Precise,
Efficient,
Maintainable,
Dependable,
and Fast! It's
about your Business!





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The
8-Spindle Model
844
"New Machine Advantage"
Product
Data Sheet
S&M
Model
844
Eight
spindle, 1-1/8” Screw Machine
Machine
Design:
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In the tradition of the S&M 654.
Proven strong, tough and rugged, fast and efficient. Built to boost productivity and efficiency, to leverage
existing tooling, parts, and setup technician experience. A machine to support efforts to produce precision parts at
lower cost.
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Base
and housings:
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High
Strength, heavy castings for rigidity.
Castings are US made and machined by S&M
for
quality and accountability.
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Gearbox:
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All Gear Drive, no belts, no “timing” type chain.
Gears are hardened and precision ground to “aircraft quality”.
Model
844 operation
is extremely smooth and quiet, more pleasant operator conditions, less
operator fatigue.
Electronic High Speed for indexing – no
clutches.
Power “Jog Forward” and “Jog
Reverse” in Setup Mode for fast and easy setups and adjustments.
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Available
Tool Positions:
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·
As
many as seven (7) stationary, three (3) sliding, and one (1) inverted
positions.
·
Up
to four (4) auxiliary slides.
· Front
and rear pickoff allows two (2) backworking positions.
·
Speed
and tap in seven (7) positions.
·
Tool
slide and cross slide feed rates are controlled electronically.
· Spindle
RPM is electronically controlled.
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Tooling
Availability:
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Tool
mounts are common with the S&M 654 and New Britain. The majority of New Britain 52 cross slide tooling can be
used with little or no alteration. Very
common, readily available tooling! With
industry standard design and components,
the Model
844
is
a very serviceable machine.
Accepts
the same cross slide and tool slide cams as the S&M Model
654
and the New Britain 52.
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Electronic
Controls:
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Operator
Control Panel on the front AND rear of the machine for safety, efficiency,
and versatility.
Uses
“PLC Direct” brand PLC controls, market leader (see PLC control
section). Simple
to use yet powerful control systems.
Spindle rpm, tool slide and cross slide feed rates are
electronically controlled to allow FINE ADJUSTMENTS and easy “tweeking”
for optimum production and part quality.
Standard
displays include Parts Counter, Cycle Time, Feed Rate, Spindle RPM,
multiple Safety/Fault messages.
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Carrier:
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Compatible
with New Britain 51 collets.
Stock
size up to: 1-1/8” round,
1” hex. {If fitted with
an automatic bar loader, maximum round stock is 1-1/4”.}
Fast
index time, as low as 0.70 seconds, dependent upon rpm and stock size.
Sealed
spindles, equipped with Tri-Plex bearings and all-rubber Forsheda v-ring
seals to retain lube oil and exclude coolant for extended life.
Infinite
spindle rpm control up to 4,000 rpm allows fast, easy optimizing of
production, lowers cost per part.
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Stock
Reel, Stock Feed:
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Lightweight
Stock Reel allows faster indexing, is equipped with quiet type tubes.
Special lengths available. Adapts
to leading automatic bar feeder systems.
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Lubricant/Hydraulic
System:
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Hydraulic/Lubrication
system equipped with 3 hp continuous duty, direct drive, Tuthill pump.
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Chip
Conveyor:
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Chip
conveyor is
motorized chain and paddle type on heavy stationary bed for long life.
Optional perforated metal belt conveyor available.
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Footprint:
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Large
capacity, high production machine with a small footprint.
More production per square foot of floor space.
Same
footprint as the S&M
654
and New Britain 52. Base
casting is 48.5” by 10’7” (1.23m x 3.23m).
With stock reel, total length is 19’4” (5.9m).
Machine height is 5’8” (1.73m), highest point (status/alert
lights on control box top) is 7’5” (2.26m) above floor.
Machine
weight (standard config) 15,250 lb (6,913 kg) with stock reel.
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Machine
Availability:
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S&M builds machines in lots.
This means machines are often in stock or near completion.
Production units of Model
844
are ready for shipment.
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Power:
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220v
or 440v 3-phase. Main drive
motor is 30hp, Feed motor is 7.5 hp, Coolant Pump motor is 2 hp.
Optional high pressure coolant pump is 3 hp.
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Warranty:
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One
year (2000 hours), parts and labor.
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Parts
Support:
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Parts
are maintained in stock at our plant, most manufactured by our
people, on our own machines, completely under our control. This is the accountability you want in your suppliers!
Feel secure with S&M behind you!
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Customer
Inspection:
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Our
plant is open to customers and prospective customers who would like to
view our facilities and machines. We
encourage these visits.
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