Tap snapped in hole

[doubleboost]

I was asked if I could "drill" this out


Top ground away revealing tap


Nice clean metal


Ready for a bit of file work & re tapping

 

[Welderpaul]

This Sundays video John?....

 

[doubleboost]

Yes these are grabbed frames
Amazing quality

 

[roofman]

Looking forward to monday night at 6pm with a cuppa already...Wonderfull stuff John

 

[Welderpaul]

Doesn't look like it was going to come out any other way. Ever used those 3 pronged tap extractor things?
You must be the North East's main man for sorting out everyones machining problems?

 

[DrNik]

I've migged a bolt on a broken tap before, it kept breaking off till I gave it some amps and then unscrewed it gently

 

[premmington]

Doesn't look like it was going to come out any other way. Ever used those 3 pronged tap extractor things?
You must be the North East's main man for sorting out everyones machining problems?

I have a set of three and four pronged tap extractors (Maker: Walton USA)

But to be honest, most taps I snap, I place a washer over the end of the broken tap and weld it to the washer with a 312 electrode then weld a nut to the washer-tap-312 weld! Then turn it out!

 

[ford34/2]

I have had success with them 3 pronged things, got a few sizes, if the tap has boken its generally cause it was tight in the hole, if its bottomed out, the three prongers dont like it, if its snapped in the hole cause you didnt keep the cut thread clean, the three prongers might well work. I`ve even used ground down masonry nails and a coller with 3 holes into keep them in place and then mole grips, good hard hit with a hammer and parallel punce to help loosen and a silent prayer. Like Johns approach- I know where to go now, Probably much faster, easier and a lot less frustrating.

John I need a couple of Ally welds-- You up for it? about 1" each

aye thats them--Waltons tap extracters, got a pile of spare finger inserts as well. or whatever you call them, mine are all 3 pronged

 

[doubleboost]

This one was over size & at a angle
If they had just left the broken stud I could have removed that

 

[roofman]

This one was over size & at a angle
If they had just left the broken stud I could have removed that

looks like a head off a early honda 4 pot John...possibly 400/4

 

[doubleboost]

looks like a head off a early honda 4 pot John...possibly 400/4

It is actually a Honda grass cutter engine

 

[roofman]

It is actually a Honda grass cutter engine

so i was close then

 

[doubleboost]

I have had success with them 3 pronged things, got a few sizes, if the tap has boken its generally cause it was tight in the hole, if its bottomed out, the three prongers dont like it, if its snapped in the hole cause you didnt keep the cut thread clean, the three prongers might well work. I`ve even used ground down masonry nails and a coller with 3 holes into keep them in place and then mole grips, good hard hit with a hammer and parallel punce to help loosen and a silent prayer. Like Johns approach- I know where to go now, Probably much faster, easier and a lot less frustrating.

John I need a couple of Ally welds-- You up for it? about 1" each

aye thats them--Waltons tap extracters, got a pile of spare finger inserts as well. or whatever you call them, mine are all 3 pronged

No problem with your welding be happy to help

 

[pedrobedro]

I've managed to fiddle them out with a pair of rusty old ground down snipe nose pliers that I keep for such things but if they are really well embedded they are a pig to shift.

 

[Benthosboy]

Back in my apprentice days, the electrician I worked with told me a good tale. in his previous job, working at Bone Cravens in Sheffield, (Staniforth Road if my memory serves me right), a 2" BSF tap snapped on an NC drill centre. Broken tap duly removed, programme restarted, and bang, another 2" tap bites the dust! Repeat the process and tap no. 3 goes west. Everyone extremely baffled until the tape was read, which revealed the problem. The "command" to retract the tap after it had bottomed was missing, so with the tap at full depth, the casting moved sideways.....

Ouch!!