In preperation for building, hopefully, a nice router, I have been collecting tid bits. Ive gotten lucky, I think, and purchased 4 new 12" THK HRW-21 linear rails, each with a brand new HRW-21 bearing block.
I got the first pair of 2 in the mail yesterday.. They are extremely handsom. Powdery colored grey finish, brand new.. no rust, clear grease. brand new.. $30.00 each rail\block, including shipping (around $200/each new normally)
OK. my question is. How smooth should the movement on these be right out of the wrapper? They were sealed in plastic bags... They were quite stiff at first, and began to get smoother with some manual manipulation. However, they are still quite.. chunky.. and loud.. i beleive they can ahve their preload adjusted via a set screw, and I also remember learning that some linear rails run much smoother, and with less friction under load...
Anyone know what I am talking about?