Ducati Sporting Club UK > Model Specific - Discussion, Technical Problems and Help > 998 / 996 / 916 / 748 > Thread Inserts

[aka.eric]

Removing a disc mounting bolt,its removed the thread with it.Is the answer a Helicoil,are they easy to do.Looks like the mounting holes have threaded inserts as original rather than the casting being tapped,dont suppose a new insert will screw straight in.Any advice please.

[dukess1999]

Don't know how easy it is to do, but it cost me around £20 to have a radial master cylinder helicoiled by a local hydraulic engineering company, so I'd guess it'd be even cheaper for a wheel.

[rcgbob44]

Its very easy to do yourself AKA, you can get a full kit or just a kit in the thread size you actually need.

Where are you, someone might be able to help you out.

[Monty]

If you are anywhere near Towcester Paul James could do this for you.
Otherwise any decent bike shop with a workshop should have the gear-St.Neots Motorcycles have done some for me in the past, and Paul sorted the clutch centre on my TZ.

John

[Rob B]

Yup, doddle. Got M5 and M6 kits myself if you're anywhere close.

Rgds, Rob

[Glyn]

what is the difference between a helicoil and justv re tapping a thread??

[rockhopper]

My guess is that helicoiling will allow you to use the original sized bolt, re tapping will need a larger bolt unless the thread is only slight damaged and a tap of the right size will restore it.

[Rushjob]

Glyn asked......... what is the difference between a helicoil and just re tapping a thread??

Re-tapping cuts into the existing metal... if the thread has stripped out then there is nothing left for the item bolted in to locate to.
A helicoil is a threaded insert... think along the lines of drilling out to the next drill size & inserting a new bit of metal with a thread on it which matches the original hole......

[aka.eric]

Thanks for the offers.Picked a helicoil kit up,job done in no time,brilliant tool.

[marko]

As I understand it ( I'm sure some one will tell me if I'm wrong) Thread inserts ie Helicoils were developed for RollsRoyce in WW2 so they could strip Merlin engines time and time again.
A helicoil is made of hardend coil wound steel and can be used to restore a tapped hole to it former self.when you buy a kit you get a tap and thread inserts.
The down side to them is they can come out and will