If you're connecting shafts of two different sizes or even two of the same, you'll need a coupler to join them. be sure to pay attention to the Imperial vs. Metric sizes.

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  1. Universal Mounting Hub - 5mm Aluminum
    SKU: ROB-10006 Brand: Sparkfun
    The universal aluminum mounting hub allows you to mount custom wheels and mechanisms to 5 mm motor shafts. The hubs are sold in pairs. The set includes one Allen wrench and two 4-40 set screws for securing the hubs to motor shafts.
  2. Aluminum Flex Shaft Coupler - 5mm to 5mm
    Rating:
    90% of 100
    SKU: ADA1175 Brand: Adafruit
    Connect this to that with a set-screw coupler. These couplers are made of machined aluminum and have a spiral cut that makes them slightly flexible so they can be...
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    2 from local stock, 1 supplier stock; your order will dispatch between Dec 1 to Dec 10. And yes, stock levels and lead times are accurate!

    Delivered by Apr 22nd
  3. Aluminum Flex Shaft Coupler - 5mm to 10mm
    Rating:
    100% of 100
    SKU: ADA1177 Brand: Adafruit
    Connect this to that with a set-screw coupler. These couplers are made of machined aluminum and have a spiral cut that makes them slightly flexible so they can be...

    Out of Stock

    Sign up to get notified when it's available to order.

  4. Aluminum Flex Shaft Coupler - 5mm to 8mm
    Rating:
    100% of 100
    SKU: ADA1176 Brand: Adafruit
    Connect this to that with a set-screw coupler. These couplers are made of machined aluminum and have a spiral cut that makes them slightly flexible so they can be...
    - +

    0 from local stock, 1 supplier stock; your order will dispatch between Dec 1 to Dec 10. And yes, stock levels and lead times are accurate!

    Available with 8 to 12 day lead time
  5. Pololu Universal Aluminum Mounting Hub for 3mm Shaft, #4-40 Holes (2-Pack)
    SKU: POLOLU-1078 Brand: Pololu
    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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    0 from local stock, 1 supplier stock; your order will dispatch between Dec 1 to Dec 10. And yes, stock levels and lead times are accurate!

    Available with 4 to 7 day lead time
  6. Pololu Universal Aluminum Mounting Hub for 3mm Shaft, #2-56 Holes (2-Pack)
    Rating:
    90% of 100
    SKU: POLOLU-1079 Brand: Pololu
    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).
    - +

    0 from local stock, 1 supplier stock; your order will dispatch between Dec 1 to Dec 10. And yes, stock levels and lead times are accurate!

    Available with 4 to 7 day lead time
  7. Pololu Universal Aluminum Mounting Hub for 3mm Shaft, M3 Holes (2-Pack)
    SKU: POLOLU-1996 Brand: Pololu
    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).
    - +

    6 from local stock, 1 supplier stock; your order will dispatch between Dec 1 to Dec 10. And yes, stock levels and lead times are accurate!

    Delivered by Apr 22nd
  8. Pololu Universal Aluminum Mounting Hub for 4mm Shaft, #4-40 Holes (2-Pack)
    Rating:
    93% of 100
    SKU: POLOLU-1081 Brand: Pololu
    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).
    - +

    5 from local stock, 1 supplier stock; your order will dispatch between Dec 1 to Dec 10. And yes, stock levels and lead times are accurate!

    Delivered by Apr 22nd
  9. Pololu Universal Aluminum Mounting Hub for 4mm Shaft, M3 Holes (2-Pack)
    SKU: POLOLU-1997 Brand: Pololu
    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).
    - +

    1 from local stock, 1 supplier stock; your order will dispatch between Dec 1 to Dec 10. And yes, stock levels and lead times are accurate!

    Delivered by Apr 22nd
  10. Pololu Universal Aluminum Mounting Hub for 5mm Shaft, #4-40 Holes (2-Pack)
    SKU: POLOLU-1203 Brand: Pololu
    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 #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).
    - +

    2 from local stock, 1 supplier stock; your order will dispatch between Dec 1 to Dec 10. And yes, stock levels and lead times are accurate!

    Delivered by Apr 22nd
  11. Pololu Universal Aluminum Mounting Hub for 5mm Shaft, M3 Holes (2-Pack)
    Rating:
    100% of 100
    SKU: POLOLU-1998 Brand: Pololu
    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).
    - +

    5 from local stock, 1 supplier stock; your order will dispatch between Dec 1 to Dec 10. And yes, stock levels and lead times are accurate!

    Delivered by Apr 22nd
  12. Pololu Universal Aluminum Mounting Hub for 6mm Shaft, #4-40 Holes (2-Pack)
    Rating:
    90% of 100
    SKU: POLOLU-1083 Brand: Pololu
    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 #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).
    - +

    1 from local stock, 1 supplier stock; your order will dispatch between Dec 1 to Dec 10. And yes, stock levels and lead times are accurate!

    Delivered by Apr 22nd
  13. Pololu Universal Aluminum Mounting Hub for 1/4″ Shaft, #4-40 Holes (2-Pack)
    SKU: POLOLU-1993 Brand: Pololu
    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 four threaded mounting holes for #4-40 screws (not included).
    - +

    0 from local stock, 1 supplier stock; your order will dispatch between Dec 1 to Dec 10. And yes, stock levels and lead times are accurate!

