Wright Drive ® ...More Strength. More Torque.
Longer Tool Wear.
12-pt. Wright Drive tools give you ten times more fastener contact!
LOW
HIGH
Conventional. This Finite Element Analysis display
shows that ordinary sockets create extremely high
stress loads at the fastener corner and at the socket’s
inside corners. The illustration shows that this stress is
concentrated in a very small area.
LOW
Approximate .005" length of flat contact at engagement under load with
5/8" conventional design and SAE Grade 5 fastener.
Early First Generation designs concentrated on reducing the rounding
of fastener corners by moving the stress zone farther away from the
corner. However, these modifications– known as First Generation AS954
tools–result in a reduction of leverage. While First Generation designs
reduce the tendency to round fastener corners, the relatively limited flat
contact area still tends to mark, indent and distort fasteners and fittings
made of soft steel and brass.
First Generation.
HIGH
First Generation. While stress is relieved on the
fastener corner, there is no significant improvement in
relieving concentrated stress on the inside surfaces
of the socket.
Maximum .030" length of flat contact at engagement under load with
5/8" first generation AS954 design and SAE Grade 5 fastener.
LOW
The Wright Drive was created and patented by the Wright Tool Company,
taking full advantage of advanced CAD/CAM technologies. It actually improves
the torque load capabilities of every fastener, whether it’s a soft stove bolt or a
hardened aerospace fastener.
• Torque loads are moved away from fastener corners to prevent rounding.
• Stress is distributed over a much larger area of the fastener.
• Leverage is improved, eliminating fastener rounding and increasing
tool strength.
• Tool-to-fastener contact area is ten times greater than with a conven-
tional design, and almost twice that of a First Generation AS954 tool.
Wright Drive.
HIGH
Wright Drive. The Wright Drive distributes stress evenly
across the socket and fastener faces, away from the
fastener corners, and over a larger flat contact area than
ordinary sockets allow. There is a significant improvement
in distribution of stress at the socket’s inside surface.
Maximum .057" length of flat contact at engagement under load with 5/8"
Wright Drive design and SAE Grade 5 fastener.
Conventional.
Conventional designs put all of the load too close to the fastener corner.
Extra fasteners were used to share the load. This was fine when over-
engineered products required low-torque fasteners. But industry moved
away from over-engineering. As the demand for high-torque fasteners
increased, so did the demand for a new generation of high-torque tools.
Today, every fastener should be fully tightened. Installation is more
demanding and removal is more difficult.
The Wright Drive ® 12-point design distributes contact stress more effectively
than any other wrench system available. It spreads stress evenly over a larger
contact area and away from the fastener corners. The result is up to ten times
more tool-to-fastener contact area than conventional wrenches. This design
improves fastener torque load while decreasing rounding and distortion of
the fastener. To better understand the advantages of the 12-point design, one
must look at the designs that led to the introduction of the Wright Drive.
6-pt. Wright Drive tools have greater strength & torque, plus
better gripping power!
The patented 6-point Wright Drive is, in effect, a careful blending of Wright’s
12-point design with the heavy-duty gripping characteristics of a traditional
6-point wrench opening. It offers many of the same advantages of the
12-point design, including greater strength, more torque and reduced
rounding of the fastener corners. Patent No. 5,284,073.
The main advantage of the 6-pt. design is its gripping power. The Wright
Drive’s minor circle diameter, which is a measure of the ability to grip an
undersized fastener, is exactly the same as a traditional 6-point opening.
The smaller the diameter, the better the grip on undersized fasteners and
fasteners with badly rounded corners.
U. S. Patent No. 4,882,957. German Patent No. 42 08 548.
Fully certified for 12-point aerospace fasteners under AS954 specifications.
CONVENTIONAL
SCALE: 10x
CONVENTIONAL
CORNER LOADING
6-POINT WRIGHT DRIVE
SCALE: 10x
6-POINT WRIGHT DRIVE
MORE SURFACE CONTACT
www.wrighttool.com
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