Chain Sprockets and Gears

At TSE, we can fabricate all types of custom sprocket, gear, or conveyor components to meet your application needs. Which do you need? The first question we ask is which do you need? Sprockets and gears are grooved wheels that operate within a machine, but their functions are different. Gears are generally toothed wheels that connect with the teeth on another gear to transmit movement. Sprockets use their teeth to “bite” into or interact with one or more flexible components, like a chain or conveyor belt.

We can make several types of engineered plastic sprockets, including wire belt, roller chain, waste water and mill. Our expertise also cover keyways, setscrews, and A, B and C hubs.

From just a few to a few thousand, our custom-made machined plastic sprockets and gears are lightweight and won’t rust or corrode. They also lessen noise pollution and can reduce the need for lubricants, and in some cases eliminate them.

Material Choices

Although Sprockets and Gears can be machined out of a number of materials like Nylon, Teflon, and Acetal, the most popular is Duro-Glide® UHMW-PE.

Choose the material you are interested in for a brief overview of its properties. For a complete listing of available products and full physical properties, please see the Physical Properties of Plastics.

Duro-Glide® Plastics Physical Performance Properties

Performance PropertyASTM TestUnitsUHMW-PE
Tensile StrengthD63873°F, psi4,000-5,5000
Flexural Modulus of Elasticity (73°F, psi)D79073°F, psi75,000
Tensile ImpactD182273°F,ft lb/in²1,000
Coefficient of linear thermal expansionD696in/in/°F7.2×10.5
Deflection temperature @ 264 psiD648°F
Deflection temperature @ 66 psiD648°F158 – 174
Maximum continuous service temp in air°F160/180
Water absorption immersion (24 hrs)D570%<.01

Natural Extruded Nylon Physical Performance Properties

Performance PropertyASTM TestUnitsNylon
Tensile StrengthD63873°F, psi9,000-12,000
Flexural Modulus of ElasticityD79073°F, psi175,000-410,000
Tensile ImpactD182273°F, ft lb/in²90-180
Coefficient of linear thermal expansionD696in/in/°F5.5×10.5
Deflection temperature @ 264 psiD648°F200-450
Deflection temperature @ 66 psiD648°F400-460
Maximum continuous service temp in air°F180-200
Water absorption immersion (24 hrs)D570%0.6-1.5

Molded Teflon® Physical Performance Properties

Performance PropertyASTM TestUnitsTeflon®
Tensile StrengthD63873°F, psi1,500-5,000
Flexural Modulus of ElasticityD79073°F, psi90,000-110,000
Tensile ImpactD182273°F, ft lb/in²30-200
Coefficient of linear thermal expansionD696in/in/°F5.5-7.5×10.5
Deflection temperature @ 264 psiD648°F100-140
Deflection temperature @ 66 psiD648°F
Maximum continuous service temp in air°F500
Water absorption immersion (24 hrs)D570%0.00-0.05

Extruded Acetal Physical Performance Properties

Performance PropertyASTM TestUnitsAcetal
Tensile StrengthD63873°F, psi8,800-12,000
Flexural Modulus of ElasticityD79073°F, psi375,000-550,000
Tensile ImpactD182273°F, ft lb/in²40-90
Coefficient of linear thermal expansionD696in/in/°F4.2-4.7×10.5
Deflection temperature @ 264 psiD648°F230-255
Deflection temperature @ 66 psiD648°F316-338
Maximum continuous service temp in air°F180
Water absorption immersion (24 hrs)D570%0.12-0.25

Considerations

Below are some aspects to consider when you are determining your sprocket or gear. You can also download our Sprocket and Gear Buyers Guide to aid in your decision.

Chain TypeSet ScrewsNumber of Teeth
Bore Type & SizeSplit or One-PieceKey Way
Hub TypeNominal WidthOutside Diameter
Hub DiameterPitch and Pitch DiameterLength Through Bore (LTB)

 

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