Hoffman Amplifiers Tube Amplifier Forum

Other Stuff => Cabinets-Speakers => Topic started by: Jennings on October 12, 2011, 05:22:50 am

Title: Best way of getting a cab apart when the screws are rusted and gouged?
Post by: Jennings on October 12, 2011, 05:22:50 am

I'm trying to get a 70s Marshall Artiste 2x12" combo cab apart for rebuilding.  basically the cab's sound, but the baffle's shot to bits where the speakers should mount.  It needs a new baffle, but I need to get the old one off to measure and replace it.  Problem is the cab arrived with half the screw heads reamed out and rusty so I can't get a grip with my screwdriver!  Anyone got any good advice on getting the baffle off when it's like this?!  I can't imagine drilling them, as I'll never get the cab under my bench pillar drill and hold it steady!  All I can think to do is hit the baffle from inside the cab with a mallet, close to where each knackered screw is, until it tears/pushes the baffle off the old screw shaft. 

Title: Re: Best way of getting a cab apart when the screws are rusted and gouged?
Post by: sluckey on October 12, 2011, 08:26:22 am

Try a "screw extractor". Works in a portable drillmotor in reverse slow speed. Lowes has a couple different styles. Be patient. I'd save the mallet idea for the very last resort. Using a mallet will likely tear up something besides the baffle board.

Title: Re: Best way of getting a cab apart when the screws are rusted and gouged?
Post by: Jennings on October 12, 2011, 02:42:19 pm

Wow!  I never knew these existed!!!  Thanks...I'll get hold of a set ASAP and get to work!

Title: Re: Best way of getting a cab apart when the screws are rusted and gouged?
Post by: G._Hoffman on October 14, 2011, 03:32:23 pm

If that doesn't work, you can get one of THESE (http://woodworker.com/14-screw-extractor-mssu-118-323.asp?search=screw%20extractor&searchmode=2).  But if you can make the back out extractor work, you only need to get it out far enough to grab it with a vice grip pliers, which will get you the rest of the way. so those are preferable if they will work.


Gabriel

Title: Re: Best way of getting a cab apart when the screws are rusted and gouged?
Post by: shortfuse on October 15, 2011, 12:36:48 pm

Gabriel
Thats a cool tool.  I was an automotive machinist for a long time and never really got into the wood stuff that much besides rough carpentry.  I have 2 jobs I could use these on right now.

Title: Re: Best way of getting a cab apart when the screws are rusted and gouged?
Post by: Jennings on October 16, 2011, 06:50:23 am

Wow!  Thanks for the tips...I managed to get a couple of the scres out, and the rest just kind of crumbled or snapped at the head making it easier to push the baffle off...so it's finally off!  Think next time (if there is one!) I'll try one of those little bore tips there to burrow round the screw...the dowel fix idea seems very neat to me, and less general faff.  Cheers Gabriel :-)