Thread: Threaded Inserts

M11 is a pretty rare animal I may have one ile have a look in the morning if your still stuck

Originally Posted by 460cixy

M11 is a pretty rare animal I may have one ile have a look in the morning if your still stuck

Thanks but I am fine - the hole in the head is now M12.

Originally Posted by garrycol

In Canberra at the moment there are not even M12 1.5 taps available - neither of the two major tool shops had any - ended up using one out of an old cheap chinese set that I had. Also at the moment there are no M11 bolts to be had so the use of M11 tapes and dies is a bit academic.



Using a die to cut the 8mm thread on the new stud. My old set is not up to scratch in cutting HT steel but my neighbours set was slowing doing the job. If I use mild steel there shouldn't be any issues.

Canberra is really the pitts for anything related to cars and industrial tools and equipment - even worse this time of year as the place is closed - the one mobile repairer is off until mid January.

Thanks

Garry

I have 11 mm x 1.5 taps and dies in stock. all my taps and dies are high speed steel, machine shop quality. Also have four pitches in 12 mm.

The odd number nuts and bolts are pretty hard to find in this country in spite of them being in common use on Jap bikes and wog cars. I don't sell fasteners. Find a specialist.

Carbon steel taps and dies (or chrome tungsten steel, the marketers term for cheap crap t & d's) are only suitable for cutting new threads on mild steel or brass or for cleaning threads. Get HSS tools for tool and high tensile steels, stainless, heat treated aluminium alloys, titanium, plastics particularly those with abrasive filler.

I tried to get some mild steel M12 1.5 bolts today but no luck so I got a length of 9/16th threaded mild steel rod. We decided to make an insert rather than a M12/M8 stud.

We turned the rod down to 12mm and with some difficulty with the basic managed to thread it and then a drill and thread the hole.

I will see how it works tomorrow.

Garry

Well?

Originally Posted by garrycol

Where can you buy threaded inserts??

Today working on an engine I stripped the thread in an aluminium head in an inlet manifold stud. On pulling it out I found it had previously been damaged and repaired with a threaded insert.

I previously tried to get some threaded inserts about 12 months ago and all the nut an bolt shops as well as engineering supply shops I tried in and around Canberra only carried helicoils and in fact some shops did not even know what a threaded insert was.

On this head I have, because a threaded insert has been used, when I drill out the broken threads to tap in a new thread the hole will be much larger in diameter than the required stud making a helicoil not much use and the use of a threaded insert the way to go.

So as indicated any ideas where I might get these from.

Thanks

Garry

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