V-Seals

KOK manufactures V-seals for rotary shaft sealing applications requiring flexible axial sealing, contamination exclusion, and tolerance to shaft misalignment.

V-seals are all-rubber axial lip seals that rotate with the shaft and seal against a counterface, providing effective protection against dust, dirt, moisture, and light oil splash. Their simple geometry allows reliable sealing performance in applications where conventional radial oil seals may not be suitable.

Contents

• Functional Characteristics
• Design Advantages
• Size Range
• V-Seal Profiles
• Application Scope

Functional Characteristics

KOK V-seals are designed to provide:

• Low-friction axial sealing
• Protection against external contamination
• Tolerance to shaft eccentricity and minor misalignment
• Reliable performance under dynamic rotation

Because the sealing lip rotates with the shaft, wear occurs primarily on the counterface rather than within the seal body, contributing to stable long-term operation.

Design Advantages

V-seals offer practical design and installation benefits:

• Flexible lip reduces risk of damage during assembly over splines or keyways
• Accommodates wider shaft tolerance ranges compared to rigid radial seals
• Simplified housing requirements in many applications
• Can serve as both primary light-duty seal or secondary excluder

The overlapping size structure allows one V-seal size to accommodate multiple shaft diameters, reducing inventory complexity.

Size Range

Shaft Diameter Range:

3 mm – 2,000 mm

KOK produces 85 standard sizes covering a broad range of shaft dimensions for industrial, automotive, and heavy-duty applications.

V-Seal Profiles

KOK supplies standard V-seal types including:

• VA
• VS
• VL
• VE

Each profile is selected according to shaft size, space constraints, and operating environment.

Application Scope

KOK V-seals are specified for:

• Automotive rotating systems
• Motorcycle driveline and wheel assemblies
• Industrial machinery
• Heavy-duty equipment
• General rotary shaft contamination protection