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Complementary Technical Brochures brought to you by
for Service and Quality at a price you can afford . . . .
ENGINE
BUILDER’S
GUIDE
YOUR!
COMPETITIVE
EDGE
The Advantages of PEENING . . . .
This information sheet has been prepared to give guidance to the engine builder, (both for the road
and competition applications) an insight into the advantages of
STEEL SHOT PEENING
and
GLASS BEAD PEENING.
STEEL SHOT or GLASS BEADS
the choice is yours.
Each media can provide unique characteristics for your
valuable parts.
PEENING is a cold working process that is used to increase the fatigue life and prevents stress cracking of most metal objects. The outside of a part that has been peened all over has what is called a compressive layer that resists cracking. Since most cracks and stress failure start at the
surface of a part, the compressive stress layer that is formed by SHOT PEENING increases the
fatigue life of parts.
STEEL SHOT is used for heavy duty PEENING applications. GLASS BEADS being lighter than steel shot are used for low to medium PEENING operations.
The most important characteristic of GLASS BEAD PEENING for the engine builder is that the process leaves a microscopic nondirectional surface on metal parts. This “dimpled” surface does three things for the engine parts . . . .
Improves lubrication through better retention of oil.
Improves performance by reducing friction through a reduction of
bearing surface.
Increases fatigue life by stress relieving machined and forged parts.
GLASS BEAD PEENING is also an excellent process for the cleaning of metals. It produces that spotless look to alloy or provides that perfect preparation before coatings.
Parts which can
benefit from Steel Shot Peening
or Glass Bead Peening . . . .
Pistons
Master Cylinders
Springs
Intake Manifolds
Crankshafts
Camshafts
Transmission Gears
Magnesium Wheels
Rocker Covers
Steering Components
Cylinder Heads
Engine Housings and Covers
Connecting Rods
Valves, Springs and Retainers
Turbocharger Rotors and Housings
Any highly stressed components you may consider important enough
to warrant this type of treatment.
Consider the following . . . .
When any surface preparation is done on any
engine component the tough skin of the component is destroyed and it is recommended that some
form of surface treatment be carried out to restore the components surface to its original condition.
STEEL SHOT PEENING and GLASS BEAD PEENING
are viable processes to restore this characteristic.
Do not rebuild your engine without peening the pistons. It not only cleans them, it makes the skirts
better than new. GLASS BEAD PEENING closes the micro pores in alloys.
When valves are PEENED it is important that the valve stems are polished before assembly.
GLASS BEAD PEENING is used when the surface of the part you are using has to have a
smooth surface finish or when you are PEENING critical bolts that have sharp radius to the
threads.
Quality and Testing . . . .
Hi - Tech Blasting carries out all work in accordance to recognized standards and ensures
consistent peening results through the use of an Almen Gauge.
The Almen intensity scale was developed in order to duplicate shot peening of different metals
time after time.
Do not have your valuable parts peened unless an Almen Intensity gauge is available to
verify the machine settings and potential results.
If you want Service and Quality
at a price you can afford . . . .
contact us now!
and join the winners
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RACERS and RESTORERS
I can reduce your racing costs by increasing the fatigue life of stressed
components
like Cranks, Rods, Gears and Pistons.
Or any component that you warrant important enough to have treated.
I can produce that spotless look to alloy or provide that perfect preparation
before painting.
My method of cleaning removes all foreign matter from metal, such as
scale, corrosion, paint or carbon.
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SOUTH AUSTRALIA'S BEST KEPT SECRET!
is a dynamic business called Hi - Tech Blasting
The preparation that goes into a competition vehicle of any type - especially in the early stages of the
building programme - is what will really determine the long term reliability of that car. Whilst
mechanical breakdowns can happen to anyone no matter how painstaking the preparation; they do occur
considerably less to those teams and individuals who realize the value of taking the time out to do the job
properly at the start.
Proper treatment of the engines internal components is an involved process which many don't bother with,
but is typical of that sort of detail one should go to in the quest for both power and reliability.
The process of glass bead blasting, which is primarily a cleaning process, has the added benefit or ability
to stress relieve the components being treated. Components suitable for this treatment would include inlet
and exhaust valves, valve springs, valve spring retainers and collets, pistons, camshafts, harmonic
balancer and pulleys, crank sprockets or gears, inside cylinder heads, manifolds and even the precision
internals of the turbocharger. For the larger components, however, like the crankshaft, conrods, flywheel
etc., it is best to have the more specialized treatment of shot peening, a much older process using steel
shot. The density of the shot (which is naturally higher than glass beads) will produce a greater kinetic
energy for the same velocity as the glass beads. This means that the strengthening process by peening is
more beneficial for those components than glass bead blasting. Many components receive a dual process, the first is the steel shot peening process followed by a subsequent glass bead blasting process. The reasoning is that the steel shot process strengthens the component and the second process of glass bead blasting reduces the surface roughness and produces a metallurgically clean surface which is
contamination free.
