Rexroth R167259420
Linear Guide Block
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Ball runner block, CNS, size 20, steel CS, accuracy standard, preload-free, without ball chain
The ball runner block is highly precise and characterized by the following product features:
Size 20
Format CNS: Width = compact, 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 = 73.0 mm
Interchangeability: The runner block and the guide rails can be combined with each other with every accuracy.
Area of application: For high torsional moments on rails with restricted lateral space
The same high load ratings in all four main directions of loading
Long-term lubrication is possible over several years
Excellent dynamic characteristics
High torque load capacity
Attachments on the ball runner block can be mounted from above
Integrated all-round sealing
Improved rigidity under lift-off and side loading conditions due to two additional mounting screw holes at the center of the ball runner block
Can be used on all BNS ball guide rails
Wide range of accessories
End-face fastening thread for all attachments
Optimized entry-zone geometry and high number of balls minimize variation in elastic deflection
Maximum system rigidity due to preloaded O-arrangement
Very high torsional moment load capacity and very high torsion resistance – therefore primarily used as an individual guide
Ball runner block pre-lubricated at the factory
Specifications
Nominal size - 20/40mm
Format - CNS - compact, normal, standard height
Ball chain - Without ball chain (standard)
Material (profiled rail systems) - Carbon steel
Preload class - C0 – Without preload (clearance)
Accuracy class - N - normal
Self-aligning for compensation of misalignments - Without self-alignment
Width of runner block - 62mm
Length of runner block - 73mm
Height of runner block - 22.5mm
Height of runner block with guide rail - 27mm
Lubrication - With initial lubrication and preservation
Dynamic load capacity C [N] - 14900
Footnote dynamic load capacity C - Determination of the dynamic load capacities and load moments is based on a 100 000 m travel as per DIN ISO 14728-1. Often only 50 000 m are actually stipulated. For comparison: Multiply values C, Mt and ML from the table by 1.26.
Dynamic torsional moment load capacity Mt footnote -
Determination of the dynamic load capacities and load moments is based on a 100 000 m travel as per DIN ISO 14728-1. Often only 50 000 m are actually stipulated. For comparison: Multiply values C, Mt and ML from the table by 1.26.
Static longitudinal moment load capacity ML0 [Nm] - 190
Static torsional moment load capacity Mt0 [Nm] - 470
Max. acceleration 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
Dynamic torsional moment load capacity Mt [Nm] - 340
Dynamic longitudinal moment load capacity ML [Nm] - 140
Dynamic longitudinal moment load capacity ML footnote - Determination of the dynamic load capacities and load moments is based on a 100 000 m travel as per DIN ISO 14728-1. Often only 50 000 m are actually stipulated. For comparison: Multiply values C, Mt and ML from the table by 1.26.
Seal - SS – Standard seal
Static load rating C0 [N] - 20600
Permissible ambient temperature - -10 °C ... +80 °C
Footnote 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
Footnote friction coefficient μ - Without friction of seal
Size footnote - Attention: Ball runner blocks, not combinable with ball guide rail R167. 8.. ..!