U-groove roller polyamide 6G 250×90 mm for tube 3" / 76.2 mm (R=38.1 mm), bore 40 mm with keyway

U-groove roller made of polyamide 6G with keyway and all-round U-groove tread for secure guidance on a tube with Ø 76.2 mm (3"). The bore has a hub groove according to DIN 6885 and can therefore be connected to a shaft in a rotationally secure way – for driven rollers and drive functions. Polyamide 6G is a high-strength, abrasion-resistant technical plastic with low weight, quiet in operation and gentle on the mating surface. Made to order.

Technical data

• Outside diameter: 250 mm
• Total width: 90 mm
• Tread width: 90 mm
• Bore diameter: 40 mm, fit H7
• Hub groove: 12 mm wide, 3.3 mm deep, fit JS9 – keyway according to DIN 6885
• Suitable for tube Ø: 3" / 76.2 mm (R=38.1 mm)
• Load capacity: 2000 kg
• Wheel and tread material: polyamide 6G (PA6G), natural colour
• Temperature range: -30 °C to +80 °C

Keyway instead of ball bearing

This version does not run on ball bearings, but sits rotationally secure on the shaft. The hub groove according to DIN 6885 accepts a key and thus transfers the torque between shaft and roller. Typical for driven conveyor lines, deflection pulleys on shafts and all applications where the roller should rotate with the shaft rather than run freely. If the roller is needed as a free-running version, the version with ball bearings is the right choice.

Properties of polyamide 6G

• High strength with low weight
• Very good abrasion resistance and wear resistance
• Low-noise operation compared with steel on steel
• Gentle on the steel mating surface (tube)
• Resistant to oils, greases and many chemicals
• Electrically insulating

Applications

U-groove rollers made of polyamide 6G with keyway are used where the roller is driven via a shaft or must sit rotationally secure: conveyor tracks in mechanical engineering, special machinery, overhead conveyors and noise-sensitive applications.

Made to order. For applications with direct food contact, please request a separate food-grade version.