A Precise Table Saw From an Electric Hand Saw

7/31/2019 A Precise Table Saw From an Electric Hand Saw

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A Precise Table Saw from an Electric Hand Saw

step 1Making the miter gauge

This is a good time to decide on the miter gauge you will use with your saw, and make or buy it. When I

made this table saw conversion, I purchased a commercial miter gauge. The steps that follow will showyou how to make a good miter gauge yourself.

If you choose to make your own, begin with a straight steel bar. The one shown is 1/4 x 3/4 inch and

about a dozen inches long. It is what I had at the time. I would recommend a bar of 3/8 x 3/4 inch steel

about 18 inches long, but 1/4 x 3/4 inch may be easier to find and works well, too. Round the edges at

the ends a little with a grinder so the miter gauge moves more freely in the slots. The photos in this step

and the next steps are from my previous Instructable titled Bench Saw Table for a Lathe.

step 2Drill holes

Drill two holes for 1/4 x 2 inch screws. Make the holes 2 1/2 inches apart at the center. Countersink for

the bevel heads.

http://www.instructables.com/id/Bench_Saw_Table_for_a_Wood_Lathe/





step 3Attach the bolts

Use lock-washers and nuts to secure the bolts in place.

step 4The rest of the miter gauge

Cut a disc from 3/4 inch plywood that is 2 7/16 inch in diameter. I turned it on my lathe, but a bandsawor jigsaw will also do the job. Slice away nearly half of the disc, but leave the center. Drill a 1/4 inch

hole on center. Countersink the hole for the nut and washer. Glue and/or screw a face piece onto the

disc. Glue on some fine sandpaper, if desired, to prevent work slippage on the face of the miter gauge.



step 5Finish the miter gauge

Assemble the miter gauge. Make a piece of 1/8 inch strap iron to fit as shown in the photo. Use a self-

locking nut (with nylon insert) at the center pivot. Leave it just loose enough that the miter gauge can

be adjusted easily. Place a wing-nut on the other bolt. Instructions for adjustment of the miter gauge

will be given in a later step.

step 6Table top

Now make the top for the saw table. I used 3/4 inch A-D fir plywood. A piece 24 x 36 inches is about

right. (I no longer have the table saw I made, so I am using some images I made with Google Sketch-Up.)



step 7 Opening for the blade

You need more table in front of the blade than behind the blade. Cut an opening for the blade to come

up through the table, but leave enough table behind the blade for clamping the rip fence and for a saw

base.

Notice that the opening has a bevel on the left side. That is to accommodate the blade's position when

the saw is set to rip a 45 degree bevel. Keep the blade opening as small as possible so scrap pieces do

not fall down into it.

This design sacrifices 3/4 inch of cutting depth due to the thickness of the plywood table. Most of the

time you will be cutting materials no thicker than 3/4 inch, so less than maximum cutting depth is not a

problem. When I had to cut a 2 x 4 (1 5/8 x 3 5/8 inches), I simply turned it over after the first cut and

made a second cut. It would be possible to mount the saw below a piece of steel plate. The details on

that would require quite a few more frames in this Instructable and will not be covered here.



step 8 Miter gauge slots

You need to cut two slots for your miter gauge. They should be equidistant from the upright blade on

both sides of it. The slots should fit the bar of steel you use for your miter gauge so that it slides easily,

but without looseness. The two slots must be exactly parallel to one another.

If you can borrow a friend's table saw, cutting slots for the miter gauge is easier, especially if he owns a

dado blade attachment. An alternative method is shown in the next steps.

step 9Cutting the slots

Set the saw's cutting depth to the thickness of your miter gauge's steel bar. Clamp a straight edge

across the saw table. Here I used a framing square. Accuracy will be improved if you can leave the



square undisturbed while cutting both slots. This involves using some shims. See the next step. (The

photo is from an earlier Instructable I did titled Bench Saw Table for a Wood Lathe.)

step 10Making a shim

The first shim needs to be the width of the steel bar on the miter gauge minus the thickness of the

blade. Notice the red line. It aligns the left side of the bar with the left side of the saw blade's teeth.

