7x12 Horizontal Bandsaw Vise Thread Repair

[@Halfwheelhell]

This is exactly what I needed! I bought a bandsaw secondhand, and someone put the clamp quick release in upside down. Than you!

[@The4Crawler]

Glad I could help! Not hard to do, it looks like it should go on in that orientation until you realize how it actually works.

[@Halfwheelhell]

@@The4Crawler well, the previous owner had attempted to weld the middle piece of the assembly... so it wanted to be in the upside down! again your video helped me correct the assembly - after a little grinding since welding to cast is difficult it didn't penetrate!

[@The4Crawler]

@@Halfwheelhell Thankfully, I never attempted that sort of "fix" on my saw 🙂

[@billhaneline7498]

My vice would not tighten, or stay tight. Cleaning out the half threads of the nut did the trick! Thanks!

[@The4Crawler]

Glad you got it working. I'm about ready to clean mine out again, those half threads tend to gunk up every few years, depending on how much you use the saw.

[@RoboDriller]

I cleaned mine and greased the threads Would not work with greased threads. Cleaned it all up again left threads with no grease and works good now

[@The4Crawler]

Good to know, thanks for sharing. I guess I've never lubricated mine to find that out. I suspect that half-nut "jamming" design relies on friction to work.

[@RoboDriller]

Wtf! Just shmootsy in the threads causes it to not tighten. Outstanding. Now to get the coolant to stop splashing everywhere and drain to the tank nicely!!

[@anxietyislandllc]

Thanks for posting this! Been looking for a solution to this problem! 😁🤙

[@The4Crawler]

Glad to help. Reminds me that mine is about due for another thread cleaning.

[@oldtimeengineer26]

you take very good care of your equipment Merry Christmas and Happy New Year

[@The4Crawler]

Seasons greetings as well. Yes, constant maintenance required on these tools. I used anti-seize on these threads but given enough time, a steel bolt into cast iron threads is going to wear them out. Since I do lots of angle cuts, that clamp bolt gets wrenched a lot.

[@PaulOnTheRun]

Do you happen to know what that part is called that you cleaned for the clamping mechanism? I cleaned mine out thinking there was a lot of debris and there was but even after cleaning and putting back my clamp still won’t tighten. TIA.

[@The4Crawler]

I think they call it the Acme Nut Assembly on the parts diagram in the manual. Likely the little spring loaded pin is stuck or the nut is installed backwards: kzbin.info/www/bejne/e2fPkISrq8yDras Easy way to tell is to push on the back of the moveable vise jaw and try to turn the lead screw out. If the nut locks up as you try to open the vise, turn it around.

[@geraldtkli]

Hi, any idea what could be wrong with a vice that is slipping? The metal piece secures tightly at first, but as soon as the blade touches the metal piece the vice disengages.

[@The4Crawler]

It could be the threads inside the half nut are packed with debris: kzbin.info/www/bejne/e2fPkISrq8yDras

[@jeffthompson5690]

Any idea the size and thread pitch of the left hand acme lead screw? I HATE this stupid design; any advantage in quick release is offset by the fact that it never tightens up adequately....I think the pin may be too short to ever lock up tight. Anyway...looking to just change to a coupling nut of the right size/pitch, but can't get a decent measurement.....can't tell if it's metric or SAE; only that it's left hand. Size seems to come out to 20.5-21.5mm or 13/16" with 5 or 6 threads per inch. McMaster-Carr only carries LH acme thread in SAE....nothing metric, so hopefully it's SAE.

[@The4Crawler]

Usually that's caused by junk filling the half threads in the nut, try cleaning that out and it'll work like new: kzbin.info/www/bejne/e2fPkISrq8yDrassi=vWAFRULqHsHEDwd5 Grizzly lists the lead screw as 22x5, 480mm long, they sell replacements: www.grizzly.com/products/g0561/parts Another option is to flip the existing lead screw end of end. You'll need to turn down the other end and mill a keyway slot in it to fit the hand wheel. But that will give you nice square threads on the pushing side if your old threads are worn (like mine are).

[@jeffthompson5690]

@@The4Crawler Not in this case as the nut has been totally cleaned out.....however, mine is the Harbor Freight/Central Machinery saw, not the Grizzly...so that may be the problem. My saw is fairly new and not used much. Thanks for detailing the size/thread pitch. HF's owner's manual didn't list the size at all....and obviously, it may not be the same as the Grizzly. The pin definitely isn't as long as the one in your video which is probably why it doesn't lock the threads of the nut against the lead screw correctly. I don't have a mill or lathe to make the parts either....so I may have to improvise in another way. Thanks so much for the extremely prompt response and the video itself was very helpful in disassembly.

[@jeffthompson5690]

@@The4Crawler Also, are you the same 4Crawler Offroad that makes axle shims? If so, small world! I've bought shim from you in the past! 😃

[@The4Crawler]

@@jeffthompson5690 Yes, we cut the shims on that band saw.

[@The4Crawler]

@@jeffthompson5690 Mine is also HF brand, I order parts through Grizzly because they have much better parts ordering than HF. HF told me they no longer make my model saw (its around 20 yrs old) and have no parts. These saws, HF, Grizzly, Jet, etc. are all basically identical mechanically, aside from some cosmetic changes. Should be able to make a longer pin for yours, just find a bolt of the same diameter and cut off a section of the unthreaded portion to the desired length. A stainless bolt would be best if you use a water based coolant.

[@michaelc3172]

Great video.i just bought a saw with that problem.do you know the brand.my saw looks exactly like yours and I like to find the manual

[@The4Crawler]

It's a Central Machinery #34272. You can download the manual from the Harbor Freight web site. The newer model looks different, but I think all the mechanical/electrical parts are similar.

[@michaelc3172]

They only have the new saw instructions .and that's enough.but , can you tell me the blade size. They say 93 3/8 x 3/4.. harbor freight says 93" x 3/4..and they don't have a spot on the wall for either size.

[@The4Crawler]

@@michaelc3172 I use 3/4" wide x 93" long and usually 0.035" thick. I get my blades from McMaster-Carr. The 10-14 tooth bi-metal blades work very well for steel and aluminum.

[@michaelc3172]

@@The4Crawler thank you