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Author Topic: Aperture plate filing Louis Bornwasser Film God Posts: 4441 From: prospect ky usa Registered: Mar 2005 posted 04-17-2005 08:42 PM                        The files I use are the ones sold by LaVezzi and available from any dealer.  |  IP: Logged Monte L Fullmer Film God Posts: 8367 From: Nampa, Idaho, USA Registered: Nov 2004 posted 04-18-2005 04:03 AM                     I have a set of X-acto modeling files and a straight, smoothed edge file. Just would like to find some aperture stones to complete my set. Nice thing about brass: it can be hammered back to fill in the accidental "overcutting" of aperture plates. One theatre had overcut apertures and I hammered that brass towards the inside to be refiled. Took a while, but got it. Or, one could bronze in a piece of brass with a torch for recutting....seen that done before as well. Yea P35 aperture plates close to 70 bucks.. -thx Monte  |  IP: Logged John Hawkinson Film God Posts: 2273 From: Cambridge, MA, USA Registered: Feb 2002 posted 04-18-2005 09:28 PM                     aperture stones? Do you mean something other than standard polishing stones, like the diemaker's stones midway down page 2493 of the McMaster-Carr catalog? Also, remember if you have a needle file that isn't safe, you can grind down an edge with a shop grinder, and there you go. --jhawk  |  IP: Logged Will Kutler Phenomenal Film Handler Posts: 1506 From: Tucson, AZ, USA Registered: Feb 2001 posted 04-18-2005 11:16 PM                     India stones are what is being referred to. But a Brillo pad or fine wet and dry sand paper are all you should need to remove burrs. And ya, burrs, especially on brass is something to look out for. Which reminds me that at my old theatre, which had (and still has) horrendous plates, there was one that looked like a small hair appearing on the screen. Needless to say that it was an unremoved burr that I did manage to cut my finger on ! And yes, Christie plates are on the expensive side. CNC machined out of a few dollar piece of brass. My estimate is that it should noty take maybe 2 minutes to completely machine the part, including loading-unloading time. But cost is also determined from several factors including how many are needed per lot and how often, as well as all the associated machining costs. Cheers K.  |  IP: Logged Monte L Fullmer Film God Posts: 8367 From: Nampa, Idaho, USA Registered: Nov 2004 posted 04-19-2005 12:34 AM                     Aperture stones that I'm referring to is a block of abrasive material that is in the true square retangular form-so to fine tune the corners square in the aperture. The material is like of a grinding wheel, but only finer. Hey, J-hawk,- Thx and yes, it probably be of the same material and shape as shown in the catalog of the post that you presented. thx-Monte  |  IP: Logged Frank Angel Film God Posts: 5305 From: Brooklyn NY USA Registered: Dec 1999 posted 04-19-2005 05:07 AM                        Total black velvet masking covers up a lot of ills  |  IP: Logged

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