Document gDNywzyXbGb3z24KLgjYDDOy9

PFAS regulation and its potential impact on the machine tool industry Sealing types and materials in machine tools Applications and Consequences Power cable and control cable Public consultation: Fluoropolymers such as PTFE and FKM generally have long chain "large molecules" organised recycling at the end of life, closed loop, abrasion does not enter the environment ... For prohibition: Limitation Lifetime, tightness, friction, energy consumption, sustainability, safety Spare parts in old constructions/ machines (Special spare parts require special shapes) Boundary conditions for alternatives: 10 C to +70 C linear speed up to 3 m/ sec PUR outer sheath, low adhesion, extremely abrasion resistant, halogen-free, resistant to UV-, oil, hydrolysis and microbial attack, Resistant to cleaning and disinfecting agents 2 Changeover to other elastomers possible, in which case the chemical resistance, resistant to UV, low adhesion, the linear speed must be taken into account. The different components in the environment like additives in the cooling lubricants and other components in the air are usually critical, as they can cause changes in the cable jacket. These changes are sometimes critical for the application. In-depth investigations are necessary for this 9/ 6/ 2023 Pneumatic applications O-ring pre-stressed PTFE seals Public consultation: Fluoropolymers such as PTFE and FKM generally have long chain "large molecules" organised recycling at the end of life, closed loop, abrasion does not enter the environment ... For prohibition: Limitation Lifetime, tightness, friction, energy consumption, sustainability, safety Spare parts in old constructions/ machines (Special spare parts require special shapes) Boundary conditions for alternatives: -10 C to +50 C up to 1m/ s Dry or oiled air Influence of MW F and of CGLP Lubricating oil, fluid grease xxx Target same lifetime 3 Possible alternative material combinations UHMW -PE / NBR Temperature limit <80 C Polyurethane / NBR Temperature limit <100 C Note increased friction values Pure elastomer seals Temperature limitation 9/ 6/ 2023 Fr high pressure hydraulic application Backing rings based on PTFE Public consultation: Fluoropolymers such as PTFE and FKM generally have long chain "large molecules" organised recycling at the end of life, closed loop, abrasion does not enter the environment ... For prohibition: Limitation Lifetime, tightness, friction, energy consumption, sustainability, safety Spare parts in old constructions/ machines (Special spare parts require special shapes) Boundary conditions for alternatives: +10 C to +70 C static High pressure up to 240 bar Influence of HLP46, MW F and of CGLP lubricating oil, fluid grease xxx Target same lifetime 4 Image source: VDM A teaching material Possible alternatives: UHMW -PE (< 80 C) , Elastomers, TPU (<100 C) generally thermoplastics more difficult assembly and observe assembly limits Disadvantages: Assembly Universal resistance to operating materials is lost 9/ 6/ 2023 PTFE-based guide elements Public consultation: Fluoropolymers such as PTFE and FKM generally have long chain "large molecules" organised recycling at the end of life, closed loop, abrasion does not enter the environment ... For prohibition: Limitation Lifetime, tightness, friction, energy consumption, sustainability, safety Spare parts in old constructions/ machines (Special spare parts require special shapes) Boundary conditions for alternatives: +10 C to +70 C 1 m/ s No pressure resistance, surrounded by pressure on all sides depending on the application, Influence of HLP46, MW F and of CGLP lubricating oil, fluid grease xxx Target same lifetime 5 Image source: VDM A teaching material Possible alternatives: UHMW -PE (< 80 C) , Thermoset (fabric composites) Thermoplastic materials such as POM, PA ... Disadvantages: Universal resistance to operating materials is lost Increased friction values are to be expected (higher energy input necessary) 9/ 6/ 2023 O-rings on FKM and FFKM basis Public consultation: Fluoropolymers such as PTFE and FKM generally have long chain "large molecules" organised recycling at the end of life, closed loop, abrasion does not enter the environment ... For prohibition: Limitation Lifetime, tightness, friction, energy consumption, sustainability, safety Spare parts in old constructions/ machines (Special spare parts require special shapes) Boundary conditions for alternatives: 0 C to +70 C static High pressure up to 240 bar Influence of HLP46, MW F and of CGLP lubricating oil, fluid grease xxx Target same lifetime 6 Image source: VDM A teaching material Possible alternative: NBR, HNBR The different additives in the cooling lubricants are usually critical, as they can sometimes cause critical changes in NBR and HNBR for the application. In-depth studies are necessary for this Max. application temperatures depending on the media to be sealed NBR approx. 100 C HNBR approx. 