Millhead Components & Functions
The photos below show the front and back of the millhead of the Smithy Granite machine.
The millhead holds the tooling necessary to perform milling and drilling operations. The
following section identifies the components and functions of the millhead.
A. Spindle Cover
- The spindle cover protects the spindle from dust and debris. It also
protects the operator from injury. The spindle cover should be in place whenever the
machine is in operation. The drawbar is located under the spindle cover.
B. Millhead Cover
- The Millhead cover protects the belt and pulleys of the millhead.
The cover should always be in place when the machine is in operation.
C. Quill Lock
- The quill lock locks the mill/drill quill in place during a horizontal milling
operation or while changing tools.
D. Mill/Drill Spindle
- The mill drill spindle is an R-8 taper. It holds and rotates the the
tooling used during milling and drilling operation. The spindle also moves in and out of
the millhead quill. The quill is an internal part which is not seen in this picture.
E. Drill Press Handles
- The drill press handles move the quill in and out of the mill
head during a drilling operation. Rotating the handles in a clockwise direction moves the
quill downward, out of the millhead casting.
F. Coarse Feed/Fine Feed Clutch
- Pulling out the coarse feed/fine feed clutch knob
engages the drill press handles/coarse feed. Pressing the knob in engages drill/mill fine
feed hand wheel. To easily engage/disengage the clutch, rotate the drill press handles
slightly while pulling/pushing the knob.
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Figure 4.3 Granite Millhead (Front & Back)
4: Machine Overview
4-3
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