500EX Key Hub

am-0976

$10.00

$3.00

This is the "500EX Key Hub". It is a slightly different version of the 500 Key Hub. It is manufactured differently, as it is extruded. Also, there is a 1.124 in. diameter boss on each side of the h...Read More

Product Overview

This is the "500EX Key Hub". It is a slightly different version of the 500 Key Hub. It is manufactured differently, as it is extruded. Also, there is a 1.124 in. diameter boss on each side of the hub flange, providing a location for 1.125 in. bore flat sprockets. Are you having a hard time keeping your sprocket concentric with your hub? This hub is the trick.

The bore is a 1/2" hole with two 1/8 in. keyways. Only one keyway is needed to drive most wheels, so the second one is extra.

This hub fits all AndyMark wheels.

Also, the keyways are consistently aligned with the mounting holes.

This part is designed and made in Indiana, USA.

Specifications

  • Bolt Pattern: 0.204" diameter holes, evenly spaced on a 1.875" diameter bolt circle
  • Bore: 0.502-508" diameter bore, with 1/8" keyway (2)
  • Material: 6063 Aluminum
  • Outside Diameter: 2.25"
  • Weight: 0.1 lbs

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14 reviews

  1. star star star star star 5.0 out of 5 stars

    Review

    5 Stars

  2. star star star star star 5.0 out of 5 stars

    Review

    5 Stars

  3. star star star star star 5.0 out of 5 stars

    Review

    5 Stars

  4. star star star star star 5.0 out of 5 stars

    Key Hub

    This is a must have for any FIRST team. We use these for rapid prototyping as well as competition.

  5. star star star star empty_star 4.0 out of 5 stars

    Review

    4 Stars

  6. star star star star star 5.0 out of 5 stars

    Review

    5 Stars

  7. star star star star star 5.0 out of 5 stars

    Review

    5 Stars

  8. star star star star star 5.0 out of 5 stars

    Review

    Boss helps center sprockets on hub.

  9. star empty_star empty_star empty_star empty_star 1.0 out of 5 stars

    3 of 4 good. 1 unusable

    3 of 4 ordered were great. Had to order a replacement for one because key ways we're cut improperly. Replacement part had same problem. Ended up boring them out and using collars instead of original design.

  10. star star empty_star empty_star empty_star 2.0 out of 5 stars

    500EX Ket HUb

    To Whom ot may Concern, The quality of these Hubs were fine but the shipping cost was too high. Overall I am not happy with Andy Mark's quality. The Gearboxes we odered did not ave the correct sprocket size. The Keyed Shafts were oversized and we had to machine them down. The Engineering specifications for product are not always clear.

  11. star star empty_star empty_star empty_star 2.0 out of 5 stars

    Poor Concentricity

    We planned on using this to mount our drive sprocket specifically because of the claim it would help us align the sprocket; unfortunately, the concentricity of the bore and hub shaft is visibly off on all 4 pieces we ordered by a significant amount. This caused our sprocket to wobble (axially and radially) considerably, which isn't good for #25 chain. I suspect we got a bad batch, but I'd hope for better quality control.

  12. star star star empty_star empty_star 3.0 out of 5 stars

    Hub

    Should be standard equipment with the robotics wheels. It takes time to figure out exactly which Hub to order.

  13. star star star star star 5.0 out of 5 stars

    Review

    These fit the 6" Mecanum Wheels much better than the old style hub.

  14. star star star star star 5.0 out of 5 stars

    500EX hub.

    No problems. We are going to order some more.

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