The reaction is similar to a fireworks explosion, can create 4,500ºF sparks, and can occur when a grinder is used on ferric material (e.g., steel) prior to being used on an aluminum material or vice versa. This type of sparking and associated fire hazard may be eliminated by restricting the use of a grinder to only one type of material.
Signi Aluminum Grinding Wheel 4 1/2 for Aluminum Copper Non-Ferrous 10 Pack (Not Load While Grinding) 58 $3899 Get it as soon as Sat, Jul 23 FREE Shipping by Amazon More Buying Choices $37.49 (2 new offers) Amazon's Choice Pferd 61301 4-1/2" x 1/4" Grinding Wheel, 7/8" AH A 24 N SG for Aluminum - Type 27 17 -8%$799$8.69
So the aluminum on the piece rubs against the aluminum on the wheel, producing more heat, which produces more melting, and so on. The natural response of the person at the wheel is to push the piece harder against the wheel. But this will only cause more friction and heat up the wheel faster. If the wheel heats up enough, it can explode.
Long-Life Grinding Wheels forAngle Grinders— Use on Metals. Wheels are a blend of aluminum oxide and zirconia alumina, which removes more material and lasts three times as long as our General Purpose Grinding Wheels. They are also known as Type 27 wheels, raised-hub wheels, and grinding discs.
Signi Aluminum Grinding Wheel 4 1/2 for Aluminum Copper Non-Ferrous 10 Pack (Not Load While Grinding) 62 $3899 Get it as soon as Tue, Aug 30 FREE Shipping by Amazon More Buying Choices $37.49 (2 new offers) Flap Discs 20 PCS 4.5 Inch - 40 Grit Grinding Discs 4 1/2 Assorted Sanding Grinding Wheels,Aluminum Oxide Abrasives,Grinder disc 275
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