O-ring 130 x 5.5 mm NBR

NBR O-ring 130x5.5 70 ShA - high-performance rubber seal

This O-ring 130 x 5.5 NBR 70 ShA is a rubber sealing component made from nitrile (NBR) of 70 Shore A hardness. It has an inner diameter of 130 mm and a cross-section (thickness) of 5.5 mm.

Key Features

• Inner diameter (ID): 130 mm

• Cross-section (CS): 5.5 mm

• Material: NBR (nitrile rubber)

• Hardness: 70 Shore A

• Application type: static and mild dynamic sealing

• Resistance: oils, fuels, lubricants

• Typical temperature range: -30 °C to +100 °C (depending on specifics)

• Use cases: pumps, valves, hydraulic cylinders, engines, industrial machines

Benefits

• Versatile use in industrial sealing systems

• Strong sealing performance with proper fit

• Good chemical resistance (in typical oil environments)

• Cost-effective

• Easy to replace

Mounting & Maintenance Tips

• Ensure mating surfaces and groove are clean and undamaged

• Install carefully avoiding nicks or cuts at edges

• Design groove tolerances to avoid over-stressing the O-ring

• In high-temperature or chemical environments consider alternative materials

• Periodic inspection for wear, cracks or deformations

FAQ

Q: What does 130 x 5.5 NBR 70 ShA mean?
A: 130 mm is the inner diameter, 5.5 mm is the cross-section thickness, and NBR 70 ShA is the material (nitrile rubber) with 70 Shore A hardness.

Q: What operating conditions can it handle?
A: Typically from -30 °C up to +100 °C, under standard oil/grease environments.

Q: Is it resistant to oils and fuels?
A: Yes — NBR is well-suited for oils, fuels, and lubricants; but in very aggressive chemicals, one should consider specialized elastomers.

Q: Can it be used for dynamic sealing?
A: Yes — for static applications and moderate dynamic sealing if design and groove are properly matched.

Q: When should I choose a different material?
A: For extreme temperatures, ozone exposure, or aggressive chemicals — consider FKM, EPDM, or silicone instead.