The temporary fence shown is clamped to the saw base so that the face nearer the blade's teeth aligns

with the right side of the steel bar. The green arrow indicates the width of the shim needed.

Remove the steel bar. Turn the saw right side up and rip your shim from a straight piece of wood while

holding the fence against the wood. Make the shim as long as your saw table is deep.







step 11Cutting a miter slot

The shim from the previous step needs to be rather precise. Make a test slot on some scrap wood

before cutting on your saw table.

Make one cut with the base of the circular saw riding against the straightedge (first graphic). Then make

a second cut with the shim against the straightedge and the saw riding against the shim (second graphic-

-The brown piece is the shim. Note the second cut to the left of the first cut. Thanks to Google

Warehouse for the image of the circular saw. The image happens to show a left-hand drive saw,

although most home circular saws are right-hand drive.). Make some freehand cuts to remove as much

of the waste material between the two cuts as possible. Make the bottom of the slot smooth with a

chisel or a rasp. Check to see how the steel bar from the miter gauge fits in the slot. Rub some paraffin

in the slot to make the miter gauge slide more easily.

If the shim produces a test slot that is a little too narrow, cover one edge of the shim with a layer or two

of black electrical tape and make another pass with the saw. If the test slot is a little too large, sand or

plane the shim to narrow it a little.



step 12Make a larger shim

The second slot should be at least 12 inches off to the side of the first slot. You can make your own shim

to offset the slot, or you can buy something that is reasonably certain to have parallel edges, like a piece

of shelving. After the first cut for the slot has been made, use the smaller shim to cut the outer edge of

the second slot, just as you did on the first slot. This allows you to leave the square undisturbed and

gives a greater probability both slots will be exactly parallel to one another. (Note that this drawing is

not to scale. The width of the shim (shown in shades of brown) in this graphic would be much greater

than shown so that the second set of cuts would be much farther away from the first set.)



step 13Mounting holes

I used two 1/4 inch bevel head screws to mount my saw. Countersink the heads so they are just below

the surface of the saw table's top surface. Many circular saws will already come with two holes in the

base. If your saw does not have these holes, you can drill your own mounting holes. Just be careful that

the ends of the screws do not obstruct anything essential. Wing-nuts and lock-washers are adequate for

securing the saw under the table.

step 14Temporarily mount the saw

Once the mounting holes for the saw have been drilled, mount the saw under the table and do some

preliminary alignment of the blade to make it parallel with the miter slots. This is a necessary

preparation for what needs to be done in Step 16. The miter gauge will be a key part of this preliminaryalignment. Do not worry that there are no markings on the miter gauge as there are on a protractor,

nor any positive stops. Set the miter gauge adjustments with a square. Later, if you need to cut at an

angle, set the miter gauge with a "T" bevel angle finder.



step 15Preliminary alignment

When checking the saw for alignment, place a square against the miter gauge and slide the other leg of

the square against the saw blade. (The photo is from my earlier Instructable titled Bench Saw Table for

a Lathe.)









step 16Built-in micrometer-like precision

In the previous step you aligned the saw so it is fairly well as it should be, but it still needs some

tweaking.

Plans for saw conversions similar to this one were frequent in how-to magazines from the 1950's and

1960's. But, they all lacked a very useful feature, which was a positive way to align the saw and keep it

aligned, even if it had to be removed for ripping a panel or otherwise being used as a hand circular saw.

I solved that problem with two 3/4 x 3/4 inch blocks mounted under the table at one side of the saw's

base plate. The blocks are about 2 inches long and are glued or screwed to the underside of the table.A tightly fitting machine screw passes through a hole in each block and the tip rests on the edge of the

saw's base at the front and the back of the saw's base. (See the two additional photos with this step.)

