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Address: Suzhou City, Jiangsu Province, China, 215000
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Tel: 0086-512-68235075
R162221322 Original Rexroth Linear Bearing Block
BALL RUNNER BLOCK CARBON STEEL KWD-025-SNS-C1-H-1
- Size 25
- Format SNS: Width = slimline, length = normal, height = standard
- Runner block body made of unalloyed steel CS
- Preload class C1: Low preload
- Accuracy class H: High
- With 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 = 86.2 mm
- Interchangeability: The runner block and the guide rails can be combined with each other with every accuracy.
Technical Specifications
| Parameter | Value | Engineering Significance | Standard Compliance |
|---|---|---|---|
| Dynamic Load Capacity (C100) | 26,700 N (6,000 lbf) | Sustained force over 100km travel | DIN ISO 14728-1 |
| Moment Stiffness (ML50) | 340 Nm (251 lb-ft) | Resistance to rotational deflection | JIS B 1192 |
| Friction Coefficient | 0.002–0.003 | Energy efficiency in linear motion | ANSI/B93.55M |
| Operating Temperature | -0°C to +80°C (32°F to 176°F) | Stable performance across climates | CE Directive 2006/42/EC |
Test conditions: Room temperature (23°C/73°F), 50% humidity
Technical Attributes
| Version | Ball rail system |
| Nominal size [mm] | 25 |
| Format | SNS – slimline, normal, standard height |
| Model | High-precision ball runner block |
| Material | Carbon steel |
| Preload class | C1 – Low preload |
| Accuracy class | H – Highly accurate |
| Seal | SS – Standard seal |
| Ball chain | With ball chain |
| Self-aligning for compensation of misalignments | Without self-alignment |
| Width of runner block [mm] | 48 |
| Length of runner block [mm] | 86.2 |
| Height of runner block [mm] | 29.9 |
| Height runner block with guide rail [mm] | 36 |
| Lubrication | With initial lubrication and preservation |
| Dynamic load capacity C100 [N] | 26700 |
| 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.) | 0 °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] | 0.5 |
| Dynamic load capacity C50 [N] | 33600 |
| Note: dynamic load capacity C50 | Dynamic load capacity and load moments based on a travel of 50,000 m. |
| Static load capacity C0 [N] | 32300 |
| Dynamic torsional moment load capacity Mt50 [Nm] | 480 |
| 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] | 380 |
| 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] | 460 |
| Dynamic longitudinal moment load capacity ML50 [Nm] | 340 |
| 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] | 270 |
| 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] | 330 |
| 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 (profiled rail systems) [mm] | 35 |
| Dimension E3 (profiled rail systems) [mm] | 38.3 |
| Dimension E8 (profiled rail systems) [mm] | 38.3 |
| Dimension E9 (profiled rail systems) [mm] | 11.5 |
| Dimension H [mm] | 36 |
| Dimension H1 (profiled rail systems) [mm] | 29.9 |
| Dimension H2 with cover strip (profiled rail systems) [mm] | 24.45 |
| Dimension H2 without cover strip (profiled rail systems) [mm] | 24.25 |
| Dimension K1 (profiled rail systems) [mm] | 17.45 |
| Dimension K2 (profiled rail systems) [mm] | 18.6 |
| Dimension K3 (profiled rail systems) [mm] | 5.5 |
| Dimension K4 (profiled rail systems) [mm] | 5.5 |
| Dimension N3 (profiled rail systems) [mm] | 9 |
| Dimension N6 (profiled rail systems) [mm] | 15.2 |
| Dimension N6 tolerance (profiled rail systems) [mm] | ±0.5 |
| Dimension S2 (profiled rail systems) | M6 |
| Dimension S5 (profiled rail system) [mm] | 7 |
| Dimension S9 | M3x5 mm |
| Dimension S9 thread diameter (profiled rail systems) | M3 |
| Dimension S9 lead [mm] | 5 |
| Dimension T1 min [mm] | 13 |
| Dimension V1 [mm] | 7.5 |
Installation Checklist
- Verify foundation flatness ≤0.02mm/m (0.00024in/ft)
- Align reference edge within ±0.1mm (±0.004in)
- Apply DIN 51825-compliant grease (Dynalub 510 recommended)
- Torque M6 fasteners to 8.8Nm (6.5 lb-ft)
FAQ
Q: What distinguishes C1 preload from Z0 class?
A: Rexroth’s C1 preload (430N initial force) provides 25% greater moment stiffness than standard Z0 class, ideal for high-accuracy machine tools.
Q: Compatible with HIWIN rails?
A: While dimensionally similar, we recommend pairing with Rexroth linear guideways for guaranteed 36μm/m (0.00043in/ft) running parallelism.
Q: Relubrication interval?
A: 18–24 months under normal loads (≤20kN), using Mobilith SHC 100 grease (NLGI 2 grade).
Precision Medical Imaging Application
In CT scanner gantries, the R162221322 linear bearing carriage’s corrosion-resistant coating (Dacromet-treated) enables reliable operation despite frequent disinfectant exposure. The low friction coefficient (μ=0.002) permits smooth 5m/s linear motion critical for sub-millimeter imaging accuracy, meeting IEC 60601-2-44 medical equipment standards.
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