Understanding Lathe Machine Carriage
Carriage is
located between the head stock and tail stock on the lathe bed guide ways. It can
be moved along the bed either towards or away from the head stock. It has
several parts to support, move and control the cutting tool. The parts of the
carriage are:
a) Saddle
b) Apron
c) Cross-slide
d) Compound rest
e) Compound slide
f) Tool post
Saddle:
It is an “H”
shaped casting. It connects the pair of bed guide ways like a bridge. It fits
over the bed and slides along the bed between head stock and tail stock. The
saddle or the entire carriage can be moved by providing hand feed or automatic
feed.
Cross slide:
Cross-slide is
situated on the saddle and slides on the dovetail guide ways at right angles to
the bed guide ways. It carries compound rest, compound slide and tool post.
Cross slide hand wheel is rotated to move it at right angles to the lathe axis.
It can also be power driven. The cross slide hand wheel is graduated on its rim
to enable to give known amount of feed as accurate as 0.05mm.
Compound rest:
Compound rest is
a part which connects cross slide and compound slide. It is mounted on the cross-slide
by tongue and groove joint. It has a circular base on which angular graduations
are marked. The compound rest can be swiveled to the required angle while
turning tapers. A top slide known as compound slide is attached to the compound
rest by dove tail joint. The tool post is situated on the compound slide.
Tool post:
This is located
on top of the compound slide. It is used to hold the tools rigidly. Tools are selected
according to the type of operation and mounted on the tool post and adjusted to
a convenient working position completed in a shorter time because the required
tools are preset.
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