just cant get a break it seems.

[DAPPH]

I've done the same with simillar tap wrenches made of the same cheese , Abosolute carp

I was going to make a steel one but waiting on some stock for the project

So why the butchering exercises guys ?
A tap wrench with the correct tap .......1st 2nd or bottoming tap should only ever be progressed 1/6 of a turn before backing it off to clear the lip of swarf whilst lubricating the thread hole being tapped . You don't need mole wrenches to tighten the wrench just finger tight will do .

IIRC The only time I've ever broken a tap let alone the wrench was in tapping a 3 mm metric in brass bar held in the lathe chuck with tap in the tailstock chuck for true mess alignment , tailstock was hand free sliding & well lubed , lubed the tap with WD 40 working ever so gentle doing the sixth rule , five threads or so deep " Squeak " back out ...snap ! Had to turn about 3 mm back so the thread was still covered in a thin wall of brass then use pliers to hold it whilst I backed off the lathe by hand . Then re do the hole to the right depth .

I've got an interesting home made tap /auger wrench that a pal gave me many years ago ....I'll pop up a picture later on .

 

[bricol]

So why the butchering exercises guys ?
A tap wrench with the correct tap .......1st 2nd or bottoming tap should only ever be progressed 1/6 of a turn before backing it off to clear the lip of swarf whilst lubricating the thread hole being tapped . You don't need mole wrenches to tighten the wrench just finger tight will do .

IIRC The only time I've ever broken a tap let alone the wrench was in tapping a 3 mm metric in brass bar held in the lathe chuck with tap in the tailstock chuck for true mess alignment , tailstock was hand free sliding & well lubed , lubed the tap with WD 40 working ever so gentle doing the sixth rule , five threads or so deep " Squeak " back out ...snap ! Had to turn about 3 mm back so the thread was still covered in a thin wall of brass then use pliers to hold it whilst I backed off the lathe by hand . Then re do the hole to the right depth .

I've got an interesting home made tap /auger wrench that a pal gave me many years ago ....I'll pop up a picture later on .

1/6 of a turn! Crikey.

I was taught one to two turns - I've seen up to three turns in some instructions. 1/6 of a turn isn't allowing it bite into the material much! If course, "feel" helps - you back it off to break the chip if you feel it tightening, but machine/spiral taps can simply be wound in. Worst thing to cause breakage is mis-alignment.

 

[premmington]

It was. And I took your advice

Should be here next week. They’ll be handy actually. For years I’ve been trying to find a long tap holder but the ‘chuck’ type are too fat for a lot of access

+1

 

[premmington]

1/6 of a turn! Crikey.

I was taught one to two turns - I've seen up to three turns in some instructions. 1/6 of a turn isn't allowing it bite into the material much! If course, "feel" helps - you back it off to break the chip if you feel it tightening, but machine/spiral taps can simply be wound in. Worst thing to cause breakage is mis-alignment.

I put small taps into new stuff sometimes using a battery drill (battery drills have a clutch).

It is repair work I struggle with broken taps - mis aligned holes - debris - access.

I did once buy a set of tap extractors - three and four flute things - hopeless.

I just TIG onto broken taps now - to remove them.

 

[Melvyn Best]

I also use a cordless to clean threads ,usually for cylinder head bolts , a bit of lube then blow them out with an air line .

 

[ajlelectronics]

Can't get a break? Join the club!

Yesterday I got my V5 which had arrived unexpectedly quickly. Aha, I can get it on the Historic register and tax it so that it can be used over the weekend. I checked the main Post Office opening and saw that they were open until 17:30, so I got all the paperwork together and off I went. I had to park on the outskirts and walk in due to a show taking place.
After running the gauntlet of some wannabe (c)rap star playing his antisocial noise at high levels, I got to the Post Office. Closed due to Marxist action. Brilliant, so I have to come all the way back and then I wasted the rest of the day.

Today, I did a bit of CAD and then decided to do something useful on my project at work. Before I could go, I needed to open the house blinds and in doing so, found a puddle left by a resident critter, the hard way.
I got all the way to work and then found that I had left my keys at home.

I'm not in the best of moods.

 

[T0rnado69]

i measured the cheese holder and its 30mm wide. but 12mm thick. so that 30x20 stock would be a bit extreme to use.
to make a new centre bit with.

anyway i found a couple bits of tube. had to open one up slightly one end, to go over the locking ring on the tap holder.
need to cut other to same length, but it did the trick and i got all four now tapped.

Can't get a break? Join the club!

I got all the way to work and then found that I had left my keys at home.

I'm not in the best of moods.

i remember that time, i took the kids to school, had to walk them as car was off the road.
wasn't far though. about 1/3 mile ild say. anyways got them to school and walked back home.
only to find my keys wasn't in my pocket.... i had left them in doors

 

[daleyd]

I put small taps into new stuff sometimes using a battery drill (battery drills have a clutch).

It is repair work I struggle with broken taps - mis aligned holes - debris - access.

I did once buy a set of tap extractors - three and four flute things - hopeless.

I just TIG onto broken taps now - to remove them.

Spiral flute or spiral point ones are no prob in a drill - spiral point force the swarf forward and spiral flute send it backwards - it’s easy to snag up traditional type taps though. I think it was always taught 1/2 turn in with traditional taps then back them out a turn to break the swarf? I usually go until you feel it tighten though

 

[slim_boy_fat]

I looked out the handle made by my Dad maaaany years ago, he must have been working with a load of sticky-fingered workmates as he'd stamped his name on it.....

 

[T0rnado69]

hehe slim. nice looking holder.

 

[T0rnado69]

well just to finish of this thread.
got all four threaded ends welded in.
and the four swivel wheels fitted.
and put all three bits together..

haven't been able to get under here for a while.. nice feeling to be getting somewhere.

now i can just roll this over to get the comp back under there once its all back together which is the next job now.


i also contacted draper about the tap holder in the tap and die kit.
that ive hardly use it and its the first time i have on the M12 tap.
found the receipt for the kit. wow didn't release it was 2007,
but out of gesture of good will they sent me this.

doesn't fit in the case though. too long but ohh well it will do for small stuff...