Adjustable V Block

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Project by Jim Jakosh posted 06-04-2010 01:33 PM 10246 views 55 times favorited 32 comments Add to Favorites Watch

A few years ago I saw this Adjustable V Block in a wood magazine and thought it would be a nice project to build when I had some spare time. So I built one for me and one for my best friend in Illinois but never had an occasion to use it- until yesterday. The v block is for holding a round object of varying diameters and this lamp I had to drill fit that perfectly so I dusted off the v block and set the segments to hold it so the bottom was vertical and drilled the wire hole and the front trigger hole for the lamp.
The v block is made from 3/4” plywood with walnut splines and 3/8-16 threaded rod and a couple of threaded handles for the clamp. The block has 15 layers that are 6” wide and 6.5” high . A llittle WAX on the spines make the segments slide easier( getting all the old dust out does too!!).

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

32 comments so far

View mafe's profile


11638 posts in 3022 days

#1 posted 06-04-2010 01:55 PM

Thats really something. Can I ask a stupid question: what about friction? Do you put some wax or something to reuce that?
Best thoughts,

-- MAD F, the fanatical rhykenologist and vintage architect. Democraticwoodworking.

View Dennisgrosen's profile


10880 posts in 3048 days

#2 posted 06-04-2010 02:27 PM

simple and yet so genius
one wonder why we cuold lieve without it before
little chance in sice and it will bee a hit to be used in the drillpress
thankĀ“s for sharing it Jim


View Woodwrecker's profile


4128 posts in 3509 days

#3 posted 06-04-2010 02:33 PM

My jig & fixture list just keeps getting longer!

Thanks for sharing Jim !

-- Eric, central Florida / Utor praemia operibus duris

View CharlieM1958's profile


16273 posts in 4152 days

#4 posted 06-04-2010 02:35 PM

Wow.what a great idea! What Eric said.

-- Charlie M. "Woodworking - patience = firewood"

View Michael's profile


201 posts in 2931 days

#5 posted 06-04-2010 03:38 PM

Nice, I have interest in building some lamps from old wormy chestnut fence rails. THis should work well, I’m going to make one now

-- "A woodworking project is either a masterpiece or a POS" Dr. Lang

View longgone's profile


5688 posts in 3242 days

#6 posted 06-04-2010 04:24 PM

Slick design and looks like it would serve numerous tasks.

View a1Jim's profile


117032 posts in 3510 days

#7 posted 06-04-2010 04:50 PM

another great jig thanks for sharing

-- wood crafting & classes

View sras's profile (online now)


4765 posts in 3063 days

#8 posted 06-04-2010 05:05 PM

Cool jig!

What I am really impressed with is that you took the time to build a jig before you needed it! I would have waited unitl I needed it, then forgot about the idea and fussed around with blocks or whatever.

-- Steve - Impatience is Expensive

View ZeroThreeQuarter's profile


120 posts in 2991 days

#9 posted 06-04-2010 05:37 PM

really neat little jig.. i don’t see myself needing something like this, but i’m none the less impressed with the idea of this one! nice work

-- Your mind, much like a parachute, works best when open.

View Houtje's profile


311 posts in 2905 days

#10 posted 06-04-2010 05:51 PM

This is a very need jig. Thanks for showing us

View imallchalkedup's profile


393 posts in 2915 days

#11 posted 06-04-2010 05:56 PM

yep, gotta have one now also. Thanks for giving me another project.

-- RStadler

View Bearpie's profile


2601 posts in 2951 days

#12 posted 06-04-2010 07:11 PM

A very simple ingenious fixture that will be very handy to have. I’m favoriting this for a later build. Thanks for posting.

Erwin, Jacksonville, FL

-- Erwin, Jacksonville, FL

View RichardH's profile


295 posts in 2935 days

#13 posted 06-04-2010 08:23 PM

“ah ha”. Another jig I never knew I needed until the moment I saw it. THanks for the post. -Richard

-- "It's supposed to be hard. If it wasn't hard, everyone would do it...It's the hard that makes it great."

View degoose's profile


7228 posts in 3288 days

#14 posted 06-04-2010 08:37 PM

I like it..but I don’t need one just yet..

-- Don't drink and use power tools @

View Jim Jakosh's profile

Jim Jakosh

20169 posts in 3039 days

#15 posted 06-04-2010 09:35 PM

Hi Mafe. I just re read my original note and spelled wax wrong. I do wax the splines to make it slide easier. My fingers are getting sloppy on this keyboard with my old age. I’ll fix the note!

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

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