MECH 200 1st Edition Lecture 9Friction Saws/ Tube Mill• “Cuts on the Fly” o Allows the designated material to pass through and then moves with the material as it cutsSeparating Process – Drilling1. Twist Drilla. Shank – End that is gripped or hold the toolb. Flute – Grooves that eject chipsc. Cutting Lips – On the cutting tip (Most prominent things)d. Lip Clearance angle – Angle that cutting lips are elevated from heele. Margin – Diameter that the cut whole will bef. Web – Cross-sectiong. Chisel Point – Dead center2. Types of bits useda. Twist Drillb. Step Drill – Can cut two diametersc. Straight FluteThese notes represent a detailed interpretation of the professor’s lecture. GradeBuddy is best used as a supplement to your own notes, not as a substitute.d. Spadee. Gun Drillf. Brazed Carbide – a carbide tip is brazed onto the cutting end of the bitg. Augerh. Tree Panning Biti. Hole Saw (Use saw teeth speed not drill bit speed)j. Forstner Bit – creates flat bottom hole3. Shank Typesa. Squareb. Splinedc. Reducedd. Morse Tapere. Hexagonalf. Spline Shank – Linear and Rotary motionMortise and Tenon Joint – Used in furniture and created with a mortise bit to increase glue areaHow to measure a Drill Bit1. Drill Gauge2. Micrometer across the margin3. Calipers across margin4. Check to see if size is stamped on the shankBasic Speed1. RPM (max) = (4 x Cutting speed)/ (diameter)a. Cutting speed – (Check chart)i. Aluminum - 300 SFPMii. Brass - 200 SFPMiii. Steel - 50 to 100 SFPMPortable Drilling Machines – 3/8” angle drill, D-Handle Straight Drill, Heavy Duty Spade – HandleDrill, 3/8” DrillPortable Magnetic – Magnetic ClampDrilling Machine: • Stationary Drill Press – Bench or Floor Type (CLAMP WORK)• Radial Drill – Reaches out to farther diameters than floor types• Turret Drill – Production drill• Gang Drill – Cluster of drills • Gun Drill – Single Flute Drill for long deep holes• Multiple Spindle – Production of multiple holes drilled