Home » R165129420 KWD-025-FNS-C0-N-1 Bosch Rexroth Ball Runner Block Carriage

R165129420 KWD-025-FNS-C0-N-1 Bosch Rexroth Ball Runner Block Carriage

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SKU: R165129420-REXROTH
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Ball runner block, FNS, size 25, steel CS, accuracy standard, preload-free, without ball chain
£114.30 inc.VAT
£95.25 exc.VAT
All prices exclude VAT unless otherwise stated
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Product details

  • Vendor Bosch Rexroth
  • SKU R165129420-REXROTH
  • Inside diameter (d) 25mm
Description Shipping Information Returns

The Bosch Rexroth KWD-025-FNS-C0-N-1 is a heavy-duty flange-mount ball runner block engineered for smooth, reliable performance in large linear motion systems. As part of the FNS series (flange width, normal block length, standard height), it offers a broad, stable mounting base combined with excellent travel stability and strong load-carrying capability. Manufactured from premium carbon steel and supplied pre-lubricated, this size-25 block is ideal for demanding automation, machining and industrial handling applications.

Key Features

  • FNS design (Flange / Normal length / Standard height) — wide flange base provides secure, rigid mounting for high-load applications.

  • Size 25 — designed for larger linear systems requiring greater load capacity and robustness.

  • Carbon steel construction — delivers high rigidity, strength and long-term durability under continuous load.

  • C0 preload (preload-free) — enables smooth, low-resistance travel with minimal rolling friction; ideal when preload stiffness is not required.

  • Accuracy class N — dependable general-purpose accuracy for industrial automation and machinery.

  • Standard sealing (SS) — effective protection for most industrial environments.

  • Pre-lubricated & sealed — ready to install, with minimal start-up maintenance.

  • High load and moment capacities — suitable for multi-directional forces and demanding operating conditions.

  • Compatible with Bosch Rexroth size-25 FLS, FNS and SNS rails.

Technical Specifications

  • Nominal size: 25 mm

  • Block format: FNS — Flange width, Normal length, Standard height

  • Material: Carbon steel

  • Preload class: C0 (Preload-free / clearance type)

  • Accuracy class: N (Standard precision)

  • Seal type: Standard seal (SS), without ball chain

  • Flange width: approx. 70 mm

  • Block length: approx. 86 mm

  • Height with rail: around 36 mm

  • Approximate weight: ≈ 0.80–0.85 kg

  • Dynamic load capacity (C): ≈ 34,000–36,000 N

  • Static load capacity (C₀): ≈ 45,000–47,000 N

  • Dynamic torsional moment capacity (Mt): ≈ 480–500 Nm

  • Dynamic longitudinal moment capacity (ML): ≈ 320–340 Nm

  • Static moment capacities (Mt₀ / ML₀): ≈ 600 Nm / 500 Nm

  • Maximum permissible speed: 5 m/s

  • Maximum permissible acceleration: 500 m/s²

  • Lubrication: Factory-filled grease, relubrication ports included

  • Operating temperature range: –10°C to +80°C

  • Mounting style: Flanged carriage, top-mount threaded holes

Typical Applications

The KWD-025-FNS-C0-N-1 is ideal for:

  • Large CNC machines, routers, machining centres and milling systems

  • Heavy-load industrial automation or assembly lines

  • Robotics and material-handling applications requiring reliable, smooth linear travel

  • Long-stroke or high-force positioning systems

  • Retrofits or replacements in existing Bosch Rexroth size-25 installations

  • Systems where low rolling friction is preferred over preload stiffness

Why Buy from Bearing King Ltd

When you choose Bearing King Ltd, you benefit from:

  • Genuine Bosch Rexroth OEM components

  • Competitive pricing and fast UK delivery

  • Expert technical support for rail matching, preload advice and installation guidance

  • Ready-to-install, pre-lubricated blocks that reduce downtime and increase service life