Which hammer/socket for old square taper tuning pins?

[mzee]

(Apologies if this gets posted twice. First attempt seemed to vanish into thin air)

Can anyone advise what hammer/socket I need for tuning j.b. cramer upright (s/n circa 27,000)?

Tuning pin spec:-
Profile: square
Projection: 14mm (beyond string)
Taper: 5.0mm to 6.0mm in 14mm

Should any mid-range square hole hammer/socket work or do I need to be more precise (= expensive) when buying a tool?

[Barrie Heaton]

Welcome to the forum

if it is a virgin piano and has 00 pins then a small star head will do or a P leaver
See Here 498E

As you are new to the forum your post have to be approved by the moderators that why they did not show at first
Barrie

[mzee]

Thanks for the welcome and pointers.

I've emailed F & N to find out the dimmensions of their small star.

P.S. What are '00' pins? Is/was that a standard size? I cant find any mention on internet.

[Barrie Heaton]

Tuning pin sizes

6.75 mm 1
6.90 mm 1/0
7.00 mm
7.10 mm 2/0
7.20 mm
7.25 mm 3/0
7.37 mm
7.50 mm 4/0
7.75 mm 5/0

The above is what we use today but we use to use 0/0

Barrie

[vernon]

Barrie
I've learned something today!

[Barrie Heaton]

There is 6/0 as well but they are awful to tune with Then you have the different lengths as well

When i first started restring I was told

if 0/0 put in 2/0
if 1/0 out in 3/0
if 2/0 put in 4/0
if 3/0 put in a new plank

And always chalk the new pins

Barrie