KMScott
Well-known member
The pictures below are of a Prentiss 518 that I picked up from a metalsmith who was downsizing. It was in his possession for at least 25 years, and he claims that it was as crusty when he got it as it is now.
It works great, AFAICT (I haven't put any really force on it yet since I don't have a mount, but I have reasons to trust the dude who sold it to me). Anyways, I'd like to pretty it up some and ideally make it my go-to big-girl vise. The first order of business is wire brushing (any reason to go with brass instead of steel?) to get the flakes off, then probably an evaporust or electrolysis bath for the rest of the rust.
I'm considering boiled linseed oil for the finish, but there are things I'd rather not use my oven for, so it will probably be paint on all the non-friction surfaces, some sort of oil everywhere else.
My big question though is the static jaw. Is there any reason why I should risk trying to get the jaw off and welding/brazing the "ledge" to rebuild those pits? If I went that route, I'd probably also plan on milling/heat treating new jaws, which I don't wanna do (I'd rather not buy replacements either).
So, I'm really leaving towards to just cleaning the non-structural stuff up and putting her back to work. What say you, vise wizards?
If this is going to be your go to big girl vise then why are you saying should I fix this vise. You are posting in a vise repair thread. Putting a set of copper jaws to hide the damage is doing just that. I have repaired many vises with this mentality. You will shorten the vises's life very quickly. The copper jaw caps are made to grab workpieces that you do not want idiot marks all over your part. Copper Caps are not replacement jaws. That vise needs a doctor before it should ever be used, no way around it. Yes pull those jaws off and mount the vise in a mill and machine back the broken chipped area and create a new boss area so a new set of jaws can be mounted. The jaw drawing shoul give you the numbers you need. Putting a new set of jaws on is not just spiffing up your vise. It is having a vise that clamps on work pieces with flat and parallel jaws. Your vise will hold your work without it moving or slipping like it was designed to do. I added a drawing of jaws that should fit that abused vise. Make a set, fix that vise or give it to someone that can fix it.
You do not need to use a oven for BLO, just takes longer to set up. But it is getting warmer now and a few days in the sun will set up your BLO.
to everything KMScott has said. Cosmetics and useability for serious work are 2 different goals.

