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Oct 17, 2021
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How to make a circular saw attachment for fast cuts at 45 and 90 degrees

The performance of the circular saw is significantly reduced when cutting at 90 or 45 degrees due to long adjustments, including marking. In the presence of a homemade, not very complex device, these operations will be much faster and easier.

How to make a circular saw attachment for fast cuts at 45 and 90 degrees

It will take

Materials:

  • glued laminated timber;
  • multi-layer plywood 400 × 500 mm;
  • aluminum corner 1.5 × 10 × 25 mm;
  • aluminum strip 3 × 25 mm;
  • glue for wood and metal;
  • screws are different;
  • lubricant for sliding surfaces;
  • threaded bushings for wood;
  • wing bolts, washers and nuts;
  • adhesive measuring tape.

Instruments: ruler and pencil, clamps, drill, screwdriver, drilling machine, etc.

Circular Saw Attachment Manufacturing Process

We use laminated veneer lumber 25 and 45 mm wide. The base of the device is made of 400 × 500 mm plywood. Another combination of sizes is possible.

How to make a circular saw attachment for fast cuts at 45 and 90 degrees

We form blocks of laminated veneer lumber of the same height for all elements.

According to the markings, we install a bar with a length of 400 mm on glue across the base closer to one edge.

How to make a circular saw attachment for fast cuts at 45 and 90 degrees

On the edge of the far side of the base from the 400 mm beam, we install two 45 × 55 mm beams closer to one of the sides of the 500 mm base with a gap between them and, orienting the long sides transversely to the 400 mm beam.

How to make a circular saw attachment for fast cuts at 45 and 90 degrees
How to make a circular saw attachment for fast cuts at 45 and 90 degrees

On the other side of the 400 mm beam, along the edge of the 400 mm base side, we fix a 123 × 25 mm beam symmetrically to two 45 × 55 mm elements.

After the glue has hardened, we turn the base 180 degrees and, according to the markings, we strengthen all the elements from the bar on the front side with screws.

To the base of the aluminum corner 1.5 × 10 × 25 mm, glue an aluminum strip 3 × 25 mm with metal glue and squeeze it with clamps.

We lay aluminum corners with stripes longitudinally to the sides of the base 500 mm on supports from a bar so that their ends lie on the outer corners of a bar 123 × 25 mm and do not go beyond its dimensions.

According to the marking, we drill holes in aluminum guides above all supports from a bar with reaming on the front side.

How to make a circular saw attachment for fast cuts at 45 and 90 degrees

To fix the guides on the supports, apply adhesive tape, squeeze with clamps and fix one of them with screws first.

How to make a circular saw attachment for fast cuts at 45 and 90 degrees

We try on the sole of the circular saw for it, install the second guide and also fasten it with screws.

How to make a circular saw attachment for fast cuts at 45 and 90 degrees

For easy sliding of the saw blade along the guides, apply grease to them for metal surfaces.

Having checked the verticality of the saw blade, we make a through cut at the base, dissecting and cutting a bar of 400 mm, and also we cut into a support from a bar at the edge of the base, but we do not completely cut the base section from a bar of 400 mm to a bar of 123 × 25 mm.

Screw the threaded sleeve for wood M6 × 13 mm flush into the timber with the hole. We collect from it and two other elements a U-shaped unit, and the bar with the sleeve should be one of the legs of this unit.

How to make a circular saw attachment for fast cuts at 45 and 90 degrees

We screw the nut onto the wing bolt until it stops and screw it into the sleeve. We install the U-shaped assembly with legs on a 400 mm bar with the ability to move and fix it in the right place, determined by measuring tapes glued to the inner side of a 400 mm bar.

We draw a line at 45 degrees to the cut at the base, ensuring the processing of workpieces of a certain width.

Using the holes in the stop as a template, we drill counterparts in the base, into which we screw threaded bushings. We attach a stop-stop to them with the help of washers and wing bolts for cutting workpieces at an angle of 45 degrees.

How to make a circular saw attachment for fast cuts at 45 and 90 degrees
How to make a circular saw attachment for fast cuts at 45 and 90 degrees

To the end of the side of the base 500 mm, we screw wooden strips, which, when installed vertically, extend beyond the bottom of the base.

To exclude lateral displacement of the guides, glue wood stops from the outside.

How to make a circular saw attachment for fast cuts at 45 and 90 degrees

We install the device on a level place and fix it with the help of wooden planks at the end of the base.

How to make a circular saw attachment for fast cuts at 45 and 90 degrees

Now we can easily make cuts at 45 and 90 degrees without marking and easily perform cuts at 45 and 90 degrees, or efficiently prepare many blanks for one size.

How to make a circular saw attachment for fast cuts at 45 and 90 degrees
How to make a circular saw attachment for fast cuts at 45 and 90 degrees
How to make a circular saw attachment for fast cuts at 45 and 90 degrees
How to make a circular saw attachment for fast cuts at 45 and 90 degrees

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