Alan, Thanks a lot for your information. I hope it all will work well. Peter -----Oorspronkelijk bericht----- Van: Alan W Deverell <aland@casa.co.nz> Aan: pianotech@ptg.org <pianotech@ptg.org> Datum: vrijdag 21 augustus 1998 1:37 Onderwerp: RE: Plate - Grinding >Although I have never had to remove as much as 25mm (1"), my work on >Older Cast Iron Plates has all been done with the aid of the following >equipment: > >1) Tool Makers Die Grinders (electric or pneumatic) fitted with >appropriate "Mounted Points" up to 1" diameter and shaped, using >"dressing tools" to suit the "re-fettling" job. >2) Angle Grinders (electric or pneumatic) fitted with appropriate grit >disks and sanding pads. >3) Sanding "bobs" (mounted in electric or pneumatic drills) to level >some of the surface markings. >4) Hand sanding using cloth backed "emmery paper" strips. > >Any good engineering supply shop should be able to advise you in the >selection of all the gear. > >I recommend that you practice the skills on something unimportant >before you begin in earnest and that you ensure that the 25mm you wish >to remove is NOT going to compromise the structural integrity of the >plate. > >Warning - Cast Iron DUST, produced by these methods, is VERY invasive >and it is essential to wear appropriate breathing apparatus, safety >glasses and ear muffs etc. and to vacuums clean/sweep up afterwards. > >AlanD (who learned these basic skills, 25 years ago, porting and >polishing the cylinder heads of racing engines) > >>-----Original Message----- >>From: owner-pianotech@ptg.org >>[mailto:owner-pianotech@ptg.org]On Behalf >>Of Peter Kestens >>Sent: Friday, August 21, 1998 8:12 AM >>To: pianotech@ptg.org >>Subject: plate >> >> >>Hello, >> >>I'm "truying" to rebuild an old (ugly) german piano to a >>(less or more) >>decent one. Lets say I do it as an exercise. >>For this, I've rescaled the old stringscale but I've also to >>make a totally >>new bridge because the program (=Parsons) showed strings >>that are about 30 >>mm to long (and this means inharmonicity is very bad). I >>also have to remove >>some metal from the plate: the new bridge comes about where >>two screws now >>fasten the plate. There is place to make new screw-holes 25 >>mm higher but >>what is the most easy way to remove about 25 mm of metal >>without to much >>damaging the plate. The screw-holes are for the moment >>left and right >>from the treble bar from the plate. Thanks a lot for your help. >> >>Peter >> >>KESTENS.P@DEBCOM.BE >> >> >> >
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