V notch in vise jaws

[PoorOwner]

Is that for holding a hex nut or bolt?

They seem so shallow and i have to wonder if it is any better than just clamping the flats of a fasterner.

 

[SweetD]

Typically for holding a rotational / cylindrical workpiece. It definitely works well, but is not totally necessary...

 

[zkling]

Typically for holding a rotational / cylindrical workpiece. It definitely works well, but is not totally necessary...

Although I'd argue it is necessary. So handy for when you need to chop off the end of a ~1/4" shaft with a hack saw. Or drive a pin out of a round object.

When you clamp a round object with flats..In theory there is only one line of contact on each side. Factoring in that it is unlikely to have full contact along that line, the clamping ability reduces. Adding a V ensures that you have at least two clamping contacts on one side to add stability.

 

[AceofSpad3s]

Although I'd argue it is necessary. So handy for when you need to chop off the end of a ~1/4" shaft with a hack saw. Or drive a pin out of a round object.

Agreed, especially with vises that have crappy teeth. I have a small exposed screw columbian on a wall mount bench that has bad teeth (very shallow and very few teeth) that slips a lot when it comes to cylindrical objects. With nicer vises it is not an issue with me, my wilton 9400 has very nice teeth so they grip very well.

 

[PoorOwner]

The groove is like 3/16" though, are we talking about it gripping larger cylindrical objects or more like a drill bit size ?

 

[alfagarage]

Just used mine yesterday to hold the valves of my champion air compressor to get out stuck screws that hold halves together so I could clean and lap them.

If I would have used a serrated jaw they would have had marks I would have had to clean up, but with notch no marks and did not rotate with use of hand hammered impact.

It was in a drill press vice. I would like them in a bench vise as well but none of mine have this feature.

 

[Dennis Leigh Henry]

The V notch serves the same purpose as a V-block common to tool and die making circles.. They provide 3 point contact to prevent slippage out of position, to the extent clamping pressure is able to overcome the pressure being applied by the "work" applied to the work-piece.

View media item 55901
View media item 55900
View media item 55905
View media item 55904

 

[Davefr]

What type of vise?

I wouldn't own a drill press vise without the V notches. (one horizontal and one vertical)

 

[uart]

What type of vise?

I wouldn't own a drill press vise without the V notches. (one horizontal and one vertical)

I'm glad someone finally asked the question Dave. Are we talking about regular bench vises here or drill press vises?

From what I've seen most drill press vises have a V-notch (usually one vertical and sometimes also one horizontal), but most of the regular bench vises I've seen don't have them.

 

[Dennis Leigh Henry]

Here are some more pictures of my v block apps, first two are in a normal vise (with and without the work-piece pad / v block; note the pipe vise jaws below the main vise jaws in the second picture that serves the same purpose as a v block for pipe / long round objects) and my drill press vise with both vertical and horizontal v block notches..

View media item 55902
View media item 55903
View media item 55906

 

[anndel]

It's used to hold something round or cylindrical like pipe, re-bar, screws, etc.

 

[dkroth]

My old homeowner grade (but USA!) Craftsman had two of these notches. Very convenient. I have considered cutting notches in my Wilton jaws but have balked due to the cost of the jaws in the likely event I fck it up.

 

[KMScott]

I made a pipe jaw holder for a 600 Wilton a while back. I thought it might be a OK jaw to have but kind of a pain to change if you need a pipe jaw. Still leaves a mark on the bar since the other side has serrations. Better to have a vise made for bars or pipes. Nice equipment Dennis Leigh Henry, wish I had a Shaper like yours.

 

[PoorOwner]

I took pictures of the jaws in question, is the second one for nuts as it is quite shallow depth wise?

I almost think the 3rd one is for liquid to drain through.

 

[zkling]

I took pictures of the jaws in question, is the second one for nuts as it is quite shallow depth wise?

I almost think the 3rd one is for liquid to drain through.

They are indeed for vertical work of round stock. They are offset to allow long pieces to hang down and yet clear the slide. Every hex I've ran into has 3 sets of parallel opposing faces to be clamped in flat jaws or say the open end of a wrench

 

[PoorOwner]

What brand, size, and model # of vise is that in the third photo?

It's a Yost 880-DI 8"

 

[Dennis Leigh Henry]

I took pictures of the jaws in question, is the second one for nuts as it is quite shallow depth wise?

I almost think the 3rd one is for liquid to drain through.

The red one (second picture) is probably for pipe and similar large diameter round objects. The other two vises are mean to help with round (primarily) stock location or any other odd shape that won't stay put in the regular vise jaws..

 

[MikeF2316]

Not only does it hold the cylindrical piece better, it's also easy to put the piece in so it's square to the jaw.

 

[Caman]

I have considered cutting notches in my Wilton jaws but have balked due to the cost of the jaws in the likely event I fck it up.

Make a set of soft jaws out of aluminum, brass, or even mild steel. Swap them out when needed.

Back in my toolmaker days I made many sets of soft jaws for machinist vises when I needed to hold something special.