Inserting an M8 Helicoil into a P32F caliper-How?

[djsbriscoe]

Hi,
Now I have ordered a Brembo P32f rear caliper for my Skorpion I have to insert an M8 thread insert into each hole in the caliper.
I have never used a helicoil before but I am willing to give it a try as I am familiar with conventional taps and dies.
1/ What tools are required without buying a complete Helicoil kit as I don't need it nor can I afford it?
2/ What alternatives to Helicoil are available and what would people recommend?
3/ What is the pitch of the insert needed? Is it 1mm or 1.25mm pitch?
4/ Would I have to drill the holes out to a larger size before tapping? If so, what size drill would I use?

As I do not have a drill press, drilling the holes will be a problem.

I'm assuming that the rethread tools are different from normal Taps and that some special tools ar needed.

Can someone give a brief description of the procedure used. As the calipers will be having a new thread started as against being rethreaded does this make a difference to the method used?

Thanks,

David.

[breakwellmz]

I recall there being Helicoil specific taps for Helicoil inserts,together with a specific tool for insertion(and the correct tapping drill!).I assume it`s to stop joe bloggs attempting it himself!Probably cheaper(and safer!) to get an engineering shop to do it i`m afraid.

[Eric Frith]

Worry not David, using threaded inserts is a piece of cake, I use them all the time...............

First you need to find out what the thread pitch of the M8 screw that you are useing.

Get the appropriate inserts

Get the matching tap ( for that particular insert)

Make sure the hole is the right size for the tap ( size usualy on the side of the tap)

Tap the hole

Wind in the insert with the little tool that comes with the kit

Break of the winding tang...........Job done

I recently bought an M5 kit complete in a box etc for £15 so they aren't expensive.

Eric

[djsbriscoe]

Eric,
Where did you buy your kit from and was it an original Helicoil or a derivative?
I'm assuming I would have to drill the holes in the caliper to a larger diameter before tapping.
I'm coming to the conclusion that I had better get the job done for me as I don't have a drill press/vice. I could buy one from Machine Mart for about £60 but I could probably get the job done for less than that.

David.

[Eric Frith]

For the M5's I used a non Heli Coil product, but the results were identical...

I think this is the link for the same item that I bought

http://cgi.ebay.co.uk/Helicoil-Thread-R ... 286.c0.m14


Eric

[Eric Frith]

But if you are unsure, best to get it done professionally.

Eric