Priest Tools Sieg SX2 User manual

Spindle Brake Basic Hi-Torque Mini Mill (Sieg SX2) Installation Guide
© Copyright Priest Tools Page 1 11/30/2015
Thank you for purchasing the Spindle Brake from
Priest Tools. I developed this tool to improve the
productivity of performing tool changes, and to make
tool changes easier and more convenient.
Your new Spindle Brake is made from 6061 Aluminum
and is machined to exacting specifications in state-of-
the-art CNC machining centers. The Spindle Brake is
a very high quality tool that works well and is a great
addition to your collection of mill accessories.
I am very interested in your feedback on this product.
Please email me with your questions, comments, or
concerns at [e-mail]. If requested, I will
respond to your inquiry at my earliest opportunity.
I hope you enjoy using the Spindle Brake from Priest
Tools for many years to come.
Greg Priest
Owner, Priest Tools
What’s Included
Hardware
1. Spindle Brake plate
2. 5-.8 x 25mm socket cap screws w/ Nylon patch (3)
3. 1/4-20 x 3/4" socket set screws w/ Nylon patch (3)
4. Instructions
Tools required for installation
1. 4mm hex wrench
2. 1/8” hex wrench
Caution
Obviously, never operate the mill with the locking pin
engaged with the spindle through the spindle Brake
Plate or otherwise.

Spindle Brake Basic Hi-Torque Mini Mill (Sieg SX2) Installation Guide
© Copyright Priest Tools Page 2 11/30/2015
1. Disconnect power to mill.
2. Remove tooling from spindle.
3. Raise mill head to near its
highest point.
4. Remove 3 M5-.8x8 cap
screws and plastic bearing
cover from the underside
of the mill around the
spindle.
7. Check the operation of the spindle locking pin with the Spindle Brake
plate to make sure the locking pin operates smoothly and engages in the
spindle locking pin hole. If not, refer to the following Height Adjustment
procedure. Otherwise, congratulations, installation of your new Spindle
Brake is complete!
Height Adjustment
Use this procedure if the Spindle Brake is not in alignment with the spindle
lock pin hole causing the spindle lock pin to not engage (lock) the spindle.
Due to manufacturing variance of the vertical position of the spindle lock pin
hole, it may be necessary to use the 3 Socket Set Screws (SSS’s) located in the
Spindle Brake plate to space the plate slightly away from the mill head so that
the spindle lock pin hole aligns with the Spindle Brake.
a. Start with the Spindle Brake mounted to the mill.
b. Sight through the hole in the side of the Spindle Brake to see how far off-
center the spindle lock pin hole is.
c. Unscrew all 3 Socket Cap Screws (SCS’s) that hold the Spindle Brake plate
to the mill head, evenly and far enough so that the spindle lock pin hole is
in the center of the hole in the side of the Spindle Brake.
d. Tighten the Socket Set Screws (SSS) evenly until they come in contact with
the spindle bearing surface recessed within the mill head.
e. Tighten the SCS’s.
f. Check the operation of the spindle lock pin with the Spindle Brake to see
if it engages properly with the spindle lock pin hole.
g. If the spring plunger engages properly with the spindle lock pin hole, then
this procedure is completed. If not, then repeat this procedure making
fine adjustments with the SSS’s/SCS’s until the spindle lock pin engages
properly with the spindle lock pin hole.
5. Slide the Spindle Brake Plate
down over the spindle with
the rounded-edge facing
down and the hole for the
locking pin to the right.
Important note: do not
repetitively tighten, loosen,
and re-tighten the socket cap
screws as this will decrease
the effectiveness of the nylon
patch on the screws.
6. Insert the spindle locking pin
through the side hole and
rotate the spindle until the
pin engages. With the pin
engaged with the spindle,
align the Spindle Brake Plate
so that the locking pin
operates smoothly, and then
completely tighten the plate.