As a matter of course, in product review writing, I do cost analysis, or roi analysis of the tools or products being tested.
I have read alot on this forum (and elsewhere) about the cost of Festool abrasives. I have even seen guys wanting dealers to crack open boxes and sell by the piece. Or guys going in on a box together to share the cost.
Prior to testing Granat, we had extensively used other common orbitals and abrasives.
Isn't the purchase price of
THIS exactly the same per piece as
THAT?
It is. $.56/pc.
Then, factor in the mileage difference. If conservatively Granat produced twice the mileage (it will), wouldn't it end up costing half as much to use? Thats without even factoring in the more than ancillary time savings of the rest of the Festool platform behind the abrasives (dust collection, lower surface temps, less load and swirl, therefore less sanding overall), less time swapping out and disposing of spanked discs, less time vacuuming up dust when you finish sanding...
This is just a quick little cost analysis, but we take it deeper. We even look at how many boxes of abrasives we have to run on a sander before the sander pays for itself. How many bags through an extractor, etc. I won't bore you all with those particulars, but you may not be surprised to hear that the numbers suggest that a sander can pay for itself well in advance of its warranty expiration, in some cases several times over.
Use of Granat does change each task. Production rates change.
Use of the whole system - sanders, abrasives and extractors - affects overall project numbers.
Your only hard choice is whether to use all this added value to give yourself a competitive edge in estimating and selling, or to let it settle in your margins, or boost them. It's nice to have options. Personally, I am not into working more efficiently and making less money as I do it. If a task took us an industry standard 6 hours without Festool, and we can cut it to two hours using Festool, then the price just went up. That is how I will pay for every piece of Festool on my wish list. I just need to find more projects where I can use a jigsaw and a circ saw.
That is how I evaluate tools. They have to be capable of being profitable tools, paying for themselves quickly, and making money for the rest of their lives.
Granat is a consumable, so it can really only be measured in terms of lifespan versus comparable consumables. But the sanders and extractors that I run with them are not consumables and are measured as above.
Sorry for the ramble. So many good threads here that get me thinking...