User Manual

Installing the Air Spindle into the Headstock
Insert the air spindle body into the hole in the headstock
body and slide it down until the part of the body below
the knurled silver speed control portion is approximately
centered in the headstock. Using the 7/64" hex key provided,
tighten the 6-32 socket head screw to secure the spindle in
the headstock body.
Mounting the Headstock to the Saddle
Fit the headstock/spindle unit over the pin on the mill column
saddle. Make sure the alignment key (P/N 40260) is seated
in the slot in the saddle and align the corresponding slot in
the back of the headstock to fi t over the key. Tighten the
10-32 set screw (P/N 40540) in the side of the headstock
tab (P/N 89024). The point of the set screw will engage the
tapered groove in the pin to pull the headstock down tightly
against the saddle, using the alignment key to align it.
Connecting the High Speed Spindle Air Line
It is very important that you provide clean, dry air to run
your high speed spindle. Dirty and/or wet air will cause the
spindle to wear out prematurely. Follow the manufacturer's
instructions included with the spindle when connecting the
air lines. A compressor of at least 1.5 horsepower producing
about 90 PSI of air pressure is appropriate for this spindle.
Continuous high speed use requires about 3 cu.ft/min of air
volume. The manufacturer recommends a break-in period
for the fi rst 2-3 hours of use. During this period, restrict air
pressure to 50-55 PSI. Once broken in, do not use pressures
over 90 PSI, as this will also cause excessive wear.
If extending the air line provided, use 1/4" line up to 25' in
length. If length longer than that is needed, it is recommended
that you increase the line size to 3/8" to provide suffi cient
volume of air for the tool.
Precautions When Using the Spindle
Do not overload the carbide cutter by taking too heavy a cut.
In most cases it is not necessary to use the full 54,000 RPM
capacity of the spindle. 40,000-45,000 RPM will usually do
just as good a job, and the lower speed will extend the life
of your spindle bearings. Because you are using a brittle
carbide tool and the extremely high RPM, the wearing of
proper eye protection is of utmost importance.
Lubrication
The spindle manufacturer recommends using an air line
lubricator supplying SAE #10 oil at a rate of two drops per
High Speed Engraving Head
P/N 8900
SHERLINE
PRODUCTS
INCORPORATED 1974
8/1/12
SHERLINE PRODUCTS INC.
•
3235 Executive Ridge
•
Vista
•
California 92081-8527
•
FAX: [phone]
Toll Free Order Line: [phone]
•
International/Local/Tech. Assistance: [phone]
•
Internet: www.sherline.com
FIGURE 1—Exploded view with part numbers.
89001
40690
89010
89024
40540
89076
89075
40260,
Alignment Key
NOTE: The 89001 kit
includes the air spindle, 6'
of 1/4" air line, 7 grinding
bits, 3 carbide engraving
bits (assorted angles), 2
collet wrenches, oil, brass
quick-connect fitting and
an air line oiler fitting.
Spindle Speed
Control
—Rotate
knurled portion to
control speed.
minute. A lubricator fi tting is supplied with your spindle
kit. Also included is a small bottle of oil to get your started.
For long term use we recommend an air
tool lubricant such as the one available in
16 oz bottles from NAPA Auto Parts stores
as NAPA part number 765-1400 or the
equivalent from any other supplier.
Tool Posts
Tool Posts
For special tool posts to hold
the grinder horizontally on
the lathe, see page 186.
NOTE: Due to the high speed/low torque nature of air
spindles this product is recommended for engraving,
polishing and grinding only and not for machining.