Turning one of these screws in or out part of a turn aligns the saw with micrometer-like precision so the

blade is exactly parallel to the miter gauge slots. You know the saw is aligned when the rear of the blade

does not kick up chips, splinters, and sawdust while you are ripping a board. When I needed my saw for

another job, I could remove the mounting bolts and take the saw with me in just seconds. Later I could

attach it loosely with its mounting bolts, slide the base against the tips of the machine screws, and finish

tightening the mounting bolts. The saw was perfectly aligned again. (I demonstrated this basic feature

in another application. See my Instructable titled Radial Saw Table Alignment--An Easier Way.)

http://www.instructables.com/id/Radial-Arm-Saw-Table-Alignment-An-Easier-Way/






step 17Add a base

The base for the table adds strength and rigidity to the table, especially since it has been weakened by

the two miter gauge slots. The base also provides a housing for the circular saw and keeps your hands

away from it. The front is not fully open because extra support for the saw table is needed across the

front. The opening makes the saw accessible for adjustments and changing or removal of the blade. A

power switch can be mounted on the front or the side near the front. You may also want to make an

opening at the rear of the base for better access to the adjustment for cutting depth.

I added legs under the base. I also added 2 x 2 inch pieces under the front and back of the saw table to

extend off to the right so I could saw pieces up to four feet wide. See the photo in the Introduction.



step 18Setting the rip fence

Use a square against the face of the miter gauge to place and align the rip fence. The miter gauge can

be inserted backwards to gain extra clearance with the blade, if necessary.

I used a piece cut from the end of a sheet of plywood for my rip fence and clamped it to the front and

back of the saw table with "C" clamps. ("G" cramps in the UK) My rip fence was about 4 inches wide.

The factory edge on a sheet of plywood is very straight and true. In the photo some commonly available

shelving serves as a rip fence.



step 19Safety concerns

Always set the saw's cutting depth so the teeth just barely come through the top surface of the piece

being cut. (See the photo.) The cut will be smoother and the piece being cut hides most of the blade to

guard the user against damage in the event of an accident.. If there is an accident, you will have a cut

you can heal with a common adhesive strip bandage, not a wound that goes down into bone.

Do not wear loose clothing and tuck long hair into your collar. You do not want these to become caught

in the spinning blade.

Stand so you are well-balanced and not leaning on something for support.

I use pusher sticks a lot. The object is to keep my hands and fingers at least six inches away from a

spinning blade at all times. Do not rely on blade guards alone. When extra safety devices are available,

people take extra risks. That has been documented in studies.

A switch easy to reach at the front of the saw is also good to have, especially since you will need to tie

the saw's switch in the "on" position for use.

Keep the saw properly aligned so the blade does not bind and throw work or pull you into the blade.

Saw only dimensional lumber on this saw--no limbs for firewood.

If you are using a carbide tipped blade, stand to one side of the blade. Although not common, I have

heard firsthand stories of a tooth thrown by one of these blades. Avoid sawing wood with a lot of sap or

pitch in it to avoid the blade binding in the wood.

Wear approved eye protection when using the saw and be ever vigilant.

Disconnect the power whenever making adjustments to the saw, especially under the saw table.



step 20What will it do?

The most intricate project I built with my circular saw converted to a table saw was a Parsons table,

actually four of them from one 4 x 8 sheet of 1/2 inch oak veneer plywood. I made them as gifts for

others and cannot find a photo of them I am certain I had somewhere. I recreated the design in Google

Sketch-Up and edited it in MS Paint. The short straight black lines are to indicate the direction of the

grain in the plywood. The inset at the lower left shows the detail for the joints where the sides met the

top and where the legs met one another. A thin piece of wood joined the pieces in the kerf cut into

each 45 degree bevel. The pieces all fit as tightly as the drawing of the table would lead you to believe.

The tables were about 20 x 20 x 20 inches.

Mounting a hand circular saw adds accuracy and versatility to a basic tool. It also provides the home

woodworker on a budget with a good alternative to buying a table saw. Had I not been able to buy a

radial arm saw a few years after making my table saw conversion, I would still be using it. (My wife said,

"You may have a radial arm saw, but you are not going to have two saws." I had to sell my circular saw

and saw table. A couple of years later her parents did give me another circular saw.)



