THK Co., Ltd. CFN 8R-A Cam Follower Stud Type

Description:

The THK CFN 8R-A Cam Follower is a stud-type cam follower bearing with integrated thrust ball bearings, designed to support radial loads while reducing friction and wear caused by incidental thrust loads. It provides smooth rolling motion, high rigidity, and long service life for cam mechanisms, guide rollers, conveyors, and automated machinery. Commonly installed in packaging equipment, industrial automation systems, machine tools, material handling equipment, and indexing mechanisms. Maintenance teams and machine builders use this cam follower for equipment repair, replacement, and new machine construction.

Applications:

The THK CFN 8R-A belongs to the THK CFN-R-A Series of cam followers containing thrust ball bearings. Unlike standard cam followers, the CFN series incorporates thrust-load ball bearings inside the stud, effectively preventing friction and wear on the stud shoulder when axial (thrust) loads occur due to installation misalignment or side loading. The "R" suffix denotes a spherical outer ring profile for improved alignment with mating surfaces, while the "A" suffix identifies the hexagon socket stud-head configuration for convenient installation.

Technical Specifications:

• Brand: THK
• Part Number: CFN 8R-A
• Product Type: Cam Follower Bearing
• Series: CFN-R-A (Containing Thrust Balls)
• Bearing Type: Stud-Type Cam Follower
• Stud Diameter: 8 mm
• Thread Size: M8 × 1.25
• Outer Diameter (D): 19 mm
• Outer Ring Width (C): 11 mm
• Inner Width (B): 12 mm
• Overall Length (B1): 32 mm
• Thread Length (G1): 10 mm
• Outer Ring Profile: Spherical (R)
• Stud Head: Hexagon Socket (A)
• Basic Dynamic Load Rating (C): 4.17 kN
• Basic Static Load Rating (C₀): 4.65 kN
• Lubrication: Grease lubricated (optional dedicated grease nipple available)
• Material: High-carbon bearing steel
• Features: Integrated thrust ball bearings, spherical outer ring for improved alignment, compact stud-type design, high rigidity, smooth rolling motion, and long service life.

Common Replacements:

• THK CF 8R-A Cam Follower
• THK CFH 8R-A Cam Follower
• THK CFN 10R-A Cam Follower