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Transfer punches are only intended to lightly mark the part and you should follow up with a centre punch.
I made some cheap M12x1.75 transfer punches when I made a chuck adaptor. I took three set screws and turned a 60° point on them and then milled two flats either side of the point, so I could screw them into place with some long nose pliers. Screw all three in, turn the chuck over and give it a tap. Three holes perfectly located.
Hunting American dentists since 2015.
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(08-31-2017, 07:46 AM)Mayhem Wrote: ......I took three set screws and turned a 60° point on them and then milled two flats either side of the point, so I could screw them into place with some long nose pliers. Screw all three in, turn the chuck over and give it a tap. Three holes perfectly located.
That is a danged ingenious idea ! If I don't remember it next time I need threaded transfer punches, I should hang up my calipers.
How about making them out of grade 8 fasteners ?
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The following 1 user Likes kwoodhands's post:
TomG (02-09-2018)
(08-30-2017, 02:46 PM)Alphonse Wrote: Thanks Randy, good idea.
I bought a set off Amazon a year or two ago. Chicrap - not the best to say the least. Got to be prepared to sharpen them from time to time.
If I need a harder punch your idea is now in my hip pocket. So thanks again.
I bought a set from HF 10 years ago. They stay hard, never had to grind the tips. I use them mostly to set a pair of spring calipers for turning. I set the calipers to the next largest size that I need ,then mic to exact size.
Inexpensive, I think I paid less than $25.00 for the set.
mike
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Highpower (04-24-2018), EdK (04-24-2018), arvidj (04-24-2018), SteveG (04-26-2018)
In the middle of a job with no transfer punch???
Find a drill that fits the hole drop it in and tap lightly now turn the drill 90° and tap again and you will have a neat little cross to show your center.
Brian.
