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FKU115 Heavy‑Duty V‑Groove Guide Roller Bearing (No Bolt Shaft)The FKU115 is a high‑performance heavy‑load linear guide roller bearing designed as a direct replacement for NADELLA FKU115. Featuring a double row tapered roller structure and no bolt shaft design, it delivers exceptional radial and axial load capacity for heavy‑duty linear motion systems.

Brand: CNXM / High‑quality Chinese replacement
Type: V‑groove guide roller bearing (no bolt shaft)

Core Advantages:

No Bolt Shaft Design: Installed directly on a dedicated shaft, offering flexible mounting and compatibility with custom shafts.

Superior Load Capacity: Double row tapered roller design withstands heavy radial, axial, and impact loads in high‑speed linear motion systems.

Precision Alignment: Convex V‑groove outer ring reduces edge stress and compensates for minor track misalignment.

Durability: Blackened outer ring and GCr15 steel ensure excellent corrosion resistance and long service life in harsh industrial environments.

Interchangeability: Fully interchangeable with NADELLA FKU115 and compatible with RKU115 series (eccentric vs. concentric bolt).

Typical ApplicationsIdeal for heavy‑duty linear motion systems including:
Gantry machining centers, heavy machine tools, and rolling mills
Automated production lines, heavy conveyors, and robotic walking mechanisms
Metallurgical, mining, port machinery, and precision industrial equipment
High‑precision linear guide systems requiring heavy load support
This FKU115 bearing combines NADELLA‑equivalent performance with cost‑effective replacement options, making it the preferred choice for demanding heavy‑load linear guidance applications.

Parameters Values ​​| Description

Outer Diameter De:115mm | Maximum outer ring diameter

Inner Diameter d: 35mm | Inner ring bore diameter (compatible shaft diameter)

Total Width T: 33.5mm | Overall bearing thickness

Inner Ring Width m: 36mm | Inner ring axial width

Outer Ring Width B: 72mm | Outer ring axial width

Mounting Surface Width A: 60mm / 63mm | 60mm (standard) / 63mm (stainless steel NX version)

Flange Width F: 52mm | Inner ring flange width

Pin Hole Diameter d2: 4mm | Anti-rotation pin hole

V-groove Curvature R 400 | Outer ring V-groove convex surface radius

The FKU series was originally developed by Nadella (an Italian expert in heavy-duty linear motion and roller bearings) as a line of heavy-duty tapered roller track bearings. These bearings are designed for high load capacity, high precision, and long service life, and are widely used in metallurgy, logistics, heavy machinery, and other industrial sectors. Changzhou XuanMao Bearings currently produces alternative products. CNXM Brand.

Core Positioning and Structure

- Brand: CNXM, a professional manufacturer of heavy-duty linear motion bearings and roller bearings.

- Type: Tapered roller raceway bearing with a convex outer ring raceway (R=400mm), suitable for heavy-duty, impact, and eccentric load conditions.

Structural Features:

- Double row or full complement roller bearings, providing high radial and axial load capacity and capable of withstanding overturning moments.

- Inner ring with cylindrical bore or internal thread, compatible with bolted shafts (e.g., RKUR, RKU series).

Product Models:

FKU55   FKU65   FKU75   FKU95   FKU115

RKU55   RKU65   RKU75  RKU95   RKU115

RKUR55   RKUR65   RKUR75  RKUR95   RKUR115