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The term arbor press originally meant a device to be used for pressing
arbors in and out. An arbor, with reference to the mechanical use of
the word, is a shaft or bar for holding cutting tools. Although the ar
bor press may have originally found its way into early machine shops
for this purpose, once there, it was found to be useful for a far wider
range
of
jobs, and its popularity grew quickly. Today few good shops
are without at least one, and chances are that one is a GREENERD.
Robert Greenerd developed and patented the arbor press in 1860. He
thought of this as a device to accurately press arbors on or off work
pieces.
job characteristic of the overhead shaft, and belt-driven machinery
era.
liar friend to many in the manufacturing field. It is now as basic a
tool as the bench vise. A special feature of
ability to exert a tremendous vertical force. This force is achieved
through a combination of the mechanical advantage of a long lever,
and the gear ratio of the pinion drive.
He
also had in mind pushing pulleys on to shafts, a frequent
Through the years, the arbor press has become an old and fami
the hand-arbor press is its
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THE ARBOR PRESS
□
Pinion Drive
Ram (or Rack)
a
K
Lever
□
Rotary Slotted Plate
Slot in Frame
The force derived from an arbor press is not an impact force such as
might be delivered by a sledge hammer blow, but a variable, verti
cal
force under the complete control of the user. Thus the surface of
the part, or the tool, is not subject to shock or damage.
The table of an arbor press is machined square to the vertical line of
ram. This feature ensures the proper working angle when tooling or
parts are put into the press. On nearly all models, the table is equip
ped with a slot. This slot allows shafts, broaches, or punches to slide
through the table. Most models have a rotating slotted plate which al
lows the user to press shafts of various sizes into holders or bushings.
In order to perform properly, an arbor press must be bolted down
either to a bench, or to a stand which is bolted to the floor. Mount
ing holes and bolts are provide for this purpose.
Frame
These, along with other features, and application ideas described in
this brief pamphlet, make an arbor press an invaluable general pur
pose tool.
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TYPES OF ARBOR PRESSES
LEVER
Simplest and most common type of hand-oper
ated presses. A lever passes through the pinion
drive, and assuming the lever is fully extended,
the maximum pressure a person can exert is in
120-140 lb. range. This weight times the pinion
gear ratio results in the total pressure.
RATCHET
This press always put the lever arm in the most
comfortable position for the final squeeze. The
handwheel on the left side of the ram allows
rapid rough positioning of the ram. This type
provides the speed of a pilot wheel while also
increasing the leverage.
PILOT WHEEL
Pilot wheels allow you to "spin" the ram dow^
This saves time and the bother of having to re
position the lever arm. One of the handles on
the wheel is always with in 60 degrees of ideal
position for exerting full downward pressure.
Many models offer more than one diameter pi
lot wheel.
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FLOOR MODEL
Floor model presses accommodate taller work
pieces and eliminate the need for a seperate
floor stand,
justable table.
i
COMPOUND GEAR
Higher ram forces are available with compound
gear presses. This type of press allows the opera
tor to apply greater pressures with less effort.
Pressure holding attachments are available on
this type of press.
TYPICAL ARBOR PRESS JOBS
BROACHING
The open gap frame and accu
rate ram travel make an arbor
press a handy and inexpensive
push broaching tool. Occasion-
I keyway broaching, round
ole broaching and deburring
are regularly done this way.
Ratchet lever models are select
ed for this job.
The model shown here has an ad-
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ASSEMBLY
The "feel" afforded by a hand tool
such as an arbor press is ideal for fussy
assembly jobs. Precision bearings are
frequently assembled by arbor presses.
The assembly and disassembly of shafts
such as electric motor shafts is a pop
ular use of arbor presses.
ARBOR PRESS R AM
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DIE TRYOUT
First part runs on new dies, saves
time and possible damage to dies.
Operator can observe performance of
the die and make prompt corrections.
BENDING
Short production runs for bending
angles are easily done with simple
fixtures. The sketch at left shows
such an operation.
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STRAIGHTENING
FORMING
Simple tools for forming can
be
fastened to the press ram
ith many
lugs. The arbor press is a help
ful tool in assembly depart
ments for bending brackets,
short tube sections, and plates.
interchangeable
Operator control over ram pres
sure makes an arbor press ideal
for straightening. Shafts warp
ed by heat treating are often
straightened by an arbor press
before final grinding. In the
sketch of a simple straighten
ing fixture, the shaft is in
dicated for run out in the fix
ture.
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! AN ARBOR PRESS IS JUST
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AN ARBOR PRESS UNLESS IT'S A l-
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■ GREENERD 1
Why? Because Greenerd arbor presses are built to high quality
machine tool standards. Here’s proof:
• Round ram with teeth cut to centerline to prevent cramping
• Heavy cast construction, ribbed for added strength
• One-piece, alloy steel pinion and shaft is heat treated for
added strength
• Lifelong accuracy without shimming
Bench models (with floor stands) available (’A to 12 tons
pressure) and floor models (7 to 12 tons pressure). Complete
line of standard lever, rachet-type or pilot wheel operated.
WRITE FOR CATALOG 102
^GREENERD
Manufacturers of Arbor Presses • Hydraulic Presses • Expanders
Greenerd Press & Maohine Company, Inc.
41 Crown Street, Nashua, New Hampshire
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Form G159 REV2-6M472
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