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Address: Suzhou City, Jiangsu Province, China, 215000
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Tel: 0086-512-68235075
R205C21420 Original Rexroth Linear Bearing Block
BALL RUNNER BLOCK CARBON STEEL KWE-025-SNS-C1-N-1
- Size 25
- 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 = 86.2 mm
- Interchangeability: The runner block and the guide rails can be combined with each other with every accuracy.
R205C21420 Original Rexroth Linear Bearing Block Specifications
The R205C21420 linear bearing block is engineered for precision and reliability. Below is a detailed comparison of its technical parameters, presented in a structured table for clarity.
| Parameter | Value | Engineering Explanation |
|---|---|---|
| Nominal Size | 25 mm | Indicates the size compatibility with 25 mm profiled rail systems, ensuring proper fit. |
| Width of Runner Block | 48 mm (1.89 in) | Defines the block’s width, critical for fitting within compact machinery layouts. |
| Length of Runner Block | 86.2 mm (3.39 in) | Specifies the block’s length, affecting stability and load distribution. |
| Height of Runner Block | 30 mm (1.18 in) | Height of the block, ensuring alignment with guide rails. |
| Height with Guide Rail | 36 mm (1.42 in) | Total height when mounted, critical for vertical space planning. |
| Dynamic Load Capacity C | 21,800 N (4,900 lbf) | Maximum dynamic load the block can handle during motion, ensuring durability. |
| Static Load Capacity C0 | 30,600 N (6,880 lbf) | Maximum static load the block can withstand without deformation. |
| Dynamic Torsional Moment Mt50 | 340 Nm (250.8 ft-lb) | Resistance to twisting forces during dynamic operation, ensuring stability. |
| Static Torsional Moment Mt0 | 380 Nm (280.3 ft-lb) | Resistance to twisting forces when stationary, critical for heavy loads. |
| Dynamic Longitudinal Moment ML50 | 280 Nm (206.5 ft-lb) | Capacity to handle longitudinal moments during motion, enhancing precision. |
| Static Longitudinal Moment ML0 | 310 Nm (228.6 ft-lb) | Resistance to longitudinal moments when stationary, ensuring rigidity. |
| Maximum Acceleration amax | 250 m/s² (820 ft/s²) | Maximum acceleration the block can handle, critical for high-speed applications. |
| Maximum Linear Speed vmax | 3 m/s (9.84 ft/s) | Maximum speed for reliable operation, balancing speed and stability. |
| Friction Coefficient μ | 0.002–0.003 | Low friction ensures smooth motion, reducing energy loss and wear. |
| Permissible Ambient Temperature | -10 °C to +80 °C (14 °F to 176 °F), 100 °C (212 °F) for short periods | Operating temperature range, ensuring performance in varied environments. |
| Weight | 0.5 kg (1.1 lb) | Lightweight design reduces system inertia, improving efficiency. |
| Pitch T Guide Rail | 60 mm (2.36 in) | Distance between mounting holes on the rail, ensuring secure installation. |
| Seal Type | SS – Standard Seal | Protects against contaminants, extending service life in dusty environments. |
Technical Attributes
| Version | Ball rail system |
| Nominal size [mm] | 25 |
| 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] | 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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