Page:Model engine construction, with practical instructions to artificers and amateurs (IA modelengineconst00alex).pdf/35

TOOLS USED IN MODEL ENGINE-MAKING. 15 diameter) with a graver or steel chisel, and, finished with a fine and oil, or emery cloth and oil, while still revolving in the lathe.

file

or

oil,

is

chucked,

chisel



After the metal is chucked, it is first "roughed down" with a graver to the required form;

first

it is

third, polished with emery

cloth and oil, and then removed from the lathe.

Fig.9 Be careful always when turning to use well-

sharpened chisels;

oil,

graver to the required form; second,

smoothed with a

emery cloth and

revolving in the lathe.

cloth and oil,

necessary to keep a good edge upon them. Chisels are of various shapes: some have a flat edge, others are bevelled, and others again taper to a sharp point at one end.

Of the last variety, it is best to have a right, and left-hand tool. Chisels

should be made of good square cast steel; old files