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R205C81420 Original Rexroth Linear Bearing Block
BALL RUNNER BLOCK CARBON STEEL KWE-020-SNS-C1-N-1
- Size 20
- Format SNS – slimline, normal, standard height
- Runner block body made of unalloyed steel CS
- Preload class C1: Low preload
- Accuracy class N: Standard
- Without ball chain
- With initial lubrication and preservation
- Runner block body in standard version
- Overall length of the runner block = 75 mm
- Interchangeability: The runner block and the guide rails can be combined with each other with every accuracy.
R205C81420 Original Rexroth Linear Bearing Block Specifications
The following table outlines the key technical parameters of the Rexroth B.RUNNER BLOCK CS KWE-020-SNS-C1-N-1 (R205C81420), providing a clear comparison of its capabilities.
| Parameter | Value | Engineering Explanation |
|---|---|---|
| Nominal Size | 20 mm (0.79 inches) | Defines the size category, ensuring compatibility with 20 mm guide rails. |
| Format | SNS – Slimline, Normal, Standard Height | Indicates a compact design for space-constrained applications. |
| Width of Runner Block | 44 mm (1.73 inches) | Determines the transverse space required for installation. |
| Length of Runner Block | 75 mm (2.95 inches) | Specifies the longitudinal dimension, affecting rail interaction. |
| Height of Runner Block | 25.3 mm (1 inch) | Measures vertical space, critical for system integration. |
| Dynamic Load Capacity C | 14,600 N | Maximum load the block can handle during motion, ensuring stability. |
| Static Load Capacity C0 | 19,600 N | Maximum stationary load, indicating structural strength. |
| Dynamic Torsional Moment Load Capacity Mt50 | 190 Nm | Resistance to twisting forces during dynamic operation. |
| Static Torsional Moment Load Capacity Mt0 | 210 Nm | Resistance to twisting forces when stationary. |
| Maximum Acceleration amax | 250 m/s² (820 ft/s²) | Maximum acceleration supported, critical for high-speed applications. |
| Maximum Permissible Linear Speed vmax | 3 m/s (9.84 ft/s) | Top speed for safe and efficient operation. |
| Friction Coefficient μ | 0.002–0.003 | Low friction ensures smooth motion and energy efficiency. |
| Weight | 0.35 kg (0.77 lbs) | Lightweight design minimizes system inertia. |
| Permissible Ambient Temperature | -10°C to +80°C (14°F to 176°F) | Operating temperature range, with short-term tolerance to 100°C (212°F). |
| Pitch T Guide Rail | 60 mm (2.36 inches) | Distance between mounting holes on the guide rail, aiding alignment. |
Technical Attributes
| Version | Ball rail system |
| Nominal size [mm] | 20 |
| Format | SNS – slimline, normal, standard height |
| Preload class | C1 – Low preload |
| Accuracy class | N – Normal |
| Seal | SS – Standard seal |
| Ball chain | Without ball chain (standard) |
| Width of runner block [mm] | 44 |
| Length of runner block [mm] | 75 |
| Height of runner block [mm] | 25.3 |
| Height runner block with guide rail [mm] | 30 |
| Lubrication | With initial lubrication and preservation |
| Dynamic load capacity C [N] | 14600 |
| Dynamic load capacity C100 [N] | 14600 |
| 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] | 0.35 |
| Dynamic load capacity C50 [N] | 18400 |
| Static load capacity C0 [N] | 19600 |
| Dynamic torsional moment load capacity Mt50 [Nm] | 190 |
| Dynamic torsional moment load capacity Mt100 [Nm] | 150 |
| Static torsional moment load capacity Mt0 [Nm] | 210 |
| Dynamic longitudinal moment load capacity ML50 [Nm] | 160 |
| Dynamic longitudinal moment load capacity ML100 [Nm] | 130 |
| Static longitudinal moment load capacity ML0 [Nm] | 170 |
| Pitch T guide rail [mm] | 60 |
| Dimension A (profiled rail systems) [mm] | 44 |
| Dimension A1 (profiled rail systems) [mm] | 22 |
| Dimension A2 (profiled rail systems) [mm] | 20 |
| Dimension A3 (profiled rail systems) [mm] | 12 |
| Dimension B (profiled rail systems) [mm] | 75 |
| Dimension B tolerance (profiled rail systems) [mm] | +0.5 |
| Dimension B1 [mm] | 49.6 |
| Dimension E1 [mm] | 32 |
| Dimension E2 [mm] | 36 |
| Dimension E8 (profiled rail systems) [mm] | 29 |
| Dimension E9 (profiled rail systems) [mm] | 10.15 |
| Dimension H [mm] | 30 |
| Dimension H1 (profiled rail systems) [mm] | 25.3 |
| Dimension H2 (profiled rail systems) [mm] | 17 |
| Dimension K1 (profiled rail systems) [mm] | 13.8 |
| Dimension K2 (profiled rail systems) [mm] | 13.8 |
| Dimension K3 (profiled rail systems) [mm] | 5.65 |
| Dimension K4 (profiled rail systems) [mm] | 5.65 |
| Dimension N3 (profiled rail systems) [mm] | 7.5 |
| Dimension N6 (profiled rail systems) [mm] | 10 |
| Dimension N6 tolerance (profiled rail systems) [mm] | ±0.5 |
| Dimension S2 (profiled rail systems) | M5 |
| Dimension S5 (profiled rail system) [mm] | 6 |
| Dimension S9 | M2,5×6 mm |
| Dimension S9 thread diameter (profiled rail systems) | M2,5 |
| Dimension S9 lead [mm] | 6 |
| Dimension T [mm] | 60 |
| Dimension T1 min [mm] | 13 |
| Dimension V1 [mm] | 6 |
| Height of guide rail H2 [mm] | 17 |
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