CNC Machining – Material Options

A description of Material, Characteristics, Seal types and typical applications

Polyurethane: HPU 95A

Typical Applications:

• Low friction and wear
• High extrusion resistance
• Suitable for common hydraulic fluids
• Suitable for oil-water emulsions

Characteristics:

• Temperature: Min: -20°C (-4°F) Max: 115°C (240°F)
• Hardness: Shore A 95±2
• Colour: Red
• FDA Approved

 Seal Types: 

• Good Universal seal material
• Static and dynamic seals
• U-Cups, O-rings, wipers, backup rings
• Flange and rotary seals

Polyurethane: LT-PU 96A

Typical Applications:

• Low friction and wear
• High extrusion resistance
• Suitable for common hydraulic fluids
• Suitable for oil-water emulsions

Characteristics:

• Temperature: Min: -50°C (-58°F) Max: 110°C (230°F)
• Hardness: Shore A 96±2
• Colour: Blue
• Low Temperature

 Seal Types: 

• Good Universal seal material
• Static and dynamic seals
• U-Cups, O-rings, wipers, backup rings
• Flange and rotary seals

Polyurethane: SL-PU 96A

Typical Applications:

• Low friction, self-lubricating
• High extrusion resistance
• Suitable for non-lubricated applications
• Suitable for pure water applications
• Suitable for pneumatic applications

Characteristics:

• Temperature: Min: -20°C (-4°F) Max: 110°C (230°F)
• Hardness: Shore A 96±2
• Colour: Black
• Self-Lubricating

 Seal Types: 

• Good Universal seal material
• Static and dynamic seals
• U-Cups, O-rings, wipers, backup rings
• Flange and rotary seals

Nitrile Butadiene Rubber: NBR

Typical Applications:

• High abrasion resistance
• Common hydraulic fluid seal material
• Suitable for petroleum fluids, greases
• Suitable for water and mineral oil

Characteristics:

• Temperature: Min: -20°C (-4°F) Max: 115°C (240°F)
• Hardness: Shore A 85±5
• Colour: Black/White

 Seal Types: 

• Static and dynamic seals
• U-Cups, O-rings, wipers, backup rings
• Flange and rotary seals
• Rubber energizers (preload elements)

Fluorocarbon Elastomer (VITON): FPM

Typical Applications:

• High resistance to hydraulic fluids
• Excellent high temperature resistance
• Excellent chemical and ozone resistance
• Excellent weathering resistance

Characteristics:

• Temperature: Min: -20°C (-4°F) Max: 220°C (428°F)
• Hardness: Shore A 82±5
• Colour: Brown
• FDA Approved

 Seal Types: 

• Static and dynamic seals
• U-Cups, O-rings, wipers, backup rings
• Flange and rotary seals
• Rubber energizers (preload elements)

Fluorocarbon Elastomer (VITON): FPM Black

Typical Applications:

• High resistance to hydraulic fluids
• Excellent high temperature resistance
• Excellent chemical and ozone resistance
• Excellent weathering resistance

Characteristics:

• Temperature: Min: -20°C (-4°F) Max: 210°C (410°F)
• Hardness: Shore A 85±5
• Colour: Black
• FDA Approved

 Seal Types: 

• Static and dynamic seals
• U-Cups, O-rings, wipers, backup rings
• Flange and rotary seals
• Rubber energizers (preload elements)

Ethylene Propylene Rubber: EPDM

Typical Applications:

• Suitable for hot water, steam and fire-resistant fluids (with synthetic oils)
• Used in bases, acids and acholols
• Suitable for cleaning and washing applications
• NOT recommended for brake fluids or hydrocarbon base fluids

Characteristics:

• Temperature: Min: -45°C (-49°F) Max: 130°C (266°F)
• Hardness: Shore A 85±5
• Colour: Black

 Seal Types: 

• Static and dynamic seals
• U-Cups, O-rings, wipers, backup rings
• Flange and rotary seals
• Rubber energizers (preload elements)

Ethylene Propylene Rubber: EPDM White FDA

Typical Applications:

• Suitable for hot water, steam and fire-resistant fluids (with synthetic oils)
• Used in bases, acids and acholols
• Suitable for cleaning and washing applications
• NOT recommended for brake fluids or hydrocarbon base fluids

Characteristics:

• Temperature: Min: -45°C (-49°F) Max: 130°C (266°F)
• Hardness: Shore A 82±5
• Colour: White
• FDA Approved

 Seal Types: 

• Static and dynamic seals
• U-Cups, O-rings, wipers, backup rings
• Flange and rotary seals
• Rubber energizers (preload elements)

Silicone Rubber 

Typical Applications:

• Used in hot air applications
• Used in applications where chemical and food material are in contact with the sealing material
• Suitable for food applications
• NOT recommended for dynamic applications

Characteristics:

• Temperature: Min: -60°C (-76°F) Max: 200°C (392°F)
• Hardness: Shore A 85±5
• Colour: Clear/White
• FDA Approved

 Seal Types: 

• Static and dynamic seals
• U-Cups, O-rings, wipers, backup rings
• Flange and rotary seals
• Rubber energizers (preload elements)

Polytetrafluorethylene (Teflon®): PTFE 

Typical Applications:

• Universal material for many applications
• Excellent chemical properties
• Low coefficient of friction
• Wide temperature range

Characteristics:

• Temperature: Min: -200°C (-328°F) Max: 235°C (455°F)
• Hardness: Shore D 51-65
• Colour: White

 Seal Types: 

• Piston and rod seals
• O-Rings, back up rings
• Rotary seals
• Special seals

Typical Applications:

• High compression loads
• Excellent extrusion resistance
• Low coefficient of friction
• NOT suitable for dynamic water applications

Characteristics:

• Temperature: Min: -130°C (-200°F) Max: 302°C (575°F)
• Hardness: Shore D 57-67

• Bronze filled 40 %

 Seal Types: 

• Piston and rod seals
• O-Rings, back up rings
• Rotary seals
• Special seals

Typical Applications:

• Reduces creep
• Excellent wear resistance
• Low coefficient of friction
• Wide temperature range

Characteristics:

• Temperature: Min: -160°C (-250°F) Max: 302°C (575°F)
• Hardness: Shore D 51-65

• Carbon Graphite 

 Seal Types: 

• Piston and rod seals
• O-Rings, back up rings
• Rotary seals
• Special seals