xterra Posted January 18, 2015 Share Posted January 18, 2015 Having personally used a torx bit on a allen head bolt at the JY recently, I can appreciate this. I'm sure others here feel the same way. (Credit to Randall Munroe of xkcd.com - a great geeky comic) 3 Link to comment Share on other sites More sharing options...
Precise1 Posted January 18, 2015 Share Posted January 18, 2015 Fortunately, I have dealt with all of those (and more) for decades so I have pretty much every driver available other than security and 1 way screws; no need for those, yet. Years ago I had an engineer borrow some 3/8 drive torx bits to work on his Mustang. I had fun with him when I said "I hope these work on your Mustang since it is standard measurements when I bought these for my Nissan which is metric." and walked away. I was told he looked very confused. Oh, you forgot square drive... B Link to comment Share on other sites More sharing options...
adamzan Posted January 18, 2015 Share Posted January 18, 2015 You mean robertson? Link to comment Share on other sites More sharing options...
ahardb0dy Posted January 18, 2015 Share Posted January 18, 2015 I have a nice cheap set from Harbor Freight that is nothing but security bits Link to comment Share on other sites More sharing options...
Precise1 Posted January 18, 2015 Share Posted January 18, 2015 You mean robertson? You mean Scrulox? I prefer just calling it square drive, that way everyone can tell what it is... B Link to comment Share on other sites More sharing options...
ahardb0dy Posted January 18, 2015 Share Posted January 18, 2015 (edited) it's Robertson "Scrulox® is another Robertson Invention. An 8-sided (double square) decorative design that can be used with a standard Robertson bit, or for additional torque, a Scrulox®8 bit. These double square fasteners are used on Haulmark trailers and other industrial designs." Edited January 18, 2015 by ahardb0dy Link to comment Share on other sites More sharing options...
Precise1 Posted January 19, 2015 Share Posted January 19, 2015 Sure looks square to me. https://www.google.com/search?q=scrulox&biw=1680&bih=913&source=lnms&tbm=isch&sa=X&ei=lU-8VOGAKNL2yQSZuILADg&ved=0CAcQ_AUoAg I think the 8 sided is just a type of Scrulox. You say potato, I say square. It's all good... B Link to comment Share on other sites More sharing options...
ahardb0dy Posted January 19, 2015 Share Posted January 19, 2015 the 8 sided is a Scrulox, a double square invented by Robertson: Link to comment Share on other sites More sharing options...
Precise1 Posted January 19, 2015 Share Posted January 19, 2015 Quadrilateral? B Link to comment Share on other sites More sharing options...
Slartibartfast Posted January 19, 2015 Share Posted January 19, 2015 How about tri-square? I became acquainted with them the other day replacing a seat belt receiver on a Volkswagen. Luckily my boss had the set, because my tamperproof kit didn't have anything like it. I haven't run across Phillip's head, but then I don't generally look in the trunk. Link to comment Share on other sites More sharing options...
ahardb0dy Posted January 19, 2015 Share Posted January 19, 2015 I hate when Philips's head gets stripped off Link to comment Share on other sites More sharing options...
xterra Posted January 20, 2015 Author Share Posted January 20, 2015 I prefer the Robertson Square Drive for my woodworking because the bit doesn't typically slip out of the screw. Many years ago I had the misfortune of coming across one of these inside some electronics I was working on: Link to comment Share on other sites More sharing options...
Precise1 Posted January 20, 2015 Share Posted January 20, 2015 Quadrangle drive? B Link to comment Share on other sites More sharing options...
kdj Posted January 20, 2015 Share Posted January 20, 2015 I prefer the Robertson Square Drive for my woodworking because the bit doesn't typically slip out of the screw. Many years ago I had the misfortune of coming across one of these inside some electronics I was working on: I found one of those Y shaped one the other week while fixing a VCR tape...yes I have VCRs. IIRC Henry Ford was going to use the Robertson screw in the model T's but the Philips screw was cheaper. So because of this everyone who owned a Ford bought a driver and their popularity spread from there. Link to comment Share on other sites More sharing options...
Precise1 Posted January 20, 2015 Share Posted January 20, 2015 I understand that the Phillips head was particularly useful in the automotive assembly industry as well, The engagement geometery is designed to pop the driver out at a certain torque, so they prevent stripped threads and are 'self torquing'. The very thing most of us hate about them is actually a specific design feature and part of the reason they became so prevalent. B Link to comment Share on other sites More sharing options...
k9sar Posted January 20, 2015 Share Posted January 20, 2015 thought that was the pozi drive Phillips. Link to comment Share on other sites More sharing options...
Precise1 Posted January 20, 2015 Share Posted January 20, 2015 Backwards? Cross-head, or Phillips screw has an X-shaped slot and is driven by a cross-head screwdriver, designed originally in the 1930s for use with mechanical screwing machines, intentionally made so the driver will ride out, or cam out, under strain to prevent over-tightening. Pozidriv is patented, similar to cross-head but with better resistance to slipping, or cam-out. http://inventors.about.com/od/sstartinventions/a/screwdriver_2.htm Robertson drive head has a square hole and is driven by a special power-tool bit or screwdriver (this is a low-cost version of the hex head for domestic use). Oh, look, square drive! B Link to comment Share on other sites More sharing options...
k9sar Posted January 20, 2015 Share Posted January 20, 2015 guess I had it backwards. Link to comment Share on other sites More sharing options...
k9sar Posted January 20, 2015 Share Posted January 20, 2015 I always found it amazing hoe many types of screw you could insert/remove as long as you had the right sized flat-head screwdriver Link to comment Share on other sites More sharing options...
kdj Posted January 21, 2015 Share Posted January 21, 2015 I understand that the Phillips head was particularly useful in the automotive assembly industry as well, The engagement geometery is designed to pop the driver out at a certain torque, so they prevent stripped threads and are 'self torquing'. The very thing most of us hate about them is actually a specific design feature and part of the reason they became so prevalent. B Don't agree, just cheap so they survive. Link to comment Share on other sites More sharing options...
nunya Posted January 21, 2015 Share Posted January 21, 2015 Along with drawers of bits/drivers, I've got access to an electronic flame less torch, normal torch set, plasma cutter, cut off wheels, many drills... I don't care what the dam shapes are called or who named them, I'll get at least most of it out. 1 Link to comment Share on other sites More sharing options...
kdj Posted January 21, 2015 Share Posted January 21, 2015 Do you mean you get" at least most" of the fasteners (i.e. 4 out of 5) or "at least most" of the fastener ((over 50 per cent) out.? HA One of the best things I ever bought was a Dewalt impact driver. 18v will pop out old rusty Philips and nuts and bolts that I would only strip by hand. Other than that cut offs , drill and the grinder are my best friends. Sounds like you're ready for what ever pops up. Wishing I had a plasma. What kind do you have access to? Link to comment Share on other sites More sharing options...
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