What is the difference between augur and spade bit
Auger Bits:
Auger bits
are designed for drilling holes in wood and other soft materials. They have a helical screw-like shape with a deep spiral flute that runs along the length of the bit. This design allows the bit to pull itself into the wood as it rotates, making it suitable for drilling deep holes. The cutting edges of auger bits are usually sharp and chisel-like, which helps in effectively removing wood chips from the hole.
Here are some key features and uses of auger bits:
1. Hole Diameter: Auger bits are available in a wide range of diameters, typically ranging from 1/4 inch to 1 1/2 inches or larger. They are commonly used for drilling larger holes.
2. Hole Quality: Auger bits are known for producing clean and smooth holes with minimal tear-out. The spiral flute design helps to remove chips efficiently, reducing the chances of splintering or rough edges.
3. Application: Auger bits are versatile and well-suited for various woodworking tasks. They are commonly used for drilling deep holes, through-holes, dowel holes, and holes for plumbing or electrical conduits.
4. Stability: The design of auger bits provides good stability during drilling. The screw-like shape and the central point of the bit help guide the bit into the wood, reducing the chances of wandering or slipping.
AUGER BITS | Findbuytool
Spade Bits:
Spade bits, also known as paddle bits or flat bits, are commonly used for drilling holes in wood. They have a flat, paddle-shaped cutting head with a central point and two cutting spurs that extend from the sides. The cutting spurs score the wood fibers, while the main cutting edge removes the material. Spade bits are typically used for rough drilling applications.
Here are some key features and uses of spade bits:
1. Hole Diameter: Spade bits are commonly available in smaller sizes, typically ranging from 1/4 inch to 1 1/2 inches. They are often used for drilling smaller holes.
2. Hole Quality: Spade bits are not known for producing the cleanest or smoothest holes. Due to their aggressive cutting action, they can cause more tear-out and roughness, especially in softer woods. It is important to use spade bits carefully to minimize tear-out.
3. Application: Spade bits are primarily used for rough drilling applications in wood. They are commonly employed for drilling clearance holes for bolts, creating holes for electrical wiring, or any task where hole quality is not a primary concern.
4. Stability: Spade bits can be more prone to wandering or grabbing if not used carefully. It is essential to ensure a secure grip on the drill and maintain control during drilling to prevent the bit from slipping or deviating from the desired path.
In summary, the main differences between auger bits and spade bits can be summarized as follows: Auger bits are designed for drilling larger holes, produce cleaner and smoother holes, and are suitable for various woodworking tasks. Spade bits, on the other hand, are used for drilling smaller holes, may produce rougher holes with more tear-out, and are more commonly used for rough drilling applications.