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Heavy duty soldering tips are derived from the shapes B, D and I with a thicker radius along its body to increase heat storage. This makes it best suited for work requiring high heat capacity. 

Both shapes BC/C and D are suitable for melting and removing coil coatings due to the flat edge of the soldering tip. 

A cup terminal is a hollow cylinder with the lead wire inserted and soldered in place. Shape D is the recommended tip for soldering cup terminals. 

The wider surface area of a concave tip that comes into contact with the board and the lead means that there is an excellent heat supply to the solder joints, ensuring sufficient solder flow-up.

There are a few shapes that are suitable for point soldering, however, Shape D is recommended especially for quad flat package (QFP) components. 

Pre-Tinning is the act of coating solder around a stranded electrical wire before actually soldering the wire. This protects the wire from oxidation as the solder forms a protective layer of coating. It makes it easier to connect the pre-tinned wires to connectors and ensures that they are all joined, forming an electrical connection. 

When dealing with micro-soldering, it is common to come across workpieces with tight or narrow spacing. Read on for Hakko's recommended soldering tips for soldering at narrow pitches!