended compact high type, higher moment |
| E | Compact High, Lateral Mounting | 25-30 | Lateral | Side mounting holes, special mounting requirements |
| F | Compact | 15-45 | Top | Lowest height design |
| G | Compact Long | 15-45 | Top | Extended compact design |
| H | Standard Narrow | 20-35 | Top | Narrower design |
| J | Short | 15-35 | Top | Shortened length, compact space |
| K | Short Narrow | 15-35 | Top | Short and narrow design |
| L | Compact Short | 20-35 | Top | Low height, short length |
| M | Short Ultra-Narrow | 30-35 | Top | Most compact design |
| N | Compact Ultra-Short | 20-35 | Top | Low height, ultra-short length |
| 2L | Two-Row | 15-30 | Top | Two rows of balls, extremely short length, suitable for light load high speed |
Available Sizes
Select a size to view detailed specifications:
BM vs MR Comparison
| Feature | MONORAIL BM (Ball) | MONORAIL MR (Roller) |
| Rolling Element | Steel balls | Cylindrical rollers |
| Friction Coefficient | Lower | Higher |
| Rigidity | Medium | Highest |
| Load Capacity | Medium | Highest |
| Maximum Speed | 5 m/s | 3 m/s |
| Applications | High speed, light to medium loads | High rigidity, heavy loads |
