4" Dualie Plastic Omni Wheel Specifications: Diameter: 4 inches Width Across Middle: 1.53 inches Bore: 1.125 inch diameter x 1/3" deep with a 0.95" diameter thru hole Bolt Pattern: 6 holes on a 1.875 inch bolt circle Body Material: Black polycarbonate Load Capacity: 120 pounds (rollers don't spin past this point) Weight: 0.81 pounds Number of Rollers: 18 Roller Material, Outside: Black SBR Rubber Roller Durometer: 80A Roller Bearing Material: Brass Roller Axle: Steel dowel pin Roller Diameter: 3/4 inch Repairable by removing interior M5 screws Included Hardware: Four - 4" Plastic Omni Wheel Webs Eighteen - Black SBR Rollers Eighteen - 1x1/8 Steel Dowel Pins Thirty-six - Omni-roller Sleeves Six - #10-32 x 1.375" SHCS Six - Individual M5 Nylock Nuts One - 250 Sprocket Spacer (sandwiches between the two wheels) Usage: With Axle and Hub: If you wish to drive this wheel with an Axle and Hub, you can pick your hub by fitting any of the AndyMark hubs (except the Small DD Globe Hub) to this wheel. Hubs are NOT included in the price of the wheel. If this is your choice, then no bearing is needed. To install a hub onto this wheel, longer screws will be needed to replace those on this wheel (3 or 6 of them) With Sprocket: If you wish to drive this wheel with a sprocket, then the sprocket needs to be attached to the side of the wheel, and one ball bearing needs to be pressed into the wheel (on one side). We recommend 4 non-flanged bearings (2 on the outside and 2 on the inside) with the same inner diameter. With Bearings: To press bearings into this wheel (for a free spinning wheel or for use with a sprocket), two ball bearings need to be pressed into the wheel (one on each side). The ball bearing must have a 1.125" od. We recommend 4 non-flanged bearings (2 on the outside and 2 on the inside) with the same inner diameter.
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