Metal drill bits

 Yr 9 Term 3 Drill bits.

 

Answer the following questions using this doc  https://drive.google.com/file/d/0B_C_XhcwQPsxZXVmQi1zLUtTV2pjTmcwek84Q2gxX3g5WXQ0/view?usp=sharing&resourcekey=0-zs9pvvfUCjJfDoET8gF6iA

Question 1 Parts of a drill bit

Question 2. What are the twist drills made from

Question 3. List the 4 points needed for a correctly grounded drill cutting edge reason: so it can drill through the metal. Land reason: so the land helps support the cutting edge and the rest of the parts of the twist drill it’s pretty much the body.

Question 4. What lubricant is required for mild steel and aluminum

Question 5. How are drills identified? Wood Drill Bits: These can be identified by a small, pointed tip at the very end. If you look closely, you can see spurs on each side. 

Masonry Drill Bits: These bits have a gently sloping tip. 

Metal Drill Bits: These have a wide-angled point at the end, and they may also be painted black.

Question 6. Draw a morse taper drill shank 

Question 7. What is a countersink drill used for? Countersinks are mainly used for countersinking drill holes, countersinking screws, and deburring.

Question 8. Redraw the countersink drill and the hole in its drills

Question 9. Describe the steps needed when drilling large holes or drilling accurately.

Question 10. Redraw the diagram showing marking out for a general hole. This is the information that I found about drill bits