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Address: Suzhou City, Jiangsu Province, China, 215000
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Tel: 0086-512-68235075
R162289420 Original Rexroth Linear Bearing Block
BALL RUNNER BLOCK CARBON STEEL KWD-020-SNS-C0-N-1
- Size 20
- Format SNS: Width = slimline, length = normal, height = standard
- Runner block body made of unalloyed steel CS
- Preload class C0: Preload-free
- 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 Advantages
- 4-Way Equal Load Design: Maintains 29,800 N static load rating across all axes
- Pre-Ground Raceways: Achieve Ra 0.05μm surface finish for smooth motion
- Dynalub 510 Grease: Enables 3+ years lubrication intervals (70°C max)
Technical Specifications
| Parameter | Value | Engineering Significance | Standard Compliance |
|---|---|---|---|
| Dynamic Load C100 | 23,400 N (5,260 lbf) | 100km travel lifespan under rated load | DIN ISO 14728-1 |
| Moment Stiffness | 380 Nm (280 lb-ft) | Resists torsional deflection in press brakes | JIS B 1192 |
| Friction Coefficient | 0.002-0.003 | Enables 5 m/s (16.4 ft/s) rapid traverses | ANSI/B93.55M |
Testing conditions: 23°C ±2°, 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 | C0 – Without preload (clearance) |
| 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] | 0.35 |
| 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 (≤0.02 mm/300 mm)
- Align reference edge within 0.05° parallelism
- Apply initial torque of 4.5 Nm (40 lb-in) to M5 mounting screws
FAQ
Q: What makes Rexroth linear blocks suitable for medical imaging scanners?
A: The black oxide coating provides enhanced corrosion resistance (500hr salt spray test) while maintaining 0.002μ friction coefficient critical for sub-micron positioning.
Q: How does preload class affect linear bearing performance?
A: C0 preload (clearance fit) allows 0.12mm radial play, optimal for applications requiring thermal expansion compensation in die-casting machines.
Why we are more
affordablebetterflexible
affordablebetterflexible
No MOQ LimitSupport small batch procurement, minimum order quantity 1 piece.
Supply Chain Advantages5%-15% comprehensive cost reduction compared to traditional procurement channels.
Direct Supply From The Brand’s FactoryAll products are shipped directly from the brand’s factory, with no secondary resale, maximize your benefits.
