This shows my techniques for piaon key top replacement.

1. Jigs for
Keytops
Duane McGuire
February 24, 2011

2. First:
Let's talk about safety!
If it doesn't look safe to you, it's not safe for you.
If you don't know what can go wrong. Stop. Think. Ask.
Focus and attention: Where are your fingers? Where is the blade?
As you gain experience, maintain awareness.

3. NNicicee loloookkiningg kkeeyyss,, hhuuhh??

4. Glass Bead
Blast Booth

7. AAfftteerr bbeeaadd bblalassttiningg

8. BBeeffoorree AAfftteerr

9. Ivory Removal

10. Keytop
Planing

11. Result:
Uniform depth of cut
Square edge at back
of cut

12. The concept – drill press rotary cutter presented
by Bill Spurlock PTJ March 1991

13. Duane's working diagram

15. Measuring Ivory Thickness
0.9 mm

16. Plastic Keytop: 2.4mm
We're planing the key down 1.5 mm

17. Jig Details

23. Key
Front
Preparation

27. Then a Miracle Occurs:
New key tops are glued
to the resurfaced keys.

28. Flush Trimming Setup

33. End Product