Holmz said:
Oliver,
Is it in the fine print? Or how would he know it?
Hi!
I'd like to say common sense but thats not really true. It's more like educate yourself about the tool, it's capabilities and the accessories you're going to use.
You can use adapters to go anywhere. I could take my 1/4" / 6.4 mm HEX drive Snap-On T72 ratchet, use the 3/8" drive adapter mentioned in this thread, add a 3/8" -> 1/2" drive adapter, add a 1/2" -> 3/4" drive adapter .... until I get to 1 1/2" drive... Should I do it? Obviously not. Do I need to be a trained mechanic to know that this is not going to play out in my favor? Again, obviously not. And I don't need any fine print for that.
And now imagine that with the force of a power tool driving it.
Why would I place a 3/8" drive socket on a 1/4" drive tool? I will never understand why Festool added the adapter in question to the Centrotec HD installers set for example - because this is effectively the result: people trying to place a 3/8" drive socket on a 1/4" drive tool. This will work once, twice maybe a hundred times and nothing will happen - but it's not what the machines are made for. And in case of the adapter: it's the use with an impact driver that it is probably not meant to be for.
With a little bit of knowledge about soft and hard screw-joints you'll sooner or later find out that there are different types of bits for different purposes. Now, while a hard bit would be the right choice for soft screw-joints, it's not so much in combination with an impact driver. And the same goes for sockets or any kind of adapter - if it goes on an impact driver it should be rated for that, meaning it is tempered to be tough and not just hard (=brittle).
I have no idea if Festool says the bits and adapters that come with the various sets are good for use with an impact driver, but judging from this experience they're obviously not. And it doesn't surprise me as the Ti15 is discontinued, so there is no need for impact rated accessories. A picture of that broken adapter would be great, btw.
In the end: using an adapter to go up in size is almost always a very bad choice. You can do that if you know what you are doing/ asking of the tools involved. But it's hard on the tools, hard on the accessories - especially with the power an impact driver can generate. The weakest link will eventually break when doing this.
Kind regards,
Oliver