To use the handle as a level:
- Loosen the adjustable knob.
- Slide the handle off of the blade.
- Utilize the handle as a normal level by placing the anvil side of the handle upon any surface wished to be measured.
- Read the vial to ensure levelness. If the bubble is in the middle of the vial, it is level.
What are the parts of a combination square rule?
A combination set with the rule (top), a standard head (left), protractor head (centre), and a centre finder head (right). Illustration showing a centre head, protractor head, and standard head attached to a rule. Combination square rules are made of steel and can be purchased with gradations in metric, imperial, or both metric and imperial.
How do you use a combination square to cut?
How to Use a Combination Square for Angles Place the shoulder of the square against the edge of the working surface you wish to cut. Draw a line along the blade edge until your pencil reaches the shoulder of the combination square. Once completed, the line should be a perfect 45° angle with the edge of the working surface.
How do you use a combination square as a hook rule?
If you need to draw a line parallel to the edge of a board, set your combination square to the correct measurement like you are using it as a hook rule. Then put your pencil at the very end of the ruler and slide the entire combination square down the length of the board.
How do you make a center line on a ruler?
The rule is assembled through the center of the center square, the two cast iron legs of the center square are then placed against the outside of the bar (dowel) allowing a center line to be scribed alongside the ruler. Perform this action at two locations and the intersecting lines will approximate the center of the bar (dowel).
What is the centering head in a combination square set used for?
Shop for Protractor Sets These “arms” meet along one edge of the ruler, at a 90 degree angle. This means that the angle from one of the “arms” to this edge is 45 degrees. The centre head can be used to determine the centre of circular objects, such as the end of rods.
How do you find the center of a combination square?
0:051:09Find the Center of a Board With a Combination Square - YouTubeYouTubeStart of suggested clipEnd of suggested clipAnd then mark from each. Side. Now that leaves a little gap in between. But you can then come backMoreAnd then mark from each. Side. Now that leaves a little gap in between. But you can then come back and reset the square hopefully to hit right in the center of that make another task.
How do you find the center of a circle with a combination square?
0:056:12How To Find The Center Of A Circle Using A Square - YouTubeYouTubeStart of suggested clipEnd of suggested clipSo here's how it's done first thing you want to do is you want to take the point of the square. AndMoreSo here's how it's done first thing you want to do is you want to take the point of the square. And place it anywhere on the edge of the circle.
How do you use a combination square angle?
3:374:4410 AMAZING things you can do with a combination square! - YouTubeYouTubeStart of suggested clipEnd of suggested clipAnd then drag the body against the edge of the workpiece. The same process makes it possible to drawMoreAnd then drag the body against the edge of the workpiece. The same process makes it possible to draw a line perpendicular to an edge that's much longer than the length of the rule.
How do you find the center of a board without measuring?
0:312:27Find the Center of a Board WITH NO MATH! - YouTubeYouTubeStart of suggested clipEnd of suggested clipHere's how it works. First thing we need to know is we need to find a starting point for ourMoreHere's how it works. First thing we need to know is we need to find a starting point for our diagonal. And you'll see where that diagonal comes in a moment.
How do you use a center finder head?
0:071:29Using the Center Finder - YouTubeYouTubeStart of suggested clipEnd of suggested clipThen you can rotate Center finder make another mark. And just like that you found the center of yourMoreThen you can rotate Center finder make another mark. And just like that you found the center of your circle. Works with squares to simply put the square on the other side of Center finder.
How do you find the center?
2:494:13How do you find the center of a circle? (Geometry) - YouTubeYouTubeStart of suggested clipEnd of suggested clipSince all perpendicular bisectors pass through the center the point where the two bisectorsMoreSince all perpendicular bisectors pass through the center the point where the two bisectors intersect is the center of the circle.
How do you drill the center of a circle?
Finding the center First would be to make 3 lines on the outside of the dowel the cross 2 different points along the circumference (each line). Then draw 3 perpendicular lines from the center of those lines. The point where all those lines intersect is the center of the circle.
What is the easiest way to find the center of a circle?
To find the center of a circle, start by drawing a straight line between 2 points on the circle. Don't worry about trying to draw the straight line so it's in the center -- anywhere on the circle will do. Then, draw a second straight line that's parallel to the first line on the opposite side of the circle.
