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R205C21320 Original Rexroth Linear Bearing Block
BALL RUNNER BLOCK CARBON STEEL KWE-025-SNS-C1-H-1
- Size 25
- Format SNS – slimline, normal, standard height
- Runner block body made of unalloyed steel CS
- Preload class C1: Low preload
- Accuracy class H: Highly accurate
- Without ball chain
- With initial lubrication and preservation
- Runner block body in standard version
- Overall length of the runner block = 86.2 mm
- Interchangeability: The runner block and the guide rails can be combined with each other with every accuracy.
R205C21320 Original Rexroth Linear Bearing Block Parameters
| Parameter | Value | Engineering Explanation |
|---|---|---|
| Nominal size | 25 mm | Defines the size compatibility with guide rails, ensuring proper fit in linear motion systems. |
| Format | SNS – slimline, normal, standard height | Compact design for space-constrained transverse applications, maintaining standard height for stability. |
| Preload class | C1 – Low preload | Minimizes internal forces, reducing friction and wear for smoother motion. |
| Accuracy class | H – Highly accurate | Ensures precise positioning, critical for high-precision tasks like CNC machining. |
| Seal | SS – Standard seal | Protects against dust and debris, extending service life in industrial environments. |
| Ball chain | Without ball chain (standard) | Simplifies design, reducing maintenance while maintaining performance. |
| Width of runner block | 48 mm (1.89 inches) | Compact width optimizes space in transverse-constrained setups. |
| Length of runner block | 86.2 mm (3.39 inches) | Provides sufficient contact area for stability and load distribution. |
| Height of runner block | 30 mm (1.18 inches) | Low profile height supports compact system designs. |
| Dynamic load capacity C | 21,800 N | Indicates the maximum dynamic load the block can handle during motion. |
| Static load capacity C0 | 30,600 N | Represents the maximum static load the block can withstand without deformation. |
| Maximum acceleration amax | 250 m/s² (820 ft/s²) | Supports high-speed operations; reduces to 50 m/s² under specific load conditions. |
| Maximum permissible linear speed vmax | 3 m/s (9.84 ft/s) | Defines the top speed for reliable operation without compromising accuracy. |
| Permissible ambient temperature | -10 °C to +80 °C (14 °F to 176 °F); 100 °C (212 °F) for short periods | Ensures reliable performance across a wide range of operating conditions. |
| Friction coefficient μ | 0.002–0.003 | Low friction enhances efficiency and reduces energy consumption. |
| Weight | 0.5 kg (1.1 lbs) | Lightweight design minimizes system inertia, improving responsiveness. |
Technical Attributes
| Version | Ball rail system |
| Nominal size [mm] | 25 |
| Format | SNS – slimline, normal, standard height |
| Preload class | C1 – Low preload |
| Accuracy class | H – Highly accurate |
| Seal | SS – Standard seal |
| Ball chain | Without ball chain (standard) |
| Width of runner block [mm] | 48 |
| Length of runner block [mm] | 86.2 |
| Height of runner block [mm] | 30 |
| Height runner block with guide rail [mm] | 36 |
| Lubrication | With initial lubrication and preservation |
| Dynamic load capacity C [N] | 21800 |
| Dynamic load capacity C100 [N] | 21800 |
| Maximum acceleration rate amax [m/s²] | 250 |
| Note: Max. acceleration amax | If Fcomb◡> 2.8 • Fpr : amax = 50 m/s2 |
| Maximum permissible linear speed vmax [m/s] | 3 |
| Permissible ambient temperature (min. … max.) | -10 °C … +80 °C |
| Note: permissible ambient temperature (min. … max.) | 100 °C admissible for short time. |
| Friction coefficient μ | 0.002 … 0.003 |
| Note: friction coefficient μ | Friction coefficient µ without seal friction |
| Weight [kg] | 0.5 |
| Dynamic load capacity C50 [N] | 27500 |
| Static load capacity C0 [N] | 30600 |
| Dynamic torsional moment load capacity Mt50 [Nm] | 340 |
| Dynamic torsional moment load capacity Mt100 [Nm] | 270 |
| Static torsional moment load capacity Mt0 [Nm] | 380 |
| Dynamic longitudinal moment load capacity ML50 [Nm] | 280 |
| Dynamic longitudinal moment load capacity ML100 [Nm] | 220 |
| Static longitudinal moment load capacity ML0 [Nm] | 310 |
| Pitch T guide rail [mm] | 60 |
| Dimension A (profiled rail systems) [mm] | 48 |
| Dimension A1 (profiled rail systems) [mm] | 24 |
| Dimension A2 (profiled rail systems) [mm] | 23 |
| Dimension A3 (profiled rail systems) [mm] | 12.5 |
| Dimension B (profiled rail systems) [mm] | 86.2 |
| Dimension B tolerance (profiled rail systems) [mm] | +0.5 |
| Dimension B1 [mm] | 57.8 |
| Dimension E1 [mm] | 35 |
| Dimension E2 [mm] | 35 |
| Dimension E8 (profiled rail systems) [mm] | 33 |
| Dimension E9 (profiled rail systems) [mm] | 13 |
| Dimension H [mm] | 36 |
| Dimension H1 (profiled rail systems) [mm] | 30 |
| Dimension H2 (profiled rail systems) [mm] | 20 |
| Dimension K1 (profiled rail systems) [mm] | 17.45 |
| Dimension K2 (profiled rail systems) [mm] | 17.5 |
| Dimension K3 (profiled rail systems) [mm] | 7 |
| Dimension K4 (profiled rail systems) [mm] | 7 |
| Dimension N3 (profiled rail systems) [mm] | 9 |
| Dimension N6 (profiled rail systems) [mm] | 11.3 |
| Dimension N6 tolerance (profiled rail systems) [mm] | ±0.5 |
| Dimension S2 (profiled rail systems) | M6 |
| Dimension S5 (profiled rail system) [mm] | 7 |
| Dimension S9 | M3x6.5 mm |
| Dimension S9 thread diameter (profiled rail systems) | M3 |
| Dimension S9 lead [mm] | 6.5 |
| Dimension T [mm] | 60 |
| Dimension T1 min [mm] | 13 |
| Dimension V1 [mm] | 7.5 |
| Height of guide rail H2 [mm] | 20 |
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