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Robot Wheel Adapters/Hubs

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Omni Wheel Motor Adapter 4mm
US$4.50
4mm Motor adapter for Omni Wheel 58mm
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Omni Wheel Motor Adapter 6mm
US$4.50
6mm Motor adapter for Omni Wheel 58mm
 
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Aluminum Mounting Hub for 1/4" Shaft
US$9.79
The bore diameter is designed for 1/4" shafts or 6.35mm shafts. To keep the shaft locked into place, this product comes with an 3/32" Hex set screw and four 4-40 philips head screws for fastening to the frame.
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FIT0523 Copper Coupling (4mm)
US$4.49
This is a high-quality copper coupling for connecting wheels and motors to facilitate the user to build a robot or small mobile platform motion system. The coupling is fully CNC machined with solid workmanship and high precision. The inner bore is 4mm in diameter and is suitable for DFRobot's rubber wheels as well as a variety of DC gearmotors. The copper material also makes it extremely durable and reliable.
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2675-POLOLU Aluminum Scooter Wheel Adapter for 1/4″ Shaft
US$6.93
This two-part aluminum assembly mounts directly to 1/4 inch diameter motor output shafts like those on our NEMA 23 stepper motors and allows you to drive most scooter, skateboard, inline skate, and other common wheels that are compatible with popular 608 ball bearings.
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1079-POLOLU Universal Aluminum Mounting Hub for 3mm Shaft, #2-56 Holes (2-Pack)
US$9.51
These universal aluminum mounting hubs allow you to mount custom wheels and mechanisms to 3 mm diameter motor shafts. The set includes two hubs, two #4-40 set screws for securing the hubs to motor shafts, and one 0.05″ Allen wrench for use with the set screws. Each hub has four threaded mounting holes for #2-56 screws (not included).
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1081-POLOLU Universal Aluminum Mounting Hub for 4mm Shaft, #4-40 Holes (2-Pack)
US$11.55
These universal aluminum mounting hubs allow you to mount custom wheels and mechanisms to 4 mm diameter motor shafts. The set includes two hubs, two #4-40 set screws for securing the hubs to motor shafts, and one 0.05″ Allen wrench for use with the set screws. Each hub has four threaded mounting holes for #4-40 screws (not included).
Delivery within 2-3 weeks
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1996-POLOLU Universal Aluminum Mounting Hub for 3mm Shaft, M3 Holes (2-Pack)
US$8.33
These universal aluminum mounting hubs allow you to mount custom wheels and mechanisms to 3 mm diameter motor shafts. The set includes two hubs, two M3 set screws for securing the hubs to motor shafts, and one 1.5 mm Allen wrench for use with the set screws. Each hub has four threaded mounting holes for M3 screws (not included).
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1997-POLOLU Universal Aluminum Mounting Hub for 4mm Shaft, M3 Holes (2-Pack)
US$10.87
These universal aluminum mounting hubs allow you to mount custom wheels and mechanisms to 4 mm diameter motor shafts. The set includes two hubs, two M3 set screws for securing the hubs to motor shafts, and one 1.5 mm Allen wrench for use with the set screws. Each hub has four threaded mounting holes for M3 screws (not included).
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1998-POLOLU Universal Aluminum Mounting Hub for 5mm Shaft, M3 Holes (2-Pack)
US$11.78
These universal aluminum mounting hubs allow you to mount custom wheels and mechanisms to 5 mm diameter motor shafts. The set includes two hubs, two M3 set screws for securing the hubs to motor shafts, and one 1.5 mm Allen wrench for use with the set screws. Each hub has four threaded mounting holes for M3 screws (not included).
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1999-POLOLU Universal Aluminum Mounting Hub for 6mm Shaft, M3 Holes (2-Pack)
US$12.69
These universal aluminum mounting hubs allow you to mount custom wheels and mechanisms to 6 mm diameter motor shafts. The set includes two hubs, four M3 set screws for securing the hubs to motor shafts, and one 1.5 mm Allen wrench for use with the set screws. Each hub has six threaded mounting holes for M3 screws (not included).
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1994-POLOLU Universal Aluminum Mounting Hub for 1/4″ Shaft, M3 Holes (2-Pack)
US$14.61
These universal aluminum mounting hubs allow you to mount custom wheels and mechanisms to 1/4 inch diameter motor shafts. The set includes two hubs, four M3 set screws for securing the hubs to motor shafts, and one 1.5 mm Allen wrench for use with the set screws. Each hub has six threaded mounting holes for M3 screws (not included).
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1993-POLOLU Universal Aluminum Mounting Hub for 1/4″ Shaft, #4-40 Holes (2-Pack)
US$12.69
These universal aluminum mounting hubs allow you to mount custom wheels and mechanisms to 1/4 inch diameter motor shafts. The set includes two hubs, four #4-40 set screws for securing the hubs to motor shafts, and one 0.05″ Allen wrench for use with the set screws. Each hub has six threaded mounting holes for #4-40 screws (not included).
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953-POLOLU Ball Caster with 1/2″ Metal Ball
US$3.62
This ball caster kit includes a black ABS housing, a 1/2″ diameter metal ball, two spacers (1/16″ and 1/8″ thick), and two #2 screw sets. The total height of the ball caster, 0.53″, can be increased to about 0.7″ using the included spacers. The two included #2 screws can be used to mount the ball caster to your chassis.
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1078-POLOLU Universal Aluminum Mounting Hub for 3mm Shaft, #4-40 Holes (2-Pack)
US$8.33
These universal aluminum mounting hubs allow you to mount custom wheels and mechanisms to 3 mm diameter motor shafts. The set includes two hubs, two #4-40 set screws for securing the hubs to motor shafts, and one 0.05″ Allen wrench for use with the set screws. Each hub has four threaded mounting holes for #4-40 screws (not included).
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