Sherline 5000 Mill Assembly Instructions
-25-
GUIDE TO APPROXIMATE TURNING SPEEDS
Material Cut Speed 1/4" (6mm)1/2" (13mm)1" (25mm)
S.F.M. Diameter Diameter Diameter
Stainless, 303 67 1000 RPM 500 RPM 250 RPM
Stainless, 304 50 800 400 200
Stainless, 316 47 700 350 175
Steel, 12L14 174 2600 1300 650
Steel, 1018 87 1300 650 300
Steel, 4130 82 1250 650 300
Gray Cast Iron 57 900 450 220
Aluminum, 7075 400 2800 2800 1400
Aluminum, 6061 375 2800 2800 1400
Aluminum, 2024 268 2800 2000 1000
Brass 400 2800 2800 1400
FIGURE 41—Turning speeds for high-speed steel
cutting tools
Keep in mind that, apart from possible production of
excessive heat and the fact that excessive speed may
damage the cutting edge or cause it to “rub” instead of
cutting, turning speeds are not too critical. Slower than
normal speeds cause no harm, except by increasing the
time involved. Aluminum, however, usually gives a better
finish turned at high speed and with the use of lubrication
(coolant).
ACCESSORIES FOR THE LATHE
Your lathe can be made more versatile with the addition of
suitable attachments and accessories. These include various
chucks and collets, a thread-cutting attachment, vertical
milling column, knurling tool, a live center and many others.
Remember that accessories and attachments must be cared
for in the same way as the lathe. Always make sure that
threads are free from metal chips and dirt. Chucks should
be lightly oiled frequently so that they continue to function
smoothly and accurately. Gears in the thread-cutting
attachment should be lightly greased when in operation.
Some attachments have moving slides, and these should be
lubricated in the same way as the slides in your lathe. Each
accessory comes with complete instructions for its use when
it is purchased.
Following are shown some of the more popular lathe
accessories along with a brief description of their purpose.
When parts are available in both inch and metric
configurations, the inch part number is given first followed
by the metric part number in parenthesis.
3-JAW, 4-JAW AND DRILL CHUCKS
Chucks are used to hold work in the lathe. They can also
be used to function like a vise to hold a part for milling.
Drill chucks can be used in the lathe headstock or tailstock
or in the mill for drilling. Here are some of the chucks
available for your Sherline tools:
P/N 1041 2.5" 3-jaw chuck—Three jaws
scroll in unison to grip round or hex stock
from 3/32" (2 mm) up to 1-3/16" (30 mm)
in diameter. Jaws are reversible for
holding larger stock up to 2-1/4" (56 mm)
in diameter. The chuck has a .687" (17 mm) through hole
and 3/4-16 spindle thread.
P/N 1040 3.1" 3-jaw chuck—This is a larger version of the
P/N 1041 chuck. It holds parts up to 1-1/2" (38 mm) in
diameter in normal position and up to 2-3/4" (70 mm) with
the jaws reversed. Same through hole and spindle thread.
P/N 1075 2.5" 4-jaw self-centering chuck—
This chuck holds round or square stock
from 3/32" (2 mm) up to 1-3/16" (30 mm).
With the jaws reversed, it will grip stock
up to 2-1/4" (56 mm). The jaws scroll in
unison as on the 3-jaw chuck. (NOTE: stock held in this
chuck must be perfectly round or square to be gripped by
all four jaws.)
P/N 1044 2.5" 4-jaw (independent) chuck—
Each jaw is adjusted independently,
allowing precise adjustment for perfect
centering or for holding odd-shaped
parts. Four-jaw chucks take a little more
time to use, but offer much greater
accuracy and versatility than a 3-jaw chuck. Holding range
is the same as the P/N 1041 3-jaw chuck.
P/N 1030 3.1" 4-jaw (independent) chuck—A larger version
of the chuck above for holding larger work. Holding range
is the same as the P/N 1040 3-jaw chuck.
P/N 1072 1/4" Jacobs drill chuck—A
conventional Jacobs drill chuck fitted
with a #0 Morse arbor so it can be used
in the tailstock for center drilling parts.
It also comes with a #1 Morse arbor
and drawbolt so it can be used in the headstock on the
lathe or mill. Adjustment key included. Holds drills from
1/4" down to about 1/64", although for drills smaller than
1/32" we recommend our 5/32" chucks (See P/N 1010/
1015 below).
P/N 1069 3/8" drill chuck—A larger size Jacobs chuck with
arbors for use in either the headstock or tailstock. It is
recommended for the long bed lathe, where the greater
center-to-center distance allows the use of larger drills and
reamers. Adjustment key, arbors and drawbolt included.
P/N 1010/1015 5/32" drill chuck—A small Jacobs chuck that
holds drills from 5/32" down to #80. The arbors are pressed
into a #0 Jacobs taper, so separate chucks are needed for
the headstock and tailstock. P/N 1010 has a #1 Morse
taper for the headstock, P/N 1015 has a #0 Morse taper
for the tailstock. The chuck’s small size can also make it
the proper choice for some setups where space is limited.
Adjustment key included. Drawbolt included with P/N 1010.
THREAD-CUTTING ATTACHMENT, P/N 3100
Common threads are most easily cut using taps and dies,
but it would be impossibly expensive to own a tap and die
for every conceivable thread size. Cutting threads on a
lathe is the traditional alternative. A lathe cuts threads by
gearing the leadscrew directly to the spindle. This is called
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