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Metalworking (rec.crafts.metalworking) Discuss various aspects of working with metal, such as machining, welding, metal joining, screwing, casting, hardening/tempering, blacksmithing/forging, spinning and hammer work, sheet metal work. |
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#1
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Drillscrew or drill screw for thick metal
I am looking for ways to attach components to the floor of a truck.
The floor could be as much as 1/4" thick plate with 1/2 inch or so thick mat and sound deadening material. I want to be able to use something like a drill screw or a threaded insert for two reasons. One is that I want the person to be able to work alone and the other is that many times it will be difficult to impossible for someone to get access to the other side of the floor area. I would like the head of the fastener have a positive grip such as a torx, hex head or square drive. Any ideas? |
#3
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One of the problems with drill screws is that the drill portion needs to
be drilling at a lower axial feed rate than the threads of the screw require. Can cause them to bind up and you twist them off or it strips the threads off. If that wasn't too clear, think of it this way. The thread of these fasteners is usually a fine thread, like 10-32, so for each rotation of the screw, once the threads are engaged, it will advance 1/32 inch. That a pretty healthy feed rate for a .150 dia drill (I think that's how big the drill was on the screws I have is.). If you can get the point of the drill portion through the metal, before the starter threads engage, you have a better chance. I have had luck by pilot drilling, but this wasn't real easy either. Make sure to use oil on the threads, and keep the vise grips close. wrote: I am looking for ways to attach components to the floor of a truck. The floor could be as much as 1/4" thick plate with 1/2 inch or so thick mat and sound deadening material. I want to be able to use something like a drill screw or a threaded insert for two reasons. One is that I want the person to be able to work alone and the other is that many times it will be difficult to impossible for someone to get access to the other side of the floor area. I would like the head of the fastener have a positive grip such as a torx, hex head or square drive. Any ideas? #! rnews 942 Xref: xyzzy news.admin.net-abuse.email:2510069 Newsgroups: news.admin.net-abuse.email Path: xyzzy!nntp From: "R. Scott" Subject: h0using.com mortgage spam flood. X-Nntp-Posting-Host: e131585.nw.nos.boeing.com Content-Type: text/plain; charset=us-ascii Message-ID: Sender: (Boeing NNTP News Access) Content-Transfer-Encoding: 7bit Organization: Im NOT!!! X-Accept-Language: en References: . com Mime-Version: 1.0 Date: Fri, 29 Apr 2005 19:58:09 GMT X-Mailer: Mozilla 4.79 [en]C-CCK-MCD Boeing Kit (Windows NT 5.0; U) All are apparently coming from Kornet. Spamcop is having trouble parsing the site names, so I'm not sure where the crap is being hosted at. Im getting them too, Its NOC.NET, otherwise known as Ostrich with head in the sand net. -- Rick Everett, Washington Remove THREAD to reply. |
#4
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wrote:
I am looking for ways to attach components to the floor of a truck. Riv-nuts, Truck-serts and I'm sure other brand names. Drill correct size hole, insert and set like a pop-rivet with a special tool then use a machine screw. See http://www.metalworking.com/dropbox/...es/thrdsrt.txt for an example. Ted |
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Ted Edwards wrote: wrote: I am looking for ways to attach components to the floor of a truck. Riv-nuts, Truck-serts and I'm sure other brand names. Drill correct size hole, insert and set like a pop-rivet with a special tool then use a machine screw. See http://www.metalworking.com/dropbox/...es/thrdsrt.txt for an example. Ted there's self drillers/tapers that will attach to 1/4" mild steel, no problem. http://www.haydonbolts.com/ should have something that will work. g/l |
#6
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Buy self drilling/tapping screws. They come in lots of sizes & heads,
although the kind I get most often have a hex head. They have a drill bit tip & a screw gun will drill right in & then they self tap. |
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#8
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Gary, It seems like these materials usually have nylon or plastic in them. I prefer to use a propane torch and a scratch awl to melt a non-raveling screw hole into the material. (top posted for your convenience) ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ Keep the whole world singing . . . . DanG (remove the sevens) "Gary Brady" wrote in message k.net... wrote: I am looking for ways to attach components to the floor of a truck. The floor could be as much as 1/4" thick plate with 1/2 inch or so thick mat and sound deadening material. I want to be able to use something like a drill screw or a threaded insert for two reasons. One is that I want the person to be able to work alone and the other is that many times it will be difficult to impossible for someone to get access to the other side of the floor area. I would like the head of the fastener have a positive grip such as a torx, hex head or square drive. Any ideas? If the sound deadening material or mat is made of fibrous material, like carpet, you may have a problem with the drill screw winding up the fibers or yarn. This occurs when you try to drill through carpet. You may have to cut the sound deadening material with a round punch before drilling. Gary Brady Austin, TX |
#9
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Having the floor insulating material wrap around the fastener is a
problem I was concerned with, so a punch should be in my toolbox. A lot of potentials in the posts here. Thanks for the response. I will check into the suggested sources. Gary Brady wrote: If the sound deadening material or mat is made of fibrous material, like carpet, you may have a problem with the drill screw winding up the fibers or yarn. This occurs when you try to drill through carpet. You may have to cut the sound deadening material with a round punch before drilling. Gary Brady Austin, TX |
#10
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www.spaenaur.com
You can get broad flat (wafer?) head & sealer washer self tapping screws that have torx/hex/robertson drive. We've used them successfully in similar apps. Thinner ones drill easier but snap off if you are over zealous. wrote in message oups.com... I am looking for ways to attach components to the floor of a truck. The floor could be as much as 1/4" thick plate with 1/2 inch or so thick mat and sound deadening material. I want to be able to use something like a drill screw or a threaded insert for two reasons. One is that I want the person to be able to work alone and the other is that many times it will be difficult to impossible for someone to get access to the other side of the floor area. I would like the head of the fastener have a positive grip such as a torx, hex head or square drive. Any ideas? |
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