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Construction of the
Saint Artemas combat arrow nock begins with the purchase of 1 1/4 inch
diameter ramin wood doweling. This Asian hardwood is an inexpensive and
dense wood readily available at most home improvement centers and hardware
stores. The milling processes below are relatively simple but requires
the use of a 10 inch table saw, several dado blade and milling sets, and
a 10 inch carbide-tipped saw blade that makes a 1/8 inch wide cut. Also
needed is a disk or belt sanding machine, a drill press and a few hand
tools. There are several milling jigs that were manufactured before large
scale production could begin, though small batches could be done a little
more crudely by hand by a skilled woodworker without them.
Milling Jigs Used
Four jigs were constructed to facilitate accurate milling. While all the
required cuts could be made by hand, doing so can be an imprecise and
potentially dangerous milling process. The dowel is difficult to hold
in the proper position by hand and it can easily twist slightly making
for a wider notch than intended. A hand-milled nock will also lack the
smooth curving cut that permits the bowstring to fit the nock when drawn,
allowing for a more uniform pressure on the arrow as it is propelled forward
at its release.
The first jig used was a vertical board made to slide in a frame above
and in line with the saw blade and was used to make the string notch.
The entire jig frame was wedged to the saw’s fence. A block was
cut from 2x4 approximately 10 inches long, and a groove milled along its
long axis and centered 1 inch deep by 1 1/4 inch wide. This cut was made
such that the doweling will fit snugly in place during milling. A 1/4
inch pivot hole is drilled in the center of the groove 1 inch from the
end of the block and counter-sunk to fit a 1/4 counter-sunk bolt. A matching
1/4 inch hole in the block mounted on the plywood index 1 1/2 inches above
the plywood surface. The end of the pivoting block needs to be cut in
a curve sufficient to allow it to clear the deck of the plywood without
catching. Two small stop blocks were mounted on the vertical sliding deck
in front and behind the pivoting block at roughly 45 degree angles from
the vertical to start and end the stroke when cutting the nock groove.
Lastly, a small block was mounted on the milled, 1 1/4 inch grooved pivot
block to serve as a length guide for the dowels as they are milled. This
small block protrudes only 1/4 inch across the end of the groove to provide
a ‘shoulder’ to hold the ramin wood dowel length the correct
height above the saw blade. Bolt the pivot block to the block mounted
on the index deck with the 1/4 bolt. Ramin wood doweling varies slightly
in diameter. Layers of duct tape were used to pad the groove to insure
the dowel was seated firmly in place and centered over the saw blade.
A 10 inch diameter carbide-tipped saw blade was used to make the 1/8 wide
notch.
A second jig was made to mill the finger grooves on the sides of each
nock. The jig base was made by mounting two index strips on the bottom
of a small piece of 1/4 or 3/8 inch plywood. On the top of this base,
two 3/4 by 1 inch strips, roughly 6 inches long, were mounted perpendicular
to the saw blade 1 1/4 inches apart (or so the dowel will fit snugly).
A fence block was also mounted parallel to the saw blades 1 1/4 inches
to the left of the left edge of the milling dadoes. This served to put
the 1 inch finger groove at the correct distance from each end of the
dowel. A specialized milling head, mounting three blades 1 inch wide with
a 1/4 inch curve on the exposed corners, was mounted on the table saw.
The milling head had to be set so it would cut a groove approximately
3/8 inch deep into the sides of the nock. In the fence block, a 1/8 inch
cut was centered vertically. Inserted into this cut is a 1/8 wide metal
strip to index into the previously cut string nock. It protruded 3/16
of an inch so the nocks will lock firmly in place. The jig has a groove
cut in the deck to allow the milling head to run in far enough to make
the finger groove. A stop block on the back end of the jig hangs over
the saw’s deck to keep the jig from being pulled back to far on
to the milling head when the jig ws pulled back into its starting position.
A third jig was made to cut the 1/8 inch deep rabbet to fit the inside
diameter of the siloflex tubing the nocks will be mounted on. This jig’s
base was the same as the base of the second jig. A fence block was mounted
2 1/4 inches from the right edge of the 3/4 inch dado heads mounted on
the table saw. Two perpendicular guide blocks are mounted to the jig base
to hold the dowel to be milled firmly in place. The space between these
two perpendicular guides needs to be exactly centered at the top of the
dado heads when against this stop block. The jig deck was cut out just
enough to allow it to be dropped over the dado heads such that they protrude
1/8 inch above the jig deck, but still clear the dado blades at their
highest point. A stop block to the rear jig to allowed it to move only
a short distance on to the dado heads from the front. A dowel with a 1/8
inch metal index across the end was made long enough to allow it to reach
off the left side of the table saw’s deck. This is used to rotate
the dowel piece as it is cut all the way around the middle of the dowel.
A hinged, fitted ‘feather’ or guide was mounted so it would
clamp the dowel in place while allowing it to be rotated on it axis while
centered at the top of the dado cut. The dowel was then removed and rotated
end-for-end to make a second dado cut.