The trick is knowing just what is the best process for the components being treated and South Australia's best kept secret is Neil Collins from Hi - Tech Blasting. He has thirteen years of knowledge and experience to advise customers on individual job requirements.
Neil started his operation some years ago in a small garage and he was heavily involved in the preparation
of Denise McGargill's old Group G Lancer. It took Denise to the runner up position in the South
Australian Rally Championship to the modern 4WD cars. During the season Denise was able to beat
every other competitor at various events and the Lancer was totally reliable throughout with absolutely no
components replaced at any stage.
Hi - Tech Blasting has since expanded its activities considerably and has been involved with the preparation of vehicles for the Australian Safari, Hill climbing, Road Registered Racing, Hot Rods, Go
Karts, Sports Sedans and more! Involvement with restoring vintage and classic cars as well as modern
and historic 2 stroke and 4 stroke motor cycles rounds out an amazing range of experience.
Hi - Tech Blasting has moved to larger premises, and has re-invested in new state of the art equipment. An expanded range of services is available to customers which includes magnesium cleaning, strengthening and a protective coating.
This special coating is applied to protect the magnesium from corrosive attack. Magnesium has the ability to absorb moisture from the surrounding air which will encourage corrosion to commence. Even if the part is painted, a non coated component will have absorbed sufficient moisture from the surrounding air, prior to the painting process to allow corrosion to commence and it will continue to corrode under the freshly painted surface. The corrosion develops beneath the painted surface and is very difficult to detect and is extremely harmful, as it is generally a localized form of corrosion which will induce a crack. This crack will tend to grow quickly eventually leading to a component failure. The magnesium protective coating applied by Hi - Tech Blasting is the only way to avoid this type of corrosion. The coating has been used successfully on English, European and Australian magnesiums and the finish produced is an attractive matte dark grey.
Hi - Tech Blasting also offers a dry film lubricant coating for pistons and all components like camshafts, turbo bearings, crankshafts, sprockets and others which will benefit from reduced frictional drag.
The current expansion also sees the introduction of a crack detection service of magnetic or penetrant either by visible or ultra violet techniques.
Add to this the prototyping of surface finishes and the development of novel surface finishes for all metals and you have a complete picture.
So if you have a requirement for any of the those applications mentioned in this article which includes
precision cleaning. deburring or finishing, by utilizing the benefits produced by the glass bead blasting or
steel shot peening process you should contact Neil Collins of Hi - Tech Blasting. If you who do not live in South Australia you can use the mail order facility. The address to forward your parts or any correspondence is Hi -Tech Blasting, 16 Greenview Drive, Seaton, 5023 South Australia.
Hi - Tech Blasting's motto is to produce a quality product and provide individual customer service at a cost effective price.
Hi -Tech Blasting
for Metal Surface Treatments
* Cleaning, Deburring, Finishing and Stress Relieving
* Utilizing Steel Shot Peening and Glass Bead Blasting
* Magnesium Cleaning and Protection Service
* Friction Reducing Coating Service
* Crack Detection Service
* Specialized Surface Preparation for further treatments
* No job too small - a specially designed cabinet is available
for all small and delicate parts.
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VINTAGE MOTORCYCLE FINISH
Remember the MAGNESIUM finish on the
Manx Norton, G50 Matchless, 7R AJS
or those Exotic Italian Racing Machines ....
Now it’s available to you.
Get that dark charcoal grey protective coating applied to your magnesium
components. Your restorations will benefit by their authenticity and from
the corrosion protection that Hi -Tech Blasting’s specialized service of
Precision Cleaning and Protective Coating for Genuine Magnesium
Components.
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Hi - Tech Blasting has over
13 years experience
with metal CLEANING and
PEENING ....
* all jobs are completed on time
every time at an agreed price.
* no job too small
* mail orders welcomed
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This information sheet has been prepared to give guidance to the engine builder
(both for the road and competition applications)
an insight into the advantages of Steel Shot Peening and Glass Bead Blasting.
STEEL SHOT PEENING
or
GLASS BEAD PEENING
The choice is yours, each media can provide unique characteristics
for your valuable parts.
PEENING VERSES BLASTING
The term PEENING is used when the process is used primarily to alter the mechanical properties or impart a compressive skin over the surface of the metal part. On the other
hand BLASTING is the term used when the process applies a finish, cleans, deburrs or otherwise prepares the surface of the metal part. Blasting too may produce a compressive
skin on the part, but this effect is secondary.
