Clausing Manual Lathe

Notice any difference?

On this machine forward and reverse depend on whether you are threading or feeding. (two sets of arrows on this type of lathe)

On this machine, a change from forward to reverse means that both threading and feeding change to reverse. (only one set of arrows)

Taper in inches per foot

Taper in approximate degrees

Screw for taper attachment arm

Taper attachment lock screw

Through-spindle bored to pass up to 2.125"

Right side of taper attachment

These are the Forward / reverse lever and the feed selection levers / dial.

Other parts of taper attachment

Left side of Taper attachment

Spindle speed selector dial

Do NOT adjust Spindle speed selector dial while spindle is running!

Top(ish) view with taper attachment highlighted

Left side view

Line up all three color sections to choose a spindle speed. This shows the speed set for 260 RPM

The change-gears are behind this cover

IMPORTANT!!!

Adjust forward/reverse lever, feed selector levers and dial at 140 RPM or below!!!

If you feel resistance when changing speeds, try putting spindle in neutral and turning chuck by hand while moving lever.

Spindle engagement lever makes the spindle turn forward or reverse.

Reverse

REMEMBER!!!

Adjust forward/reverse lever, feed selector levers and dial at 140 RPM or below!

Forward

Feed direction

Threading direction

Excellent trivia question: This is called the "third rod". The spindle engagement lever attaches here.

Carriage / saddle / apron

Direction change lever

Let's look at it again.

Carriage... feed

Cross-slide... feed...

Is about... half of...

Quick-change tool post

The feed data plate tells you where to set the gearbox for specific feeds or thread pitchs (depending on what mode you are in)

In case you are lost, the compound is located on top of the cross-slide

Do not over-tighten

Micrometer stop

An accesory used for repeating precise stopping points during lathe travel. (Un related to feeds and speeds)

Here is a closeup of the feeds and speeds area

Rack

Compound is direct-reading

Degree scale

Leadscrew

Feed selector levers

This is what the change gears look like

Way too much overhang!

Engine on

button

Coolant on/off

(Not used)

Emergency stop

(rotate in direction of

arrows to release)

What do you suppose this means?

(more on this later)

Splineshaft

Compound

lock screw

Neutral button

Feed selector dial

Carriage lock

Cross-slide indicates in diameter

Neutral button

Clausing / Colchester 15" Manual Lathe

Gear set chart

(To configure change gear)

Remember these symbols?

Feed direction (axis) selector tells the carriage to feed side-to-side (Z axis) or the cross slide to feed front to back (X axis) Not all machinists agree on these axis designations but if you look at the arrows you can tell which position does what.

Almost all the gears are marked but some are in backwards so the marking is on the back side and some are just plain hard to read. This bigger one is a 95 tooth gear

This smaller one is a 36 tooth gear

Automatic feed can be used with the crosslide or the saddle. this push-pull knob is used to select which axis automatic feed should move. In the middle position, it is set for threading.

This quick-reference plate tells you on what number to engage the half-nut lever.

"Half-nut lever" also sometimes called "leadscrew lever". this is used to engage the carriage for threading

Thread dial indicator is used in conjunction with the quick reference above and the half-nut lever.

This is the digital readout (DRO) on this lathe.

This is how you clear ou the flashing "REF" symbol to use the DRO

You can see a different style of DRO on the lathe behind this one

Feed engage lever

Oiler piston knob

This is the tailstock / ram

This is gear set "F"

But not until the threading dial reads the proper number for the thread you are making

(No spoken audio)

This is the spindle/chuck area

This area is where the feeds and speeds are set.

In this area is the carriage, saddle, apron, tailstock and ram.

Always check for

oil flow in this

sight glass before

cutting metal.

All of our chucks are

mounted to the spindle

using these lock bolts

This moves all three jaws in unison on this particular three-jaw scroll chuck

This is the Front view of

the tailstock / ram

Gear set chart. This shows where to put the gears and how many teeth each gear should have.

Tailstock advance

dial

Chuck jaws are numbered on chucks where order makes a difference.

Notice the location of the line in realtion to the other line and arrow. If the lines are together then the chuck is NOT SECURE.

Ram

Tailstock

handwheel (advances ram)

Tailstock (rear view)

Ram lock lever

Tailstock lock lever

This is a four jaw universal chuck

Each jaw is operated independently

of the others

Tailstock

stepover screw

Tailstock stepover indicator

This is a collet chuck.

It is tightened by turning

this ring

Collets go in here.

In this case, a 5C collet.