chapter 6 2D drawing representation

Question 1

A rounded interior transition between surfaces; used to strengthen adjoining surfaces or to allow a part to be removed from a mold

Answer 1

fillet

Question 2

a rounded exterior transition between surfaces; to make edges and corners easier to handle

Answer 2

round

Question 3

a cylindrical recess around a hole, usually to receive a bolt head or nut.

Answer 3

counter-bore

Question 4

a conical recess around a hole, often used to receive a tapered screw head.

Answer 4

countersink

Question 5

a shallow recess like a counter bore, used to provide a good bearing surface for a fastener

Answer 5

spot-face

Question 6

a short raised protrusion above the surface of a part, often used to provide a strong flat bearing surface.

Answer 6

boss

Question 7

a flat or rounded tap protruding from a surface usually to provide a method for attachment

Answer 7

lug

Question 8

a flattened collar or rim around a cylindrical part to allow for attachment

Answer 8

flange

Question 9

an angled surface, used on cylinders to make them easier to start into a hole, or plates to make them easier to handle

Answer 9

chamfer

Question 10

a small groove cut around the diameter of a cylinder, often where it changes diameter.

Answer 10

neck

Question 11

a shaped depression cut along the axis of a cylinder or hub to receive a key, used to attach hubs, gears, and other parts to a cylinder so they won’t turn on it

Answer 11

key-way or key-seat

Question 12

a pattern form on a surface to provide for better gripping or more surface area for attachment, often used on knobs and tool handles

Answer 12

knurl

Question 13

a hollow cylinder that is often used as a protective sleeve or guide, or as a bearing

Answer 13

bushing