Drilling Holes larger aspect ratio (thicker) use cutting fluid b/c chips have harder time clearing the drill keeps chips cool and lubricates them so they slide out of hole. chatter caused by drill jumping around hole: running drill too fast. may need to change transmission ratio for diff sized bits if there is chatter that speed change will not fix. if levers don't shift, something needs to turn, either motor or spindle. step-up drill size. sensitive chuck for hand feeding very small bits. very cool.
Special Drills for Plastics and Hard or Abrasive Materials softer materials: high helix angle of normal bit will dig down and possibly pull part up out of device when used with some materials ie. plastics lower helix angle will scrape rather than cut allows safe drilling of materials that may tend to be lifted up hard materials: steel, ciruit boards (fiberglass) use tunsgton carbide drill.
Drill Press Limitations chatter when used as milling machine.. irregularities. lack of stiffness cannot handle the load of an arbor press (sp??)
Bandsaw cut down larger peices of stock to near net size of part you want to make narrow blade makes it possible to cut curves. 3 teeth always in contact with part.. otherwise risk damaging blade noise of using a coarse blade can be danger to those in shop.
Suitable Speeds, Feeds and Materials
Bandsaw Setup proper handling & blade guard guidance. 10:52 posture, stand squarely, hands firm on bed of machine. safe handling & proper hand placement. until 10:54
Using the Drill Press Vise round stock. use vice to avoid getting cut by spinning part
Machine Shop 3
Basic 3 Belt Sander move part back & forth to eliminate hot spots holding part properly will keep fingers from getting sucked into machine along with part.
Good Practice . Clean Up dust: toxic dusts: 3:36 vacuum attached: fine particles. large particles sit and get swept up. wear dust mask.
Small Belt Sander Configurations sand surfaces in notches & grooves
Grinder Operations and Materials making different tools for specialized purposes. types of application: review never grind aluminum: aluminum becomes embedded in stone and stick, therefore no aluminum smearing aluminum on aluminum, no grinding going on dress wheel to remove aluminum: dresser has star wheels softer steel than stone teeth pounds on wheel and breaks up aluminum and cleans up stone
Deburring and Buffing supposed to be guards to protect you (3:51) in this case you could get caught. hah! he demonstrated what happens when you improperly handle w/o guard also applies to buffing wheel (esp with furry finish of wheel can easily pull it out of your hands)
Finishing Techniques cloth buffing wheel: turn on wheel, press abrasive (mixed with wax) stick onto wheel. then you can start buffing
Machine Shop 4
Milling Machine 1
Layout & Use; what the different parts do
Quill Feed Allows you to move tool up and down
Axis Handfeed Feed/Crank on Axis with Dials to adjust the Bed
Gibb Locks Holds/Locks Bed to Saddle & Saddle to Knee and Knee to Body of Machine Locking Ring Adjustments
Power Feed Attached to one or more of the Axes Forward/Reverse Knob and Variable Speeed Control
Digital Readouts Measure position of Axes to 0.001" or in mm
Milling Machine Set-Up Squaring the Head Square=Z-zxis of head [Quill] is perpendicular to axis of Bed
Squaring the Vise Adjusting the vice so back [stationary] jaw of vice is parallel to bed Machine Safety, Protocol, & Shop Safety 9 Milling Machine Accessories & Workholding Techniques Milling Machine Tools Drill Chuck-drilling & reaming Boreing Head-more precise cutting to 0.0002" Fly Cutter-used to square up a part [4 teeth and 1 single tooth] End Mill-shank type milling cutter Collett Chucks-holds End Mills Saws-used to make deep narrow slots-installed on an arbor Reamers-used to smooth out inside of drilled holes Edge Finder & Center Finder-used to locate punches or holes on a milled part Boreing Tool-Used on a shank head to bore holes
Machine Shop 5
Milling Machine 2
Milling Machine
Square and Hex Collett Blocks-used to hold/clamp parts to machine features on 4 and 6 sides of a part, respectively 2 V Blocks Holding parts to machine features into parts and end of parts
Hold-down Clamps Used to hold large or irregularly shaped parts
Using Angle Blocks Used to hold materials to machine features not perpendicular on a part
Drill Press Vice Used to hold a part to machine a feature @ 45? angle and other positions/angles Also used with angle blocks to hold parts
Lathe Chuck With Vise Used to hold parts in the milling machine; not accurate method, but quick/convenient
Double Sided Tape Used to hold a part in a vice securely without distortion
Squaring High Aspect Ratio Parts Used to hold a part to be machined securely and squared
Right Angle Attachment A right angle gear box to mill features in an end of a larger/slender part that is clamped in the vice.
Slitting Saw A saw blade that is used to cut slots/slits/features in a part Can also be used with a right angle attachment
Rotary Table A bench/table attached to the bed of the machine used to machine circular parts, grooves, circles, segments Dial indicator and Co-Axe indicator uses to square/center the Table to the Y axes
5 C Collett Indexer Used to hold Colletts and position parts in up to 24 positions for various milling features
Comments (6)
Machine Shop 5 Milling Machine 2 1 Milling Machine 2 Square and Hex Collett Blocks-used to hold/clamp parts to machine features on 4 and 6 sides of a part, respectively 2 V Blocks Holding parts to machine features into parts and end of parts 3 Hold-down Clamps Used to hold large or irregularly shaped parts 4 Using Angle Blocks Used to hold materials to machine features not perpendicular on a part 5 Drill Press Vice Used to hold a part to machine a feature @ 45. angle and other positions/angles Also used with angle blocks to hold parts 6 Lathe Chuck With Vise Used to hold parts in the milling machine; not accurate method, but quick/convenient 7 Double Sided Tape Used to hold a part in a vice securely without distortion 8 Squaring High Aspect Ratio Parts Used to hold a part to be machined securely and squared 9 Right Angle Attachment A right angle gear box to mill features in an end of a larger/slender part that is clamped in the vice. 10 Slitting Saw A saw blade that is used to cut slots/slits/features in a part Can also be used with a right angle attachment 11 Rotary Table A bench/table attached to the bed of the machine used to machine circular parts, grooves, circles, segments Dial indicator and Co-Axe indicator uses to square/center the Table to the Y axes 12 5 C Collett Indexer Used to hold Colletts and position parts in up to 24 positions for various milling features
Machine Shop 6
Milling Machine 3 Squaring a part, maching all surfaces so they are flat and perpendicular to one another and nominally to the part that will be milled; removing burrs
Squaring a Plate Squaring the sides of a part/plate to the dimensions of the finished milled part; remove burrs
Using the Edgefinder Used to locate the edge of a part relative to the spindle of the machine
Drilling Holes Drill press used to drill holes in parts; center drill milling and other drill bits; setting depth stop
Ethanol Free Gas
