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  • Axle diameters ...

    Information I believe may well be of value. Esp when trying to fit together various manufacturers parts.

    Carrera/knurled ends . . . . . ... . 2.19mm . . . .086" . . . 2.752/32

    FLY/black/smooth ends . . . .. . .. 2.40mm . . . .094" . . . 3.008/32
    FLY/knurled ends . . . . . . . .. . .. 2.37mm . . . .093" . . . 2.976/32
    FLY/race/cutouts for wheels . . .. 2.50mm . . . .098" . . . 3.136/32
    there's one more FLY to be measured. newest FLY cars i believe have smooth axles. i happen not to own any of those cars.

    HSRR/McLaren M8D/knurled ends . 2.50mm. . . .098" . . . 3.136/32

    MRRC/Cobra-Chaparral2/smooth . 2.40mm . . . .094" . . . 3.008/32
    MRRC/Toyota Celica/knurled. . . . 2.52mm . . . .099" . . . 3.168/32
    MRRC/Chaparral 2F/knurled. . . .. 2.40mm . . . .094" . . . 3.008/32
    MRRC/Sebring chassis/knurled . . 2.40mm . . . .094" . . . 3.008/32

    NINCO/std/smooth ends.. . . . . . 2.47mm . . . .097". . . 3.104/32
    NINCO/pro race/smooth ends. . . 2.48mm . . . .0975" . . 3.120/32

    Revell-Monogram/knurled . . . . . 2.20mm . . . .087" . . . 2.784/32
    Revell-Monogram/King Cobra-Porsche 904-Chaparral2/all use MRRC Sebring chassis

    SCX/smooth ends . . . . . . . . .. 2.38mm . . . .094" . . . 3.008/32

    Scalextric/smooth ends . . . . .. ??????
    Scalextric/knurled ends . . . . .. 2.39mm . . . .094" . . . 3.008/32

    Sloter/smooth ends . . . . . . . . 2.51mm . . . .099" . . . 3.168/32
    Sloter Race . . . . . . . . . . . . .. ?????

    Slot.It/smooth ends. . . . . . . . 2.38mm . . . .094" . . . 3.008/32

    Spirit/smooth ends . . . . . . . . 2.40mm . . . .094" . . . 3.008/32

    Team Slot/smooth ends . . . .. 2.48mm . . . .098" . . . 3.136/32

    Perhaps this would best be edited to show only the metric measurement. Certainly that is the most meaningful information of the listings above.
    Perhaps a digital caliper that reads farther than thousandths of an inch.

    I've a few more to measure.
    Last edited by monquispot; 08-20-2007, 10:55 AM.

  • #2
    monkee
    Thanks for the info. Please keep those english unit for us guys that know the world in thousandths and have these micrometers.
    jethro

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    • #3
      yeah. problem is not all those 094s are equal. just try putting slot.it wheels on a spirit axle.

      Comment


      • #4
        Great stuff; we will have to bump this over to Tech & maybe Stick it there as a reference soon.

        Avant-Slot smooth axle is 2.41mm" or .0945"

        Scalextric A1 (knurled? I haven't tried pulling the wheels off) is 2.33mm or .0915"
        Last edited by Wet Coast Racer; 08-14-2007, 07:06 PM. Reason: Did a quick imperial remeasure on the Avant-Slot

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        • #5
          Are you measuring in metric and then converting?






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          • #6
            Ninco axles

            Ninco stand and pro-race axles are all "rated" at 2.48mm, sorry dont have a mocrometer, but when I replaced a FLY Race crown gear the other day (axle 2.50mm) I had to ream out the Ninco crown gear as it was a fraction too tight - wich ties up with the FLY axle being 2.5mm and the Ninco pro-race crown made for a 2.48mm axle.

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            • #7
              Good info! I would go one more decimal on the english units.
              2.38 mm = .0937"
              2.40 mm = .0945"

              Best regards,
              Brian

              Comment


              • #8
                Are you measuring in metric and then converting?
                I have digital calipers! (He said, rather smugly.)

                There's a conversion button on 'em, but it does seem most accurate to select the type of measurement, then set zero, and then measure; rather than just pushing the conversion button after measuring. Hopefully this makes sense. Wouldn't want to provide any wrong numbers.

                Comment


                • #9
                  Watch those round-offs!

                  3/32" is often reported to five decimal places, in English units: .09375"

                  However, some digital calipers may give you more decimal places than you are actually measuring.

                  .09375" x 25.4mm to the inch = 2.38125mm

                  3/32" is usually called 2.38mm.

                  2.5mm is usually called .098", but is mathematically .0984251. You can't really measure much below a half a thousandth, with most tools, so call it .0984.

