# Shared Flashcard Set

## Details

Theory - Lathe Operations
Information on the Lathe Operations
21
Education
Not Applicable
11/10/2012

## Cards Return to Set Details

Term
 What is one thing to be aware of when using the crossfeed dial?
Definition
 Backlash. To avoid issues because of backlash if you overshoot your correct setting turn your dial back one full turn to take out the backlash then approach the correct setting again.
Term
 What are the 5 steps you should take before parallel turning?
Definition
 Step 1: Align the Tailstock to CentreStep 2: Taking a Trial Cut and set the crossfeed to zeroStep 3: Use the crossfeed dial to set your depth of cutStep 4: Taking Roughing CutsStep 5: Taking your finish cut(s)
Term
 On a direct reading(Corrected) dial what does each graduation on the crossfeed dial represent?
Definition
 Each graduation on a direct reading (Corrected) dial represents 0.001" on the DIAMETER of the workpiece. (When you turn the dial 1 graduation the diameter will be reduced by 0.001")
Term
 On an indirect (Uncorrected) dial what does each graduation on the crossfeed dial represent?
Definition
 Each graduation on a indirect reading (Uncorrected) dial represents 0.001" on the RADIUS of the workpiece. (When you turn the dial 1 graduation the diameter will be reduced by 0.002"(2x the radius))
Term
 What are boring bars used for? What sized bar should you pick? How should they be held on your toolpost?
Definition
 Boring bars are used to cut internal holes of any size accurately. You should always pick the biggest boring bar possible. They should always be held with the smallest overhang possible. (Short and fat is where it's at)
Term
 When facing where should you set your tool in relation to the centre of the workpiece?
Definition
 You should set your tool on centre.
Term
 What should you be doing when centre drilling?
Definition
 You should be peck drilling and using lots of oil to prevent breaking your tool bit. Drill about 2/3 of the way up the tapered portion of the drill.
Term
 What are the 4 steps of reaming to produce an accurate hole with a good surface finish?
Definition
 The 4 steps are1) Centre Drill2) Drill3) Bore (Make Hole True)4) Ream
Term
 For reamed holes smaller than 1/2"(13mm) use a drill that is __"(__mm)undersized. For reamed holes 1/2"(13mm) and bigger use a drill that is __"())mm) undersize.
Definition
 For reamed holes smaller than 1/2"(13mm) use a drill that is 1/64"(0.5mm)undersized. For reamed holes 1/2"(13mm) and bigger use a drill that is 1/32"(1mm) undersize.
Term
 When reaming what should your spindle speed be set to?
Definition
 Half the speed you would normally use for a drill of the same size.
Term
 What are 3 ways to use a lathe to cut a taper?
Definition
 3 ways to use the lathe to cut a taper are:Using the compound restUsing the Tailstock Offset MethodUsing a Taper attachment
Term
 What is the centreline angle?
Definition
 Half of the included angle
Term
 When parting set the spindle speed to _____ of the speed you'd want to use for turning. Do not ever part ____ ____.
Definition
 When parting set the spindle speed to half of the speed you'd want to use for turning. Do not ever part between centres.
Term
 What speeds and feeds should you use for knurling?
Definition
 Your speed should be approx. 100rpm. For fine knurls use about 0.015" feed rate. For medium knurls use about 0.020" feed rate. Finally for coarse knurls use 0.030" feed rate.
Term
 When cutting a 60 degree thread with slant depth what angle should you set your compound rest to?
Definition
 You should set your compound rest to approx. 29.5 degrees.
Term
 What is the purpose of a steady rest? Where do you attach it?
Definition
 The purpose of a steady rest is to support long pieces of work either at the end or in the middle. You attach it to the ways.
Term
 What is the purpose of a Follower rest? Where do you attach it?
Definition
 A follow rest keeps the workpiece from deflecting away from the cutting tool but supporting the workpiece directly where the cut is taking place. It attaches to the saddle of the lathe.
Term
 What is the taper of a solid mandrel?
Definition
 The taper is 0.006" to 0.008" taper per foot.
Term
 When you are filing what hand should you hold the file in? What should your file always have before using it on a lathe?
Definition
 You should ALWAYS hold in in your left hand. The file should always have a handle.
Term
 When using emery cloth on a lathe what should you do?
Definition
 Always be alert that the strip of emery cloth can wrap around the workpiece and pull your hands in. Keep your hands away and lean away from the lathe.
Term
 If you take a trial cut at each end of a workpiece held between centres and find that the cut at the tailstock end is 0.010 inch smaller than the cut at the headstock end, you must adjust the tailstock:a) 0.010 inch away from youb) 0.010 inch towards youc) 0.005 inch away from youd) 0.005 inch towards you
Definition
 c) If you take a trial cut at each end of a workpiece held between centres and find that the cut at the tailstock end is 0.010 inch smaller than the cut at the headstock end, you must adjust the tailstock 0.005 inch away from you.
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