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  • Caster bearing help

    I need bearings with the description of 7/8 x 5/16 608-2MS. Can anyone help me find a comparable item online? The DME is wanting $10 per bearing (not including shipping). Thanks.
    Aerodynamically, the bumble bee shouldn't be able to fly, but the bumble bee doesn't know that, so it goes on flying anyways--Mary Kay Ash

  • #2
    My bearings froze up in one wheel the other day. Went to a skate shop and they sold me a 2 pack for $5, and changed them.
    Attached Files
    Last edited by Jim; 11-21-2018, 02:59 PM.

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    • #3
      DMEHUB.COM has good prices and good advice. I bought mine on Amazon. I think it was a 10-pack for $8.

      Caster bearings shouldn't be hard to DIY. Caster fork bearings can be difficult.
      Last edited by August West; 11-21-2018, 06:11 PM.

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      • #4
        Any skateboard shop has them. And may pop them in for free.
        I have had periodic paralysis all my life. I lost my ability to walk in 2011 beginning with a spinal block, which was used for a hip fracture caused by periodic paralysis.

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        • #5
          7/8 x 5/16 is the outer race x the size of the axle diameter. You just need to measure the thickness and Bob's your Uncle. The 608-2MS seems to be a Sunrise number. Ebay is a good source, just make sure they're sealed bearings.

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          • #6
            Your DME is a crook

            https://www.amazon.com/gp/product/B07216D1SZ/

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            • #7
              And the DME shipping charge will probably cost more than the bearing.

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              • #8
                No skate shop near me. I need double sealed bearings and it's for a powerchair. How do I know the ones posted above are the right size? Should I remove the bearing to get the third dimension? Yes...shipping would be about $10.

                I don't mind going through a DME or wherever, but if I can get them considerably less online that would be great.
                Aerodynamically, the bumble bee shouldn't be able to fly, but the bumble bee doesn't know that, so it goes on flying anyways--Mary Kay Ash

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                • #9
                  Originally posted by november View Post
                  I need bearings with the description of 7/8 x 5/16 608-2MS....
                  As you stated 608-2MS are your bearings. These are them, fully sealed: https://www.amazon.com/608-2RS-Beari.../dp/B002BBCX0Q
                  Price is high even including shipping. You can probably find something less, just google 608-2MS.
                  I have had periodic paralysis all my life. I lost my ability to walk in 2011 beginning with a spinal block, which was used for a hip fracture caused by periodic paralysis.

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                  • #10
                    Originally posted by november View Post
                    No skate shop near me. I need double sealed bearings and it's for a powerchair. How do I know the ones posted above are the right size? Should I remove the bearing to get the third dimension? Yes...shipping would be about $10.

                    I don't mind going through a DME or wherever, but if I can get them considerably less online that would be great.
                    To be certain you need to know the thickness. If you remove the bearing there should be a number on it, that should also get you to the correct bearing with a web search. I'm not sure about what Andy linked to as the measurements are metric, according to Sunrise the bearing is in inches. The metric measurements are close but could be tight or sloppy.

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                    • #11
                      I did google 608-2MS and only the Sunrise Medical bearing comes up with the two dimensions. Online the medical supply places are asking $11-$14 each for that exact item number. That is why I was asking for help here. There are 608-2RS bearings out there. Wasn't sure what the difference between the "M" and "R" would be. The Sunrise one I need is in inches and when I convert it to metric one measure is right on, but the second is only super close...like Rusty said it could be tight or sloppy then. I didn't know if that would be an issue. The bearing "nonoise" linked has one dimension right on, but the other dimension is 22 mm or 0.866154" and I need 7/8" which converts to 0.875".

                      ETA: Thanks. I'll get someone to remove the bearing.
                      Aerodynamically, the bumble bee shouldn't be able to fly, but the bumble bee doesn't know that, so it goes on flying anyways--Mary Kay Ash

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                      • #12
                        There are no special wheelchair bearings. Sunrise is putting inch sizes to confuse things and make it look special in a probable effort to support their DME dealer racket as you directly experienced. 608 is the size, 608 it is. You can get either metal shielded for cheap, or plastic/rubber sheilded for more $$ with possibly dubious benefit. If you are plowing though snow, cheap and replace often is best, as no bearing can handle what amounts to an underwater environment long-term. There is stainless steel versions too, but be certain that the balls are stainless also and not just the body, or vice-versa. Cost/benefit on those should be examined also.

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                        • #13
                          Have to agree with Andy on this one.

                          I once picked up a set of roller blades for $5 at a garage sale.
                          Scored a nice deal on a lot of bearings from that spot. I made sure they were in good enough condition as replacements or even as emergency bearings to have on hand.
                          I?m sure I have a few kicking around in my fishing tackle box, now converted and nicely organized of all my wheelchair parts and tools needed. Makes it easier to just grab the box and work on my chair anyhwhere.

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                          • #14
                            I got mine on Amazon, also a 8 or 10 pack for less than, same exact part number on both.plus free shipping and had inv2 days

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                            • #15
                              I can?t get the top bearing off the stem of my backup tr3, I have sprayed with rust breaker to no avail. Anyone ever use bearing or terminal puller to get stem bearings off?
                              Originally posted by nonoise View Post
                              As you stated 608-2MS are your bearings. These are them, fully sealed: https://www.amazon.com/608-2RS-Beari.../dp/B002BBCX0Q
                              Price is high even including shipping. You can probably find something less, just google 608-2MS.
                              Bike-on.com rep
                              John@bike-on.com
                              c4/5 inc funtioning c6. 28 yrs post.
                              sponsored handcycle racer

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