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Project by kiefer posted 03-09-2014 09:29 PM 8257 views 37 times favorited 18 comments Add to Favorites Watch

Here are a couple of sketches I drew up to show the internal locking mechanism of the Kiefer Leg Vise
I hope you can understand the concept from this a little better and it is the best drawing I can come up with but I wish someone could do this in SKETCHUP .
Here is a little explanation of the locking action.
When the pedal is starting to get pressed downward the lift rod gets pulled forward by the chop to which it is attached to and rides upward on the ramps and onto the top of the ball bearings which are bolted to the lower beam . This action lifts the wooden lock rod upward and the half nuts which are attached to the lock rod engage into the threaded rods and lock up the vise .
The chop is free to travel to the required pressure and the lift rod just follows along unrestricted
The pedal arm is fitted with a cylindrical steel end and engages in between a row of cylindrical steel rolls giving a sort of ratchet action
Upon releasing the foot pedal the spring on the upper beam pushes the chop open and also pushes the lift rod backwards letting the lock rod disengage and let the beams move freely .
NOTE: There is a spring not shown in the sketch .The spring is located at the top of the lock rod and provides downward pressure when the pedal is released .
The locking mechanism is covered by a removable cover to have easy access to the mechanism .
A very simple mechanism that looks somewhat complicated at first because the complete vise is in this sketch .
I hope this is a sufficient explanation but if there are questions please ask .
Also watch the video in my previous post.

-- Kiefer

18 comments so far

View DocSavage45's profile


8881 posts in 3443 days

#1 posted 03-09-2014 09:56 PM


Looks like the way I sketch…no ruler. LOL! And I was trained in mechanical drafting waaaaaay back! I think you have something here. I do have a problem as my eyes need stronger lenses. I’m sure we have someone who can do a sketch up. Then it can be downloaded by email to avid admirers.
Actually helps make it clearer. Thanks!

-- Cau Haus Designs, Thomas J. Tieffenbacher

View JL7's profile


8762 posts in 3566 days

#2 posted 03-09-2014 10:07 PM

Again, this is really an amazing bit of engineering. Thanks for sharing!

-- Jeff .... Minnesota, USA

View shipwright's profile


8452 posts in 3399 days

#3 posted 03-10-2014 12:59 AM

Even knowing what I was looking at it took a bit to fully understand it but now that I do…...
Brilliant. ...... all I can say.

-- Paul M ..............the early bird may get the worm but it’s the second mouse that gets the cheese!

View MacSteveT's profile


55 posts in 3294 days

#4 posted 03-10-2014 01:33 AM

Kiefer – Thank you so very much for sharing your creativity and ingenuity with us!

I will gladly draw this in SketchUp and share here on LJ!!. I will PM you with some specific questions about the pedal / ratchet / ramp construction – that is the part that I am having a hard time visualizing.

PM to follow shortly,

Steve T.

-- "Do, or do not. There is no try." ~Yoda

View Richard's profile


11309 posts in 3634 days

#5 posted 03-10-2014 01:39 AM

Very Nice!

-- Richard (Ontario, CANADA)

View CFrye's profile


10819 posts in 2440 days

#6 posted 03-10-2014 06:29 AM

Kiefer, thank you for the diagram and the videos. I’m gonna study on this and will favorite it! Thanks for sharing.

-- God bless, Candy

View kiefer's profile


5713 posts in 3268 days

#7 posted 03-10-2014 01:37 PM

Thank you for taking a look and I hope this adds more to the explanation of hoe this vise operates .

-- Kiefer

View hoss12992's profile


4165 posts in 2494 days

#8 posted 03-10-2014 11:55 PM

Awesome! Thanks for the sketch and videos. Very much appreciated

-- The Old Rednek Workshop

View Mikhail's profile


48 posts in 2292 days

#9 posted 03-11-2014 01:27 AM

I am REALLY looking forward to see the Sketchup for this amazing design! Thank you so much Kiefer! I can’t wait to see what MacSteve comes up with.

I know there is a half nut/threaded rod relationship that disengages via a ramp…but for the life of me, I can’t picture it yet. Hmmm.

View MacSteveT's profile


55 posts in 3294 days

#10 posted 03-11-2014 02:45 AM

Another LJ’er beat me to punch volunteering to work with Kiefer on a SketchUp plan for his leg vise. Looking forward to seeing the details!


-- "Do, or do not. There is no try." ~Yoda

View Greg D's profile

Greg D

238 posts in 2552 days

#11 posted 03-11-2014 04:52 AM

Thanks for sharing in more detail!

-- Greg D, Cen. CA, "Keep it on the Level, Do it Right the First Time!"

View stefang's profile


17034 posts in 3935 days

#12 posted 03-13-2014 12:27 PM

Thanks much for the diagrams Klaus. I will have to study them awhile to fully understand the design, but your effort on this is much appreciated.

I am planning to make a new planing bench to replace the one I now have and I will have to see how your design can be used with it. My present bench is a Sjoeberg with a very narrow top and a tool well at the back. I hate the tool well and the top is way too small, so I am looking forward to making something more useful, and all the better if I can able incorporate your vise design into it.

-- Mike, an American living in Norway.

View wolfman's profile


2 posts in 3276 days

#13 posted 03-13-2014 04:53 PM

I like the concept, but it seems to require your foot to be on the pedal to stay closed, if I read it right. It would be helpful to have a latch to hold it for planing or to get into a better position. Correct me if I’m wrong. Nice work, though.

View CFrye's profile


10819 posts in 2440 days

#14 posted 03-13-2014 08:12 PM

Wolfman, Kiefer made a video here that demonstrates the vise in action, including the locking mech.

-- God bless, Candy

View Jim Jakosh's profile

Jim Jakosh

23740 posts in 3706 days

#15 posted 03-14-2014 05:27 PM

Hi Kiefer. Nice leg vice. That is how I draw things up too. It works for me!!...........Jim

-- Jim Jakosh.....Practical Wood Products...........Learn something new every day!! Variety is the Spice of Life!!

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