7/29/2019 wheel guide

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The hardness of a wheel affects ease of rolling,traction, durability, shock absorption, and noise.Harder wheels are easier to roll on smoothsurfaces, but are noisier, and provide less trac-tion. Softer wheels are easier to push on roughsurfaces, quieter, and provide better traction, buthave a lower l oad capacity.

Wheel Tread Hardness/DurometerShore A Shore D M aterial

30 6 Gum Eraser40 8 Pink Eraser50 12 Rubber Stamp60 16 Pencil Eraser70 22 Auto Tire Tread80 29 Rubber Shoe Sole90 39 Hydraulic O-Rings

100 58 Golf Ball 74 Hard Hat 78 Nyl on Plast ic 86 Bon e

90 Glass or Form ica

All Polyolefin: One-piece injection-molded poly-olefin plastic resists most chemicals and oils,while providing excellent impact resistance inheavy-duty applications.

All Rubber: Use these quiet-rolling wheels incorrosive and damp environments where metal

materials might be susceptible to breakdown.Antimicrobial: Wheel compound is speciallyformulated to suppress the grow th of bacteria.

Antistatic Rubber: Quiet-rolling wheels are idealfor environments with sensitive electronic equip-ment and/or flammable materials.

Cast Iron: High-capacity wheels offer goodshock and abrasion resistance and long wear inrugged industrial environments.

Conductive Rubber: Use on sensitive electronicequipment that must be grounded to preventstatic electricity from developing.

Ductile Iron: Machined wheels have superiorresistance to breakage, cracking, and chippingto outlast cast and forged wheels.

Forged Steel: Easy-rolling wheels are designedto handle very high load capacities and with-stand high temperatures.

High-Temp. Glass-Filled Nylon: Solidnylon/glass mixture withstands intermit tentextreme temperatures. Will not chip, absorb

water, or break down in caustic environments.High-Temp. Phenolic: Phenolic resin is impreg-nated and reinforced with macerated fabric andspecial additives for long wear, high load capaci-ties, and high temperature resistance.

High-Impact Polymer: Usually a nylon wit himproved impact resistance additives. Formedium-duty applications that require goodshock absorption.

Nylon: Nonmarking wheels handle high loadcapacities and resist oils, fats, alkalis, soaps,

and detergents.Phenolic: Phenolic resin is impregnated andreinforced with macerated fabric for longer wearand higher load capacities.

Pneumatic: Ideal for transporting delicate loadsand rolling over rough surfaces.

Polyolefin: Lightweight, nonmarking plasticresists most chemicals and oils, while providingexcellent impact resistance in heavy-duty appli-cations.

Polypropylene: Hard, rigid surface resistsscratches and provides high impact resistance.

Polyurethane: Offers superior chemical resist-ance and long life with all wheel types.

Polyurethane on Aluminum: Nonmarking floorprotection molded and mechanically locked to acorrosion-resistant aluminum core.

Polyurethane on Polyolefin: Long-lastingpolyurethane tread is chemically bonded to alightweight, im pact-resistant polyolefin core.

Polyurethane on Polypropylene: Easy-rolling,

industrial-strength polyurethane protects floors,cushions loads, and offers superior chemicalresistance.

Rubber on Aluminum: Rubber is permanentlybonded to an aluminum hub for very good floor

protection and corrosion resistance in medium-capacity applications.

Rubber on Polyolefin: Rubber is molded andmechanically locked to a chemical- oil-, andimpact-resistant polyolefin hub for very goodfloor protection in heavy-duty applications.

Rubber Tread: Soft rubber is bonded to a hardrubber core to provide very good floor protec-tion and quiet operation.

Semi Steel: Cast iron wheel is enriched withsteel to accommodate heavier loads.

Soft Rubber: Soft, quiet-rolling natural rubber ismolded with all-natural hard rubber core toprovide excellent floor protection. Use on hardfloors.

Solid Elastomer: Steam-cleanable wheelsprovide excellent ease of movement formedium-to- heavy loads in harsh environments.Not affected by blood, brine, salt, grease, oils,and many other chemicals.

Thermoplastic Olefin: Chemical- and water-resistant thermoplastic elastomer is bonded to atough polyolefin core. Absorbs shock andprotects floors while providing easy rollability.

TPR: Chemical- and water-resistant thermoplas-tic elastomer absorbs shock and protects floorswhile providing easy rollability.

TPR on Polyolefin: Chemical- and water-resist-ant thermoplastic elastomer is bonded to atough polyolefin core.

Stainless Types 303 and 304 Steel: Can bewashed down and sanitized to meet require-ments of corrosive and sanitary environments.Will not tarnish. High capacity.

Wheel Material Guide

Durometer is a measure of a materials resist-ance to permanent indentation, and is typicallyused to measure the hardness of rubber, elas-tomers, polym ers, and other plastic m aterials.The 2 most com mon dur ometer scales for wheelhardness are the A and D scales of the Shoretesting method. The table shows a comparisonof the Shore A and Shore D scales, with a refer-ence to some com mon m aterials.