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Join Date: Sep 2005
Location: So. Cal.
Posts: 11,239
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What is it? Tool question...
We found a box of these (along with other "things") in our mechanic's shop. The shaft at the top spins inside the threaded outer (black) barrel. There is what looks like a brand new router bit recessed inside the barrel, held in by spring force. The bottom "foot" is made of nylon.
   
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David 1972 911T/S MFI Survivor |
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03-31-2011, 08:38 AM
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Get off my lawn!
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:It's a fritzler bearing cutter!
 It's all about the ball bearing these days.
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Glen 49 Year member of the Porsche Club of America 1985 911 Carrera; 2017 Macan 1986 El Camino with Fuel Injected 350 Crate Engine My Motto: I will never be too old to have a happy childhood! |
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03-31-2011, 08:44 AM
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Double Trouble
Join Date: Nov 2002
Location: North of Pittsburgh
Posts: 11,705
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Looks like a countersink.
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03-31-2011, 08:47 AM
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Location: Long Beach CA, the sewer by the sea.
Posts: 37,661
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Cuts recesses for flush rivets. Kind of a metal workers version of a countersink bit. I have one.
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03-31-2011, 08:47 AM
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Is that like a muffler bearing???
 As for the countersink, why wouldn't there be a point on the bit?
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David 1972 911T/S MFI Survivor |
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03-31-2011, 08:48 AM
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Wow - there must be some big heads on those rivets, as the bit is an inch in diameter!
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David 1972 911T/S MFI Survivor |
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03-31-2011, 09:00 AM
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Location: Long Beach CA, the sewer by the sea.
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Yes, you can adjust the depth on that tool. |
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03-31-2011, 09:05 AM
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Targa, Panamera Turbo
Join Date: Aug 2004
Location: Houston TX
Posts: 22,366
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I used one of those once...she wasn't into it...
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03-31-2011, 09:09 AM
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David 1972 911T/S MFI Survivor |
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03-31-2011, 09:23 AM
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Location: Long Beach CA, the sewer by the sea.
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Quote:
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03-31-2011, 09:36 AM
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Senior Advisor
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It's for cutting sheet metal for counter sunk rivets on aircraft or anything else you want. Should also have a thingey that looks like that but has a flush/flat cutter to trim the rivet heads off flush. Want to sell it?
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08 Cayenne Turbo |
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03-31-2011, 09:40 AM
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MAGA
Join Date: May 2004
Posts: 10,768
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Yep I have several of those in different sizes along with several sizes of cutter chamfer bits. The pilot is sized to fit perfectly in a hole drilled to fit aircraft rivets. They are adjustable to allow a perfect depth of chamfer so that the flush aircraft rivets once set will be flush with the skin. You hold the outer section so that it does not mar the aluminum while the bit inside spins. The section you hold on to sits squarely on the material you are chamfering thus it keeps the chamfer square to the hole.
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German autos: '79 911 SC, '87 951, '03 330i, '08 Cayenne, '13 Cayenne 0% Liberal Men do not quit playing because they get old.... They get old because they quit playing. |
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03-31-2011, 10:25 AM
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Almost Banned Once
Join Date: Feb 2009
Location: Adelaide South Australia
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Like in the movie "The Aviator" when Howard Hughes wanted all of the rivets flush???
 Cool looking tool. If you've ever tried countersinking a hole in aluminum you'll appreciate this tool. Is there a makers mark on it? I bet it's US made.
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- Peter |
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03-31-2011, 11:55 AM
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abit off center
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I thought they dimpled aircraft alum for flush rivets not cut the alum?
......but then I built a wood airplane...what do I know about this fancy pants metal stuff.....
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______________________ Craig G2Performance Twinplug, head work, case savers, rockers arms, etc. |
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03-31-2011, 12:00 PM
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Location: So. Cal.
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Yes - it's made by Zephyr Manufacturing in Inglewood, CA. A quick Google search indicates they make aircraft tools, so all the above makes sense!
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David 1972 911T/S MFI Survivor |
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03-31-2011, 12:26 PM
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Location: Charleston, SC
Posts: 2,357
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Sounds like the person who owned the toolbox worked in Long Beach a while back.
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'87 924S (Sold) |
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03-31-2011, 01:10 PM
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Location: So. Cal.
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Apparently the prior principles here were known to buy up a guy's tools if he was exiting business.
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David 1972 911T/S MFI Survivor |
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03-31-2011, 01:29 PM
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Quote:
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03-31-2011, 02:51 PM
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Registered
Join Date: Feb 2007
Location: Stafford, VA
Posts: 95
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That is a countersink with a microstop.
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03-31-2011, 04:22 PM
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Carrera
1969 and 1986 Porsche Targa and Coupe 1720cc and 3
1986 Porsche 944
1952 Caterpillar D2
GamaGoat
2000 Chevrolet Corvette