Router Fence for a Table Saw Your table saw is a router table and jointer just waiting to happen. Replace one of the saw's wings (or adapt your existing table board) to hold a router table insert, and you're in business. Add this router fenceto your table saw's fence and you get a router fence with the capacity to handle boards few commercialrouter tables could even touch. Make a couple quick adjustments to the fence and you can edge-jointboards for gluing up panels -- no jointer necessary. To download a .pdf of the 3D construction drawing of the till, click HERE

This fence was designed for the Little Shop Mark II, a rolling workshop that was featured in theSeptember 1999 issue (#110). However, this fence will work with just about any contractor- or cabinet-style table saw.

This fence is essentially two long plywood boxes with hardwood face fronts on them. The space betweenthe boxes is where the router bit spins. One of the boxes stores router bits, the other acts as a dustcollection chute. Though construction isn't complex, study the diagrams carefully before you begin.

It's in the Hole

First cut the hole for the insert in the top of your saw's table. If you've built the Little Shop Mark II, use theend of the long top for your table. For contractor's saws, you can use the table board on the right side of the saw. Or you can replace one of your saw's wings with a piece of laminate-covered plywood. Lay outthe spot for the router table insert. I put the insert in the middle of the width of the table and between theback and front rail from the end. Cut the opening for the insert as shown in the photos. Mount the insert tothe router. Drop it in the opening and adjust it so it's flush with the table.

Making the FenceFirst you build the body of the fence, and then you attach the fence faces afterward. Begin by cutting theopening for the bit on the front piece. Use a rasp to round over the inside right edge of the opening to helpdeflect chips into the box that will later be connected to a shop vacuum. Next cut the bottom piece for theright box and cut a 45-degree chamfer on the end next to the opening for the bit, again to deflect chips.

Assemble the boxes like this: First attach the two end pieces of the left box to the left bottom piece. Then

attach the larger end piece for the right-side box (with the dust collection hole) to the bottom piece for the

right box. Now nail the front and back pieces to the left and right assemblies. Be sure to hold the bottom

edges flush. For the top part of the fence, keep in mind there are three fixed pieces -- one on each end

and one in the middle. And there are two removable pieces that give you access to the bit storage, the

dust collection tube and the wing nuts that will hold the fence faces in place. Attach the three fixed top

pieces and the support.

Now drill the holes in the back piece to accept the 1/4" x 20 t-nuts that attach the router fence to the sawfence.

Make it Adjustable Now it's time to cut slots in the front piece that will be used for attaching the fence faces to your box andallow the fence faces to be adjustable. Rout the 1/4" x 2" slots for adjusting the fence faces according tothe diagram. Drop-cut plunge routing is something I'll only do with larger assemblies such as this. Smaller pieces don't have enough mass to absorb a kickback. If you're unsure about this process, then use a lessaccurate, but safer, method of drilling two 1/4" holes and connecting them with a jigsaw. The object is toget a 1/4"-20 bolt to slide smoothly throughout the length of the 2" slot. Now cut a 45-degree angle on theends of the fence faces, leaving a 1/8" flat end on the miter for durability. Lay out and drill the relief holesfor the 1/4" x 20 bolt heads then follow these holes with 1/4" holes for the bolt shanks.

http://www.popularwoodworking.com/features/fea19b.pdf






Tiny but Tough Fingers

The last step is to make finger boards. The method I use is to rip a piece of 3/4" wood to 3-1/8" and about8" long. When doing this, it's actually safer to have the blade height up a little higher than usual to preventkickback. A good rule is to move your fence 1/4" after each cut until you've completed the finger board.The fingers on this board are thick enough to take a beating, but thin enough to flex with some strength.Make three finger boards. One for both sides of the fence and one for the router table insert, with its

center right at the insert opening. PW

A Precise Table Saw From an Electric Hand Saw

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