Matrix III adapters arrived. Many thanks.
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My m1at helical have 1400ish miles and absolutely 0 signs of wear. Ymmv
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Good to hear. Mine only made is about 600km before they were pretty stripped.
Somethingâs wrong, either with the gears themselves or installation. Both wheel and motor gear are hardened and should be able to do 10,000km no problem. What does the wear look like?
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Teeth looked like they got shaved down and I found metal shavings in the case.
Howâd you order these? Not on the site and was told the M1-AT arenât compatible with the matrix IIIs.
You ask the magic Boardnamics fairy 
(me)
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Sounds like a poor backlash setup but could also be a softer batch of gears
I shredded one straight cut set but Iâm not sure if it was my backlash or bad material
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So I gotta come out about this.
The Kegel adapters are some absolute fucking BULLSHIT.
I bought the BNM1 at preorder. Apparently the gen1 adapters had an issue, causing me to lose all the pins.
I obliged and bought the ânewâ adapters. Same issue. All 10 pins lost. Has to resort to M6 bolts and JB weld.
I now have 2 BNM1 drives installed on my esk8 with no possibility of using them, even with bolts or pins, as they have sheared off at the adapter making it a useless puck of metal. Canât get pins or bolts into the holes anymore.
What the hell am I supposed to do now, buy a different gear drive? The BNM1 has so far been nothing but a money sink for me, I would most likely have got more use and longevity out of another gear drive, belt drives, chain drives, anything with better made wheel interface adapters.
Kevin get your shit together concerning Kegel. Seriously,. I want to love these drives and have stood behind them for years, but if I canât interface my wheels with them, whatâs the damn point?
Saw that pic and itâs brutal, nothing to go off of there. There is a lot of sheer on those pins so im not sure how to get around it long term. My first thought is to get a reverse twist drill bit and try to extract them, maybe youâll get lucky and get the sheered bits out and then tap the holes to m7 and get the hardest hardware available to replace them again.
Definitely not great that the point of failure has so few workarounds. Seems like a disposable/consumable but canât be easily replaced. Can you take the whole adapter plate off and drill it underwater to keep the bits cool and last longer? If you can drill it clean through you can cut a flat-blade slot in the end of the bolt incase it sheers again to aid in removal - just unscrew it from the back.
Just saw that photo, I have never seen my adapters do that, thatâs a new one. There are a few hundred of these out in the wild, especially since the kegel pulleys use the same interface, so in total around 500.
It is not worth fixing in my opinion, they have to be replaced.
Did this just randomly happen on one side? It looks like one pin fell out and the other 4 sheared.
Easiest design change is to make them 10 pins instead of the 5. At 10NM of peak torque at the motor, that is 27.8NM at the wheel. Thatâs about 316N of shear on each pin in both directions for many cycles.
I have one more motor that I will sacrifice to these drives and then I may have to switch to a pneumatics with newbees drives.
I love thane but these drives kill motors way too fast.
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i think kevball has straight cuts⌠wouldnât that be a fix?
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it would but i donât want straight cut gears much
maybe itâs time. how loud are they.
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2.78 and 2.20 with the possibility of others.
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how do straight cut and those two ratios affect where the motor screws sit in the backlash adjustment slots.
I donât have much clearance between the motor cans and the trucks.
The CTC distance is based on the ratio only. 2.78 helical has the same CTC as 2.78 straight cut.