Heavy Duty Diff
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 NEW HPI SAVAGE FLUX Super Heavy Duty Differential Diff  US $59.95
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 HPI 85481 Heavy Duty Diff Gear 48 Tooth US $45.60
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 NEW HPI SAVAGE XL 59 Diff Heavy Duty Cups 46 X HXL13 US $38.24
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 HPI 85481 HEAVY DUTY DIFF DIFFERENTIAL GEAR 48T BAJA 5T US $36.87
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 HPI 85481 HEAVY DUTY DIFF DIFFERENTIAL GEAR 48T BAJA 5B US $36.87
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 86278 HPI HEAVY DUTY DIFF SHAFT 14X34MM SILVER US $34.76
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 HPI Nitro Baja 5B Super Heavy Duty Diff Shaft 25x48mm 2 HPI104965 US $27.75
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 FF03 HEAVY DUTY STEEL BALL DIFF US $26.00
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 HPI Baja Super Heavy Duty Diff Shaft 25X48mm 2 104965 US $24.28
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 HPI NITRO RS4 3 18SS CAMARO 86332 HEAVY DUTY DIFF SHAFT 5X21mm SILVER 2pcs US $20.36
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 HPI MT2 Heavy Duty Diff Shaft 5x26x7mm US $19.54
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 3Racing Heavy Duty Gear Diff Set For SAKURA ZERO S US $17.90
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 HPI Savage XL Super Heavy Duty Diff Shaft HPI86248 US $12.75
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 HPI 86248 Super Heavy Duty Diff Shaft 9x11x34mm 2 US $12.01
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 Axial Heavy Duty Diff Locker AX30500 For AX10 SCX10 US $12.00
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 HPI HEAVY DUTY DIFF SHAFT 14X34MM SILVER 2PCS 86278 US $11.75
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 HPI Savage Heavy Duty Diff Shafts NEW US $11.49
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 HPI 86332 HEAVY DUTY DIFF SHAFT 5X21MM SILVER 2PCS US $11.00
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 3RACING FOR KYOSHO MINI Z AWD Diff Outer Joint Heavy Duty AWD 15 HD US $7.60
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 Vorza F or R Heavy Duty Differential Diff Case US $7.50
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 HPI Heavy Duty Diff Shaft NMT 2 HPI72213 US $7.49
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 Traxxas 5681 Carrier Diff Heavy Duty Linkage Arms Gask US $4.92
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 Traxxas Diff Output Yokes Heavy Duty 2 Stamped 6828X US $4.29
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 HPI Diff Screw Heavy Duty Nut Set HBS Cyclone HPI73522 US $4.19
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 3003 Racers Edge MAXX Heavy Duty Diff Grease US $3.99
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 NEW Traxxas Heavy Duty Diff Output Yokes Stampede 4X4 2 6828X NIB US $3.59
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 Agama Racing Heavy Duty Plastic Diff Cup AGM9200 US $3.49
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 Traxxas Slash 4X4 Heavy Duty Diff Output Yokes 6828X US $3.19
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 Traxxas Stampede 4x4 Heavy Duty Diff Output Yokes US $2.99
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 Associated Nitro TC3 TC3 Heavy Duty One Way Diff Shims US $1.49
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Automotive Part Maintenance Using an Ultrasonic Cleaner
If you're into classic automobile restoration or simply need to maintain your engine you might want to consider adding an ultrasonic cleaner to your arsenal. Small, cheap and easy to use, an ultrasonic cleaner is no longer the domain of the professionals. Today it is widely used by amateurs and hobbyists the world over for cleaning applications as diverse as surgical instruments and archaeological finds.
Originally ultrasonic cleaning was the domain of scientists who needed precision cleaning of laboratory equipment and tools. Nowadays, this inconspicuous but powerful piece of kit will likely be found in almost every town. If you have a mechanic or a watchmaker, a hospital or a factory, it's likely that there will be at least one ultrasonic cleaner.
Instead of employing a scrubbing brush and a variety of solvent degreasers to do your work, you can now leave it all to the ultrasonic cleaner. An ultrasonic cleaner is essentially just a tank filled with water. This is often complemented with a mild cleaning solution as well if the thing you're cleaning is extra dirty. On a more technical level, the cleaning unit uses an ultrasonic generator to convert low frequency mains electricity (tens of Hz) into electricity with an ultrasonic frequency (hundreds of kHz). This ultrasonic electricity is then converted by a piezoelectric transducer into sound energy (also with an ultrasonic frequency). The ultrasound then travels through the liquid contained in the tank and causes a process called cavitation. Cavitation is where microscopic bubbles expand as the sound wave approaches them and then collapse as the sound wave passes them by. The bubble collapse releases the energy that is used to clean, and as the sound is such high frequency, cavitation occurs extremely fast and on a massive scale. You won't hear the individual bubbles collapsing, just a gentle fizzing sound as it works its magic.
The small size and large number of these bubbles allow the ultrasonic cleaner to penetrate further than the line of sight into all the crevices and cracks that occur on the particular component. That means this method of cleaning is great for old engines where microscopic cracks might exist in engine parts. Further, it will clean in all the places you can't reach or you can't see. Pitted or heavily textured surfaces will also benefit from the action of the ultrasonic cleaner, which will get even the roughest surface clean.
In addition to their ability to clean so thoroughly, ultrasonic cleaners are more time-efficient than conventional scrubbing and solvent use. Further, they are able to clean multiple items at the same time.
Ultrasonic cleaners can vary widely in size and can accommodate a range of engine sizes and component shapes. Buy a heavy duty model and you'll almost be able to fit your whole engine in. More realistically it may take several batches before you've managed to get the whole engine as good as new. They're ideal for almost everything, from carburetors and crankshafts, to gears and diffs. If you want to add years to the life of your engine, look no further.
About the Author
Dr. Bob Sandor is a Director at Tovatech, a leading North American supplier of ultrasonic cleaner units. When not busy running his company he explores his fascination with the many aspects of various scientific & industrial devices. For more details on the above you can reach him through the ultrasonic cleaners section of his website.
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