Term
|
Definition
| Engine, Computer Numerically Controlled (CNC), Turret, Automatic(Single or Multi Spindle), Tracer |
|
|
Term
| Name 4 ways a Lathe can be sized |
|
Definition
They are sized by:
-Largest Diameter that can be swung over the ways
-Longest Length between centers
-Some Larger Lathes will have a Horsepower rating
-Length of Bed |
|
|
Term
| Name the main parts of an Engine Lathe. |
|
Definition
| Bed, headstock, quick-change gearbox, carriage and tailstock. |
|
|
Term
| Name the three common types of spindle noses. |
|
Definition
| Camlock, Taper & Key, and Threaded |
|
|
Term
| Where is the feed reverse lever found? What does it do? |
|
Definition
| The feed reverse leaver is found on the headstock, it reverses the feed direction of your cross slide and carriage. (Foward or Backwards, Towards Headstock or Towards Tailstock) |
|
|
Term
| What is the purpose of the quick change gear box? Where is it found? |
|
Definition
| The quick change gearbox is used to adjust your feed rates, it is found under the headstock. |
|
|
Term
| What is the purpose of the feed rod? |
|
Definition
| It transfers power from the quick change gearbox to gears in the carriage. |
|
|
Term
| What is the purpose of shear pins and slip clutches? |
|
Definition
| To the protect the feed mechanism from sudden shocks. If the shear pin breaks replace the broken pin with a new one. |
|
|
Term
| Name the parts of a Carriage. |
|
Definition
| Saddle, Cross-Slide, Apron, Controls. The compound rest is just an attachment to the carriage NOT part of it. |
|
|
Term
| Where is a tool post mounted on the compound rest? |
|
Definition
| It is mounted to the compound rest using the T-Joint |
|
|
Term
| When your feed is engaged and you want to turn off your lathe what lever should you set to neutral before powering it down? What is the exception to this rule? |
|
Definition
| You should put your feed directional lever in neutral. The only exception to this rule is while knurling. |
|
|
Term
| How is the spindle locked in place? |
|
Definition
| The spindle is locked in place with the spindle clamp. |
|
|
Term
| When is a centre live? When is it dead? |
|
Definition
| A centre is live or dead based on where it is placed. A centre in the headstock is considered live. A centre in the tailstock is dead. |
|
|
Term
| What % of our salary is owed to Brad as a finders fee? |
|
Definition
|
|
Term
| Is a revolving centre in the headstock live or dead? |
|
Definition
| Trick Question. A revolving centre should only be used in the tailstock. |
|
|
Term
| What are the 4 main types of Lathe Dogs? |
|
Definition
| Standard Bent-Tail, Straight Tail, Safety Clamp, Clamp |
|
|
Term
| What engages a standard bent tail lathe dog? |
|
Definition
| It is engaged by a slot in the drive plate. |
|
|
Term
| What engages a straight tail lathe dog? |
|
Definition
| A pin on the drive plate. |
|
|
Term
| What is the purpose of a safety clamp lathe dog? |
|
Definition
| It is to protect the finish of a workpiece where a set screw on a regular lathe dog might damage the surface finish. |
|
|
Term
| What is the purpose of a clamp lathe dog? |
|
Definition
| The clamp lathe dog can be used on larger diameters as well as on square or oddly shaped work. |
|
|
Term
| What is characteristic of a drive plate? |
|
Definition
| It is a flat disk that attaches to the spindle nose, it has groves and pin to engage and turn lathe dogs. |
|
|
Term
| What is the most secure type of workholding device? |
|
Definition
| Chucks are the most secure workholding device, they also transmit more drive power than centres and a lathe dog. |
|
|
Term
|
Definition
| Chucks are sized on the diameters of the chuck body. |
|
|
Term
| What are workholding devices classified as? |
|
Definition
|
|
Term
| What are the 2 main benefits of a 4 jaw chuck? |
|
Definition
| The jaws on a 4 jaw chuck move independently allowing it to be adjusted until it runs perfectly true. It also has an extremely high holding power. |
|
|
Term
| What are 2 concerns when using 4 jaw chucks? |
|
Definition
| The concerns are that it can easily damage surfaces of workpieces held tightly in the jaws. It can also undergo catastrophic failure and explode at very high RPMs. |
|
|
Term
| When are collet chucks used? |
|
Definition
| When the outside surface of a workpiece must turn true to the axis of the lathe spindle. They are used on lathes when the size of the workpiece is small and the turning rpm exceeds the safe operating limits of a jaw chuck. |
|
|
Term
| What is something necessary when using faceplates? Why is this thing necessary? |
|
Definition
| Counterbalances are required to balance the faceplate. Otherwise the lathe will vibrate causing poor surface finish and loss of accuracy as well as safety issues. |
|
|
Term
| What is the purpose of mandrels? |
|
Definition
| To grip a workpiece by it's bore. |
|
|
Term
| What is the taper per foot of a standard solid taper mandrel? |
|
Definition
| 0.006"-0.008" taper per foot |
|
|
Term
| How do you tell which is the large end of a mandrel? |
|
Definition
| The large end of the mandrel is always stamped with its size. |
|
|
Term
| When using a mandrel to machine a workpiece which end of the mandrel do you machine towards? |
|
Definition
| You would machine towards the larger end of the mandrel. |
|
|
Term
|
Definition
| A cathead is used to provide a true surface for a steady rest when the workpiece is not round. |
|
|
Term
|
Definition
| Spiders are used when a long tubular workpiece require a centre but the inside diameter is too large to run on the centre. |
|
|
Term
| Where is a steady rest clamped? |
|
Definition
|
|
Term
| Where is a follower rest fastened? |
|
Definition
|
|
Term
| What are the 3 main ways a taper can be cut? |
|
Definition
| Compound Rest, Tailstock Offset, Taper Attachment |
|
|
Term
| What are the two types of taper attachments? Which one has backlash? Which requires you to disengage the cross feed? |
|
Definition
| The telescoping and plain. Backlash should be taken into account when using the telescoping taper attachment. The cross feed is disengaged when using the plain taper attachment. |
|
|
Term
| What do you use to set your depth of cut(DOC) when using the plain taper attachment? |
|
Definition
| You use the compound rest set at 90 degrees to the workpiece |
|
|
Term
Determine when to engage the split nut in the following scenarios?
