Different Type of shears uses in Sheet Metal work as as follows
- Tinman’s shears (straight shears).
- Universal combination shears or Gilbow shears.
- Pipe shears
- Scotch shears
- Block shears
- Rohdes shears
- Hawk billed shears
- Aviation shears
- Bench shears
- Double cutting shears
- Electric portable shear
1. Tinman’s shears (straight shears).
It is used for making straight cuts and large external curves upto the thickness of 18 SWG. Cutting angle of a shears is 87º. The cross sectional view of the cutting blades is shown. Never grind the face of the blade.Universal combination shears or Gilbow shears
2. Universal combination shears or Gilbow shears.
Its blades are designed for universal cutting, straight line or internal and external cutting of curves may be right hand or left hand, easily identifiable as the top blade is either on the right or the left.
3. Pipe Shears
4. Scotch Shears
It is a shape as shown in the figure, its handles are formed as eye holes to give extra grip to the hands. It is also used as Tinman’s shears.
5. Block Shears
One of the handle of the shear is bent downwards as shown in the figure. The bending portion should be fixed on the iron plates hole and the upper handle will be held by the worker. It is used in mass production purposes.
6. Rohdes Shears
Its one handle is shorter in length as compared with the other handle as shown in Figure.
7. Hawk billed shears
It is used for the inside cutting of an intricate work. The snips have narrow curved blades that allow you to make sharp turns without bending the metal.
8. Aviation shears
It can be used for all kinds of cutting. These are made with left, right or universal cutting blades.
9. Bench shears
These are designed to have one handle held in a vice or bench plate, while the other handle is moved up and down. They can cut 16 gauge to 18 gauge thickness sheet metal.
10. Double cutting shears
These shears have three blades used to cut around cylindrical objects, such as cans and pipes. A single blade is pushed through the metal to sheet to cut.
11. Electric portable shear
Electric shears are used to cut corrugated metal sheets or a sheet metal of 18 gauge thickness or lighter sheet metals. The shear point can be inserted with a light hammer blow.
Successive blows will drive the shear on a scribed line for almost any shape like inner circles, zig zag, curvature line easily. A strip of metal about 3″/32 (2.5 mm) wide is removed in this shearing operations.