BM Size 25 Technical Specifications
Versatile Choice Balancing Size and Load Capacity
Rail Types BM S 25
| BM S 25-N | BM S 25-NU | BM S 25-C |
|---|---|---|
 |  |  |
| Standard Standard | Tapped Holes at Bottom Tapped holes at bottom | Cover Strip Cover strip |
Rail Dimensions BM S 25
Rail Specifications BM S 25
| Parameter | BM S 25-N | BM S 25-NU | BM S 25-C |
|---|---|---|---|
| Rail Width B1 (mm) | 25 | 25 | 25 |
| Rail Height J1 (mm) | 22.7 | 22.7 | 22.7 |
| Max Single Piece Length L3 (mm) | 6000 | 6000 | 3000 |
| Mounting Hole Pitch L4 (mm) | 60 | 60 | 60 |
| First/Last Hole Position L5/L10 (mm) | 28.5 | 28.5 | 28.5 |
| Weight per Meter (kg/m) | 3.0 | 3.1 | 2.8 |
Carriage Types BM W 25
| BM W 25-A / B | BM W 25-C / D | BM W 25-E | BM W 25-F / G |
|---|---|---|---|
 |  |  |  |
| Standard / Standard Long Standard / Standard long | Compact High / Compact High Long Compact high / long | Lateral Mounting Lateral fixation | Compact / Compact Long Compact / Compact long |
Carriage Dimensions BM W 25
Carriage Specifications BM W 25
| Parameter | BM W 25-A | BM W 25-B | BM W 25-C | BM W 25-D | BM W 25-F | BM W 25-G | BM W 25-H | BM W 25-J | BM W 25-K | BM W 25-L | BM W 25-M | BM W 25-N |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| System Height A (mm) | 36 | 36 | 36 | 45 | 45 | 45 | 36 | 36 | 33 | 33 | 33 | 36 |
| Carriage Width B (mm) | 70 | 70 | 48 | 48 | 48 | 48 | 70 | 70 | 48 | 48 | 40 | 48 |
| Reference Surface Distance B2 (mm) | 23.5 | 23.5 | 12 | 12 | 12 | 12 | 25 | 25 | 12.5 | 12.5 | 12.5 | 12.5 |
| Carriage Height J (mm) | 29.5 | 29.5 | 29.5 | 38.5 | 29.5 | 38.5 | 29.5 | 29.5 | 27 | 27 | 27 | 29.5 |
| Carriage Length L (mm) | 84.9 | 101.6 | 84.9 | 101.6 | 84.9 | 101.6 | 84.9 | 101.0 | 84.9 | 65.1 | 84.4 | 65.1 |
| Steel Body Length L6 (mm) | 59.9 | 76.5 | 59.5 | 76.5 | 59.5 | 76.5 | 59.5 | 66 | 59 | 40 | 59.1 | 40 |
| Lateral Mounting Hole Pitch N (mm) | 57 | 57 | 36 | 36 | 36 | 36 | 60 | 60 | 38 | 38 | 30 | 38 |
| Reference Surface Height O (mm) | 5.4 | 5.4 | 5.4 | 5.4 | 5.4 | 5.4 | 5.4 | 5.4 | 5.4 | 5.4 | 5.4 | 5.4 |
| Carriage Weight (kg) | 0.9 | 1.0 | 0.6 | 0.8 | 0.6 | 0.8 | 0.8 | 0.8 | 0.5 | 0.4 | 0.5 | 0.4 |
Rigidity Curve and Load Ratings
Load Ratings
| Carriage Type | C₀ Static Load (N) | C₁₀₀ Dynamic Load (N) | M₀Q Static Cross Moment (Nm) | M₀L Static Long. Moment (Nm) | MQ Dynamic Cross Moment (Nm) | ML Dynamic Long. Moment (Nm) |
|---|---|---|---|---|---|---|
| A / C / F / H / L | 40,000 | 16,000 | 632 | 505 | 251 | 201 |
| B / D / G | 60,000 | 21,000 | 945 | 976 | 376 | 388 |
| J / M | 40,000 | 16,000 | 632 | 505 | 251 | 201 |
| K / N | 22,000 | 12,500 | 251 | 108 | 145 | 62 |
Load Rating Definitions
- C₀ = Static load capacity
- C₁₀₀ = Dynamic load capacity - 100km travel life
- M₀Q / MQ = Cross moment (lateral)
- M₀L / ML = Longitudinal moment
Available Options
Accuracy Classes
| Accuracy Class | Carriage/Rail Tolerance A/B2 | Matched Carriage Max Deviation ΔA/ΔB2 | Standard Carriage Max Deviation |
|---|---|---|---|
| G0 Highly Accurate | ± 5 µm | 3 µm | 10 µm |
| G1 Very Accurate | ± 10 µm | 5 µm | 20 µm |
| G2 Accurate | ± 20 µm | 7 µm | 40 µm |
| G3 Standard | ± 30 µm | 25 µm | 60 µm |
Preload Classes
| Preload Class | Preload Force (% of C₀) | Application |
|---|---|---|
| V0 Extra Light Preload | 0-2% | Extremely low friction, uniform load, minimal vibration |
| V1 Light Preload | 3% | Low friction, uniform load, slight vibration |
| V2 Medium Preload | 8% | High rigidity, moderate variable load and vibration |
| V3 High Preload | 13% | Maximum rigidity, impact loads, highly variable loads |
Lubrication as Delivered
| Code | Type | Description | Application |
|---|---|---|---|
| LN | Oil Protect | Light oiling | Applications with continuous oil supply after installation |
| LG | Grease Protect | Thin grease layer | Applications with continuous grease supply after installation |
| LV | Full Greasing | Complete grease fill | Manual lubrication applications |
Surface Treatment (Coating)
| Code | Type | Features |
|---|---|---|
| — | Standard (No Coating) | Standard steel surface |
| CN | Hard Chromium | Excellent corrosion protection, high wear resistance, good emergency running properties |
| CH | Black Oxide | Enhanced rust protection |
Reference Side
R1 - Reference at Bottom R2 - Reference on Top
Order Code Examples
Rail Order Code
BM S 25-N-G1-KC-R1-500-28.5-28.5
- BM S 25 = MONORAIL Ball Profile Rail Size 25
- N = Standard (top mounting)
- G1 = Very Accurate
- KC = Countersunk mounting holes
- R1 = Reference at bottom
- 500 = Rail length 500mm
- 28.5-28.5 = First/last hole positions
Carriage Order Code
BM W 25-A-V1-S11-LV-CN
- BM W 25 = MONORAIL Ball Profile Carriage Size 25
- A = Standard carriage
- V1 = Light preload
- S11 = Lubrication port position (top center)
- LV = Full greasing
- CN = Hard chromium coating