Generally SHOT PEENING refers to peening with metal particles as opposed to GLASS BEAD PEENING.
Sand blasting is a surface cleaning process using coarse sand or other abrasive particles.
Whereas GLASS BEADS OR METAL SHOT particles are spherical, the sand and abrasive particles are irregular and so actually remove metal from the surfaces they strike.
Neither GLASS BEADS or METAL SHOT poses this problem.
Metal shot being heavier the glass beads are used for heavy duty applications. Glass
beads are used for low to medium peening or blasting.
SHOT PEENING
Is a cold working process that is used to increase the fatigue life and prevents stress
cracking of most metal objects. In shot peening the surface of the finished part is blasted
with round steel shot. Every piece of shot works like a peening hammer and when the
surface has been peened all over, this prevents the formation of stress cracks that can lead
to fatigue and failure. The outside of a part that has been shot peened has what is called a
compressed layer that resists cracks. Because most fatigue failure and stress failure
originate at the surface of a part, the compressed stress layer that is formed by shot
peening increases the life of parts.
GLASS BEAD BLASTING
Is the newest form of peening and its use of tiny glass balls, sometimes not much larger
than a grain of talcum powder, which because of their roundness, hardness, density,
chemically inertness and other properties can be blasted through a nozzle at controlled
rates (and in controlled sizes) to give remarkable advantages.
One of the most important characteristics of glass beading for the engine builder is that
the process leaves microscopic "dimpled" nondirectional surface on the metal parts.
This "dimpled" surface does 3 things for the engine parts;
* It improves lubrication through better retention of oil.
* It improves performance by reducing friction through a reduction of
bearing surfaces.
* It increases fatigue life by stress relieving machined and forged parts.
Parts which can benefit from steel shot peening and glass bead blasting are:-
Wheel cylinders
Springs
Intake Manifolds
Camshafts
Wheels
Crankshafts
Master Cylinders
Transmission Gears
Steering Components
Cylinder Heads
Engine Housings and Covers
Connecting Rods
Valve Springs and Retainers
Any highly stressed components you may consider important enough to warrant this type
of treatment.
SOME POINTS TO BE CONSIDERED
Do not rebuild your engine without peening the pistons, it not only cleans them, it makes
the skirts better than new. Peening with glass beads closes micro cracks and pores in
alloys.
When valves are peened it is important that the valve stems are polished before assembly.
Crankshafts are normally peened only in the fillets and throws, whilst the bearing
journals and thrust faces when required are masked. Critical areas of connecting rods are
the fillets next to both the big and little end bores, but connecting rods are usually shot
peened all over, except the bearing holes.
Glass beads are used when the surface of the part you are using has to have a smooth
surface finish or when you are shot peening critical bolts that have a sharp radius to the
threads.
Recommended steps to be followed in the preparation of crankshafts and connecting rods
for rebuilding:-
Dismantle, clean and degrease
Crack Test
Rough grind and shape
Polish (no need to produce a mirror finish)
Size and Balance
Touch Polish (to clean balance grind marks)
Shot Peen (including con rod bolts)
Glass bead peening to leave the surface metallurgically clean
Wash and scrub the components thoroughly prior to use
When any surface preparation is done on any engine component the tough skin of
the component is destroyed and it is recommended that some form of surface treatment be
carried out to restore the components surface to its original specification.
SHOT PEENING and GLASS BEAD BLASTING are viable processes to restore this
characteristic.
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* STEEL SHOT PEENING
* GLASS BEAD BLASTING
* STRESS RELIEVING
* PRECISION CLEANING
* PROTECTIVE COATING FOR
GENUINE MAGNESIUM
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South Australian's can now have steel shot peening or glass bead blasting carried
out
to the highest standards of workmanship.
Quality and testing are assured to give your valuable parts the correct preparation and treatment.
* SHOT PEENING
of conrods, crankshafts, axles, etc., for greatly increased
strength and reliability.
* GLASS BEAD BLASTING
for precision cleaning of any metals including
engine components.
These processes are a benefit to motorcyclists whether you are completing a restoration, a road rider or have particular racing applications.
SHOT PEENING and GLASS BEAD PEENING
help reduce the overall cost of your motorcycling.
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IMPORTANT WARNING
Components that have been either steel shot peened or glass bead
peened or blasted by Hi - Tech Blasting need a post treatment prior to their intended use.
Please note that it is the responsibility of the assembler to ensure all
precautions have been taken which will reduce any possible source of
contamination.
Please ensure that no media (shot or beads) has become entrapped or
embedded on the surface, in holes and cavities of treated components.
Thus it is necessary to thoroughly clean all components prior to use.
This warning is presented in the interests of all clients.
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