UNIVERSAL CUTTER /GRINDER
OWNER’S MANUAL
WARNING: Read carefully and understand all
INSTRUCTIONS before operating. Failure to follow the safety
rules and other basic safety precautions may result in serious
personal injury.
Item# 426245
CONTENTS
·Nomenclature of Controls------------------------------------------------------------------------------------------------------------------------------0
·Grinding Spindle-------------------------------------------------------------------------------------------------------------------------------------------0
·Servicing the index head bracket--------------------------------------------------------------------------------------------------------------------1
·Dressing the Grinding Wheel--------------------------------------------------------------------------------------------------------------------------1
·Cutter Profiles-Tool Angle-Cutting Speeds-------------------------------------------------------------------------------------------------------1
·Cutting Speeds---------------------------------------------------------------------------------------------------------------------------------------------2
·Tool angles recommended cutting speeds for single-lip cutters-------------------------------------------------------------------------3
Centering the Cutter Lip by Grinding---------------------------------------------------------------------------------------------------------------3
Circular Grinding of Cutters-Grinding the Back Angle of Side Cutting Edges--------------------------------------------------------3
Circular Grinding of Cutters-Grinding the Back Angle of End Cutting Edges---------------------------------------------------------4
Grinding Pointed Cutters--------------------------------------------------------------------------------------------------------------------------------5
Grinding the Back Rake Angle-------------------------------------------------------------------------------------------------------------------------5
Grinding Tapered Cutters- Circular grinding of side and End Cutting Edges---------------------------------------------------------6
Circular Tapered Cutters-Grinding the Back Angle of Side and End Cutting Edges------------------------------------------------7
Grinding Tapered Cutters-Grinding the Back Rake Angle of Side and End Cutting Edges (Round) --------------------------7
ACCESSORIES----------------------------------------------------------------------------------------------------------------------------------------------8
Twist Drill Grinding Attachment-----------------------------------------------------------------------------------------------------------------------8
INSTRUCTION FOR GRINDING END MILL---------------------------------------------------------------------------------------------------------9
INSTRUCTION FOR GRINDING A LATHE TOOL BIT--------------------------------------------------------------------------------------------10
Turning Seat Attachment---------------------------------------------------------------------------------------------------------------------------------12
Twist Drilling Attachment---------------------------------------------------------------------------------------------------------------------------------12
Leather Tools Attachment--------------------------------------------------------------------------------------------------------------------------------13
End Mills Attachment--------------------------------------------------------------------------------------------------------------------------------------13
Nomenclature of Controls
D Wheel dressing attachment S3 Index head slide
A Spring collect clamping quill O white dot window
T1 Cross slide clamping lever S5 Index head slide fine adjustment set screw
S2 Vertical swivel mount setting scale S4 Index head slide fine adjustment screw
T2 Vertical swivel mount clamping lever Q Cross slide
T3 Horizontal swivel mount clamping lever T6 Index drum F clamping lever
T4 Tubular guide clamping lever B1 Collect sleeve
F Horizontal swivel mount index drum U2 Screw
T7 Clamping lever for adjustment along tubular guide A1 Stop plate for 90 degree
H Index head bracket fine adjustment screw U3 Screw for A1
G Adjustable stop screw N4 Index drum
T5 Index head slide clamping lever N5 Ring nut
C Cutter lip aligning gauge E Index ring bearing sleeve
C1 Cross slide venires scale for off-center radii M3 Nut for index sleeve
P Spring collect index pin R7 Slotted disc
A3 Adjusting eccentric pin M4 Nut
GRINDING SPINDLE
The spindle bearing has been factory-adjusted to exclude pl ay while allowing for a free-running spindle. In the event
some play develops in the course of time, such play should be taken up by tightening the two nuts M. for this purpose, pull spindle
form its seat after having loosened screw S and removed the parts as indicated in the illustration on page 15 and relighting R. When
tightening the nuts allow fore a forerunning spindle. Excessive tightening would result in bearing failure. After reinserting the
spindle assembly carefully tightens screw Sin the bore, to hold the spindle assembly in position.
Servicing the Index Head Bracket
General
After a major period of use it will be necessary to dismantle the index head bracket and to clean and lubricate the collect
sleeve bearing, the index head slide, and the swivel arm.
Collets Sleeve Bearing
To remove the collect sleeve proceed as follows; Remove ring nut N5, index drum N4, and i ndex ring R7, in that order.
