Author Topic: Parts and repair  (Read 216 times)

Offline Philly73rhodes78

  • Pre-Piano
  • *
  • Posts: 2
    • View Profile
Parts and repair
« on: August 21, 2020, 06:40:03 PM »
Anyone know the screw size of the screws that hold the harp in the the Mark I?  I know its a regular screw. VV charges a buck a piece, not to mention the high cost of S/H.  If I found out i will go to Home Depot and pay a buck for a box of 50.

Offline ummagumma

  • Fiesta Red
  • **
  • Posts: 32
    • View Profile
Re: Parts and repair
« Reply #1 on: August 22, 2020, 07:25:01 AM »

 yeah my MK1A just has regular Robertson headed woodscrews. But they are probably not original


Offline sean

  • Mark II
  • *****
  • Posts: 897
    • View Profile
Re: Parts and repair... Harp Mounting Screws.
« Reply #2 on: August 23, 2020, 12:34:21 AM »

If you have an early Mark I piano with wooden harp supports, the harp is held down with screws similar to modern sheet metal screws.  I would buy Round Head Phillips #12 sheet metal screws, 1" long.

Zinc plated https://www.homedepot.com/p/Everbilt-12-x-1-in-Phillips-Pan-Head-Zinc-Plated-Sheet-Metal-Screw-6-Pack-806601/204275210

Stainless https://www.homedepot.com/p/Everbilt-12-x-1-in-Phillips-Pan-Head-Stainless-Steel-Sheet-Metal-Screw-2-Pack-801191/204275403

or here is your box of fifty:  https://www.mcmaster.com/92470A296/

===========================

If you have a Mark I piano with aluminum harp supports, the screw used is a plain steel pan-head phillips screw with #12-24 threads, length 0.850" - a 3/4" or 1" length will work fine, but 1.250" screw will bottom out on the aluminum extrusion.  The original screws were self-tapping, but you don't need to cut new threads, so just get a plain screw.  The original screws are not stainless steel.

https://www.mcmaster.com/91772A397/

Sean
« Last Edit: August 23, 2020, 12:36:04 AM by sean »

Offline pianotuner steveo

  • MIDI Mark V
  • *****
  • Posts: 3471
  • A keyboard player in love with vintage guitars!!!
    • View Profile
Re: Parts and repair
« Reply #3 on: August 23, 2020, 06:13:52 AM »
The price of screws has gone way up the last couple of years. You may get a few for a buck these days, but not a box full. Do you have any least 1 that you can bring to a store to match up?
« Last Edit: August 23, 2020, 06:15:50 AM by pianotuner steveo »
1960 Wurlitzer model 700 EP
1968 Gibson G101 Combo organ
1975 Rhodes Piano Bass
1979 Wurlitzer 206A EP
1980 Wurlitzer 270 Butterfly Grand
2004 Hammond XK3
2009 73A Rhodes Mark 7
2009 Korg SV-1 73
2017 Yamaha P255
2020 Kawai CA99
....and a few guitars...