Air Hammer

[jolly roger]

Hi Terry,
               I use 75 PSI for driving almost down, then reduce the
pressure down to 45-50 PSI to slowly lower the pin the last tad.
This i do, last thing to get them all even.  Once you get to know your air
thingee, it works like a charm.
An over head air hose support is another thing to think of, saves the hose
from brushing the case work,  and cuts down on the drag on the gun.
If all your coil beckets are at 3 o"clock,  ( we will allow + or - 2mins
<G> at A440 ) all strings will be the same height from the plate, and the
tops of the pins will be even.
glad to hear you are happy camper.
Roger


At 05:47 PM 5/1/01 -0400, you wrote:
>Just tried out my Danair Palm Nailer #RN-16-8 for the first time driving
>three tuning pins into a pinblock. Holy cow cookies! That thing is slicker
>than you-know-what!
>
>Often as I drove a tuning pin by hand (with manual hammer) into a bare
>pinblock, I could see the damage I did to the top of the hole as the pin
>wiggled back and forth with each blow (hey, I'm a newbie!). I'm sure it
>continued throughout the driving process. The couple pianos I have restrung,
>resulted in acceptable (for me - I had low expectations), but far from
>perfectly uniform tuning pin torque.
>
>The three pins I drove into a bare pinblock resulted in 160 in-lbs. torque
>for each one. Not 150, not 170, but all three were like exactly 160 in-lbs.
>of torque. I had never done that before. Oh, boy, this has made my day. I
>can hardly wait until after I finish restringing and start chipping/tuning.
>Clearly, I am expecting fabulous results.
>
>Thank you Del Fandrich and Roger Jolly (and anyone else that participated in
>that thread - I know there were a few) - I recall that both of you use an
>air powered hammer, and one of you recommended the Danair specifically. Man,
>you just drive those puppies straight down. I am just absolutely amazed at
>what a difference it makes! Fast, easy, and NO tuning pin wiggling.
>
>What do you use as a guide for tuning pin driving depth control? On my bare
>test holes, I used an one-inch-thick piece of hard maple with a 5/16-inch
>hole drilled in it. I placed the maple guide over the tuning pin hole,
>inserted the tuning pin, and drove it with the Palm Nailer until it would go
>no further. That worked perfect - for a bare block. Now I need to figure out
>what to use when I am driving the pin through the plate into the block. What
>does anyone use? Something hard to physically stop the Palm Nailer from
>going any further - or do you tape a stick or something to the thingee that
>goes over the top of the tuning pin and just watch until it touches the
>plate or whatever?
>
>Can we adapt this thing for bridge pins - or just way too much horsepower?
>
>Terry Farrell
>Piano Tuning & Service
>Tampa, Florida
>mfarrel2@tampabay.rr.com
>