Instructions

DESIGN OF THE ANGLE PLATE
The angle plate attachment for the Sherline mill was
designed with help and many suggestions from Graham
Taylor of Livonia, Michigan. The multiple hole pattern
allows the rotary table or mill vise to be attached directly
to the table. Also included is a 3/4-16 adaptor which
attaches to the table, allowing you to directly mount Sherline
3-jaw or 4-jaw chucks to the angle plate as well.
THE IMPORTANCE OF MOUNTING THE PLATE
SQUARE WITH THE TABLE
The angle plate must be mounted square to the table. The
mounting hole layout should be reasonably accurate, but
for very close work, use an indicator to square the plate.
The movement of a plate tilting at angles can be very
confusing. It would be wise to consider how error can
accumulate by not having the table square. If square, as the
table is tilted a given point moves in relation to only one
axis but not the other. If not square, it moves in relation to
both axes, making accurate machining almost impossible.
For example, you might start a cut several thousandths
deep at one side of a part and end up cutting nothing at the
other side. To make this clear it is easier to picture what is
happening if you visualize an extreme case where the table
might be mounted 15° off from square. Picture the path
your cutter would make if you made a pass over a part
mounted that far off square and you’ll see what I mean.
Always make a sketch of your setup and make sure you
have the correct table angle. When using an end mill,
remember that the angle of the cut depends on whether you
are using the end or the side of the milling cutter. The
bottom of the cutter cuts the angle indicated on the angle
plate scale, while the side of the mill cutter cuts an angle
equal to 90° minus the angle set on the table. (See Fig. 1.)
Mounting the angle plate to the mill or lathe table
The hole pattern in the bottom of the angle plate has been
designed to pick up the T-Slots in the mill table or in the
crosslide table of the lathe when using the vertical milling
column attachment. Use the T-Nuts and socket head cap
screws in 4 of the 6 mounting holes on the bottom plate. Use
the 2 center and 2 of the end holes for mounting to the lathe
table. For the mill table, use all 4 end holes.
TILTING ANGLE TABLE
P/N 3750
SHERLINE
PRODUCTS
INCORPORATED 1974
FIGURE 1—The angle of your cut is dependant on whether
you are cutting with the side or end of your milling cutter.
MOUNTING HOLD-DOWN DEVICES
TO THE ANGLE PLATE TABLE
The hole pattern in the table of the angle plate has been
designed to allow you to mount any of several Sherline
holding devices. These include the rotary table, mill vise,
3-jaw chucks and 4-jaw chucks. This is why the hole
pattern looks a bit odd. You can also drill additional 10-32
holes to meet your own unique mounting requirements.
The following diagrams show which holes to use for
mounting each of the accessories. As an additional feature,
the rotary table location has been calculated so that when
rotated to the 90° position, it comes out at the same height
as the rotary table tailstock, which eliminates the need for
the P/N 3701 right angle attachment.
FIGURE 2—Mounting
points for the rotary table.
Solid black circles indicate
holes used for hold down
screws on this and the
following diagrams.
END MILL
MILLING
CUTTER
30°
30°
60°
ROTARY TABLE
1/20/05
SHERLINE PRODUCTS INC. ˆ 3235 Executive Ridge ˆ Vista ˆ California 92081-8527 ˆ FAX: [phone]
Toll Free Orders [phone] ˆ International/Local/Technical [phone] ˆ Internet: www.sherline.com