Page 1
No. 2
MURA-
WAY
TOOL.
GRINDER
Page 2
The NORTON No. 2 BURA-WAY Grinder
The NORTON No. 2 BURA-WAY Grinder is outstandingly
efficient
The machine generates, reproduces and maintains relief
constant as measured in the direction of feed.
for grinding convex single point ana form tools.
This provides
angles
the entire cutting edge of the tool with a uniform support
including those sections wherein curvature, a radius or radii
are involved. This unique capacity, plus the extreme rigidity
of the machine, its spindle reciprocating feature and manner
of tool support, result in a superior low cost long-life tool
and increased production.
The Universal Tool Holder supplied with the machine
holds tool bits up to 2" square shank. Set-ups are simple,
accurate; can
or two of time,
fixture is availahle.
be precisely duplicated, and take only a minute
For grinding the rake angle, a special
Angles ground are under positive control
and tool form is not changed, but is automatically maintained
with every regrinding.
In grinding profile and relief, an original or master
tool is used to generate a large-sized cam. This.cam is used
to duplicate any number of tools all precisely alike.
It is
also used to maintain and keep constant the correct profile and
relief angles with each regrinding of the tool.
is possible with this machine for the tool designer to design
the ideal tool that will have the longest life possible, and
Therefore, it
which will produce more pieces per sharpening. -
Carbide tipped tools ground with the NORTON No. 2
BURA-WAY Grinder have extremely long life when ground and
reground in this precision machine built to the most exacting
standards.
The exceptionally smooth operation of the machine
and the manner of tool support assure a smooth, keen cutting
edge, important to the life of the tool.
Page 3
1
2 Dressing Arm
3 Wheel Guard
4 Template
ic Control Panel
9 Wheel Drive Motor
10 Coolant Reservoir
5 Universal
Tool Holder
6 Tilting
Work Table
7 Wheel Feed
Hand Wheel
Setting
Vernier
11 Wheel Slide
12 Calibrating Block
■ '■ 13 Wheel Spindle
Reciprocation Lockout Lever
14 Universal Angle
15 Template Stop Bar
16 Coolant Tank
Gage
sk-oso
A modern grinder designed for grinding-
planing and similar work.
Long tool life and low maintenance costs
tion even with unskilled operators.
17 Table Tilting Hand Wheel
convex
are
single point and form tools for boring, turning,
combined with accuracy of shape and exact duplica-
Page 4
DESIGN
HIGHLIGHTS
1. Electric Control Panel Houses
Starters
For pump and wheel motors, push buttons at front
of cabinet
2.
Dressing
Wheel
maintaining location of wheel face with respect
to the calibrating block and cam stop
Arm
face trued by diamond on swinging arm
3. Wheel Guard
One piece guard reduces interference
Easily swivelled for grinding with either side of
wheel
4. Template
Placed and removed in a matter of seconds
Quantity of blanks furnished as standard equipment
Profile of template generated in exact relation to
tool as cutting edge of master tool makes contact
with master calibrating block
5. Universal Tool Holder
Precision made
Holds tool bits up to 2" square shank
Adjustable to and from wheel for stock removal
Adjustable laterally for side cutting edge
Main body is an aluminum casting
Barrel construction provides roll adjustment
Tilt adjustment 2.5° either way
Setting for roll and tilt quickly made
Protractor attachment furnished for establishing
edge angles on master tools (optional equipment)
6. Tilting Work Table (0
Table may be adjusted very quickly for any angle
up to ±10°
Meehanite casting with hardened top
Rigid construction
pT 1
0NAL )
10. Coolant Reservoir
Allows gravity feed of coolant to work
11. Wheel Slide
Supported on dove-tail ways with large support
area.
