Bloody hell, you try to help someone and look what happens.........as you can't be bothered to take notice, f-off, fit what you bolts you think and kill yourselves............I actually don't effing care about d***heads very much.
And it does not need to be. While you may have read the technical details, it is clear you don't understand them.
I obviously comprehend the matter far better than you do, so don't try to tell me I don't. Everything you have said on here has been shot down by your own referenced expert; who I actually bothered to contact yesterday for your and others benefit. Even though you took great delight in posting your expert's website, the point you were hoping to make isn't actually addressed on his website (so it was a pointless post on your part) which is why I asked him to confirm what I always knew. Despite the facts being in front of you several times, you come up with something else and each time you do that you make a statement which is blatantly incorrect...... For example, you are now saying that the OEM 10.9 bolt isn't necessary................well, the manufacturer's seem to think it is, but of course you obviously know better than Ducati, don't you? Fact: The disc to wheel hub is known as a plate joint. Fact: The plate joint relies on the design strength which comprises the correct tensile strength bolts....correctly torqued. Fact: Stainless steel does not have the same tensile strength as the OEM steel bolts. Fact: Using stainless instead of the correct strength bolts makes the joint sub-standard to the designed strength. Fact: Stainless steel bolts, having a lesser tensile strength become 'stretched' more readily when under load. Fact: When under load the stainless steel bolts allow the plate joint to weaken even further. Fact: When you are doing 60mph and you hit the brakes hard, enough to stop the disc from rotating, your front wheel is doing two things. Fact: It is skidding but still trying to turn. Fact: With a sub-standard plate joint, the wheel is trying to turn against the stopped disc. Fact: The bolts are not under enough tension to pull the threads, only enough to weaken the plate joint. Fact: The bolts are therefore under a shear condition. I just hope that others reading this thread have more common sense than you do. Whether people wish to adopt your pigheaded argument or they think the same as I do, at least my reasoning won't get them killed. AL PS....Also read Probolt's 'Limitations upon Liability'.
It often amazes me that when someone like AL goes to the trouble of posting detailed technical argument especially on topic, others will "Yawn" or otherwise register their lack of interest. If you're not interested or cannot understand technical comment, move on the next thread and don't clutter it for those that do. For the record, AL is spot on - Anything that reduces safety needs to pointed out again and again even if that does piss some people off. I use stainless fasteners but never on vital components where you need all the safety margin you can get hope this helps
Here we go again....... I'm not denying the facts you have put above, the fact your SS has 10.9 bolts in is a red herring. The OP also asked about his 748R, as I've already pointed out, the OEM bolts are not 10.9 - Fact. Honda use M6 on the blade, even if the grade is 10.9 the strength is still a lot less than an M8 A2-80 stainless bolt - Fact. I didn't realize the SS was such a beast and the braking forces were far higher than any superbike..........................
I made this post a couple of days ago, but nobody has commented yet. So, all you experts, are ProBolt justified in selling stainless brake bolts? Or are they wrong, endangering their customers, and risking being sued?
Quote from the OP's first post on the subject............ "Looking for advice on threads Ducati uses on bolts / fasteners. I assume this hasn't changed over time, my question specifically relates to a 1995 750SS and a 2000 748R." Also if you read the technical details provided by the other specialists posted above; you will find that you are totally incorrect about the strength of A2 stainless compared with 10.9 tensile strength bolts. So you are another person that knows better than Ducati, I guess.
Actually I did.............Read their "Limitations upon Liability".......... I read it as if there is a failure of their workmanship, you might be able to sue them; but more importantly, I get the distinct impression they are leaving it up to the purchaser to satisfy themselves they are making the right choice of product....or in other words tough sh*t if something goes wrong.
Something else for you 'experts' who wish to ignore the information (provided by real specialists which incidentally, I didn't introduce into the subject) is if you look at an OEM brake disc bolt, certainly on the SS; is that it has a very small unthreaded shank of about 2.5mm..................that isn't there because the guy that made the bolts couldn't be bothered to thread it for the full length. No doubt all the people that know better than Ducati will dismiss that as well, but as far as I am concerned, I'm finished posting on this thread...........Please yourself over which choice you make.
Er, no I'm not, read again, I'm comparing a M6 sized 10.9 grade bolt with a M8 sized A2-80 grade bolt. Shear strength on the shank: M6 10.9 approx 18kN M8 A2-80 approx 19.3kN
I said I wouldn't post on this topic again, but f***ing hell, I have seen it all now....... .....apart from being laughable (in fact it has me in stitches), you have just proved what a complete and utter d***head you are and I can see why you are called DANGER Mouse. Of course a bloody M6 10.9 bolt will be weaker than an M8 stainless........an M6 is 2mm smaller diameter, or can't you count? If you are going to compare, you compare like size for like size.......so an M8 10.9 bolt is much stronger than an M8 stainless bolt. A little tip for you............take all your bolts out of your bike and fit everything with bolts that are 2mm smaller. You might find out how bl**dy stupid you are........... Christ, I have never heard anything so bl**dy daft in all my life.......F-off and learn something useful before you try to influence people with your engineering opinions again.
now now ladies put ya handbags away I just hope my titanium disc and caliper bolts from ebay are strong enough now and not some inferior crap !!
Over engineering... Without wishing to provoke any more 'Handbags at dawn', it is true that Stainless or Titanium bolts are not as strong as high tensile steel, but in the now infamous brake disc application they are more than strong enough as the original high tensile setup is well over engineered. Note how Ducati now use 5 bolts per disc where they once used 6. They can do this because the strength of 6 was way more than required, as is 5. Stainless or Titanium disc bolt setups are less strong than steel bolts - but tensile, shear whatever, they are still strong enough... And if you argue with me I shall scream and scream until I'm sick...