Remove two nuts M3 pull or out index bearing sleeve E. The annu lar grease chamber in the longitudinal sl ide L, which has thus
been made accessible, should then be cleaned with petrol and refilled with tease.
Slide
Release clamping screw T5 and remove screw S5.Pull our index head slide S. Clean all working surfaces, smear lightly with
oil, cross slide Q can not be removed. Release clamping screw t1 and turn screw S4 to move the cross slide to its extreme positions.
Clean the bearing surfaces smear lightly with oil.
Swivel Arm
To remove the swivel arm and the index head as a unit remove the two nuts M4.Clean the bearing surfaces and smear them
with oil.
Adjusting the Clamping Mechanism of Index Drum F.
After a major period of use clamping lever T6 should no longer lock swivel index drum F, screw U2 will have to be adjusted.
For this purpose proceed as follows: Remove swivel arm as described above; remove screw U3 and stop plate A1; back off nut M2
and screw U1 and pull out clamping lever T6. Lift off index drum F to pull out adjusting nut and screw U2 rotate screw 180
to nut to reduce the length-to reassemble parts reverse procedure.
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relative
Adjusting the stop pin for the 90o swivel motion
If, due to constant striking of stop plate A1 against stop pin A2 and A3, the swivel range should no longer be
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exactly 90
cylindrical setting of the collect sleeve bearing, while turning stop pin A3 will adjust the 90
correct the adjustment by turning the two eccentric stop pin A2 and A3. Turning stop pin A2 will change the
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swivel motion.
Dressing the Grinding Wheel
Wheel Turing and dressing should be performed at regular intervals. Dressing is done by means of a diamond set in a tip
which is held in a rod. The latter is attached to an arm which is provided with a feed screw . The diamond tool assembly s supported by
the wheel guard (see Fig. 1 and 2) wheel Turing and dressing is particularity necessary when the wheel has become headed or when
sharp corner has been worn off. Failure to comply with rule will result in poor surface finish and overheating of the cutting tools.
Messing:
1. Loosen clamping nut D. Shift dressing diamond to the right. Swing the dressing attachment in front of the wheel rim.
2. Set diamond, dresser 1 mm in front of the wheel. Lock clamping nut D.
3. Turn feed screw until the dressing diamond contacts the wheel. The layer to be dressed is 0.2mm.Give feed screw 1/5th turn.
Cutter Profiles-Tool Angle-Cutting Speeds
Cutter Profiles
As rule, single-lip milling cutters are given one of the seven basic profiles illustrated below:
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Above are illustrated the seven basic cutter profiles and cross sectional views of the profiles they will produce
Material to be cut
Tool Angle Recommended cutting speeds for high speed steel single lip
cutter roughing cut finish cut
α β γ S.f.p.m m/min s.f.p.m m/min
Cast steel
Malleable cast iron
Machinery steel
57,000 to 85,000
(40to60kg/mm)
85,000 to115,000
(80kg/mm)
Over 115,000
25° 15° 5° 195 60 260 80
230 70 295 90
195 60 230 70
130 40 165 50
(80kg/mm)
Tool steel soft
grade hard grade
Brass, 58/41 soft
Grade hard grade
Brass,63/37soft
grade Hard grade
Bronze soft grade
Hard grade
Aluminum soft
Grade hard grade
30° 15° 5°
35°
195 60 260 80
165 50 230 70
655 200 820 250
820 250 1150 350
395 120 490 150
490 150 590 180
525 260 655 220
655 200 755 230
655 200 985 300
820 250 1150 350
985 300 1150 350
25° 15° 5°
Plastic: Trogon
Pertinaz,Fiber
35° 820 250 985 300
45° 25° 20° 688 200 820 250
Astral on, Celluloid
Plexus
Wood
655 200 985 300
655 200 1150 350
Cutter with end relief. Cutter with pointed end. Rounded-off cutter
Tool Angles
As is the case with all metal cutting tools, single-lip milling cutters require the proper amount of cutting edge relief or back rake
angle for maximum stock removal and high surface finish. As r egards single-lip cutters, three different tools angles will have to be
taken care of, these angles being used in all kinds of cutters.
Angle β applies to end relieved cutters onl y. Cutters having an angle of less than 20
30o.
