Mastering The Mill

Mastering The Mill 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

Duration 50:33

Mastering The Mill 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
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

Duration 1:03:33

Mastering The Mill 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

Duration 46:33

Mastering The Mill 4

Reaming Holes Reamer is used to make a drilled hole larger and smoother within 2/10000″ of it’s diameter
Boring Holes A Boring Head is used for making very accurate holes; also used on a quill producing more accurate holes
Milling a Slot End Mills used to mill slots in a piece
Milling a Shoulder Conventional & Climb Milling
A Shoulder or step milled into a piece Conventional Milling-part is fed against the motion of the tool; best for rough cuts Climb Milling-Part is being fed along with direction or rotation of the tool; better surface finish cuts
Cleaning the Machine
Very important in the use of milling machine; chips, dust, etc.. Needs to be cleaned Only a brush or vacuum should be used. Air should never be used; this risks blowing chips into machine and possibly damaging it Most accidents in a machine shop happen when bringing parts to a machine or when the machien is being cleanedMachine Shop 8

Duration 45:33