How do you know if a combination square is accurate?
0:483:16Checking Your Combination Square - YouTubeYouTubeStart of suggested clipEnd of suggested clipI'll make sure that my my thumb screw is tight but not too tight on my blade. Hold it against thatMoreI'll make sure that my my thumb screw is tight but not too tight on my blade. Hold it against that edge. And draw a line. Now I'll take my my square flip it over. And make sure that I start at the
Which head should be used on a combination square to check right angles?
Combination Square Set Square Head The square head is primarily used for measuring right angles (90 degrees) and 45 degree angles, but can also be used for other jobs including the measurement of depths.
How do you use a combination square for a 45 degree angle?
1:023:19Combination Square Crash Course - YouTubeYouTubeStart of suggested clipEnd of suggested clipLike the crease as possible. Now if you want to do a 45 degree. You can slide this to the other end.MoreLike the crease as possible. Now if you want to do a 45 degree. You can slide this to the other end. And you know put that line. And that right there is 45 degrees to the edge.
Where is the centre of a square?
The center of a square is at the origin and its one vertex is `A(2,1)dot` Find the coordinates of the other vertices of the square. The center of a square is at the origin and its one vertex is `A(2,1)dot` Find the coordinates of the other vertices of the square.
What is the center point of the square?
So the center of a square, rectangle, rhombus or parallelogram is where the diagonals intersect, this is (among other properties) the fixed point of rotational symmetries. Similarly the center of an ellipse or a hyperbola is where the axes intersect.
What is the centre of a square?
The centre of rotation of a square is the point of intersection of its diagonals and the angle of rotation is 90° and the order of rotational symmetry of a square is 4.
Which is the number in the centre of the square?
The centre of a square ABCD is at z=0.
What is a combination square?
A combination square consists of a rue-type blade attached to a handle. The handle is composed of two parts, a shoulder and an anvil. The shoulder is placed at an angle of 45° between itself and the blade.
How to tell if a combination square is accurate?
To test the accuracy of the shoulder, one may simply gauge the angle it makes with the blade against a 45° drafting triangle. If the angle between the shoulder and the blade is the same as that of the triangle, ...
How to make a pencil parallel to the work surface?
Put pressure on the end of the blade rule with your pencil and move the handle side along the work surface, allowing your pencil to follow with the motion of the handle. Once this has been done for the desired length, lift your pencil and combination square to notice the parallel line along the working surface.
How to check for plumb on a combination square?
To use the combination square to check for plumb: Place the outside edge of the blade against the vertical surface that is to be measured. Ensure that the bubble is in the middle of the vial. For more how to use information, visit our how to use levels and tools guide.
Where to place shoulder of square?
Place the shoulder of the square against the edge of the working surface you wish to cut.
How to use an anvil handle?
Utilize the handle as a normal level by placing the anvil side of the handle upon any surface wished to be measured.
How to find the center of a board?
You can also find the precise center of board in a similar fashion. Draw a square line anywhere across an edge, then mark a 45˚ line starting at the corner of the line and the edge. Flip the square over and draw a second 45˚ line from the opposite corner. The two lines will make an “X” and the intersection will be at the exact center of the edge.
How to check an inside corner of a table saw?
To use the square to check an inside corner, loosen the knob and set the bottom of the rule down on a flat surface, such as the top of your table saw. This ensures that the rule is not extending past the head. To check an outside corner, hold the square against the end of the board and aim that at a source of light.
How thick is a 6" Starrett square?
Parts of the square itself can be used to mark common dimensions. The rule on the 6″ Starrett combination square is 1⁄16” thick and 3⁄4” wide. On the 12″ square, the blade is 1″ wide.
How to make a joint layout?
Most joint layout involves making a line parallel to an existing edge. Adjust the rule to any dimension from the bottom of the head and hold the head against an edge. Place the point of your pencil against the end of the rule and slide the square along the edge, keeping the pencil in place.
How to make a rabbet in the end of a board?
