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R18212222X Original Rexroth Linear Bearing Block
ROLLER RUNNER BLOCK CARBON STEEL RWD-025-SNH-C2-P-2
- Size 25
- Format SNH: Width = slimline, length = normal, height = high
- Runner block body made of unalloyed steel CS
- Preload class C2: Medium preload
- Accuracy class P: Precision
- Without roller chain
- Preserved
- Without initial lubrication
- Without attachment element, left (front reference edge)
- Without attachment element, right (front reference edge)
- Straight lube connection loosely attached.
- Runner block body in standard version
- Overall length of the runner block = 97.0 mm
- Interchangeability: The runner block and the guide rails can be combined with each other with every accuracy.
R18212222X Original Rexroth Linear Bearing Block Specifications
The Bosch Rexroth R18212222X linear bearing block is designed to meet stringent industrial standards, with dynamic and static load capacities calculated per DIN ISO 14728-1 for a 100,000-meter travel distance. Below is a detailed comparison of its key technical parameters, including metric and imperial conversions for clarity.
| Parameter | Value | Engineering Explanation |
|---|---|---|
| Nominal Size | 25 mm (0.984 in) | Defines the standard size for compatibility with corresponding guide rails. |
| Width of Runner Block | 48 mm (1.890 in) | Determines the block’s lateral dimension for fitting onto the rail. |
| Length of Runner Block | 97 mm (3.819 in) | Specifies the block’s longitudinal dimension, affecting load distribution. |
| Height of Runner Block | 34 mm (1.339 in) | Indicates the vertical dimension, critical for system clearance. |
| Height with Guide Rail | 40 mm (1.575 in) | Total height when mounted, essential for installation planning. |
| Dynamic Load Capacity C100 | 26900 N | Maximum load the block can handle dynamically over 100,000 meters. |
| Dynamic Load Capacity C50 | 33100 N | Load capacity for a 50,000-meter travel, multiplied by 1.23 for comparison. |
| Static Load Capacity C0 | 59500 N | Maximum static load the block can withstand without deformation. |
| Dynamic Torsional Moment Mt100 | 348 Nm | Torsional load capacity for dynamic conditions over 100,000 meters. |
| Static Torsional Moment Mt0 | 770 Nm | Maximum static torsional load the block can endure. |
| Dynamic Longitudinal Moment ML100 | 260 Nm | Longitudinal moment capacity for dynamic loads over 100,000 meters. |
| Static Longitudinal Moment ML0 | 580 Nm | Maximum static longitudinal moment capacity. |
| Maximum Acceleration amax | 150 m/s² | Maximum acceleration under preload, critical for high-speed applications. |
| Maximum Linear Speed vmax | 4 m/s | Top speed the block can achieve without compromising performance. |
| Friction Coefficient μ | 0.0004 – 0.001 | Low friction ensures smooth motion and energy efficiency. |
| Permissible Ambient Temperature | -10 °C to +80 °C (14 °F to 176 °F), brief peaks to 100 °C (212 °F) | Operating temperature range, with consultation advised for extremes. |
| Weight | 0.68 kg (1.5 lbs) | Lightweight design reduces system inertia. |
| Seal Type | DS – Double-lip seal | Provides robust protection against dust and contaminants. |
| Preload Class | C2 – Medium preload | Ensures optimal balance between rigidity and smooth motion. |
| Accuracy Class | P – Precise | Guarantees high precision for demanding applications. |
Technical Attributes
| Version | Roller rail systems |
| Nominal size [mm] | 25 |
| Format | SNH – slimline, normal, high |
| Model | High-precision roller runner block |
| Material | Carbon steel |
| Preload class | C2 – Medium preload |
| Accuracy class | P – Precise |
| Seal | DS – Double-lip seal |
| Width of runner block [mm] | 48 |
| Length of runner block [mm] | 97 |
| Height of runner block [mm] | 34 |
| Height runner block with guide rail [mm] | 40 |
| Lubrication | With preservation and without initial lubrication |
| Dynamic load capacity C100 [N] | 26900 |
| Note: dynamic load capacity C100 | Dynamic load capacities and load moments are based on a stroke travel of 100,000 m according to DIN ISO 14728-1. |
| Maximum acceleration rate amax [m/s²] | 150 |
| Note: Max. acceleration amax | Requirement: There must be preload, even during operation under load. |
| Maximum permissible linear speed vmax [m/s] | 4 |
| Permissible ambient temperature (min. … max.) | -10 °C … +80 °C |
| Note: permissible ambient temperature (min. … max.) | 100 °C admissible for a short time. For operation at lower minus temperatures, please consult us. |
| Friction coefficient μ | 0.0004 … 0.001 |
| Note: friction coefficient μ | Without friction of seal |
| Weight [kg] | 0.68 |
| Dynamic load capacity C50 [N] | 33100 |
| Note: dynamic load capacity C50 | Dynamic load capacity and load moments based on a travel of 50,000 m. |
| Static load capacity C0 [N] | 59500 |
| Dynamic torsional moment load capacity Mt50 [Nm] | 430 |
| Note: Dynamic torsional moment load capacity Mt50 | Dynamic load capacity and load moments based on a travel of 50,000 m. |
| Dynamic torsional moment load capacity Mt100 [Nm] | 348 |
| Note: Dynamic torsional moment load capacity Mt100 | Dynamic load capacities and load moments are based on a stroke travel of 100,000 m according to DIN ISO 14728-1. |
| Static torsional moment load capacity Mt0 [Nm] | 770 |
| Dynamic longitudinal moment load capacity ML50 [Nm] | 320 |
| Note: Dynamic longitudinal moment load capacity ML50 | Dynamic load capacity and load moments based on a travel of 50,000 m. |
| Dynamic longitudinal moment load capacity ML100 [Nm] | 260 |
| Note: Dynamic longitudinal moment load capacity ML100 | Dynamic load capacities and load moments are based on a stroke travel of 100,000 m according to DIN ISO 14728-1. |
| Static longitudinal moment load capacity ML0 [Nm] | 580 |
| Footnote friction force FR | Guideline value for frictional drags of the complete, sealed and lubricated roller runner block. |
| Pitch T guide rail [mm] | 30 |
| 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 |
| Dimension B (profiled rail systems) [mm] | 97 |
| Dimension B1 [mm] | 63.5 |
| Dimension diameter S5 (profiled rail systems) | 7 |
| Dimension E1 [mm] | 35 |
| Dimension E2 (profiled rail systems) [mm] | 35 |
| Dimension E8 (profiled rail systems) [mm] | 33.4 |
| Dimension E9 (profiled rail systems) [mm] | 12.3 |
| Dimension H [mm] | 40 |
| Dimension H1 (profiled rail systems) [mm] | 34 |
| Dimension H2 with cover strip (profiled rail systems) [mm] | 23.6 |
| Dimension H2 without cover strip (profiled rail systems) [mm] | 23.4 |
| Dimension K1 (profiled rail systems) [mm] | 19.05 |
| Dimension N3 (profiled rail systems) [mm] | 8 |
| Dimension N6 (profiled rail systems) [mm] | 14.3 |
| Dimension N6 tolerance (profiled rail systems) [mm] | ±0.5 |
| Dimension S2 (profiled rail systems) | M6 |
| Dimension S9 | M3 |
| Dimension S9 thread diameter (profiled rail systems) | M3 |
| Dimension T1 min [mm] | 13 |
| Dimension V1 [mm] | 7.5 |
| Note of Dimension T | Dimension T = Rail separation of the roller guide rail |
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