140 C 9/ 6/ 2023 X-rings on FKM and FFKM basis Public consultation: Fluoropolymers such as PTFE and FKM generally have long chain "large molecules" organised recycling at the end of life, closed loop, abrasion does not enter the environment ... For prohibition: Limitation Lifetime, tightness, friction, energy consumption, sustainability, Spare parts in old constructions/ machines (Special spare parts require special shapes) Boundary conditions for alternatives: 0 C to +70 C Static +Quasistatic High pressure up to 240 bar Influence of MW F and of flowing grease xxx Target same lifetime 7 Image source: VDM A teaching material Possible alternative: NBR, HNBR The different additives in the cooling lubricants are usually critical, as they can sometimes cause critical changes in NBR and HNBR for the application. In-depth studies are necessary for this Maximum application temperatures NBR approx. 100 C depending on the media to be sealed HNBR approx. 140 C 9/ 6/ 2023 O-ring preloaded translational hydraulic seals Public consultation: Fluoropolymers such as PTFE and FKM generally have long chain "large molecules" organised recycling at the end of life, closed loop, abrasion does not enter the environment ... For prohibition: Limitation Lifetime, tightness, friction, energy consumption, sustainability, safety Spare parts in old constructions/ machines (Special spare parts require special shapes) Boundary conditions for alternatives: 10 C to +70 C 1 m/ s High pressure up to 240 bar Influence of HLP46, MW F and of CGLP lubricating oil, fluid grease xxx Target same lifetime 8 Affected material combinations PTFE filled / NBR PTFE filled / FKM UHMW -PE (Z80) / FKM Polyurethane / FKM Possible alternative material combinations UHMW -PE / NBR Temperature limitation up to 80 C and pressure limitation up to 350 bar Polyurethane / NBR Temperature limitation up to 100 C Note increased friction values Thermoplastics such as PEEK or similar / NBR Temperature limitation up to 100 C Friction and mounting possibility must be checked The different additives in the cooling lubricants are usually critical, as they can cause changes in NBR and HNBR that are sometimes critical for the application. In-depth investigations are necessary for this 9/ 6/ 2023 O-ring preloaded rotary seals Public consultation: Fluoropolymers such as PTFE and FKM generally have long chain "large molecules" organised recycling at the end of life, closed loop, abrasion does not enter the environment ... For prohibition: Limitation Lifetime, tightness, friction, energy consumption, sustainability, safety Spare parts in old constructions/ machines (Special spare parts require special shapes) Boundary conditions for alternatives: 10 C to +70 C 1 m/ s High pressure up to 240 bar Influence of HLP46, MW F and of CGLP lubricating oil, fluid grease xxx Target same lifetime 9 Affected material combinations PTFE filled / NBR PTFE filled / FKM UHMW-PE / FKM Possible alternative material combinations UHMW -PE / NBR Temperature limitation up to 80 C and pressure limitation up to 300 bar Polyurethane / NBR Temperature limitation up to 100 C Note increased friction values Thermoplastics such as PEEK or similar / NBR Temperature limitation up to 100 C Friction and mounting possibility must be checked The different additives in the cooling lubricants are usually critical, as they can cause changes in NBR and HNBR that are sometimes critical for the application. In-depth investigations are necessary for this 9/ 6/ 2023 Radial shaft seal Public consultation: Fluoropolymers such as PTFE and FKM generally have long chain "large molecules" organised recycling at the end of life, closed loop, abrasion does not enter the environment ... For prohibition: Limitation Lifetime, tightness, friction, energy consumption, sustainability, safety Spare parts in old constructions/ machines (Special spare parts require special shapes) Boundary conditions for alternatives: 10 C to +70 C Up to 30000 RPM Almost pressureless Influence of HLP46, MW F and of CGLP lubricating oil, fluid grease xxx Target same lifetime 10 Changeover to other elastomers possible, in which case the chemical resistance and also the circumferential speed must be taken into account. At high circumferential speeds, the frictional heat rises sharply, which makes the use of NBR and possibly also HNBR impossible. The different additives in the cooling lubricants are usually critical, as they can cause changes in NBR and HNBR that are sometimes critical for the application. In-depth investigations are necessary for this 9/ 6/ 2023 Lip seal ring Public consultation: Fluoropolymers such as PTFE and FKM generally have long chain "large molecules" organised recycling at the end of life, closed loop, abrasion does not enter the environment ... For prohibition: Limitation Lifetime, tightness, friction, energy consumption, sustainability, safety Spare parts in old constructions/ machines (Special spare parts require special shapes) Boundary conditions for alternatives: 10 C to +70 C Circumferential speed up to 2 m/ sec Almost pressureless (1 bar overpressure) Influence of MW F, lubricating oil and fluid grease xxx Target same lifetime 11 Changeover to other elastomers possible, in which case the chemical resistance