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No. 2 MODEL A
BURGMASTER
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Page 2
SPINOLE SPEED CONTROL* An easily accessible speed control drum is mounted
the right side of the machine (as illustrated below). Each spindle is represented
a control knob enabling the operator to quickly set any of the 12 speeds, four
per spindle, ranging from 225 to 3000 RPM, in definite steps, as indicated on the
speed chart (back page). While one spindle is rotating at a pre-selected speed, the
remaining spindles are idle.
IN TERCHANGEABILITY OF TOOLS i/2" or %" capacity Jacobs chucks, #2 Morse Taper
sleeve, Burgmaster or Torquomatic lapping head, self-opening die head and any
other second operation tools are quickly interchangeable on any station by thread
ing them on or off the spindle nose which has a male %"-16 thread.
OPERATIONS;
Power to the spindles is transmitted from the motor by a universal drive
shaft. The indexing mechanism has its takeoff from the main drive shaft through
an overload clutch shaft, and when the operator brings the turret head to the up
permost
position, the movement
is engaged causing the cam shaft to turn. As it turns,
cams actuate levers which disengages the driving clutch and locating pin. At the
same time a gear on the cam shaft actuates the Geneva mechanism which indexes
the turret head, depth stops and speed control drum 60°. The locating pin then locks
the head in operating position. Time required per index, approximately one second.
CONSTRUCTION;
chine. Chuck spindles and shafts in gear box are mounted on Timken Bearings
Heavy meehanite, steel and iron castings are used throughout the ma
run-
ning in oil. Husky, hardened and lapped Helical gears assure quiet, efficient pow
er transmission. Adequate lubrication is provided at all wear points. All dovetail
ways are hand-scraped for accurate, smooth operation. These features mean low
maintenance cost per machine.
on
CHANGE
QUICKLY
THROUGH SIX INDIVIDUAL STATION
SECOND OPERATIONS
Spindles are mounted in opposed,
Class “O” adjustable Tapered
Roller Bearings, geared directly to
individual clutches by Helical
Gears with low, medium and high
gear ratios on opposite spindles.
Only the spindle in operating po-
sition is rotating while the remain-
ing spindles are idle.
Meehanite turret head is mounted
to a steel flange, which in turn,
is mounted in husky double-sealed
ball bearings.
Positive, pre-selective depth stops are con
veniently located for a quick setup and to
hold close tolerances on depth.
Husky, rigid slide moves freely in
hand-scraped dovetail ways which
provide maximum rigidity and
smooth operation. Counter-weight
balances weight of turret head,
slide and gear box providing sen
sitivity.
The
ram is traversed with
a powerful, yet sensitive
feed mechanism that op-
erates on rack and gear
principle. Feed handle
can be easily set for a
most
comfortable
position.
Metal guards shield
spindle during index-
ing.
Twelve pre-selective spin-
dle speeds are achieved
through the use of a 2-
speed motor, a 2-speed
clutch mechanism and 3
sets of gear ratios in the
turret head. To pre-se-
lect spindle speeds, turn
the control knob corre-
sponding to spindle num-
ber to any of the 4 po
sitions.
working
Rear view of slide and completely sealed
gear box, with shafts mounted on tapered
roller bearings, running in oil. Shaft “A”
connects to the main drive shaft and* ac
tuates spindles and index mechanism.
Shaft “B” drives the speed control drum.
• ;
-'. p
.
.
Shown is the rear of the slide: Geneva
movement plate is mounted to turret.
Heavy rack transmits movement from feed
handle to slide.
Front view of gear box’. (A) Geneva
crank. (B) Safety clutch shaft. (C) Cam
Shaft. (D) Locating Pin rocker arm. (E)
Clutch rocker arm. (F) Clutch movement
yoke and shaft. (G) Driving Clutch.
Back view of turret head illustrates the
positive jaw clutches, one clutch for each
spindle. As each spindle indexes into po
sition, the driving clutch engages that
clutch. Also shown are the adjustment
nuts which draw up the Timken Bearings
assuring absolute rigidity and accuracy on
any second operations.
Cutaway view of speed control. 6 knobs
on rotating drum cause floating clutch to
engage either the high or low speed pul
leys, and the motor
RPM; thus providing 4 speed changes.
to
run at 1 800 or 900
Shown are the completely enclosed gear
box, oil gauge, and filler hole. The feed
handles are positioned comfortably by
traversing the feed handle unit through
90° angle. The neoprene gasket seals the
locating pin slots. Drive to spindles and
gear box is taken from transmission box
through universal drive shaft.
Page 3
TRULY A UNIVERSAL PRODUCTION MACHINE
The #2 Model A BURGMASTER was designed
to lill a long felt need in the metal-working field
for a machine that would eliminate a large part
of wasteful handling, which research has proven
takes up as much
as 50% of machining time. The
universal adaptability and time-saving qualities
of the turret head on the BURGMASTER were
given prime consideration in designing, with the
result that a large variety of operations can be
performed on a part, at one station, with a mini
mum of handling and operator fatigue.
The fact that the turret head indexes quickly
by power from station to station,allows a num
ber of operations to be performed on a part with-
out moving it from one machine to another, with
resultant decrease in machining time and an in
crease in the quality of product.
Rugged, precise construction, adequate power,
a
wide range of pre-sclective spindle speeds, long
stroke, large work table, powerful yet sensitive
manual feed mechanism, and preselective depth
stops permit the use of large or small tools on
either large or small parts and any material.
Less machining time, less floor space and power,
adaptability to women operators plus low main
tenance and low initial cost.,, all add up to less
cost per piece machined jor
you.
SPECIFICATIONS
• %" DRILL CAPACITY
• %" NF TAP CAPACITY IN MILD STEEL
• 1 TO 2 H.P. — 3 PHASE —
VOLT —
• 8" TURRET TRAVEL
• 17" x 33" WORK TABLE WITH CLAMPING SLOTS AND
COOLANT TROUGH
• THROAT CLEARANCE
• SPINDLE RUNOUT: .003" T.I.R. AT 10"
FROM SPINDLE NOSE, ON 16" DIAMETER
• APPROXIMATE WEIGHT OF THE MACHINE: 1600 LBS.
• APPROXIMATE SHIPPING WEIGHT: 1850 LBS.
• FLOOR SPACE REQUIRED: 34"x36"—HEIGHT: 6 FEET
/
• POWER INDEX THROUGH GENEVA MECHANISM
2 SPEED MOTOR
:
60 CYCLE —
• 18" TABLE TRAVEL
— 11 %"
220 OR 440
a n a □ n
SPEED CHART SHOWING SPEEDS AVAILABLE AT
SPINDLES ON No. 2, MODEL A, BURGMASTER
WITHOUT CHANGING BELTS
;!
:
Spindle
No.
1
2
3
4
5
6
Speed Speed Speed
A
3000
2000
1300
3000
2000
1300 225
B
1500
1000
650
1500
1000
650
Speed
C
1000
675
450
1000
675
450
D
500
350
225
500
350
Tfteutufrzctcvtecl fly
BURG TOOL MANUFACTURING CO. 3743
durango ave
000
.,
los angeies
34,
calif
y
.
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