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AG 240I
Finding the center of a circle.
Use dividers or a compass and spread them to approximately the same length as the radius of the circle.
Draw three arcs from different points around the circumference of the circle.
The point where the three arc intersect is the center of the circle.
Squaring with a 3, 4, 5, triangle.
A triangle that measures 3 x 4 x 5 is a right triangle.
These numbers can be in any unit inches, feet, yards, etc. Or they can all be multiplied by any number and used in the same way.
Measure from one corner and make a mark at 3 units. Measure the other direction and make a mark at 4 units. Then measure diagonally between the marks. When this measures 5 units the members are at 90(.
4 5
3
Transferring and Splitting angles
Use a sliding T bevel to obtain the necessary angle.
Draw a straight line on a piece of plywood or cardboard about " from one edge parallel with that edge.
Transfer the angle from the sliding T bevel to the board. The angle should intersect the line drawn in step 2.
Spread a compass about 3" or 4" and place the point where the two lines of the original angle intersect. Place an arc on each line an equal distance from that point.
Spread the compass approximately another ". Make an arc in the center of the angle with the point of the compass on each arc created in step 4.
Draw a line from the intersection of the arcs in step 5 to the intersection of the two lines in step 3.
The angle between this line and the line from step 2 can now be transferred to the sliding T bevel and used to cut to pieces of material to combine and obtain the original angle.
To assure proper joint alignment of joints
Use a short 1' or 2' piece of angle iron and 4 clamps
Clamp the outside (flat side) of the angle iron to one member of the joints with two clamps.
Align the other member of the joint and clamp it to the angle iron with two clamps.
If the joint is at an angle the angle iron will be place diagonally between the two members of the joint. If it is a straight joint the angle iron will be parallel to the members of the joint.
The angle iron assures that one side of the joint is flat, therefore, the remaining sides of the joint should be aligned.
Angle Iron
Clamp here
Aligning cross members.
Clamp a piece of angle iron to the inside of frame rails on both sides the entire length of the frame. The angle iron should be positioned so the top of the angle iron is flush with where the bottom of the cross members should be on both ends.
Clamp the cross members to the angle iron.
Clamp cross member here
Clamp angle iron to frame here on both ends and in the center.
End View
To align pipe or shaft to be welded in a straight line.
Cut two pieces of angle iron that are about 8" long. The size of the angle iron will depend on the diameter of the pipe or shaft. The angle iron should be able to lay on the pipe or shaft with the legs against the pipe or shaft and the angle toward the outside.
Tack the center of the two pieces of angle iron to each side of a CClamp.
Use the CClamp to clamp the pipe or shaft together.
This should insure that the joint is straight.
End View
To make a TJoint from pipe
Cut two sides of the pipe off at 33( from the center of the diameter so it will fit around another pipe to make a T.
33(
Welding around other pieces where filler metal is not necessary. For example building up gears or filling in a hole that is out of round.
Apply carbon to areas where filler metal is not desired. Carbon paste may be purchased from a welding supply company.
To fill in around a hole that is out of round.
Apply carbon past to the proper diameter pipe, bolt, shaft, etc. and place it in the hole.
Begin welding around the hole until it is filled.
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