Sherline Products 1074 User manual

WEAR YOUR
FORESIGHT IS BETTER
THAN NO SIGHT
READ INSTRUCTIONS
BEFORE OPERATING
SAFETY GLASSES
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
8/11/20
All materials have a tendency to deect away from the
cutting tools when you are turning them in a lathe. This
tendency is especially noticeable on long, slender parts and
long pieces of bar stock. It makes it quite dicult to hold
close tolerances. The best way to hold a long part is with
a center mounted in the tailstock. However, for one reason
or another this is not always possible. As an example, it
may be a piece of stock that you want to center drill so
that you can mount it between centers, or it may be a part
where a center drill hole would ruin the looks of the part.
Whatever the reason, the steady rest provides a means of
supporting the part.
The Sherline steady rest has three adjustable brass blades
mounted in a holder that mounts on the bed of the lathe.
These blades can be set to the diameter of the part to provide
necessary support while it turns.
Another advantage of the steady rest that is often overlooked
is the fact that work that is held in position by the steady rest
turns concentrically with its outside diameter. This means
that concentricity is assured when working near the steady
rest because at that point it must be running perfectly true
despite imperfections in the way it is chucked or centered
at either end.
Use of the Steady Rest
The easiest way to set up a steady rest is to rst mount
the part to be machined in a collet or 3-jaw chuck. Then
mount the steady rest onto the bed of the lathe and slide it
over the free end of the part and up as close to the chuck
as it will go. The three blades of the steady rest can then be
adjusted in until they just contact the part, supporting it but
not binding it. For small diameter parts it may be necessary
to cut or le o the corners of the blades so they contact
the part without touching each other. While the blades are
close to the chuck, mark where the center of the small
diameter stock contacts the blade. Because the casting is
not extremely precise, the blades may not contact the part
at their center. This does not aect their function. File or
grind o the corners as needed so the blades contact the
part but not each other (See Figure 2).
Once the blades are set and locked in place, the steady rest
FIGURE 1—To drill a hole in the end of a long shaft, the lathe
is set up with a center drill in the drill chuck which is mounted
in the tailstock. The steady rest keeps the shaft from wobbling
and also assures that the hole will be concentric with the outside
diameter of the part.
Steady Rest
P/N 1074
FIGURE 2—A) Mark each blade where it contacts the part and
grind o corners for clearance. Note that the contact point may or
may not be at the center of the blade. B) All three blades can now
contact the part without their corners interfering with each other.
AB
SMALL
DIAMETER
PART
STEADY
REST
BLADES
REMOVE
CORNERS

P/N 1290
Parts List
NO.
REQ.
PART
NO.
DESCRIPTION
1 11740 Set of 3 brass pads
1 11750 Steady rest casting
1 11760 Steady rest bed clamp
3 40510 10-32 x 3/8" SHC screws
4 40660 #10 washer
1 40690 10-32 x 3/4" SHC screw
can be slid back out to support the free end of the part.
Tighten the steady rest bed clamp (P/N 11760) to snug
using the 10-32 x 3/4" socket head cap screw (P/N 40690).
Average clamping pressure should be enough to lock the
steady rest to the lathe bed.
If you want to check the accuracy of your set-up, you can
use a dial indicator mounted on the crosslide. Once you
are satised with the set-up, apply a drop or two of oil
where the blades come in contact with the part, and you
are ready to start machining. The Sherline steady rest will
accommodate work up to 1.75" diameter.
Thank you,
Sherline Products Inc.
NOTE: A steady-rest riser block (P/N 1290) is available,
which makes it possible to use the steady rest on the lathe
with the headstock and tailstock riser blocks in place.
P/N 1074, Pg. 2 OF 2
11740 x 3
40660 x 3
11760
40690
40510 x 3
40660
11750
P/N 1074 Steady Rest Exploded View