Setting-up Tooling in the Mill/Drill Spindle
This section will explain tool mounting in the mill/drill spindle.
The mill spindle of the Granite 1300 series machines is an R-8 (Bridgeport®)
standard. It features a straight shank with a flared nose for centering the tool
and a keyway for alignment.
Aligning Tooling
Use the procedure below to align your tooling in the R-8 spindle:
Step 1:
Select the appropriate tool or fixture.
Step 2:
Wipe the surfaces of the tooling and spindle interior to ensure a
proper fit. Grease or debris on either surface will cause misalignment.
Step 3:
Align the keyway in your tooling with the key inside the mill spindle
and insert the fixture in the lower mill spindle opening.
You can feel the key in the mill spindle with your finger. It is located just beyond
the tapered portion of the spindle.
Securing R-8 Tooling with the Drawbar
Use the procedure below for the drawbar:
Step 1:
Remove the mill spindle cap located on the top of the mill belt cover
and insert a drawbar (SAE standard 7/16-20) from the top of the spindle.
Step 2:
Tighten the drawbar clockwise into the fixture or tooling that is
inserted into the mill spindle opening. Use the spanner wrench to stabilize the
spindle while tightening the drawbar.
Turret
Turret Lock
Figure 6.4 Compound Angle Toolpost Installed on Cross-Slide Table
6: Tooling Installation
6-4
Or Visit www.smithy.com
