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Address: Suzhou City, Jiangsu Province, China, 215000
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Tel: 0086-512-68235075
R163221420 Original Rexroth Linear Bearing Block
BALL RUNNER BLOCK ALUMINUM KWD-025-SNS-C1-N-1
- Size 25
- Format SNS: Width = slimline, length = normal, height = standard
- Runner block body made of aluminum
- 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 = 86.2 mm
- Interchangeability: The runner block and the guide rails can be combined with each other with every accuracy.
Key Product Features
The Rexroth R163221420 linear bearing block is engineered for versatility and precision. Its aluminum construction reduces weight while maintaining robust load capacities, ideal for lightweight design applications. The optimized entry-zone geometry, paired with a high number of balls, minimizes elastic deflection, boosting travel accuracy by up to six times. This linear carriage features a low preload class (C1) and standard accuracy class (N), ensuring smooth operation with minimal system play. Limitless interchangeability allows combination with all SNS ball guide rails, while pre-drilled holes and top-mounted attachment capabilities simplify installation. With integrated oil reservoirs and metal-threaded lube connections, it supports long-term lubrication, reducing downtime in demanding environments.
Technical Specifications
The table below outlines the critical technical parameters of the Rexroth R163221420 linear bearing block, providing engineers with precise data for integration into motion control systems.
| Parameter | Value | Engineering Explanation |
|---|---|---|
| Nominal size | 25 mm | Defines the size category, ensuring compatibility with matching guide rails. |
| Width of runner block | 48 mm (1.89 in) | Specifies the block’s width, critical for fitting within system constraints. |
| Length of runner block | 86.2 mm (3.39 in) | Indicates the block’s length, affecting mounting and travel distance. |
| Height of runner block | 29.9 mm (1.18 in) | Measures the block’s height, ensuring proper alignment with rails. |
| Height with guide rail | 36 mm (1.42 in) | Total height including rail, key for system clearance. |
| Dynamic load capacity C100 | 28600 N (6429 lbf) | Maximum load the block can handle over 100,000 m travel, per DIN ISO 14728-1. |
| Dynamic load capacity C50 | 36000 N (8093 lbf) | Load capacity for 50,000 m travel, offering higher capacity for shorter distances. |
| Maximum dynamic load Fmax | 8800 N (1978 lbf) | Peak dynamic load the block can withstand during operation. |
| Maximum acceleration amax | 500 m/s² (1640 ft/s²) | Maximum acceleration, reduced to 50 m/s² if combined forces exceed preload limits. |
| Maximum permissible linear speed vmax | 5 m/s (16.4 ft/s) | Top speed for reliable operation, ensuring stability. |
| Maximum permissible torsional moment Mt max | 125 Nm (92.2 ft-lb) | Maximum twisting force the block can endure. |
| Maximum permissible longitudinal load moment ML max | 70 Nm (51.6 ft-lb) | Maximum longitudinal force, critical for load distribution. |
| Friction coefficient μ | 0.002 … 0.003 | Low friction ensures smooth motion, excluding seal friction. |
| Weight | 0.31 kg (0.68 lb) | Lightweight design enhances efficiency in dynamic applications. |
| Permissible ambient temperature | -10 °C to +80 °C (14 °F to 176 °F), 100 °C (212 °F) short-term | Operating temperature range, with short-term high-temperature tolerance. |
| Pitch T guide rail | 60 mm (2.36 in) | Distance between rail mounting holes, ensuring secure attachment. |
Technical Attributes
| Version | Ball rail system |
| Nominal size [mm] | 25 |
| Format | SNS – slimline, normal, standard height |
| Model | High-precision ball runner block |
| Material | Aluminum |
| 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] | 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 |
| Maximum dynamic load Fmax [N] | 8800 |
| Dynamic load capacity C100 [N] | 28600 |
| 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 |
| Maximum permissible torsional moment Mt max [Nm] | 125 |
| Maximum permissible longitudinal load moment ML max [Nm] | 70 |
| 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] | 0.31 |
| Dynamic load capacity C50 [N] | 36000 |
| Note: dynamic load capacity C50 | Dynamic load capacity and load moments based on a travel of 50,000 m. |
| Dynamic torsional moment load capacity Mt50 [Nm] | 520 |
| 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] | 410 |
| 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. |
| Dynamic longitudinal moment load capacity ML50 [Nm] | 370 |
| 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] | 290 |
| 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. |
| 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 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 S11 (profiled rail systems) [mm] | 5.7 |
| 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 |
FAQ
1. What is the primary material of the Rexroth R163221420 linear bearing block?
The block is made of aluminum, offering a 60% weight reduction compared to steel versions.
2. Can the R163221420 be used with different guide rails?
Yes, it features limitless interchangeability with all SNS ball guide rails within its accuracy class.
3. What is the maintenance requirement for this linear carriage?
It comes pre-lubricated with Dynalub 510 grease, supporting long-term lubrication for years with minimal maintenance.
4. What are the load capacities of the R163221420?
It has a dynamic load capacity of 28600 N (C100) and 36000 N (C50), based on 100,000 m and 50,000 m travel, respectively.
5. Is the R163221420 suitable for high-speed applications?
Yes, it supports a maximum permissible linear speed of 5 m/s, ideal for dynamic motion control.
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