Holding small parts on the bench, mill, drill press or band saw is a bit risky.
This is not a new tool at all just my version of the Finger Plate.
Bushings are easily made for drill sizes from the small number drills up to
about 7/16". Anything larger will need a change in design. I only made
a few common sizes now and plan on more as needed.
It would be easy enough to make one using a larger piece of steel and
then providing larger clearance holes and bushing register in the finger arm.
One difference in my version is the addition of the fences on two sides.
This could come in handy for squaring up small parts. The fences are
removable with two FH allens for each fence.
Difference number two is the two piece base. The lower base is detachable with
the removal of four 10-32 allen cap screws. Not only does the base allow
the finger plate to be mounted in a vise but it also allows the use of small
machinist clamps if the vise jaws are less than 3" wide.
The Fp_a series photos detail the finished unit and the finished parts
that make it up. One extra finger arm was made for future use. Only
the center hole and the two 1/4-20 clamping screw holes were drilled.
The clamping holes were also tapped so to be ready for use.
The Fp_b series of photos detail the squared up parts and construction process.
Fp_02 is the main plate with the 1/2" hole for drilling bushing clearance and
a slot has been started for the vertical V groove. The four holes for the 10-32 allen
cap head screws that will fix the lower base to the main plate are counter bored.
Center hole has been drilled and the corner of the 45 degree cutout has been drilled.
Fp_b03 shows the horizontal V groove has been completed.
Fp_b04 is the lower plate that will be used to hold the finger plate in a vise
or just used to lift the plate off the drill press table so machinist
clamps can be used to secure flat parts.
The main plate is shown on top of the lower (vise plate) and "pinned" with a 17/64"
drill bit. Next we will put them in the mill vise and use a piece of paper shim. Now the
# 21 drill bit is used to drill the holes for the 10-32 cap screws in both the top or
main finger plate and the lower (vise clamping plate or base). I used a number 11
drill bit to open up the clearance hole in the top or main plate. When assembly time came I
found a perfect slip fit of the 10-32 screws in the main plate and the alignment
of the top plate holes and vise plate was perfect. Well almost perfect. My granddaughter
reminds me that nothing is actually perfect. Let's just say that the screws all lined up
with their respective threads.
Fp_b07 is re-drilling the horizontal V-groove corner to 1/4" I believe. Just wanted it
a bit larger than shown on the plans.
Fp_b09 is tapping the 10-32 holes in the vise or lower plate.
Fp_c02 is just prior to band sawing out the horizontal V groove. The extra small V groove
can be seen in this photo. I added it for securing small round parts that would not
fill the main V groove.
Fp_c03 is the V-groove cutter I used for the grooving. I think it was a re-purposed
end mill from Dad's old tools. Seems to work great if a slot is cut first for clearance of the tip.
Fp_c05 is the last of the threading. Putting in the 1/4-20 clamping screw threads.
And that is all there was to it.
I am including a file of the drawing that I made for this project. It is a DXF file and the free cad program Qcad can open it. It was created with TurboCad 21.