Understanding Cold Chisels and Their Types

Cold chisels are essential hand tools used for cutting, chipping, or shaping cold metal. They work by being struck on the head with a hammer while the cutting edge is applied to the workpiece. Different tasks require different shapes and sizes of cold chisels.

Identifying the Cape Chisel

The question describes a cold chisel with a specific shape: "a long taper on the top and bottom of the cutting end and a narrow edge". Let's look at the common types of cold chisels to identify the one that matches this description.

• Flat Chisel: This is the most common type. It has a wide, flat cutting edge used for general cutting, chipping, and trimming of flat surfaces. Its width is relatively large compared to its thickness at the cutting edge.
• Cape Chisel: This chisel has a narrow cutting edge, much narrower than the body of the chisel. The material is tapered away sharply on both the top and bottom near the cutting edge to form this narrow shape. This makes it suitable for cutting grooves, slots, or keyways. The description "long taper on the top and bottom of the cutting end and a narrow edge" perfectly matches the design of a cape chisel.
• Round Nose Chisel: As the name suggests, this chisel has a rounded cutting edge. It is used for cutting curved grooves or channels, often for scraping or cleaning rounded corners or fillets.
• Diamond Pointed Chisel: This chisel has a square cross-section ground to a point at the cutting end, resembling a diamond shape when viewed from the side. It is used for squaring up corners in slots or for cutting V-shaped grooves.

Matching the Description to the Chisel Type

Comparing the description given in the question with the characteristics of the different cold chisels:

• The description mentions a "narrow edge" and a "long taper on the top and bottom".
• The flat chisel has a wide edge.
• The round nose chisel has a rounded edge.
• The diamond pointed chisel has a pointed, V-shaped edge.
• The cape chisel has a distinct narrow cutting edge formed by tapers on both sides.

Therefore, the description accurately points to the cape chisel.

Conclusion

Based on the shape described – a long taper on the top and bottom of the cutting end leading to a narrow edge – the correct cold chisel type is the cape chisel. This design allows the cape chisel to cut narrow grooves and slots that wider chisels cannot.