R165181420 KWD-020-FNS-C1-N-1 Bosch Rexroth Ball Runner Block Carriage

The Bosch Rexroth KWD-020-FNS-C1-N-1 is a high-performance flange-base ball runner block built for demanding linear motion applications requiring rigidity, precision, and durable performance. Its FNS format (flanged width, normal block length, standard height) provides a broad mounting footprint and strong load distribution — especially useful for heavier loads and multi-direction forces. The block is size 20, made from carbon steel, and delivered pre-lubricated and sealed for long-term reliability.

Key Features

• FNS design (Flange / Normal length / Standard height) — wide mounting footprint and stable rail engagement for stronger rigidity under load. 

• Size 20 — larger profile for increased load capacity and rigidity compared to size-15 or size-10 blocks. 

• Carbon steel construction for maximum strength, durability, and resistance to deformation under heavy loads. 

• Low preload (C1) — balances preload to reduce clearance without excessive internal stress, offering reliable and stable motion for most automation tasks. 

• Accuracy class N (Standard precision) — reliable repeatability and positioning suited to CNC, automation, and general industrial motion systems. 

• Standard sealing, no ball chain (SS) — simplifies installation and maintenance, suitable for many standard industrial environments. 

• Factory pre-lubricated & preserved — ready to install, with long-term lubrication capability reducing initial maintenance and downtime.

• High rigidity and load rating in all directions — suitable where single-block-per-rail configuration is used and load may come from multiple directions (axial, side, torque). 

Technical Specifications

• Nominal size: 20 

• Runner block format: FNS — Flanged width, Normal length, Standard height 

• Material: Carbon steel (CS) 

• Preload class: C1 (Low preload / moderate preload) 

• Accuracy class: N (Standard precision) 

• Seal type: SS — Standard seal, no ball chain 

• Block weight (approx): 0.45 kg 

• Runner block width (flange): 63 mm 

• Runner block length: 75.0 mm 

• Block height (standard): 25.35 mm; block height with rail: 30 mm 

• Dynamic load capacity (C): ≈ 23,400 N 

• Static load capacity (C₀): ≈ 29,800 N 

• Dynamic torsional moment load capacity (Mt): ≈ 300 Nm 

• Dynamic longitudinal (side) moment load capacity (ML): ≈ 200 Nm 

• Maximum linear speed (vₘₐₓ): 5 m/s 

• Maximum permissible acceleration (aₘₐₓ): 500 m/s² under recommended load conditions 

• Operating ambient temperature range: –10 °C to +80 °C (short-term peaks may be permissible depending on lubrication conditions) 

Typical Applications

The KWD-020-FNS-C1-N-1 is ideal for:

• CNC milling, machining centers, routing or engraving machines needing robust, flanged rail support.

• Heavy-duty automation systems and assembly lines with significant loads or side/torque stresses.

• Robotics, pick-and-place, material-handling systems where high load capacity and smooth motion are required.

• Retrofit or maintenance of existing linear guide systems using size-20 FNS/SNS rails.

• General industrial linear motion where flange mounting and high rigidity are required over long operating lives.

Why Buy from Bearing King Ltd

By choosing the KWD-020-FNS-C1-N-1 from Bearing King Ltd, you benefit from:

• Genuine Bosch Rexroth OEM-grade ball-rail components guaranteeing spec compliance and long-term reliability.

• Competitive UK-based pricing and fast dispatch suitable for industrial and professional buyers.

• Expert advice to match rails, preload classes, lubrication schemes and installation practices.

• Pre-lubricated, ready-to-install blocks that minimize downtime and maintenance needs — ideal for both new builds and retrofit projects.