User manual

Parts Identification and Description (Continued)

Worktable The Worktable is a machined casting 240mm long by 145mm wide. There is a

dovetail section machined in the underside to mate with the traverse slide.

There are 3 x 8mm open ended ‘T’ slots machined in the table along its

length, to facilitate the fixing of machine vices or clamps. The worktable is

mounted onto the traverse slide. The right end face of the worktable has a

housing machined in it to mount and anchor the drive shaft assembly.

Worktable drive The Worktable slide is driven using the wheel and rod handle at the end of

control the table. Behind the boss of the handle is a graduated ring (thimble) so that

the movement of the worktable can be measured. The thimble is held to the

drive shaft by friction, and can be pre-positioned to establish a predetermined

start or stop dimension.

Milling head This is the ‘milling machine’ and the descriptions of its various parts

and components are detailed as follows:-

Milling head The main casting to which all the components are attached. The head has a

casting dovetail housing machined at the rear, which allows the casting to be fitted to

the Main Tool Post. The left side of the dovetail slide is fitted with a gybe strip

to maintain the fit.

Head clamp Similar to the traverse and longitudinal slides, centrally located between the

and scale gybe strip adjusters and locknuts is an M4 bristol handled bolt that clamps

the gybe strip against the slide to effect a locking action for the rise and fall of

the head. In the same location is an adjustable pointer which reads against

the scale mounted on the main tool post, to enable the head to be moved

against a reference point.

Rise and fall An ‘L’ shaped casting that is threaded to accept the rise and fall drive screw,

drive screw dog and is driven along the thread when the screw is turned. As it is bolted to the

milling head, the head will therefore follow its movement as it is being driven.

Motor and The motor and gearbox assembly are mounted above the main head casting

gearbox at the top of the arbor sleeve. The motor drive is geared through to the

spindle with an intermediate 2:1 gearbox.

Gear change The gear change knob allows the selection of the high or low ratio of the gear

knob train. The speed of the spindle is then governed by the speed control on the

motor panel. (You may have to ‘joggle’ the chuck/tool to aid the meshing

action).

Motor A 220V d.c. motor rated at 150W.

Feed Handle Lever handle that is used to drive the quill (and hence the chuck or the tool)

up and down. The boss of the handle is fitted to the end of a ‘splined’ gear

shaft. This ‘splined’ gear is, in turn, engaged in the rack cut into the quill

body. There is a counter balance spring in the arbor and sleeve assembly,

giving a more controlled ‘feel’ during drilling operations. It also retracts the

quill when drilling is completed.