Does that matter Kenny ???Remember the bolt is hollow.
Ah I see clear as mud eh. As you say it's chocked with mud just blew through it. Yes goes into brass right enough might struggle to get similar but I think it needs to be longer as losing 5mm with the bash plate. ThanksSpecialized have done this for a reason, I think because it goes into a blind hole, in a brass insert I think, and this allows the air to get out as you screw it in. By the way it is alloy. Also every ride at the moment is a mucky one and the hole gets blocked so not sure any of this matters.
Yes see wPerhaps another thing to bear in mind is the job of this bolt. Torque is 6.2Nm, not a lot for such a big bolt. I wonder if it's not so much about fastening the whole battery in as fastening itself in and acting as a kind of peg for the battery to hang from.
Doesn't move about either I'm just concerned only getting couple of turns in now with bash plate. Saying that 750 miles seems okPerhaps another thing to bear in mind is the job of this bolt. Torque is 6.2Nm, not a lot for such a big bolt. I wonder if it's not so much about fastening the whole battery in as fastening itself in and acting as a kind of peg for the battery to hang from.
Your on the ball Kenny must be engineering background. So I need to get alloy just a wee bit longer, getting more Speacialized as we speak. My aluminium extra bash guard i am adding on approx 4mm thread.Just checked the bolt connecting the bash guard to the battery as it also screws into a brass bush. It's alloy, looks like specialized don't like steel bolts screwing into brass.
Looking for 5 mm dinna think I would get that much to be honest if I counter bored it. Chase up bolt folk tomorrowJust had a wee look round the internet, brass and steel threads leads to corrosion. Purely as an aside, the motor mounting bolts are also alloy, wonder if there is brass bush in there - also there are brass bushes in the engine cover, wonder if the screws are alloy. Have you considered counter boring the new bash guard?
Think its alloy as the battery insert is brass, struggling to find anything online that big to be honest.Try eBay. A seller called Kayfast is one of my favourites and they will sell small quantities. They do lots of Stainless bolts. A2 and A4 grade. Fast delivery too.
Could be right there some big rocks clattering off it on some of the hill tracks i've come down . One managed to knock the battery plug out the other week. Going to see if i can get some big squares of Velcro and try that .Seems a high risk way to fix a bash guard anyway imho. Any impact is fed direct via the scree to the brass threaded insert in the battery.
Don't want to lose any more clearance for bash plate I'm no lightweight. Rocks can bounce off any thing just pot luck what they hit , big tyres are great but throw a lot of crap up at you .The only time I have had an impact on that bit of my bike was a rock step on a climb...in which case any guard would act as a skid plate. What is needed then is not only surface protection but distribution of the impact.
The World's largest electric mountain bike community.