Hammer Set for Upright/Vertical Piano Pre-Bored

Description

Full set of upright/vertical piano hammers. Dimensions and critical measurements are as follows: Hammer width - bass: 9.5mm (0.375"); treble - 10.3mm (0.408") Bore distance (tip of felt to center of hole for shank) - bass: 55mm (just over 2 1/8"); treble: 63.5mm (just under 2 1/2") Bore angle* - bass: 15 degrees throughout bass section; tenor (middle section): varies from 12 degrees in the low part of the tenor section gradually to 2 degrees in the upper part of the tenor section; treble - 0 degrees throughout. Rake angle* - 4 degrees Quantity in each section - Bass: total of 30, numbered 1 through 28 with two extras numbered 0; tenor: 30 (numbered 29 through 58); treble: 33 (numbered 59 through 91). The extra hammers low and high give a bit of flexibility for pianos with differing numbers of notes in sections. *Note about bore and rake angle. These hammers have a shank hole bored to about 0.234" which is somewhat oversize for the 7/32" diameter shanks (0.218"). This is intentional and done to provide "wiggle room" when gluing the hammers to the shanks and allows you to "dial in" the angle best suited for your application.