M3 Spacers are compatible with the REV DUO System and accurate way to space gears, sprockets, wheels, and other parts on a M3 bolt.  

Washer for use with REV DUO M3 hardware.

5mm Hex Shafts are compatible with the REV DUO System. The hex shaft interface completely eliminates the need for expensive hubs or using potentially unreliable set screws. REV shafts are made out of strong, corrosion resistant stainless steel...

DUO Omni Wheels are compatible with the REV DUO System and have rollers mounted around the outside which passively rotate at 90 degrees to the powered direction of the wheel. DUO Omni Wheels can be used to make it easier to turn with skid steer...

DUO Traction Wheels are compatible with the REV DUO System and fit on a 5mm hex shaft. The hex shaft interface completely eliminates the need for expensive hubs or using potentially unreliable set screws. DUO Traction Wheels 60mm in...

DUO Round Belt Pulleys are compatible with the REV DUO System and are perfect for your conveyor and intake mechanisms when combined with Polyurethane Hollow Round Belting. Documentation DUO Build System Guide Product...

Through Bore Bearings are compatible with the REV DUO System and are used with 5mm Hex Shafts recommend for the DUO Extrusion System to provide a low friction rotating shaft support. These low profile bearings fit in any of the 3mm...

5mm Hex Spacers are compatible with the REV DUO System and accurate way to space gears, sprockets, wheels, and other parts along a 5mm hex shaft. Mix and match various spacer lengths to adjust spacing in increments as small as 1.5mm...

5mm Metal Hex Bore Gears are compatible with the REV DUO System and work with REV 5mm hex shafts in high-load applications. REV metal gears are NOT compatible with REV plastic gears. All REV metal gears are narrower than plastic...

5mm Plastic Hex Bore Gears are compatible with the REV DUO System and fit on a 5mm hex shaft. The hex shaft interface completely eliminates the need for expensive hubs or using potentially unreliable set screws. Gears 45 tooth...

UltraPlanetary Brackets are compatible with the REV DUO System. Each bracket includes holes on an 8mm grid that is compatible with many other building systems. The UltraPlanetary Outside Mounting Bracket (REV-41-1621) is used to...

DUO Plastic #25 Sprockets are compatible with the REV DUO System and fit on a 5mm hex shaft. The hex shaft interface completely eliminates the need for expensive hubs or using potentially unreliable set screws. Sprockets 15 tooth and...