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

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