BM Size 45 Technical Specifications
Largest Size in BM Series for Heavy Load Applications
Rail Types BM S 45
| BM S 45-N | BM S 45-NU | BM S 45-C |
|---|---|---|
 |  |  |
| Standard Standard | Tapped Holes at Bottom Tapped holes at bottom | Cover Strip Cover strip |
Rail Dimensions BM S 45
Rail Specifications BM S 45
| Parameter | BM S 45-N | BM S 45-NU | BM S 45-C |
|---|---|---|---|
| Rail Width B1 (mm) | 45 | 45 | 45 |
| Rail Height J1 (mm) | 37 | 37 | 37 |
| Max Single Piece Length L3 (mm) | 6000 | 6000 | 6000 |
| Mounting Hole Pitch L4 (mm) | 105 | 105 | 105 |
| First/Last Hole Position L5/L10 (mm) | 52 | 52 | 52 |
| Weight per Meter (kg/m) | 8.8 | 9.3 | 8.6 |
Carriage Types BM W 45
| BM W 45-A / B | BM W 45-C | BM W 45-F / G |
|---|---|---|
 |  |  |
| Standard / Standard Long Standard / Standard long | Compact High Compact high | Compact / Compact Long Compact / Compact long |
Carriage Dimensions BM W 45
Carriage Specifications BM W 45
| Parameter | BM W 45-A | BM W 45-B | BM W 45-C | BM W 45-D | BM W 45-F | BM W 45-G |
|---|---|---|---|---|---|---|
| System Height A (mm) | 60 | 60 | 60 | 60 | 60 | 60 |
| Carriage Width B (mm) | 120 | 120 | 86 | 86 | 86 | 86 |
| Reference Surface Distance B2 (mm) | 37.5 | 37.5 | 20.5 | 20.5 | 20.5 | 20.5 |
| Carriage Height J (mm) | 50.8 | 50.8 | 50.8 | 50.8 | 50.8 | 50.8 |
| Carriage Length L (mm) | 127.4 | 160.9 | 127.4 | 160.9 | 127.4 | 160.9 |
| Outer Mounting Hole Pitch L1 (mm) | 80 | 80 | 60 | 60 | 60 | 60 |
| Inner Mounting Hole Pitch L2 (mm) | 80 | 80 | - | - | - | - |
| Steel Body Length L6 (mm) | 90 | 123.6 | 90 | 123.6 | 90 | 123.6 |
| Lateral Mounting Hole Pitch N (mm) | 100 | 100 | 60 | 60 | 60 | 60 |
| Reference Surface Height O (mm) | 10 | 10 | 10 | 10 | 10 | 10 |
| Carriage Weight (kg) | 3.3 | 4.2 | 3.3 | 4.3 | 2.7 | 3.5 |
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 | 134,800 | 69,800 | 2,893 | 2,488 | 1,465 | 1,261 |
| B / D / G | 178,300 | 74,700 | 4,070 | 4,298 | 1,769 | 1,869 |
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 |
Reference Side
R1 - Reference at Bottom R2 - Reference on Top
Order Code Examples
Rail Order Code
BM S 45-N-G1-KC-R1-500-52-52
- BM S 45 = MONORAIL Ball Profile Rail Size 45
- N = Standard (top mounting)
- G1 = Very Accurate
- KC = Countersunk mounting holes
- R1 = Reference at bottom
- 500 = Rail length 500mm
- 52-52 = First/last hole positions
Carriage Order Code
BM W 45-A-V1-S11-LV-CN
- BM W 45 = MONORAIL Ball Profile Carriage Size 45
- A = Standard carriage
- V1 = Light preload
- S11 = Lubrication port position (top center)
- LV = Full greasing
- CN = Hard chromium coating