A) Even Number of Threads Per Inch
B) Odd Number of Threads Per Inch
C) Fractional Number of Threads Per Inch
D) Threads which are a multiple of the number of the number of threads per inch in the leadscrew
E) Metric Pitches |
|
Definition
A) Engage at any graduation on the dial
B) Engage at any main division
C) 1/2 threads (1¼ 1½ etc) |
|
|
Term
| How should a tool be held in an american standard toolpost? |
|
Definition
| Short and fat with as little overhang as possible. (Short and fat is where it's at) |
|
|
Term
| What are 4 standard toolholders for american standard toolposts? |
|
Definition
| Left-Hand offset, Right-Hand Offset, Straight, Carbide |
|
|
Term
| What is the backrake angle of an american standard toolholder? |
|
Definition
| 16.5 Degrees (16 Degrees 30 Minutes) |
|
|
Term
| When picking a boring bar what should you consider? |
|
Definition
| You should always pick the largest diameter of boring bar that will fit in the bore and mount it as short as possible. |
|
|
Term
|
Definition
| Knurling is pressing the surface of a rotating workpiece to form a pattern of small ridges or points. |
|
|
Term
| What is the purpose of a Diamond Knurl? What about a straight knurl? |
|
Definition
| A diamond knurl is for grip and appearance. A straight knurl is increase the diameter of the work piece. (Possibly a press fit application) |
|
|
Term
| What is a general rule of thumb for rpm and feeds for knurling? |
|
Definition
| The general RPM Should be 100 and the feeds should be 0.015" for fine knurls, 0.020" for medium knurls and 0.030 for coarse knurls. |
|
|
Term
A stylus bears against a template and controls the cutting tool on a:
a) an engine lathe.
b) a tracer lathe.
c) a digital readout system lathe.
d) a single spindle automatic lathe. |
|
Definition
| b) A stylus bears against a template and controls the cutting tool on a tracer lathe. |
|
|
Term
The size of a lathe is determined by:
a) the size of the hole in the headstock
b) the horsepower of the motor and its capicity for metal removal
c) the maximum distance between centres
d) the maximum distance between centres and the amount of swing |
|
Definition
| d) The size of a lathe is determined by the maximum distance between centres and the amount of swing. |
|
|
Term
The compound rest may be rotated:
a) 180 degrees
b) 60 degrees
c) 360 degrees
d) 90 degrees |
|
Definition
| c) The compound rest may be rotated 360 degrees. |
|
|
Term
The feed reverse lever reverse the movement of the:
a) carriage and cross-slide
b) cross-slide and compound rest
c) compound rest and tailstock
d) tailstock and carriage |
|
Definition
| a) The feed reverse lever reverses the movement of the carriage and cross-slide |
|
|
Term
The feed direction lever:
a) changes the direction of carriage feed from forward to reverse
b) changes from threading to feed and back again
c) changes from carriage feed to cross-slide feed and back again
d) starts the leadscrew turning or the feed rod turning, but not both. |
|
Definition
| c) The feed change lever changes from carriage feed to cross-slide feed and back again. |
|
|
Term
The thread chasing dial is used to
a) change the pitch of the thread being cut
b) change from a right-hand to a left-hand thread
c) determine when the thread has reached its full depth
d) time when to engage the split nut when cutting a thread |
|
Definition
| d) The thread chasing dial is used to time when to engage the split nut when cutting a thread |
|
|
Term
The follower rest has:
a) three adjustable jaws
b) two adjustable jaws
c) one adjustable jaw
d) three jaws, non-adjustable |
|
Definition
| b) The follower rest has two adjustable jaws. |
|
|
Term
| In american standard tooling a left hand offset toolholder holds what type of tool? What about a right hand offset toolholder? |
|
Definition
| A left handed offset toolholder holds a right handed cutting tool, a right handed holds a left handed. |
|
|