and also the circumferential speed must be taken into account. At high circumferential speeds, the frictional heat rises sharply, which makes the use of NBR and possibly also HNBR impossible. The different additives in the cooling lubricants are usually critical, as they can cause changes in NBR and HNBR that are sometimes critical for the application. In-depth investigations are necessary for this 9/ 6/ 2023 O-ring preloaded PTFE wiper Public consultation: Fluoropolymers such as PTFE and FKM generally have long chain "large molecules" organised recycling at the end of life, closed loop, abrasion does not enter the environment ... For prohibition: Limitation Lifetime, tightness, friction, energy consumption, sustainability, safety Spare parts in old constructions/ machines (Special spare parts require special shapes) Boundary conditions for alternatives: -10 C to +50 C up to 1m/ s pressureless Environmental influences Influence of MW F and of CGLP Lubricating oil, fluid grease xxx Target same lifetime 12 Affected material combinations PTFE filled / NBR PTFE filled / FKM Possible alternative material combinations UHMW -PE / NBR Temperature limitation up to 80 C and Polyurethane / NBR Temperature limit up to 100 C, observe increased friction values Thermoplastics such as PEEK or similar / NBR Temperature limitation up to 100 C Friction and mounting possibility must be checked The different additives in the cooling lubricants are usually critical, as they can cause changes in NBR and HNBR that are sometimes critical for the application. In-depth investigations are necessary for this 9/ 6/ 2023 O-ring preloaded hydraulic rod seals Public consultation: Fluoropolymers such as PTFE and FKM generally have long chain "large molecules" organised recycling at the end of life, closed loop, abrasion does not enter the environment ... For prohibition: Limitation Lifetime, tightness, friction, energy consumption, sustainability, safety Spare parts in old constructions/ machines (Special spare parts require special shapes) Boundary conditions for alternatives: 10 C to +70 C 1 m/ s High pressure up to 240 bar Influence of HLP46, MW F and of CGLP lubricating oil, fluid grease xxx Target same lifetime 13 Affected material combinations PTFE filled / NBR PTFE filled / FKM UHMW -PE (Z80) / FKM Polyurethane / FKM Possible alternative material combinations UHMW -PE / NBR Temperature limitation up to 80 C and pressure limitation up to 350 bar Polyurethane / NBR Temperature limitation up to 100 C Note increased friction values Thermoplastics such as PEEK or similar / NBR Temperature limitation up to 100 C Friction and mounting possibility must be checked The different additives in the cooling lubricants are usually critical, as they can cause changes in NBR and HNBR that are sometimes critical for the application. In-depth investigations are necessary for this 9/ 6/ 2023 Special rotation seal Public consultation: Fluoropolymers such as PTFE and FKM generally have long chain "large molecules" organised recycling at the end of life, closed loop, abrasion does not enter the environment ... For prohibition: Limitation Lifetime, tightness, friction, energy consumption, sustainability, safety Spare parts in old constructions/ machines (Special spare parts require special shapes) Boundary conditions for alternatives: 10 C to +70 C Circumferential speed up to 2 m/ sec Almost pressureless (1bar overpressure) Influence of MW F, lubricating oil and fluid grease xxx Target same lifetime 14 Changeover to other elastomers possible, in which case the chemical resistance and also the circumferential speed must be taken into account. At high circumferential speeds, the frictional heat rises sharply, which makes the use of NBR and possibly also HNBR impossible. The different additives in the cooling lubricants are usually critical, as they can cause changes in NBR and HNBR that are sometimes critical for the application. In-depth investigations are necessary for this 9/ 6/ 2023 Special rotation and linear guideways Public consultation: Fluoropolymers such as PTFE and FKM generally have long chain "large molecules" organised recycling at the end of life, closed loop, abrasion does not enter the environment ... For prohibition: Limitation Lifetime, tightness, friction, energy consumption, sustainability, safety Spare parts in old constructions/ machines (Special spare parts require special shapes) Boundary conditions for alternatives: 10 C to +80 C Sliding speed up to 10 m/ min High surface load up to 50 N/ mm Excellent Anti-stick-slip and damping behaviour Influence of MW F, lubricating oil and fluid grease xxx Target same lifetime and physical characteristics 15 Changeover to other guideways because of the accuracy, load and damping characteristics impossible. Efficiency and economy decreases. W ith lower efficiency and economy roller linear guide could be used. In-depth investigations are necessary for this 9/ 6/ 2023 Contact Liebherr Verzahntechnik GmbH Gear Technology and Automation Systems Phone +49 831786-0 E-Mail Iiebherr.com Internet www.Liebherr.com 9/ 6/ 2023 1IEBHERR