                  I use a General brand dial caliper, which is close enough for me.

                  Comment


                  • #10
                    Specs

                    Originally posted by monquispot View Post
                    Information I believe may well be of value. Esp when trying to fit together various manufacturers parts.

                    Carrera/knurled ends . . . . . ... . 2.19mm . . . .086" . . . 2.752/32

                    FLY/black/smooth ends . . . .. . .. 2.40mm . . . .094" . . . 3.008/32
                    FLY/knurled ends . . . . . . . .. . .. 2.37mm . . . .093" . . . 2.976/32
                    FLY/race/cutouts for wheels . . .. 2.50mm . . . .098" . . . 3.136/32
                    there's one more FLY to be measured. newest FLY cars i believe have smooth axles. i happen not to own any of those cars.

                    MRRC/Cobra-Chaparral2/smooth . 2.40mm . . . .094" . . . 3.008/32
                    MRRC/Toyota Celica/knurled. . . . 2.52mm . . . .099" . . . 3.168/32
                    MRRC/Chaparral 2F/knurled. . . .. 2.40mm . . . .094" . . . 3.008/32
                    MRRC/Sebring chassis/knurled . . 2.40mm . . . .094" . . . 3.008/32

                    Revell-Monogram/knurled . . . . . 2.20mm . . . .087" . . . 2.784/32
                    Revell-Monogram/King Cobra-Porsche 904-Chaparral2/all use MRRC Sebring chassis

                    SCX/smooth ends . . . . . . . . .. 2.38mm . . . .094" . . . 3.008/32

                    Scalextric/smooth ends . . . . .. ??????
                    Scalextric/knurled ends . . . . .. 2.39mm . . . .094" . . . 3.008/32

                    Sloter/smooth ends . . . . . . . . 2.51mm . . . .099" . . . 3.168/32
                    Sloter Race . . . . . . . . . . . . .. ?????

                    Slot.It/smooth ends. . . . . . . . 2.38mm . . . .094" . . . 3.008/32

                    Spirit/smooth ends . . . . . . . . 2.40mm . . . .094" . . . 3.008/32

                    Team Slot/smooth ends . . . .. 2.48mm . . . .098" . . . 3.136/32

                    Perhaps this would best be edited to show only the metric measurement. Certainly that is the most meaningful information of the listings above.
                    Perhaps a digital caliper that reads farther than thousandths of an inch.

                    I've a few more to measure.
                    Any specs on NSR axles? I use lots of NSR axle kits on my cars.

                    Comment


                    • #11
                      Specs

                      Originally posted by Robert Livingston View Post
                      Watch those round-offs!

                      3/32" is often reported to five decimal places, in English units: .09375"

                      However, some digital calipers may give you more decimal places than you are actually measuring.

                      .09375" x 25.4mm to the inch = 2.38125mm

                      3/32" is usually called 2.38mm.

                      2.5mm is usually called .098", but is mathematically .0984251. You can't really measure much below a half a thousandth, with most tools, so call it .0984.

                      I use a General brand dial caliper, which is close enough for me.
                      I'm grateful for the wealth of info there. Meant to ask about specs for MBSlot axles??? And as earlier mentioned, NSR????

                      Comment


                      • #12
                        Was wondering about how monquispot is gathering his numbers.




                        Originally posted by Wet Coast Racer View Post
                        I have digital calipers! (He said, rather smugly.)

                        There's a conversion button on 'em, but it does seem most accurate to select the type of measurement, then set zero, and then measure; rather than just pushing the conversion button after measuring. Hopefully this makes sense. Wouldn't want to provide any wrong numbers.






                        Comment


                        • #13
                          Oh, I am pretty sure he eyeballs it.

                          Comment


                          • #14
                            I just had this terrible vision

                            of a hand reaching up from a removable patch on the track, . . . as your precious car whizzes by, the hand reaches up, WHOOSH, car vanishes, a voice is heard muttering bag fulls of tiny numbers, then POP, the car reappears on the track 10 seconds later.

                            A voice below the track resounds . . "and the MB SLOT axle is . . . ."

                            Comment


                            • #15
                              Crunching numbers is one thing but letting Wet Coast loose with a sensitive caliper? OMG!!!!!! And I thought "Alien" was scary . Sorry, couldn't help myself

                              Anyhoo, I was changing the front stubs on several Fly 917k's and 917LH's last night and found that Slot.It axles fit the hubs instead of the normal larger diameter trditional Fly axles. Is Fly switching over to the more uniform 2.38 mm axles? Most older Fly cars seem to have a much larger diameter axle that will not fit Slot.It hubs.

                              KIITS,
                              Lawrence

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