Screw looks past rescuing ..........probably a standard acme thread ,and the handle and outer part wernt submerged in dirt,fortunately.
Forget which thread I heard this on, but good, old style jute twine makes a great dental floss for the teeth on big vise threads. Wrap it around and pull tight, spin the handle. Add a solvent if greasy.It's 90% dirt
I've already knocked a ton of it out.
I've tried lots of methods over the years for cleaning old vise parts, dried grease on leadscrews, etc.Forget which thread I heard this on, but good, old style jute twine makes a great dental floss for the teeth on big vise threads. Wrap it around and pull tight, spin the handle. Add a solvent if greasy.
Works for any big thread, did my drill press vise a few weeks back, and a 6” C clamp last weekend.
Don't have access to it anymore (different job) but I prefer to sandblast. Fastest and most thorough method I've tried so far.I've tried lots of methods over the years for cleaning old vise parts, dried grease on leadscrews, etc.
In the end I just got another bench grinder, took the guards off and mounted a sacrificial wire wheel for like $8. I'd never go back.
I had that. Between buying all the ****, the compressor, the less than ideal set up at home, never again.Don't have access to it anymore (different job) but I prefer to sandblast. Fastest and most thorough method I've tried so far.