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Weird, must be the one of the few areas I've been lucky in. I have never had a problem with any TORX head fasteners. Perhaps it's because I was aware of the existence of TORX PLUS in addition to the standard TORX head screws.
It's hard to comprehend why Sears / Craftsman sets didn't include the T27 bit. WTF? I lucked out and bought a set of each from either MSC or McMaster Carr when they were on sale. Must of been MSC, I'm not aware of McMaster running sales.
"Since the torx screw was designed for automated assembly it now showing up in many places including automobiles. It is even becoming popular in the construction industries.
The TORXŽ (rhymes with "forks") fastening system was developed by Acument Global Technologies' Camcar LLC group (formerly Camcar Textron) and is the trademark for a type of screw head characterized by a 6-point star-shaped pattern. People are often not aware of the trademark 'TORX' (which is always capitalized) and often refer to such a driver as a star screwdriver. The generic name is hexalobular (hex-lob) internal driving feature and is known as ISO 10664 by the International Organization for Standardization. One of the primary advantages of a torx fastener is the elimination of cam out. Cam out is when the screwdriver slips out of the screw head once a certain torque is exceeded. In the earlier days of manufacturing, the Phillips screwdriver replaced the slotted driver. It was self centering which allowed for automated assembly. The Phillips head screw and screwdriver system was designed to cam out to prevent over-tightening. This was before torque-sensing automatic screwdrivers existed. These properties were used to speed up production although camming out damages the screw and also the screwdriver. As torque-limiting automatic screwdrivers became available, the torx system was invented. By design, torx head screws do not cam out. When the desired torque is reached the driver stops applying torque. This pretty much prevents damage to the driver tip, screw head and workpiece. It also allows for the torque to be consistently applied.
The torx system is known as 'Torx T' and has the following features:
Straight sidewalls prevent cam out
Allows high torque transmission
Circular geometry increases drive bit engagement
Drivers last ten times longer than Phillips
15° drive angle prevents full engagement of the drive bit and fastener
15° drive anglepermits a small amount of radial stress which reduces driver bit life
TORX PLUS
Camcar LLC also developed an improved profile which they designated TORXPLUSŽ. Instead of 'V-shaped' points the torx plus has 'U-shaped' points. It has a 0° drive angle versus the 15° drive angle of the standard torx system. This allows for the torx plus screwdriver to mate better with the torx plus screw sidewalls providing greater torque and less wear.
The torx plus system is known as 'Torx TS' and has the following features:
Spreads driving forces over larger area which ensures optimal torque transmission with reduced clamp load
Straight, vertical sidewalls eliminate cam out
Completely encloses driver bit which reduces tool slippage and application damage and extends tool life
Little or no end load is required to keep the screwdriver engaged in the screw recess which reduces fatigue and muscular stress during manual assembly
Maximizes engagement between driver and screw (true 0° drive angle)
While standard torx drivers can be used to drive torx plus screws, it is not recommended since there will be a loose fit that prevents full torque. Torx plus drivers will not fit standard torx screws.
There is also a tamper resistant version of torx plus screw that has five lobes instead of six with a post in the center and is known as a torx TX".
"TorxŽ Star-shaped drive with six rounded points allows maximum transfer of torque. Provides a high level of security without sacrificing accessibility.
Torx PlusŽ Elliptical groove design maximizes engagement depth between driver and fastener. Ensures optimum torque transmission, and virtually eliminates camout.
I have changed out 98% of my torx heads to stainless allen heads and couldn't be happier.That is my suggestion to those out there. Ace hardware has them all.
So, I'm a little confused . Can I use a Torx Plus bit in a regular Torx head screw? And, since I have a 2010 Fat Bob, are all the screws Torx Plus. How can I tell?
I have "half" stripped one of my footpeg mount torx bolts. I could not see how I could apply enough pressure to the socket wrench to keep the bit in the bolt end while I also applied enough rotational force to get the thing to turn. Seemed like there was no way it was sitting in deep enough in the end of the bolt to get anything to bite into.
I thought the solution was an impact wrench gun.
Thanks to you I will check out and see if a #27 is the missing link, or if I need to get some torx-plus bits. I might be able to save the situation yet...
Great post! Thanks. Just wish I'd read it 6 month's ago. Then I wouldn't have spent 3 hours drilling out a torx head I stripped over tightening a while back on my voltage regulator cover.
No, not the only way. You need to be 2% smarter than the material you're working with.
In my trade (cabinet maker/installer), I won't use anything but torx screws.
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. Can I use a Torx Plus bit in a regular Torx head screw? And, since I have a 2010 Fat Bob, are all the screws Torx Plus. How can I tell?
