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First CT70 Build...humble beginings
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<blockquote data-quote="69ST" data-source="post: 112854" data-attributes="member: 5"><p>My choice/recommendation of abrasives has nothing to do with the purveyor. Trinco is local...just the other side of town and a good outfit. The blast media should be selected for your specific circumstances. IMO, aluminum oxide is a really bad idea, unless you have a specific need for material that hard & aggressive. It does a terrific job etching glass, not what you want with a cabinet. It also devours blast gun bodies, nozzles & orifices. No argument, the cutting action is fast and it lasts a long time. There's just a lot of collateral damage to consider.</p><p></p><p>Glass bead is a lot softer (~5.5 vs 9.0 for aluminum oxide) and gentler...on everything with which it comes into contact. Thus, it can actually be cheaper to use, overall. Also, you won't have a profiled surface, with virtually zero removal of solid metal. The tradeoff is slower rust removal. </p><p></p><p>If you don't have a cabinet and enough compressor to power it, you're facing a nightmare DIY project. For a one-off, it'd be cheapest to farm-out the blasting chores. Just stay away from commercial outfits that are geared toward large-scale items...like salt trucks, dumpsters, railroad car chassis, etc. They'll do the job really cheap, and in mere minutes, but the blasting is far to aggressive...enough to remove a lot of metal, leave you with emery board like surfaces, possibly even cause damage. </p><p></p><p>I wouldn't want to do any media blasting around my shop outside of a cabinet...too messy. On the other hand, a big cabinet might eat too much real estate for your situation. Thus, if you're a longterm hobbyist who will have need of media blasting in the future a small, benchtop, cabinet might be a good compromise. You'd be able to handle everything yourself, except for big items, like the main frame section...which would be cheap enough to farm-out, occasionally.</p></blockquote><p></p>
[QUOTE="69ST, post: 112854, member: 5"] My choice/recommendation of abrasives has nothing to do with the purveyor. Trinco is local...just the other side of town and a good outfit. The blast media should be selected for your specific circumstances. IMO, aluminum oxide is a really bad idea, unless you have a specific need for material that hard & aggressive. It does a terrific job etching glass, not what you want with a cabinet. It also devours blast gun bodies, nozzles & orifices. No argument, the cutting action is fast and it lasts a long time. There's just a lot of collateral damage to consider. Glass bead is a lot softer (~5.5 vs 9.0 for aluminum oxide) and gentler...on everything with which it comes into contact. Thus, it can actually be cheaper to use, overall. Also, you won't have a profiled surface, with virtually zero removal of solid metal. The tradeoff is slower rust removal. If you don't have a cabinet and enough compressor to power it, you're facing a nightmare DIY project. For a one-off, it'd be cheapest to farm-out the blasting chores. Just stay away from commercial outfits that are geared toward large-scale items...like salt trucks, dumpsters, railroad car chassis, etc. They'll do the job really cheap, and in mere minutes, but the blasting is far to aggressive...enough to remove a lot of metal, leave you with emery board like surfaces, possibly even cause damage. I wouldn't want to do any media blasting around my shop outside of a cabinet...too messy. On the other hand, a big cabinet might eat too much real estate for your situation. Thus, if you're a longterm hobbyist who will have need of media blasting in the future a small, benchtop, cabinet might be a good compromise. You'd be able to handle everything yourself, except for big items, like the main frame section...which would be cheap enough to farm-out, occasionally. [/QUOTE]
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