Guide ring FK

Product overview
The Guide Ring FK prevents metallic contact between piston and bore and absorbs lateral forces that occur during cylinder operation. It is machined on turning centers with a diagonal cut and must be selected according to the operating conditions of the hydraulic or pneumatic system.

Materials & mechanical properties
Standard materials include filled PTFE, thermoplastics and fabric‑reinforced phenolic or polyester laminates. Compressive strength depends on the material and typically ranges from 15 to 100 N/mm². Use the following formula to estimate maximum load per guide ring: maximum load = lateral force / projected surface × 0.75.

Fields of application

• static guiding
• dynamic guiding
• single-acting cylinders
• double-acting cylinders
• linear motion
• rotating motion
• oscillating motion

Main use
Primary function is guiding in dynamic applications to avoid metal-to-metal contact and to absorb lateral loads.

Materials (summary)
Fabric-based laminate; Polymers; PTFE; PTFE with fillers; Thermoplastics; UHMW-PE.

Technical values (summary by material variant)

• PTFE: Pressure: - ; Temperature: approx. -200°C to +260°C (material dependent); Speed: up to 10 m/s
• Thermoplastic base: Pressure: - ; Temperature: approx. -200°C to +120°C (material dependent); Speed: up to 2 m/s
• Fabric-reinforced laminate: Pressure: - ; Temperature: approx. -40°C to +130°C (material dependent); Speed: up to 1 m/s

Notes
Maximum temperature, speed and pressure values are not simultaneously applicable and vary depending on material and media. Confirm selection with supplier data for specific applications.

Technical specifications

• Model: Guide Ring FK
• Function: Prevents metallic contact between piston and bore; absorbs lateral forces
• Manufacture: Machined on turning machines with a diagonal cut
• Typical materials: Fabric-based laminate; Polymers; PTFE; PTFE with filling; Thermoplastics; UHMW-PE
• Compressive strength (material dependent): approx. 15 to 100 N/mm²
• Load calculation: maximum load per guide ring = lateral force / projected surface × 0.75
• Temperature ranges (material dependent): PTFE up to +260°C; Thermoplastics up to +120°C; Fabric laminate up to +130°C
• Speed ranges (material dependent): up to 10 m/s (PTFE), up to 2 m/s (thermoplastics), up to 1 m/s (fabric laminate)
• Pressure: depends on material and application
• Main applications: static and dynamic guiding, single- and double-acting cylinders, linear, rotating and oscillating movements