A fourth jig was made to hold the cut nocks vertically for drilling. The
hole drilled is ‘stepped’ to give the maximum lightening of
the nock without compromising its strength. A special drill was made to
drill a 1 inch lower portion of the hole at 3/8 inch in diameter, with
an upper portion for another 1 inch at 5/8 inch in diameter. The jig consists
of a 2x4 inch block roughly 6 inches in length anchored to a base made
of plywood. A vertical hole was drilled into the 2x4 1 1/4 inches in diameter
to hold the nearly completed nocks vertically. As the diameter of the
ramin wood varies slightly, even on the same dowel, a 3/4 block of pine
was also drilled to 1 1/4 inches and a 3/64 inch slot cut into the hole
along the grain to provide a relief. The two blocks were screwed together
with the 1 1/4 holes aligned. A small ‘C’ clamp was placed
so it could squeeze the gap 3/64 gap closed in the 3/4 inch block to clamp
looser nocks firmly in place. Then the entire jig was clamped on the drill
press table, with additional ‘C’ clamps, and carefully aligned
so the stepped hole would be drilled exactly centered. The depth of the
hole was set by drilling a 5/8 inch hole through a small block of wood
that was slid over the stepped drill bit so the hole could not be drilled
deeper than the required two inches with the bit inserted up into the
chuck as deeply as possible.
Rough Cutting the Dowels
The milling process is begun by cutting the dowel stock into 5 7/8 inch
long sections. Pieces shorter than 5 7/8 inches in length were put aside
for milling at only one of their ends.
Milling the Nock Cut
Using jig one, insert a 5 7/8 inch long piece of ramin wood stock in the
pivoting block firmly against the stop block in the groove with the grain
of the wood perpendicular to the axis of the blade. Holding the dowel
firmly, run the vertical sliding deck of the jig into the blade until
you hit the 45 degree angle stop block at the back of the jig frame. Pivot
the block forward to the 45 degree angle block at the front of the jig
to complete the curved nock cut. This pivoting motion creates a curved
cut that neatly fits a bowstring. Back the jig out of the blade far enough
to safely remove the 5 7/8 inch dowel from the pivot block. Reverse the
dowel (turn it end for end) so you can make a cut in the opposite end
across the grain. Set the dowel aside and cut two grooves in the ends
of all your 6 inch dowel segments. Lastly, carefully cut any dowel pieces
shorter than 5 7/8 inches such that they get the 3/8 inch deep curved
groove in one end of each short dowel.
Milling the Finger Grooves
Mount the three-bladed milling head for the finger grooves on the table
saw. Set the height of the milling head to make an approximately 3/8 inch
deep groove. Using jig two, insert and index the previously cut nock groove
on to the jig. Run the cut into the milling head to the stop and pull
it back to a safe distance. Remove the 5 7/8 inch dowel stock, turn it
over and reindex it into the jig. Run the dowel back over the milling
head until you reach the stop block. Pull the jig back again to a safe
distance. Remove the dowel stock from the jig and reinsert it so as to
cut both grooves the opposite end. Once you complete all the full length
dowel stocks, run the one end of those dowels that are short.
Cutting the Rabett
Using jig three, insert the dowel stock across the dado head cut with
the dowel firmly pushed up against the right-side stop block. to begin
you rabbet and then rotate the dowel a full 360 degrees to complete it.
A second cut is made working from the opposite end to complete the rabbet.
For short piece being made into a single nock, make only one rabbet cut
on the dado heads. As there isn’t a second notched end to index
on while pressed up against a fence, insert a spacer block of the correct
length so the rabbet is cut at the correct distance from the notched end.
Please note: If the nocks are being made to mount on golftubes, skip this
step completely.
Cutting the Milled Dowel Stock into Nocks
The 5 7/8 inch dowels are now ready to be split into two nocks. Using
a table saw and index, or a crosscut or chop saw, carefully cut the milled
dowels in the exact center to split them into two separate pieces. Short
dowels are cut to length matching the length of those that are split into
two.
Drilling the Nocks
After cutting the nocks into individual pieces, each one is placed in
jig four. The separated nock pieces are inserted into the fourth jig with
the rabbet end up. The clamp is opened and closed as needed to hold the
nocks firmly during the drilling process. The stepped drill is run down
until the block covering the bit bottoms out against the end of the nock.
Finishing the Nocks
The nocks now need to be chamfered around the back end to provide a roughly
45 degree angle, approximately 1/8 inch wide across the finished face.
This is to reduce the potential protrusion into face grills and to eliminate
a sharp corner. This is done on a belt sanding machine by hand.
The nock cut is also hand finished by cutting the corners off the end
of the string notch with a chisle or utility knife.
Nocks that are to be mounted on golftubes are not rabetted. Golftube nocks
are instead tapered at the tube end so they jam into the golftube approximately
3/4 of an inch. A sanding machine is used to slightly taper the completed
nock so it can be easily started on to a golftube.
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