![]() It all depends on the individual requirement(s). However, if the intent of a surface grinding attachment for a grinders is spawned through some other need, where very high precision isn't required, then I'd say it would be a no brainer compared to the cost of a stand alone surface grinder. While I'm sure there are folks out there making folders with only a surface grinder attachment, I can't image the finished folders being very good/smooth IF the tolerances are the same as what I was able to achieve with the attachments. Take that for what it's worth to you, and I would expect the variance to differ based on many possible factors, but my opinion is that IF the reason you want a surface grinder is for building folders, I'd bypass the attachments, and get a stand alone surface grinder. What I saw with the surface grinder attachments I mentioned above were 2-3 thousandths over a 5" span/piece, and 3-5 thousandths over their 10" capacity. ![]() (that's something that most who offer the surface grinder attachments for nveniently leave out of their sales pitches) The BIGGEST issue with any surface grinder attachment used on a 2x72 grinders is.unless you have a dedicated, super hard contact wheel, that is used exclusively for the surface grinder attachment, then you run into the issue of the contact wheel(s) being too soft for the application, and the work piece/steel you're grinder comes out with a convex face, and destroys the entire reason behind using the surface grinder attachment. My little elcheapo harbor freight, 6x12" surface grinder will hold to 1/2 thousandth or less over a 6" span, and under two thousandths over it's 12" capacity.and it took a lot of work to get it there. Now, that being said, I look at surface grinders as to how precise they flatten materials/parts for folders, where I demand no more than about two thousandths variance, and prefer less than one thousandth. ![]() what I saw/found, in my limited experience, is that the attachment versions are not even close to the precision that an actual surface grinder offers. Having an actual surface grinder in my shop, did give me something to compare them to though. I've only used a couple.those being the one for the TW90, and then another "custom" made one. I don't have a lot of personal experience with any of the "attachment" type surface grinders. Waking up in silk sheets is the perfect way to start your Sunday reset. ![]()
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