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Address: Suzhou City, Jiangsu Province, China, 215000
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Tel: 0086-512-68235075
R162281420 Original Rexroth Linear Bearing Block
BALL RUNNER BLOCK CARBON STEEL KWD-020-SNS-C1-N-1
- Size 20
- Format SNS: Width = slimline, length = normal, height = standard
- 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
- 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 = 75.0 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 C100 | 23,400 N (5,260 lbf) | 100,000m travel lifespan | DIN ISO 14728-1 |
| Static Load C0 | 29,800 N (6,700 lbf) | Maximum instantaneous load | ANSI/B93.55M |
| Moment Stiffness | 380 Nm (280 lb-ft) | Torsional deflection resistance | JIS B 1192 |
Test conditions: 23°C ambient, 50% RH
Technical Attributes
| Version | Ball rail system |
| Nominal size [mm] | 20 |
| Format | SNS – slimline, normal, standard height |
| Model | High-precision ball runner block |
| Material | Carbon steel |
| Preload class | C1 – Low preload |
| Accuracy class | N – Normal |
| Seal | SS – Standard seal |
| Ball chain | Without ball chain (standard) |
| Self-aligning for compensation of misalignments | Without self-alignment |
| Width of runner block [mm] | 44 |
| Length of runner block [mm] | 75 |
| Height of runner block [mm] | 25.35 |
| Height runner block with guide rail [mm] | 30 |
| Lubrication | With initial lubrication and preservation |
| Dynamic load capacity C100 [N] | 23400 |
| 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] | 0.36 |
| Dynamic load capacity C50 [N] | 29500 |
| Note: dynamic load capacity C50 | Dynamic load capacity and load moments based on a travel of 50,000 m. |
| Static load capacity C0 [N] | 29800 |
| Dynamic torsional moment load capacity Mt50 [Nm] | 380 |
| 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] | 300 |
| 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] | 380 |
| Dynamic longitudinal moment load capacity ML50 [Nm] | 250 |
| 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] | 200 |
| 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] | 260 |
| 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 (profiled rail systems) [mm] | 36 |
| Dimension E8 (profiled rail systems) [mm] | 32.5 |
| Dimension E9 (profiled rail systems) [mm] | 7.3 |
| Dimension H [mm] | 30 |
| Dimension H1 (profiled rail systems) [mm] | 25.35 |
| Dimension H2 with cover strip (profiled rail systems) [mm] | 20.75 |
| Dimension H2 without cover strip (profiled rail systems) [mm] | 20.55 |
| Dimension K1 (profiled rail systems) [mm] | 13.8 |
| Dimension K2 (profiled rail systems) [mm] | 13.8 |
| Dimension K3 (profiled rail systems) [mm] | 3.35 |
| Dimension K4 (profiled rail systems) [mm] | 3.35 |
| Dimension N3 (profiled rail systems) [mm] | 7.5 |
| Dimension N6 (profiled rail systems) [mm] | 13.2 |
| Dimension N6 tolerance (profiled rail systems) [mm] | ±0.5 |
| Dimension S2 (profiled rail systems) | M5 |
| Dimension S5 (profiled rail system) [mm] | 6 |
| 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] | 6 |
Installation Checklist
- Verify foundation flatness ≤0.01mm/m
- Apply 15N·m torque to M5 mounting bolts
- Align front reference edge within ±0.1°
FAQ
- 1. How does preload class affect performance?
- C1 preload minimizes stick-slip phenomenon while maintaining <0.005mm elastic deflection
- 2. Compatibility with Rexroth guide rails?
- Interchangeable with all SNS/SNO series rails per DIN 6485 specifications
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