2005 Combined Catalog

Diamond Engineering has a long history in racing. We have worked with many of the top racers and teams to
develop our fastener line into what it is today, Race Proof®. Listed below are some of the racers and teams past
and present that have used and helped to develop Diamond Engineering’s Race Proof® fasteners.
John Basore, Cycle Performance Products, H-D/Aermacchi vintage road racer
Jerry Cameron, Suburban H-D, Hot Street, Street Pro, Outlaw Street
Chad Cox, Hampton Roads H-D, Top Fuel
Mark Cox, Crossroads H-D, Top Fuel
Dan Fitzmaurice, Zippers Performance Products, Pro Stock
Gemini Technologies, H-D factory VR1000 race team
Glenn Kachel, Hip’s House of Horsepower, Stock to Pro Stock
Travis Lummus, Gene Lummus H-D, Street Pro
Jim McClure, Master Performance Cycles, Top Fuel Legend and engine builder
Ray Price, Ray Price H-D, Top Fuel
Don Tilley, Tilley H-D, 883 Road racer, Buell Road racer, VR1000 Road racer
Johnny Vickers, Hawaya Racing, Top Fuel, Pro Fuel, Pro Gas engine builder
Pictured is Jerry Cameron’s “Pro-Shocker”. Jerry, better known as “The Cop”, has been involved in Harley drag
racing for years. He has numerous accomplishments throughout the years in many street classes. One of his most
notable being two time Flash Race Champion with sub 7 second ET’s in the eighth mile. Engineered and built to
compete in AMRA’s new Outlaw Street class, the Cop’s new bike is sure to be a threat in this class as well. This
new class is a step above Hot Street, allowing more cubic inches, multiple carburetion and lockup clutches. A
maximum wheelbase of 70” and street tires must be used while no wheeiie bars or air shifters are allowed. The
chassis is a modified 2004 Sportster by Jerry Cameron and Jody Schmeisser utilizing Kosman race components
and completely assembled with Diamond Engineering’s Race Proof® fasteners. The body is a custom carbon fiber
Buell XB12 Hybrid by Supersound Composites.
The heart of the beast is a HAL’S Speed Shop 137” S&S Pro
Stock engine. Countless hours of machining was done to make
provisions for a charging system and starter on the Pro Stock
motor. Rob Schopf of HAL’S did cylinder head porting and
assembly while Diamond
Engineering supplied all the
necessary fasteners including
custom made 630 stainless head
bolts. To insure that this motor is
fed an adequate amount of fuel Tom
Bradford of Thunder Eagle Racing was
enlisted to supply the Twin Super D’s
and intake. This bike will be debuted in
late 2005 and should break into the 8’s
at 150mph +.
Complete Manufacturing
and Machining Facilities
Material Choice: Quality Starts Here
Diamond Engineering specialty fasteners are CNC
machined in house using only the best quality materials.
Purchased directly from the steel mill two alloys are
employed to make the majority of fasteners and
components. For items such as spacers and non critical
fasteners 303XL alloy is used. A technologically advanced
product that allows for superior machinability and holding
precision part tolerances. Even before machining starts the
tolerances of this material is better than most finished parts
on the market today. Improvements of 50% over commercial
ASTM standards for straightness and diameter plus perfect
machining consistancy bar to bar insures quality parts from
the first to last piece.
High performance applications such as head
bolts and brake rotor bolts require material
with excellent ductility and high tensile
strength. For applications such as these 630
Stainless was chosen. Even before
machining and heat treating this material is
tough. In the solution treated/conditionA raw
bar form, this material has a tensile strength
of 145-170 ksi tensile. To compare this, grade
8 bolts are 150 ksi tensile after heat treating.
This material is already as strong or stronger
before machining! After all machining
operations are completed 630 stainless can
be heat treated (aged) to a variety of
conditions. Depending on application
demands an ultimate tensile strength of up
to 190ksi tensile (25% stronger than GR8)
can be achived.
Diamond Engineering • Phone: 386-677-9093 • Fax: 386-677-2384
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Manufacturing Process: Performance & Consistant Quality
Performance and consistant quality is what every company strives
for in it’s products. Diamond Engineering reaches these goals
and beyond. Manufacturing our products from raw material to
finished product in house using modern and hi-tech maching
processes we are able to control all aspects of quality. Pictured
here is our Mazak CNC Turning Center. All operations including
thread rolling and forming of the bolt head can be done on one
machine.
Thread Rolling in process
Forming a 12 Point head
Robotics and Automation are being
incorporated into the manufacturing
process to enable “lights out” production.
This illustration shows the difference in grain flow between a rolled
thread, left, and a cut thread, right. Additional tensile strength and
improved surface finish are inherent by-products of the thread
rolling process.
Virtually every fastener produced by Diamond Engineering has rolled threads as opposed to cut. Diamond Engineering
chooses to use this method for several reasons. Increased accuracy, better surface finish, greater tensile, yield and
shear strength. When roll threading, you are actually flowing and compressessing the grain of the material as opposed
to cutting away the grain. By doing this you work harden and burnish the surface. The work hardened flank provides
increased surface tensile, yield and shear strenght. Due to pressure deformation, a residual compressive stress
system builds up at the thread root, which counter-acts tensile loading. When compared to a cut thread, the load
capacity of the rolled thread is increased by up to 15%.
Diamond Engineering • Phone: 386-677-9093 • Fax: 386-677-2384
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Gaging of Thread
Precision thread rolling means precision gaging.Diamond Engineering uses Tri Roll
thread gages to measure all fasteners we produce.This method allows the
measurement of full profile, pitch diameter, best wire, minor diameter, major diameter
and lead/flank angle with 1/10000” readings.
Coventional Go and No-Go gages only tell you if the thread is good or not. You have
no idea if you are on the high or low side of the tolerence. Diamond Engineering
does not use this type of gaging. We use Tri Roll gages for machine setup and
throughout manufacturing to insure consistant quality parts.
Standard fasteners, especially button caps have shallow allen key holes that lead
to “rounding out” of the hex over time even using
proper tightening specifications. All specialty socket
style fasteners produced by Diamond Engineering
are broached deeper than the ANSI/ASME standard
calls for. For example the button cap style head bolts
we manufacture has a key depth 20% deeper than
the ANSI/ASME standard. This bolt has a torque
specification of 40 lb.ft.. In our first test we were able
to achive 115 lb. ft. of torque before falure. What was suprising is the fact that the
allen key snapped in half and the bolt was still servicable. In subsequent tests at
least 100 lb. ft. of torque was reached before any failure occured. In most cases it
was the tool that failed not the internal hex of the bolt. Whether it is a critical engine
application or an accessory cover we engineer safety and performance in each
fastener we produce.
Cross section of Head Bolts showing deep socket for allen wrench. Parts are also marked in critical
areas for Rockwell hardness testing. This is to confirm proper hardness throughout the entire bolt.
The final step after all the engineering, machining and testing is to produce
the Best Finish in the industry. Testing equipment like this surface roughness
gage is used to insure that a consistant finish is achieved throughout
production. By measuring the part surface in millionth’s of an inch, cutting
insert wear can be monitored as well as the desired part finish prior to
polishing. Pictured here are profile evaluations of a head bolt, On the left is
the rough surface left by the machining process, on the right is the finish
after polishing.
All bolts are polished to a mirror finish. Second to none!
Just ask our customers.
Diamond Engineering • Phone: 386-677-9093 • Fax: 386-677-2384
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