KOK Boots & Bellows
Boots & Bellows
KOK manufactures rubber boots and bellows for drivetrain, steering, suspension, transmission, and mechanical protection applications, supplying both original equipment (OE) and aftermarket (AM) customers.
Boots and bellows are critical protective components designed to exclude contaminants, retain lubrication where required, and accommodate movement between mating parts under dynamic operating conditions.
KOK has supplied boots and bellows for automotive and powersports applications for many years, supporting series production, service replacement, and platform-specific requirements.
Manufacturing & Supply Scope
KOK boots and bellows are manufactured to customer-defined specifications, supporting:
- OE production programs
- High-volume aftermarket supply
- Platform-specific and application-specific designs
Production focuses on dimensional consistency, material stability, and long-term durability under real-world operating conditions.
Application Coverage
KOK manufactures boots and bellows for a wide range of applications, including:
- Automotive boots and bellows
- CV boots and CV boot kits
- Power steering bellows
- Motorcycle and scooter boots
- ATV and powersports boots
- Marine bellows
- Heavy equipment boots and bellows
Boots & Bellows Materials
Material Systems
KOK manufactures boots and bellows using elastomer systems specified by the customer, selected to meet defined environmental, mechanical, and durability requirements.
Depending on application and specification, materials may include:
- Neoprene (CR)
- Silicone (VMQ)
- FKM
- Thermoplastic elastomers (TPE)
- Thermoplastic vulcanisates (TPV)
Material systems are selected to address requirements such as temperature exposure, flexibility during articulation, and resistance to oils, grease, and environmental factors.
Quality & Testing
Boots and bellows are functionally critical components, and consistent quality is essential for reliable field performance.
KOK operates in-house testing capabilities to support product validation and ongoing quality control in accordance with customer specifications.
Testing may include, depending on program requirements:
- Low-temperature exposure testing
- Dynamic and vibration-related testing
- Accelerated aging and material stability tests
Testing methods and acceptance criteria are defined by customer requirements and applicable standards.
