Hi Gaunless
In simple terms it's what you want to pay for it. what needs to be checked on any drill vice is for jaw lift, lead screw slop, flat base i.e. jaw lift is where the loose jaw tending to lift up as you tighten it, by doing so it will put your item out of vertical & drill holes off square ( damhik ) I got a 4" vice from M/Mart & I had to replace the keep plate from under the moving jaw, it was, loosely what I would describe as a piece of 3mm sh** plate.
I replaced it with a piece of 6mm BDMS.I also checked the flatness of the base to the jaw horizontal plane, it wasn't level, I ended up having to machine the base parallel to the jaws after ensuring the jaws were sitting parallel in their seating, as it was only touching on 3 corners.I finished up machining off approx 1 mm to get it to sit reasonably flat. I also made up a set of aluminium jaws machined to run parallel with the base & put a small 3 x 3 mm recess in the top for holding small items. as for the lead screw; I still need to rotate it near enough 2 turns to pick up the casting thread, you gets what you pays for.
I have a decent vice on my mill backed up with a small 34 mm machine vice from Arc Euro which is very nice…
**LINK**
I aim to get a larger 70 mm type 2 for my mill.. eventually..
. No doubt other members will offer their comments, good hunting.
George.
p.s. usual disclaimer applies.
Edited By mechman48 on 09/05/2020 17:16:50