BM WR/SR Size 20 Technical Specifications
Corrosion-Resistant Precision Ball Guide
Dimensional Drawing BM WR/SR 20
Rail Specifications
| Parameter | BM SR S 20-ND | BM SR S 20-NUD |
|---|---|---|
| Material | Stainless Steel | |
| Rail Width B1 (mm) | 20 | 20 |
| Rail Height J1 (mm) | 19 | 19 |
| Max Single Piece Length L3 (mm) | 3000 | 3000 |
| Fixing Hole Pitch L4 (mm) | 60 | 60 |
| First/Last Hole Position L5/L10 (mm) | 28.5 | 28.5 |
| Rail Weight (kg/m) | 2.2 | 2.3 |
Rail Type Description:
- ND = Standard type, top mounting, fully hardened
- NUD = Bottom tapped hole type, fully hardened
Carriage Specifications BM WR W 20
Available Types: A (Standard), B (Standard Long), C (Compact High), D (Compact High Long)
| Parameter | W 20-A | W 20-B | W 20-C | W 20-D |
|---|---|---|---|---|
| System Height A (mm) | 30 | 30 | 30 | 30 |
| Carriage Width B (mm) | 63 | 63 | 44 | 44 |
| Reference Surface Distance B2 (mm) | 21.5 | 21.5 | 12 | 12 |
| Front Center Lube Port Position C1 (mm) | 5.2 | 5.2 | 5.2 | 5.2 |
| Side Lube Port Position C3 (mm) | 5.2 | 5.2 | 5.2 | 5.2 |
| Side Lube Port Position C4 (mm) | 10.8 | 18.8 | 12.8 | 13.8 |
| Top Lube Port Position C7 (mm) | 10.3 | 18.3 | 12.3 | 13.3 |
| Carriage Height J (mm) | 25.5 | 25.5 | 25.5 | 25.5 |
| Carriage Length L (mm) | 72.5 | 88.5 | 72.5 | 88.5 |
| Outer Fixing Hole Pitch L1 (mm) | 40 | 40 | 36 | 50 |
| Inner Fixing Hole Pitch L2 (mm) | 35 | 35 | - | - |
| Body Length L6 (mm) | 51.5 | 65.5 | 49.5 | 65.5 |
| Lateral Fixing Hole Pitch N (mm) | 53 | 53 | 32 | 32 |
| Reference Surface Height O (mm) | 8 | 8 | 6 | 6 |
| Carriage Weight (kg) | 0.5 | 0.6 | 0.4 | 0.5 |
Load Ratings (BM SR Stainless Steel Version)
| Carriage Type | C0 Static Load (N) | C100 Dynamic Load (N) | M0Q Static Cross Moment (Nm) | M0L Static Longitudinal Moment (Nm) | MQ Dynamic Cross Moment (Nm) | ML Dynamic Longitudinal Moment (Nm) |
|---|---|---|---|---|---|---|
| A / C | 26,690 | 12,240 | 317 | 248 | 145 | 114 |
| B / D | 34,935 | 14,790 | 417 | 421 | 175 | 177 |
Load Rating Description
- C0 = Static load capacity
- C100 = Dynamic load capacity - 100km travel life
- M0Q / MQ = Cross moment
- M0L / ML = Longitudinal moment