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  • #1

    Hex Head Size

    Hi,
    I have just recieved my new main gear and shaft.I started to put it in the heli and I have noticed that the hex screw to go in the shaft is a different head size to the old one and I don't seem to have the correct size.
    Could someone please tell me what I need to order.
    Thanks
    Hirobo Lama with Electric Conversion
    GraupnerMZ24 PRO





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  • #2
    On my old 250 it used a lot of 1.3mm hex bits. Not sure about yours though if it's the new one.
    Very proud to be an Align-Trex.co.uk Team Pilot!

    SAB    Goblin 700 / V-Bar Blueline 5.3 Pro
    Trex 600 EFL Pro / V-Bar Silverline 5.3 Pro
    Trex 500 FBL /     Beast X
    Futaba 8FG

    Proud Owner of 2 EGS Awards

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    • #3
      1.27mm or 1.3mm

      MIP do a good one that works very well on the 250.
      You have a strong will, but a weak won't.
      Tempus Fugit       even when you don't.

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      • #4
        I have the V1 250 but the new shaft and gear are from the pro but fit.
        I thought my MIP was 1.3 but it must be 1.0.
        More money to spend then
        Hirobo Lama with Electric Conversion
        GraupnerMZ24 PRO





        Comment

        • #5
          Yes the original 250 was fitted with 0.9mm hex screws. The last batch of them came with the 1.3mm screws same as the SE.

          MIP do a 1.3mm and 1.27mm hex driver, get the 1.27mm as it is the correct size.
          You have a strong will, but a weak won't.
          Tempus Fugit           even when you don't.

          Comment

          • #6
            The new Hardware kits have the new 1.3m hex screws. As stated the original 250s have a .9

            The 1.3m is uch better from what I hear. I have a new kit, not fitted these little buggers yet though!
            Trex 700 DFC HV - Trex 550L DFC - 180CFX - Teksumo Night Flyer - DX9 & too much more...
            http://www.rc-hero.co.uk             Models, Spares and Upgrades "Getting Bigger By Being Better"
            Check out our ratings at Trustpilot


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            • #7
              Cheers Mole,ordered the 1.27 mm one.Should be with me Thursday.See you at T2000 soon
              Hirobo Lama with Electric Conversion
              GraupnerMZ24 PRO





              Comment

              • #8
                Thought I'd revive this to see if anyone can help, I'm now the proud owner of a converted 250 DFC, which is nice. However I need to do a bit of maintenance and I seem to have a few bolts that are different sizes to the 2 supplied allen/hex keys. I have what I assume is a .9mm and a 1.3mm Align hex, and 1.5mm and 2mm hex from my 450. The bolt heads are bigger than 1.3 and smaller than 1.5mm. I'm no engineer but I reckon they are 1.4mm, however 1.4mm hex keys seem near impossible to find (hour trawling bing n google)!!! The bolts are holding the motor mount and the one in the main shaft. Any ideas?? Cheers Steve

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                • #9
                  Is the motor an Align unit?
                  The Fleet

                  SAB Goblin 500 sport. (in build)
                  XK K110 on its way. Arrived and superb
                  Blade MCPX (just about airworthy)
                  Trex 450 Pro on Brain 2
                  Raptor 30 V2. Converted to electric with Quick UK conversion
                  Mini Titan super Cobra ah1
                  Alien 550 Quad.3DR Pixhawk
                  Futaba 7C 8FGS 14SG
                  Specktrum DX6i
                  Hovered by me,flown by my boys Nicholas and Edward.
                  Cheers,
                  Paul

                  Comment

                  • #10
                    Hi PKNEC, yes the motor is an Align, the bolts are in the motor mount through the frame, I'm more concerned atm that I can't get the main gear off as I need to replace that and the tail gear.

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                    • #11
                      Sooo I just cut them all off and put new ones in.

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                      • #12
                        If the head of the screw has been overtightened then the hex will have been rounded a bit causing this in between size.
                        Not sure on the room you have around the motor but you could try some thin long nose pliers or failing that a long route would be to take the side frame off so you can get at the motor mount and screws.
                        The Fleet

                        SAB Goblin 500 sport. (in build)
                        XK K110 on its way. Arrived and superb
                        Blade MCPX (just about airworthy)
                        Trex 450 Pro on Brain 2
                        Raptor 30 V2. Converted to electric with Quick UK conversion
                        Mini Titan super Cobra ah1
                        Alien 550 Quad.3DR Pixhawk
                        Futaba 7C 8FGS 14SG
                        Specktrum DX6i
                        Hovered by me,flown by my boys Nicholas and Edward.
                        Cheers,
                        Paul

                        Comment

                        • #13
                          It would appear that you can buy a bag of the same size screws these days and you'll find a few that will fit, a few that won't and a few that aren't even screws.

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