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  1. K

    Mac Motor Axle Thread Guage?

    Just in case anyone else needs this information in future, turns out the correct size is indeed M12 Fine Thread 1.25mm Vendor had originally sent me the wrong thread gauge, but I didn't know until I got a thread gauge and measured it.
  2. K

    Mac Motor Axle Thread Guage?

    I have one of the newer Mac motors with the 12mm axle not the older 14mm. I have lost one of the axle bolts but I can’t find what the gauge is anywhere. I’ve bought and tried: M12 Standard Thread M12 Fine Thread 1.25m M12 1.0mm Nothing fits. Does anyone know what the correct size is? I...
  3. K

    Are Cell Spacers Necessary?

    You make a valid point. Has anyone used cell wraps: https://www.fogstar.co.uk/products/21700-pvc-wraps How loose are they initially? Can you fit them over a cell that is already wrapped before you shrink them? (To double wrap them)
  4. K

    My "Mark 2" solar trailer

    Really interesting project good luck. By the way you can get a ' buck-boost solar controller' and cheap too, I have one which I had intended using for a similar project...
  5. K

    72V 40AH, 150 amp capable battery build

    Where did you get those honeycomb style 21700 cell spacers from?
  6. K

    Are Cell Spacers Necessary?

    For my next battery build I’ll be looking to stuff as many cells in an EEB frame as possible. I used the standard 21700 cell spacers in my last build but obviously not using spacers would allow a lot more cells in total. I’ve seen people hot glue cells together, then fish tape parallel...
  7. K

    First Hub Wheel Build

    Ah, that’s two throttles one controller, I’m looking at the reverse.
  8. K

    First Hub Wheel Build

    Interesting, can you link to the review?
  9. K

    First Hub Wheel Build

    All sorted now, using two TAs both of which I filed down to perfect fit the axle flats. My next question is around using one throttle on two controllers. I’ve seen how this is done normally with the signal cable split off to the second controller. This new setup I have uses Higo connectors...
  10. K

    First Hub Wheel Build

    Well the new TA turned up, the flat to flat distance is stated as 10.17mm which I suppose would be alright for an axle with 10mm flats. However, when I measure my TA distance I get around 10.2mm and when I measure my axle with digital calipers, my axle flats are more like 9.98mm. Doesn't sound...
  11. K

    First Hub Wheel Build

    So I almost had a catastrophic failure with the new wheel on first test. I installed the new motor on a hard tail MTB I have using a substantial torque arm which I picked up from a forum member several years ago. I bought several of them, I think they were water-jetted and are obviously steel...
  12. K

    First Hub Wheel Build

    I’m a total convert to hydraulic brakes. I can’t believe I’ve spent so many years mucking around with avid cable brakes, so many hours troubleshooting rubbing brake pads. These Clark M2 hydros are amazing and insanely cheap as well. For £40 / $50 you get two brake levers, two brake calipers...
  13. K

    First Hub Wheel Build

    My first wheel build is complete, it wasn't as hard as I was expecting, here are some thoughts: I ended up buying a comically expensive sapim nipple wrench, only to find that I couldn't use it, for two reasons. The gap between the two 'blades' on the wrench isn't big enough to fit over the...
  14. K

    First Hub Wheel Build

    Some progress today, I spoked up the hub by copying an existing wheel I have. I used a couple of rolls of tape to lift up and hold the hub in place, then various books to raise the rim up to the right height. I think I must have made just about every mistake you can make which is to be...
  15. K

    First Hub Wheel Build

    I've ordered in a truing stand, nothing special, but I do like the idea of being able to sit at my kitchen table while learning to true.
  16. K

    First Hub Wheel Build

    Thanks for your input, can I ask: 1) Pre-bend the j-bends how? 2) How do I find out what the max spoke tension should be? Is this a parameter defined by the wheel rim? Edit: Just found the figure 100 - 135KGs - seems a lot! 3) Boiled linseed oil - do you literally just dip the threaded part...
  17. K

    First Hub Wheel Build

    Had to order the spokes from one retailer and nipples from another, they were the only two UK retailers who had them. Sapim e-strong spokes & Sapim BAT Reducer nipples. Do I need to buy a wheel truing stand for a one-off wheel build? (Might do a couple more in the future) If so which one?
  18. K

    DMHC Controller Tech Sheet

    The website has the old kits on show but they have this new kit with the Hugo Juliette connectors now too which isn’t online yet. The unloaded max speed is showing as 32mph, which seems about right considering the wind I requested 10T and the voltage I tested at 50.2V.
  19. K

    First Hub Wheel Build

    What spoke lube do you recommend ? I see wheelsmith spoke prep / spoke dope is popular in the states but it’s not readily available in the UK.
  20. K

    First Hub Wheel Build

    I have the RIM and I have now measured it using the fine instructional video at GRIN and everything matches the given specs. Chalo, I have checked my existing wheel builds and noticed something for the very first time: The spokes on the drive side (right) are elbowed outside where as the...
  21. K

    DMHC Controller Tech Sheet

    OK so I powered up for the first time and the display unit was already set to 52V battery. Having said that I’m not sure exactly what was and what wasn’t configured by MacmotorTech. I found a manual online because of course there is zero information with the kit. When I go into settings, the...
  22. K

    DMHC Controller Tech Sheet

    Hey Dan, thanks for your input on this, I was thinking along the same lines as you. I do have both 12S and 14s packs available so I think I'll try the 12S first which will be around 50V fully charged. I'll see what options are available on the display to see if there is an option for a 52V...
  23. K

    DMHC Controller Tech Sheet

    I have just received a kit from MacmotorTech that comes with a DMHC controller. It looks like it's this: http://www.e-dmhc.com/product?id=10 It's tiny for an 18fet controller! I can't find any tech sheet for it, so I don't know what the max voltage is, I want to use my 52V battery so...
  24. K

    First Hub Wheel Build

    My first thread in a long time..... I'm about to build up a rear wheel (for the first time) using a Mac motor and I will have noob questions I hope the elders can answer. I've never done this before and would have preferred to pay someone else to do it, but the options these days are limited...
  25. K

    MAC motor worth it?

    Hey bullfrog, are you using the new 18fet controller from Mac? If not what controller are you using to feed the 55A ?
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