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Address: Suzhou City, Jiangsu Province, China, 215000
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Tel: 0086-512-68235075
R162121320 Original Rexroth Linear Bearing Block
BALL RUNNER BLOCK CARBON STEEL KWD-025-SNH-C1-H-1
- Format SNH: Width = slimline, length = normal, height = high
- 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 = 86.2 mm
Technical Advantages
R162121320 linear bearing block delivers 6x higher travel accuracy than conventional models. Its recirculating ball bearing system achieves an ultra-low friction coefficient of 0.002-0.003, certified under DIN ISO 14728-1 standards. The C1 preload class ensures smooth operation in precision linear motion systems while maintaining 28,600N dynamic load capacity (C100) – equivalent to supporting 2,917kg (6,430 lbs) at 5m/s velocity.
Technical Specifications
| Parameter | Value | Engineering Significance | Standard Compliance |
|---|---|---|---|
| Dynamic Load Capacity (C100) | 28,600 N (6,430 lbf) | Maximum sustained load over 100km travel | DIN ISO 14728-1 |
| Friction Coefficient (μ) | 0.002-0.003 | Reduced energy consumption in linear motion systems | JIS B 1192 |
| Moment Stiffness (Mt50) | 520 Nm (383 lb-ft) | Resistance to torsional deformation under load | ANSI/B93.55M |
Testing conditions: 23°C ±2°C, 50% RH | Load calculation: Fpr = C0/18 (per ISO 14728-2)
| Product attributes | |
|---|---|
| Version | Ball rail system |
| Nominal size [mm] | 25 |
| Format | SNH – slimline, normal, high |
| 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 | 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] | 33.9 |
| Height runner block with guide rail [mm] | 40 |
| Lubrication | With initial lubrication and preservation |
| 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 |
| 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] | 0.6 |
| 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. |
| Static load capacity C0 [N] | 35900 |
| 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. |
| Static torsional moment load capacity Mt0 [Nm] | 510 |
| 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. |
| Static longitudinal moment load capacity ML0 [Nm] | 360 |
| 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] | 15.5 |
| Dimension H [mm] | 40 |
| Dimension H1 (profiled rail systems) [mm] | 33.9 |
| 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] | 9.5 |
| Dimension K4 (profiled rail systems) [mm] | 9.5 |
| 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
- Foundation flatness: ≤0.02mm/m (0.00024in/ft)
- Mounting torque: M6 fasteners @ 8.5Nm ±10% (75.2 lb-in)
- Preload verification: 5μm maximum deflection under 50% C0
- Lubrication volume: 1.2cm³ per bearing carriage
Industry Certifications
- ISO 14728-1:2015 (Linear Motion Rolling Bearings)
- CE Marking: 2006/42/EC Machinery Directive
- RoHS 3 (2015/863/EU) Compliant
- TÜV Certified (EN ISO 13849-1 PL e)
FAQ
Q: What makes Rexroth linear guide blocks compatible with SNS/SNO rails?
A: The patented Gothic arch profile maintains ≤15μm parallelism tolerance (DIN H class) across all rail combinations.
Q: How does the corrosion resistance compare to AISI 440C stainless models?
A: Carbon steel units feature 12μm electroless nickel plating, achieving 500hr salt spray resistance per ASTM B117.
Q: What lubrication interval is recommended for high-speed applications?
A: At 5m/s operation, relubricate every 800km travel using DIN 51825 KP2K-20 grease.
Dimensional reference: 86.2mm length = 3.39″ | 40mm height = 1.57″ | Load capacity 28,600N = 6,430lbf
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