Brembo bolt sheared off
#1
Scooby Regular
Thread Starter
iTrader: (3)
Join Date: Sep 2013
Location: glasgow
Posts: 880
Likes: 0
Received 0 Likes
on
0 Posts
Brembo bolt sheared off
One of the bolts on the back of my front Brembos has completely sheared off, leaving the threaded portion still stuck in the bracket and caliper, would anybody know if its still possible to remove the caliper so I can send it away to get helicoiled?
Or is it possible to drill the threaded portion out?
Thanks
Or is it possible to drill the threaded portion out?
Thanks
#2
Scooby Regular
iTrader: (3)
Join Date: Jan 2013
Location: Oxford
Posts: 739
Likes: 0
Received 0 Likes
on
0 Posts
This happened to me... Had to end up welding a nut to the sheared off part of the bolt and turn it out.
Threads were ruined so had it hellicoiled. I've seen them drilled out too if its sheared off in the caliper body.
If you want a more permanent fix there's repair company's that can put a threaded insert in.
Threads were ruined so had it hellicoiled. I've seen them drilled out too if its sheared off in the caliper body.
If you want a more permanent fix there's repair company's that can put a threaded insert in.
Last edited by InTurbo; 28 September 2015 at 07:22 PM.
#3
Scooby Regular
Thread Starter
iTrader: (3)
Join Date: Sep 2013
Location: glasgow
Posts: 880
Likes: 0
Received 0 Likes
on
0 Posts
Oh no, my car doesnt even have an MOT at the moment due it being sorned since the start of the year, would you know if its possible to just remove the caliper from the hub, even if the bracket is still attached I could atleast get it helicoiled?
Thanks
Thanks
#4
Scooby Regular
iTrader: (5)
Not uncommon, I'm afraid.
I managed to drill out the remains from the caliper and got away without too much damage to the thread. I ran a tap through to clean up the thread and used a new bolt. I used a turn or two of PTFE tape on the new bolt and all's been fine for a few years!
JohnD
I managed to drill out the remains from the caliper and got away without too much damage to the thread. I ran a tap through to clean up the thread and used a new bolt. I used a turn or two of PTFE tape on the new bolt and all's been fine for a few years!
JohnD
#7
Scooby Regular
Thread Starter
iTrader: (3)
Join Date: Sep 2013
Location: glasgow
Posts: 880
Likes: 0
Received 0 Likes
on
0 Posts
Thankyou for that bit of advice, just had a quick look on Wikipedia, seems to state a drill bit 90% of the size of the bolt is ideal, is that the case?
https://en.wikipedia.org/wiki/List_o..._and_tap_sizes
https://en.wikipedia.org/wiki/List_o..._and_tap_sizes
Trending Topics
#9
THE braking specialist
iTrader: (259)
Take the thread pitch away from the bolt diameter and that's what size drill bit you need so on the front Brembo's they have an M12 x 1.5mm pitch so you need a 10.5mm drill bit , the rears are M10 x 1.5mm so you would need an 8.5mm drill bit.
We are set up to machine these , we charge £30 to fix a thread, if more are needed we could do a better deal fixing them , don't use an easy out at this stage as these snap while trying to get the old bolt out it makes it a lot harder
We are set up to machine these , we charge £30 to fix a thread, if more are needed we could do a better deal fixing them , don't use an easy out at this stage as these snap while trying to get the old bolt out it makes it a lot harder
#10
Scooby Regular
iTrader: (2)
Join Date: Oct 2012
Location: UK
Posts: 676
Likes: 0
Received 0 Likes
on
0 Posts
If you have the know how, Helicoil Thread Repair Kit £15-£20 and you will have spares left should it happen again. I did mine a year ago as 3 of them snapped.
Or, any decent garage near you will be able to do this, if not, send them off, I couldn't really wait and leave my car without brakes, which is why I did them my self.
Or, any decent garage near you will be able to do this, if not, send them off, I couldn't really wait and leave my car without brakes, which is why I did them my self.
#11
Scooby Regular
Thread Starter
iTrader: (3)
Join Date: Sep 2013
Location: glasgow
Posts: 880
Likes: 0
Received 0 Likes
on
0 Posts
I have been using HSS drill bits for the past few days, and have only managed to drill about 2mm into the nut, Ive had to split the caliper in half, would a carbide burr make faster progress.
Also I only have a hammer drill, should I use something else?
Thanks guys
Also I only have a hammer drill, should I use something else?
Thanks guys
#12
Oh god, some people should not be letloosewith tools....
A hammer drillnd a HSS drill bit is why you haven't finished it yetthose bits will be mullered! You need a professional!
A hammer drillnd a HSS drill bit is why you haven't finished it yetthose bits will be mullered! You need a professional!
#13
Scooby Regular
Thread Starter
iTrader: (3)
Join Date: Sep 2013
Location: glasgow
Posts: 880
Likes: 0
Received 0 Likes
on
0 Posts
Glad I gave you the oppurtunity to post idiotic remarks, doubt a professional would come round and do it on the drive, this is why I'm having to do it myself.