12. Calibrating Block Integral with
Gibs furnished for adjustment
Truing Arm
Used in making templates
13. Wheel Spindle Oscillation
Fixed oscillation of Yi'
Eliminates operator fatigue due to movement of
tool holder
Speeds up grinding time
Improves finish
14. Universal Angle Gage (OPTIONAL)
Establishes grinding position of tool in holder
15. Template Stop Bar
Has strip of Norbide (Boron Carbide) which is
hardest substance manufactured by man
Precise duplication assured
16. Coolant Tank
Extra large tank has capacity of 25 gallons
17. Table Tilting Handwheel (OPTIONAL)
Conveniently located (locking type)
7. Wheel Feed
Graduated handwheel, speedily positions wheel
(locking type)
Wheel slide type of construction
Index graduated to .0005"
8. Table Setting Vernier (OPTIONAL)
Accurate settings of table assured to 1' of arc
Graduations provided for angles up to 10°
9. Wheel Drive
1 h.p. totally enclosed motor
Spindle runs in precision bearings
Universal Tool Holder with Protractor Attachment Mounted
Page 5
Wheel Spindle
Design Details
The cartride type wheel spindle unit is arranged to
give a fixed oscillation of l/2
,r to the wheel in a lateral plane.
This greatly simplifies operating effort because the operator
merely has to hold the work holder in contact with the wheel.
He is spared the laborious task of moving the tool holder back
and forth across the wheel face.
oscillation
makes for better wheel life and gives better finish
This feature of wheel
to the tool.
Universal Tool Holder
The Universal Tool Holder can be tilted and rolled for
clearance and rake angles.
Because of this, it is possible to
attain the cylindrical type of grind rather than the conventional
conical grind, when the table is flat.
A Master Tool Protractor Attachment (an optional extra)
can be supplied which adapts the tool holder for grinding cutting
edge angle on model tools.
Grinding Model Tools
The NORTON No. 2 BURA-WAY Grinder makes possible the
grinding of a model tool.
With the Master Tool Protractor
Attachment and gage attachments which may be supplied as extras,
it is possible to make a model tool from a bar of plastic material
or soft steel.
the "Model Tool Process Chart
The various steps in this process are outlined in
” on the following page.
Templates
Once the model tool is made, a template is ground from
the model tool.
Thereafter, regular production tools can be
ground from the template and the shape or location of the tool is
always assured from one grind to another with absolute duplication
through an accurate mechanical means.
This is an exceedingly important feature, especially for
automatic machines using multiple tool set-ups.
to have such tools sharpened in the NORTON No. 2 BURA-WAY Grinder
It is possible
and then set back in the automatic machine quickly from a reference
point without going through the process of indicating each and
every tool.
Page 6
STEP 1
STEP 2.
STEP
3
STEP 4-
QRIND
5URFACE5 USINQ
UNIVERSAL ANQLE
C^A(qE
relief
BLUE
OF TOOL TO
BE (qROUND
PRINT
STEP 5
CQRIND TEMPLATE
FROM SHARP
CORNERED TOOL
IN STEP FOUR
BAR STOCK WITH
RAKE SURFACE
QROUND US1NQ
TOOL HOLDER OR CUTTINQ EDG)E5 CUTTING} EDG}E
*
U
0
h
i
n
O'
CO
u
z
<t
X
h
z
>:
in
STEPS
GENERATE RADIUS REQRIND TEM'
ON NOSE BY
RETRACTING} CqRIND- ROUND NOSED
1NQ WHEEL AND
us\n
G}T
RAKE GRINDING}
FIXTURE,
(
emplate"a
"
STEP 7
PLATE ^ A "FROM
TOOL IN STEP
six
ADD SCRIBE LINE QRIND END 5UR-
LOCATING^ INTER- FACES SQUARE
SECTION OF
AND TO CORRECT
ANGLES USINCq
PROTRACTOR ATT.
FINISHED TOOL
GROUND FROM
COMPLETED
TEMPLATE "b"
TEMPLATE STOP
j BAR (FIXED)
-"CALlBRATl Nq
(STOP ) BLOCK.
(FIXED)
1
Lmm
\
"A"
MODEL TOOL
QRINDINQ
/WHEEL
Z'*R
ADVANCE
TOOL
UN Tl L
RADIUS IS
GROUND
>
f
vSlfc?-"? >
I
-vV.-.v-Q
R * N D l
WHEEL
PROCESS
N(q
T
REbET AT
Z"
j_ ias
^TAUBRATINC
(Slop) P.LOCK-
( FIXED )
CHART
’
"B"
k
QRINDINQ
/ WHEEL
o
/(
b
ADVAtK E
TOOL UNTIE
RAOIU5 IS
CjROU'N D
FROM
TEMPLATE
I
Page 7
-I .♦
Templates
(continued)
The template material is of a plastic substance and is
very easy to grind in making shapes to suit a model tool*
Templates are easily marked for the tilt
and roll settings of the
universal tool holder as well as the tool number, so that set-ups
can be duplicated quickly each and every time that particular type
of tool is to be ground©
Table Tilting Mechanism
While most tools ground in this machine will not require
the table to be tilted, this mechanism is available at extra cost,
if desired© It will be found useful for tools such as parting
tools which require relief
table for this job gives the proper relief
on
each side, 180° apart. Tilting the-;
angles on both sides.
