Drilling Drills produces deep holes. Drilling machine Insert drill Max drill Drill Drill: http://www.youtube.com/watch?v=ul20R32HJ3E Drill: http://ma.gnu.ac.kr/vod/Machining/Drill.MP4

Tapping Tap produces thread inside the hold. Tap Feed Rate = RPM x Pitch Ex) M6 x 1 at 2000 RPM = 2000 mm/min Tapping Tapping holder and tool http://www.youtube.com/watch?v=vCHQLFZHHJc

Reaming, Boring Reamer enlarges an hole to the diameter of the tool. Boring produce precise circular internal profiles. Reaming Boring Drilling, Tapping, Boring: http://vimeo.com/8642433 http://www.youtube.com/user/GlacernMachineTools#p/u/0/om6GQKfoS1g

Planer and Shaper

Gear Hobbing A hob (cutter) is rotated one revolution to transfer each tooth profile onto a rotating gear blank. Used very often for medium to high sizes of production runs.  http://www.youtube.com/watch?v=DwFssm9trSc

Broaching Linear broaching: the broach is run linearly against a surface of the workpiece to effect the cut. Rotary broaching: the broach is rotated and pressed into the workpiece to cut an axis symmetric shape. Broaching gear: http://www.youtube.com/watch?v=2K45B6tDqsg&p=9B6D9EAE75875D9D Rotary broaching: http://www.youtube.com/watch?v=gUEcagEmmZo&p=9B6D9EAE75875D9D

Design for milling Minimize machining, use casting and forging. Minimize the length to diameter ratio of the tools. Design features to be machined from one side.

Design for milling The inside edges must have the radius of the end mill. For outside corners, chamfers are preferable over fillet. For flatness, bosses should be used. Ⓒ http://www.efunda.com/processes/machining/mill_design.cfm

Economics of Machining Total cost per piece consists of four items: Cutting speed Cost Tool Setting up Machining Total

References: Machine Tool Makers www.doosaninfracore.co.kr www.wia.co.kr www.hwacheon.co.kr www.mazak.jp (Japan) www.haascnc.com (USA) www.deckelmaho.com (EU)