Want to make a rabbet in the end of a board that matches the thickness of another board? With a fixed-head square, you have to measure the thickness, then carefully measure from the end and make your mark. If you’re good at measuring and really careful you can come pretty close, but it will take a while.
How to mark repeating distances?
You can also use an adjustable square to mark repeating distances along a line, such as a row of regularly spaced holes for shelf pins. Set the center-to-center distance and make a mark at the center of the row to start. Then set the edge of the head on the mark and make a second mark from the end of the rule.
How much does an engineer square cost?
If that’s all you need, you can get an imported engineer’s square for $10. Where the combination square and the adjustable square become heroes is when you make use of the sliding rule.
What is the best combination square?
When buying a combination square, one name comes to mind: Starrett. They invented the tool and are known for making perhaps the best quality combination square around. It operates smoothly and is the most accurate you can buy. Price remains the only drawback. At well over $100 for the 12-inch model, Starrett combination squares run ten times more expensive than some of their competitors. I suppose quality comes with a price.
How to draw parallel to edge of board?
If you need to draw a line parallel to the edge of a board, set your combination square to the correct measurement like you are using it as a hook rule. Then put your pencil at the very end of the ruler and slide the entire combination square down the length of the board. Keep your pencil registered against the end of the blade while moving the square. This is what a marking gauge does, except you don’t have to hold onto the pencil or marking knife.
How to measure the height of a router blade?
Set the anvil so it lines up with 0” and place the anvil on a table saw or router with the blade sticking straight up in the air perpendicular to the table. Align the ruler so it is just touching your saw blade or router bit and you have a convenient way to measure the height of your blade.
How to measure woodwork height?
Some woodworkers prefer to set the measurement they need on the combination square instead of 0”. Hold the end of the ruler on the table and raise the blade or bit until it just touches the anvil. This gives you the height, but you must make sure the end of the ruler is perfectly flat against the table or router base. I don’t like this method. It is too easy to introduce a slight angle in the ruler which will throw off your measurement.
What is a tri square?
Tri-squares are some of the earliest forms of woodworking measuring and layout tools. The Egyptians and the Romans used them. A combination square in its simplest form is an adjustable tri-square with the head that moves up and down the length of the blade. The combination square can measure both 90 and 45 degrees, something most traditional tri-squares cannot.
What is a hook ruler?
A hook ruler is a ruler that has a small 90 protrusion that lets you hook it over the edge of a board. This is faster and more accurate than trying to hold 0” by hand on the edge of the board. A combination square will do the same thing if you set the head to read 2” on the ruler. You can then hook the head on the edge of the board to do your measuring. Just remember to compensate for the ruler starting at 2” instead of 0” like a real hook ruler.
What is a combination square?
Laroy S. Starrett (1877) A combination square is a multi-purpose measuring and marking tool used in metalworking, woodworking, and stonemasonry. It is composed of a rule and one or more interchangeable heads that can be attached to the rule.
When was the combination square invented?
Though some earlier 19th century tools were called combination squares, the modern combination square was invented in the late 1870s by American inventor Laroy S. Starrett, and patented in 1879. In 1880 he founded the L. S. Starrett Company in Athol, Massachusetts, United States.
What is the most common head used for?
The most common head is the standard head, which is used as a square for marking and testing 90° and 45° angles. The other common types of head are the protractor head, and the centre finder head.
What is a standard head?
The standard head can be used as a: Square, for marking and referencing 90° angles and checking if surfaces are flat and square to one another. Mitre square, for marking and referencing 45° angles, such as in woodworking for mitre joints.
What are the heads of a spherical sphere made of?
The heads are manufactured from either forged steel, cast iron, die-cast aluminium, die-cast zinc, or plastic. Aluminium and zinc heads are cheaper than steel and iron, but less durable and more prone to inaccuracy. Cast iron and steel heads are also notably heavier.
What is the purpose of marking lines through the centre of a circle?
Making multiple marks at different angles can be used to identify the point at the centre of the circle.
What are square rules made of?
Rule. Combination square rules are made of steel and can be purchased with gradations in metric, imperial, or both metric and imperial. Both faces of the rule have markings, providing four different sets of markings. This allows different sides to have different graduations (eg. 1mm or 0.5mm markings) or units (ie. metric and imperial).