This mechanism provides a Vernier Scale at the front of the
machine which indicates the angle of table setting within
one
minute of arc©
Page 8
SPECIFICATIONS
TYPE
Motor Drive, with handwheel slide feed and arranged
for wet or dry grinding and includes all necessary
equipment as listed below.
CAPACITY
Convex Single Point Cutting Tools up to'2"
Square Shank
Relief Angles
to
and incl 15°
Up
Side Rake Angles (Positive or Negative)
Up to and incl 30°
Back Rake Angles (Positive or Negative)
Up to and incl 2.5°
Main Drive—1 h.p., 3450 r.p.m. motor with manual
Coolant Pump—% h.p., 1725 r.p.m.. integral drive
Control Cabinet
1—Universal Tool Holder
1—Template Grinding Step Block
1—Rake Grinding Fixture
3—Grinding Wheels (1 Alundum, 1 Crvstolon,
1—Diamond Setting Gage
1—Diamond Nib with Yi Carat Diamond (OPT I ONAL )
GRINDING WHEEL
" Dia. Plate Mounted Cup Wheel up to 2" Face
1
6—
12—Plastic Template Blanks, J/g" thick
1—Coolant tank, pump with integral motor, and
GRINDING WHEEL SPINDLE
Precision Bearing Cartridge Type
ELECTRICAL EQUIPMENT
starter and reversing switch
motor and controls
STANDARD EQUIPMENT
1 Diamond)
Tool Holder Inserts
all necessary piping
OPTIONAL EQUIPMENT
(OPT I ONAL )
SPINDLE OSCILLATION
3
Total Oscillation. .
Rate of Oscillation
inch
115 Complete Osc. per Min.
COOLANT SYSTEM
Gravity Feed Coolant System..Tank 25 gal. capacity
W
EIGHTS (Approximate)
........
........
2200 lbs.
2650 lbs.
are
Net, Pounds
.........................
Domestic Shipping, Pounds
Because of variations in equipment
in cubic feet.
The descriptions, illustrations and specifications in this booklet
is constantly to improve its machines, those built at later dates may differ from these details to some extent.
Motor weights are included.
and
castings, exact weights and
1—Master Tool Protractor Attachment
1—L'nivcrsal Angle Gage
1—Work Light
FLOOR SPACE
Floor Space—
Export Shipping, Pounds.
Cubics
cubics cannot be
correct
—boxed for export
at the
41" wide x 47" deep x 61" high
given,
time
The above
of printing.
Since the policy
weights are in pounds; cubics are
.2900 lbs.
102 cu. ft.
of
Norton Company
T
Page 9
PRODUCTS
>
f'
ABRASIVES • GRINDING WHEELS © REFRACTORIES © FLOOR AND
STAIR TILE © AGGREGATES © NORBIDE PRODUCTS © LABELING
MACHINES © ENCAPSULATING MACHINES
MACMES
CYLINDRICAL GRINDING © SURFACE GRINDING o CYLINDRICAL
AND FIAT LAPPING © UNIVERSAL TOOL AND CUTTER GRINDING
UNIVERSAL GRINDING o SPECIALIZED GRINDING o CRANKPIN
AND CRANKSHAFT BEARING GRINDING © CAM AND SMAP2
GRINDING © CAM SHAFT GRINDING o ROLL GRINDING
AUTOPART REGRINDING © ATTACHMENTS AND EQUIPMENT
FOR SPECIAL WORK
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Hsnr3“?©B*d 7
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a 998 Farmington Avenue; 6„ 61 Brcc-dway;
3, 1306 East 55th Street;
32, 4737 South Christiana Avenue.
offices
8, 5805 Lincoln Avenue;
I
t
DISTRIBUTORS IN ALL PRINCIPAL CITIES
THROUGHOUT THE WORLD
CABUE AmRESS: "mtiCQ
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orcester
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