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R167121320 Original Rexroth Linear Bearing Block
BALL RUNNER BLOCK CARBON STEEL KWD-025-BNS-C1-H-1
- Size 25
- Format BNS: Width = wide, length = normal, height = standard
- Runner block body made of unalloyed steel CS
- Preload class C1: Low preload
- Accuracy class H: High
- Without ball chain
- With initial lubrication and preservation
- Roller bearing grease Dynalub 510
- 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 = 105.0 mm
- Interchangeability: The runner block and the guide rails can be combined with each other with every accuracy.
R167121320 Original Rexroth Linear Bearing Block Specifications
The Bosch Rexroth R167121320 is engineered for precision and reliability. Below is a detailed comparison of its key technical parameters, including metric and imperial conversions for global applicability.
| Parameter | Value | Engineering Explanation |
|---|---|---|
| Size | 25/70 | Nominal size of the linear bearing block, indicating compatibility with 25 mm (0.984 in) wide rails and 70 mm (2.756 in) overall width. |
| Width of runner block (A) | 120 mm (4.724 in) | Total width, ensuring stable load distribution across the rail. |
| Height of runner block (H) | 35 mm (1.378 in) | Vertical height, contributing to a compact yet robust design. |
| Length of runner block (B) | 105 mm (4.134 in) | Overall length, balancing stability and dynamic performance. |
| Dynamic load capacity (C) | 36200 N | Maximum load the block can handle during motion, based on 100,000 m travel (multiply by 1.26 for 50,000 m comparison). |
| Static load capacity (C0) | 50200 N | Maximum load the block can withstand when stationary, ensuring structural integrity. |
| Dynamic torsional moment load capacity (Mt) | 1350 Nm | Ability to resist twisting forces during dynamic operation, critical for high-torsion applications. |
| Static torsional moment load capacity (Mt0) | 1870 Nm | Resistance to twisting forces when stationary, enhancing system stability. |
| Dynamic longitudinal moment load capacity (ML) | 490 Nm | Capacity to handle longitudinal moments during motion, ensuring smooth performance. |
| Static longitudinal moment load capacity (ML0) | 680 Nm | Longitudinal moment resistance when stationary, supporting heavy loads. |
| Friction coefficient (μ) | 0.002 … 0.003 | Low friction ensures energy-efficient motion and reduced wear. |
| Maximum acceleration (amax) | 500 m/s² | Supports high-speed applications with rapid acceleration, limited to 50 m/s² under combined loads. |
| Maximum permissible linear speed (vmax) | 5 m/s | Ensures high-speed operation without compromising stability. |
| Permissible ambient temperature | -10 °C to +80 °C (14 °F to 176 °F), up to 100 °C (212 °F) for short periods | Wide temperature range supports diverse industrial environments. |
| Weight | 1.350 kg (2.976 lbs) | Lightweight yet durable, balancing ease of installation with strength. |
| Material | Carbon steel | High-strength material ensures durability and resistance to wear. |
| Seal type | SS – Standard seal, without ball chain | Protects internal components from contaminants, enhancing longevity. |
| Preload class | C1 – Low preload | Reduces internal forces, ensuring smooth motion and minimal wear. |
| Accuracy class | H – Highly accurate | Delivers precise positioning for high-precision applications. |
Technical Attributes
| Version | Ball rail system |
| Nominal size [mm] | 25/70 |
| Format | BNS – wide, normal, standard height |
| Model | Wide ball runner block |
| Material | Carbon steel |
| Preload class | C1 – Low preload |
| Accuracy class | H – Highly accurate |
| Seal | SS – Standard seal |
| Ball chain | Without ball chain (standard) |
| Self-aligning for compensation of misalignments | Without self-alignment |
| Width of runner block [mm] | 120 |
| Length of runner block [mm] | 105 |
| Height of runner block [mm] | 29.75 |
| Height runner block with guide rail [mm] | 35 |
| Lubrication | With initial lubrication and preservation |
| Dynamic load capacity C100 [N] | 36200 |
| 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] | 500 |
| Note: Max. acceleration amax | If Fcomb◡> 2.8 • Fpr : amax = 50 m/s2 |
| Maximum permissible linear speed vmax [m/s] | 5 |
| Permissible ambient temperature (min. … max.) | -10 °C … +80 °C |
| Note: permissible ambient temperature (min. … max.) | 100 °C admissible for short time. For operation at negative temperatures, please consult us. |
| Friction coefficient μ | 0.002 … 0.003 |
| Note: friction coefficient μ | Without friction of seal |
| Weight [kg] | 1.35 |
| Dynamic load capacity C50 [N] | 45600 |
| Note: dynamic load capacity C50 | Dynamic load capacity and load moments based on a travel of 50,000 m. |
| Static load capacity C0 [N] | 50200 |
| Dynamic torsional moment load capacity Mt50 [Nm] | 1700 |
| 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] | 1350 |
| 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] | 1870 |
| Dynamic longitudinal moment load capacity ML50 [Nm] | 620 |
| 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] | 490 |
| 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] | 680 |
| Pitch T guide rail [mm] | 80 |
| Dimension A (profiled rail systems) [mm] | 120 |
| Dimension A1 (profiled rail systems) [mm] | 60 |
| Dimension A2 (profiled rail systems) [mm] | 69 |
| Dimension A3 (profiled rail systems) [mm] | 25.5 |
| Dimension B (profiled rail systems) [mm] | 105 |
| Dimension B1 [mm] | 76.5 |
| Dimension E1 [mm] | 107 |
| Dimension E2 (profiled rail systems) [mm] | 60 |
| Dimension E8 (profiled rail systems) [mm] | 35 |
| Dimension E8.1 (profiled rail systems) [mm] | 83.5 |
| Dimension E9 (profiled rail systems) [mm] | 4.9 |
| Dimension E9.1 (profiled rail systems) [mm] | 11.3 |
| Dimension H [mm] | 35 |
| Dimension H1 (profiled rail systems) [mm] | 29.75 |
| Dimension H2 (profiled rail systems) [mm] | 23.55 |
| Dimension K1 (profiled rail systems) [mm] | 15.4 |
| Dimension K2 (profiled rail systems) [mm] | 15.5 |
| Dimension K3 (profiled rail systems) [mm] | 5.2 |
| Dimension K4 (profiled rail systems) [mm] | 5.2 |
| Dimension N1 (profiled rail systems) [mm] | 9.35 |
| Dimension N2 (profiled rail systems) [mm] | 7.05 |
| Dimension N6 (profiled rail systems) [mm] | 14.4 |
| Dimension N6 tolerance (profiled rail systems) [mm] | ±0.5 |
| Dimension S1 (profiled rail systems) [mm] | 6.7 |
| Dimension S2 (profiled rail systems) | M8 |
| Dimension S5 (profiled rail system) [mm] | 7 |
| Dimension S9 | M3x2 mm |
| Dimension S9 thread diameter (profiled rail systems) | M3 |
| Dimension S9 thread diameter x lead with tolerance (profiled rail systems) [mm] | +4.5 |
| Dimension S9 lead [mm] | 2 |
| Dimension T1 min [mm] | 10 |
| Dimension V1 [mm] | 7.5 |
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