Final answer:
To weld bandsaw blades, a spot welding machine is typically used as it provides a precise and durable bond necessary for the blade's smooth operation.
Step-by-step explanation:
The type of welding attachment used to weld bandsaw blades is a spot welding machine. When welding bandsaw blades, it's crucial to produce a joint that is strong yet minimally obtrusive so as not to interfere with the blade's operation. Therefore, spot welding is the preferred method.
The spot welding machine utilizes electric current to fuse the metal at specific points, ensuring an efficient and durable bond between the ends of the bandsaw blade.
Other methods like soldering irons, arc welding machines, and gas welding torches are not commonly used for this delicate task.