4" Dualie Plastic Omni Wheel Specifications: Diameter: 4 inches Width Across Middle: 1.64 inches from outside of bearing surfaces 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: 0.95 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) Two - R8 1/2" id Bearings Two - 1/2" id flanged, shielded ball bearing (FR8ZZ) Usage: 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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