Why bother to reply with a condescending attitude?
Maybe you shouldnt be let loose with a keyboard, it is a forum where people ask questions to gain knowledge after all.
Why bother to reply with a condescending attitude?
Maybe you shouldnt be let loose with a keyboard, it is a forum where people ask questions to gain knowledge after all.
#14
Scooby Regular
Thread Starter
iTrader: (3)
Join Date: Sep 2013
Location: glasgow
Posts: 880
Likes: 0
Received 0 Likes
on
0 Posts
Oh and by the way, the hammer drill has two settings, one for hammer one for normal
I asked about the hammer in case there was a better drill fo the job.
But if you're all knowing why dont you reply with something helpful instead of acting like a brat?
I asked about the hammer in case there was a better drill fo the job.
But if you're all knowing why dont you reply with something helpful instead of acting like a brat?
Last edited by just me; 11 October 2015 at 09:08 PM.
#15
Scooby Newbie
iTrader: (1)
Join Date: Sep 2015
Location: Cheshire
Posts: 11
Likes: 0
Received 0 Likes
on
0 Posts
Get some big brand cobalt tipped drill bits and some cutting fluid, use a low speed drill if possible. The cobalt drill bits usually just eat through bolts.
If you only have a high speed drill then use it in bursts, try not to let the bit and bolt get too hot, stop drilling and use the cutting oil to cool it down if it starts smoking. Try to make sure the drill is lined up straight with the bolt, if it's not then there is more chance of damaging the thread. Take your time with it and good luck.
If you only have a high speed drill then use it in bursts, try not to let the bit and bolt get too hot, stop drilling and use the cutting oil to cool it down if it starts smoking. Try to make sure the drill is lined up straight with the bolt, if it's not then there is more chance of damaging the thread. Take your time with it and good luck.
#16
Scooby Regular
Join Date: Jun 2012
Location: Hampshire
Posts: 120
Likes: 0
Received 0 Likes
on
0 Posts
sound advice, try to ensure you are central when drilling. Depending on in you have any thread exposed, you could try cut a slit in it and use a screw driver to turn it out. It depends how corroded it is though. The key is patience with this. Good luck!
#17
Scooby Regular
iTrader: (4)
Join Date: Feb 2006
Location: Whats it Called?
Posts: 511
Likes: 0
Received 0 Likes
on
0 Posts
happened to me to mate, helicoil was the solution.
can you not take it to an engineer / blacksmith place and get them to drill out the bolt, they will do it with ease, save a lot of hassle.
can you not take it to an engineer / blacksmith place and get them to drill out the bolt, they will do it with ease, save a lot of hassle.
#18
Scooby Regular
Thread Starter
iTrader: (3)
Join Date: Sep 2013
Location: glasgow
Posts: 880
Likes: 0
Received 0 Likes
on
0 Posts
Get some big brand cobalt tipped drill bits and some cutting fluid, use a low speed drill if possible. The cobalt drill bits usually just eat through bolts.
If you only have a high speed drill then use it in bursts, try not to let the bit and bolt get too hot, stop drilling and use the cutting oil to cool it down if it starts smoking. Try to make sure the drill is lined up straight with the bolt, if it's not then there is more chance of damaging the thread. Take your time with it and good luck.
If you only have a high speed drill then use it in bursts, try not to let the bit and bolt get too hot, stop drilling and use the cutting oil to cool it down if it starts smoking. Try to make sure the drill is lined up straight with the bolt, if it's not then there is more chance of damaging the thread. Take your time with it and good luck.
#23
Scooby Regular
Join Date: Oct 2011
Location: SE Wales
Posts: 207
Likes: 0
Received 0 Likes
on
0 Posts
I wouldn't, mine came back cross threaded! You don't need Helicoil, they are an most expensive kits. Now that you've done the difficult bit, drilling it, drilling it just a bit bigger and fitting a thread repair from a kit should be fine.
#25
THE braking specialist
iTrader: (259)
If we machine them to fit a helicoil it will come back to you perfect and ready to fit , it would certainly not come back with the threads still damaged .
The process you're trying to explain , is fitting a helicoil , you drill it out larger , tap a new thread into the new hole , insert a thread insert which takes it back down to the original thread size.
If you know what you're doing , and we do , its pretty impossible to get it wrong
Cheers Ian
#26
I used Godspeed brakes to refurb my old Brembo Calipers, they had 2x stripped threads and chipped paint work, came back looking brand new with no hassle. I would just go back to them if it ever happened again.
Thread
Thread Starter
Forum
Replies
Last Post
Mattybr5@MB Developments
Full Cars Breaking For Spares
28
28 December 2015 11:07 PM
Mattybr5@MB Developments
Full Cars Breaking For Spares
12
18 November 2015 07:03 AM