free web hosting | free hosting | Web Hosting | Free Website Submission | shopping cart | php hosting


MAIN

MODEL PAGE 2

MODEL CHASSIS

LATHE TURNING 1

LATHE TURNING 2

LATHE TURNING 3

OPERATING THE LAYOUT

Ersatz Ground Signals

TRANSISTOR THROTTLES I USE

SCALE SPEED

FURTHER PICTURES

OTHER PROJECTS

EXHIBITIONS


PASSES


TREVOR GIBBS MODEL RAILROAD PAGE 4

USING A LATHE FOR MODEL BUILDING


 

Why THIS Page...

This Page has been written for a friend many miles away, modelling quietly away building a loco from scratch as much as possible with a lathe and other tools which he has acquired for the purpose. I would also like to do the same one day but lack of patience or time I think would get the better of me. He has the lathe but not much experience... I am the other way around!

There also do not seem to be many pages around that detail how to use a lathe but of course I am not used to every machine possible available in the world. So this will be a generic treatise on using a lathe perhaps with a few model parts included for practice. While your lathe may not quite LOOK like this, the principal will be the same.

THE MAIN PARTS OF A LATHE

The four main parts include

HEADSTOCK   -    Where the work piece or "stock" is held and rotated from. Round rod or hexagonal        bar can be held in a three jaw clamping device, known as a "chuck". Square stock must be held in a four jaw chuck. A four jaw chuck can also be used to hold Round Stock which must be held "off centre" such as eccentric rods etc... but we are getting ahead of ourselves. Any item being turned must be held tightly.    

BED   -    The Bed of the lathe is the horizontal frame if you will which supports the tool post and carriage. The length of material you can handle is basically determined by the length of this bed. 

TOOL POST and Carriage  -   The support base for the cutting tools, providing a moveable cutting profile when the stock is rotated

TAILSTOCK  - Provides a means of support for longer pieces of stock. A tailstock can also be used to hold a drill chuck so that the stock can be turned from the end. 

Please pardon the crudity of my drawings here but they need to be as generic as possible for the different type of machines available

HOW A LATHE WORKS.

The simplest operation is drilling a hole in the end of a piece of stock. If you were using a power drill to drill a hole in a piece of material, the drill would be rotating as it cuts through to the other side of the material. In a Lathe the opposite occurs in that the drill remains stationary while the work piece being drilled is rotated about the drill.

The net result is the same because the drill is moving relative to the stock but the preparation required is a little more involved for a lathe.

The Cutting Tool is placed in the Tool Post like so... 

The Black circles represent tightening screws which must be very firmly tightened. Now turn the tool post by loosening the main clamping screw so that then cutting edge will have clearance when it is "delivered" to the rotating workpiece

Notice the clearance between the cutting edge point and the surfaces of the stock material. This is exaggerated but indicates the idea of clearance needed. Make sure that the cutting edge point is aligned with an imaginary line between the centre.

LET'S DO OUR FIRST OPERATION

1. Select a piece of round stock and put it tightly in your headstock chuck. Ensure it is firm within the chuck. 

MAKE SURE THAT YOU ARE WEARING SAFETY GLASSES BEFORE YOU START CUTTING!

2. Move the carriage in deliver the cutting tool to the centre of the face of the stock we are about to face off.

 

WIND THE CARRIAGE SO THAT A MINIMAL CUT TAKES PLACE WHILE THE MACHINE IS RUNNING... THEN BRING THE CUTTING EDGE OUT UNTIL IT CLEARS THE STOCK IN THE CHUCK OF YOUR LATHE. Ensure that you move the carriage slowly and smoothly as possible so that your surface is also smooth as possible

 

Your workpiece will be fully faced off when the entire surface is smooth and even takes on a polished appearance... We can then centre drill the end and turn a length or make a shape into the face. I am going to use the example of a steam engine smokebox front as our first model... Lets keep going...