    Available with 4 to 7 day lead time
  14. Pololu Universal Aluminum Mounting Hub for 1/4″ Shaft, M3 Holes (2-Pack)
    SKU: POLOLU-1994 Brand: Pololu
    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 four threaded mounting holes for M3 screws (not included).
    - +

    0 from local stock, 1 supplier stock; your order will dispatch between Dec 1 to Dec 10. And yes, stock levels and lead times are accurate!

    Available with 4 to 7 day lead time
  15. Pololu Universal Aluminum Mounting Hub for 6mm Shaft, M3 Holes (2-Pack)
    Rating:
    96% of 100
    SKU: POLOLU-1999 Brand: Pololu
    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).
    - +

    3 from local stock, 1 supplier stock; your order will dispatch between Dec 1 to Dec 10. And yes, stock levels and lead times are accurate!

    Delivered by Apr 22nd
  16. Pololu Universal Aluminum Mounting Hub for 8mm Shaft, M3 Holes (2-Pack)
    SKU: POLOLU-2693 Brand: Pololu
    These universal aluminum mounting hubs allow you to mount custom wheels and mechanisms to 8 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).
    - +

    4 from local stock, 1 supplier stock; your order will dispatch between Dec 1 to Dec 10. And yes, stock levels and lead times are accurate!

    Delivered by Apr 22nd
  17. 4001 Series Clamping Servo to Shaft Coupler (25 Tooth Spline to 6mm Round Bore)
    SKU: GB-4001-0025-0006 Brand: goBilda
    This coupler allows you to fasten a 6mm diameter shaft in-line with the output spline of a servo. The clamping feature insures that the.....
    - +

    0 from local stock, 1 supplier stock; your order will dispatch between Dec 1 to Dec 10. And yes, stock levels and lead times are accurate!

    Available with 7 to 10 day lead time
  18. 4001 Series Clamping Servo to Shaft Coupler (25 Tooth Spline to 8mm REX Bore)
    SKU: GB-4001-0025-4008 Brand: goBilda
    This coupler allows you to fasten an 8mm REX shaft in-line with the output spline of a servo. The clamping feature insures that the shaft.....
    - +

    3 from local stock, 1 supplier stock; your order will dispatch between Dec 1 to Dec 10. And yes, stock levels and lead times are accurate!

    Delivered by Apr 22nd
  19. 4007 Series Hyper Coupler (6mm Round Bore to 6mm Round Bore)
    SKU: GB-4007-0006-0006 Brand: goBilda
    4007 Series Hyper Coupler (6mm Round Bore to 6mm Round Bore)
    - +

    3 from local stock, 1 supplier stock; your order will dispatch between Dec 1 to Dec 10. And yes, stock levels and lead times are accurate!

    Delivered by Apr 22nd
  20. 4006 Series Hyper Coupler (6mm D-Bore to 5mm Hex Bore)
    SKU: GB-4006-1006-2005 Brand: goBilda
    For those using REV Robotics parts within FTC, this coupler will allow you to adapt from a
    - +

    0 from local stock, 1 supplier stock; your order will dispatch between Dec 1 to Dec 10. And yes, stock levels and lead times are accurate!

    Available with 7 to 10 day lead time
  21. 4007 Series Hyper Coupler (6mm D-Bore to 6mm D-Bore)
    SKU: GB-4007-1006-1006 Brand: goBilda
    This 6mm D-Bore to 6mm D-Bore Hyper Coupler is a strong, compact, balanced way to couple two shafts together. As with all ‘Hyper’ parts,.....
    - +

    0 from local stock, 1 supplier stock; your order will dispatch between Dec 1 to Dec 10. And yes, stock levels and lead times are accurate!

    Available with 7 to 10 day lead time
  22. 4006 Series Hyper Coupler (8mm Round Bore to 6mm D-Bore)
    SKU: GB-4006-0008-1006 Brand: goBilda
    This Hyper Coupler has an 8mm round bore on one end and a 6mm D-bore on the other. While it has many uses, one common one is to join the.....
    - +

    1 from local stock, 1 supplier stock; your order will dispatch between Dec 1 to Dec 10. And yes, stock levels and lead times are accurate!

    Delivered by Apr 22nd
  23. 4007 Series Hyper Coupler (8mm Round Bore to 8mm REX Bore)
    SKU: GB-4007-0008-4008 Brand: goBilda
    4007 Series Hyper Coupler (8mm Round Bore to 8mm REX Bore)
    - +

    4 from local stock, 1 supplier stock; your order will dispatch between Dec 1 to Dec 10. And yes, stock levels and lead times are accurate!

    Delivered by Apr 22nd
  24. 4007 Series Hyper Coupler (8mm REX Bore to 8mm REX Bore)
    SKU: GB-4007-4008-4008 Brand: goBilda
    This 8mm REX bore Coupler allows you to connect
    - +

    2 from local stock, 1 supplier stock; your order will dispatch between Dec 1 to Dec 10. And yes, stock levels and lead times are accurate!

    Delivered by Apr 22nd
  25. 4007 Series Hyper Coupler (6mm D-Bore to 8mm REX Bore)
    SKU: GB-4007-1006-4008 Brand: goBilda
    This 6mm D-Bore to 8mm REX bore Hyper Coupler is a strong, compact, balanced way to couple two shafts together. Maybe you have motors with.....
    - +

    5 from local stock, 1 supplier stock; your order will dispatch between Dec 1 to Dec 10. And yes, stock levels and lead times are accurate!

    Delivered by Apr 22nd
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