Engineering Drawing | T-Square

Today's article cover all about a tool called T-Square.

T Square is basically a scale attached to a vertical head and as per defination it is a tool used to draw horizontal lines on the Drawing Sheet, apart from this it is also used to support Set Square which can be used to produce lines in multiple of 15°.

The measuring portion is called Blade and is used to draw horizontal lines on Drawing Sheet. The edge of the scale is called Working Edge. The remaning black portion is called Head/Stock which is used to support the T Square against the slotted edge of the Drawing Board so that it can facilitate drawing parallel horizonal lines as shown in figure.

T-SQUARE is basically available in 4 different size for different size of sheet namely T₀, T₁, T₂, T₃.

Type	Scale Length (mm)
T0	1500
T1	1000
T2	700
T3	500

Note:
● T Square cannot be used to draw Vertical lines as Drawing Board doesn't have any slot to guide the movement of T Scale in Horizontal Direction.
● T Square can be used to measure the Straightness and Squareness of any component or diagram

_{T-Square credit. drawing board credit Cover imgSource}

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