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should be relief ground at between 25o and
Cutter Speeds
As regards single-lip milling cutters, it is recommended to use cutting speeds three times higher than those used with standard
type milling cutters. The data tabulated on the below should be used as a guide only. As such factors as drive conditions and available
spindle speeds will also have to be taken into consideration. In end cutting edges the cutting speed will decrease forwards the cutter.
Center line. This effect is particularly noticeable in rode-off cutter . As a consequence, care should surfaces are concerned, rather than
downward.
When cutting soft aluminium, use kerosene as a coolant. When cutting celluloid, the cutter must always be in feed motion, in order to
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avoid inflammation.
Tool angles recommended cutting speeds for single-lip cutters
Centering the Cutter Lip by Grinding
Cylindrical single-lip milling cutters are supplied by the manufacturer with the lip preformed by rough milling (see Fig. 1). As a result,
the cutter lip will first have to be accurately centered by grinding. Rough grinding of the lip is performed manually by holding the cutter
giants the circumference of the grinding wheel (see Fig.2). This operation is followed b y finish grinding in the machine. The off center
tolerance is ± .0004”(0.01mm), which should be checked with a micrometer caliper (see Fig.3). To grind the cutter lip correctly,
proceed as follows:
Setup Operations
1. Set swivel arm and index drum F at zero, tighten clamping lever T3: set vertical setting scale S2 at zero, tighten clamping lever
T2 (see Fing.4).
2. Set cutter with aligning gauge C clamp cutter in position, rectum aligning gauge C (see Fig.6).
3. Withdraw index pin Prostate spring collect bearing 180
4. Shift index head bracket along tubular guide to bring cutter lip into light contact with end face of grinding wheel. Be sure prior to
tightening clamping lever T7, to align vertical sisal s wivel mount index mark with tubular guide. Tighten clamping lever T7,
release clamping lever T4.
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, allow index pin P to engage the short-slot.
Centering the Cutter Lip
6. Fine adjustment screw H serves to set the index h ead accurately relative to the wheel and to provide the desired depth of c ut.
The travel of the cutter past the wheel can be limited by means of adju stable stop screw G. T hus it is possible, during priding to
advance the cutter as far as it will go. To bring the cutter lip within the prescribed off-center tolerance, reciprocate the index head
bracket while advancing the cutter by rotation fine adjustment screw H.
In order to prevent the cutter from being overheated, it is recommended to leave only a narrow cutting zone on the grinding wheel
(see page 5 “Dressing the Grinding Wheel”). The length of the cutter lip should equal one and one half times the diameter of the
cutter.
It is not advisable to Increase the length of the cutter lip beyond a certain limit. In the case of deep engraving work where stepped
cutter is sued the shank of the cutter will be increased instead of the lip.
Circular Grinding of Cutters-
Grinding the Back Angle of Side Cutting Edges
After centering the lip it will be necessary to grind the back rake angles of both the side cutting edge and the end cutting edge. The
back rake angles of both cutting edges should be selected to suit the material to be cut.
Setup Operations
1. Rotate swivel arm to set index F at zero; tighten clamping lever T3.
2. Bring white dot into window Unengaged index pin P into long slot.
3. Align cutter by means of gauge C; grip cutter in position return gauge C (see Fig.2).
4. Release clamping lever T2;set s wivel arm at desired back rake angle using setting scale S2;tighten clampi ng lever T2 (see
Fig.3).
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5. Tighten clamping lever T4;release clamping lever T7;shift work fixture on tubular guide to bring cutter into light contact with
grinding wheel, tighten clamping lever T7;release clamping lever T4.
Circular Grinding
6. Draw index pin P out of the slot; grind desired diameter by rotating spring collets bearing through 360o. During this operation
slowly rotate adjustable stop screw G, while continuously rotating the spring collets bearing, to advance the work fixture past
the grinding wheel; this will produce uniform stock removal. Fine a djustme nt during circ ul ar grin ding is b y screw H. Stop screw
G is used to establish the length of the cylindrical portion which should always be slightly longer than the cutting lip.
7. Return whit dot into window Unengaged index pin P into short slot to enable bearin g to be rotate 180
stops.
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between the index plate
Grinding the Back Rake Angle
8. When grinding the back rake angle, use the fine adjustment scre w H over the entire range of rotation of the collets bering (see
Fig.3a). Grinding of the back rake angle is positive control led. The angle is required to extend over t he entire lengthy of the
cutting lip.
The vertical swivel bearing, which permits the work holding fixture to be swung back, enables re lief angles up to 40
Relief angles over 40~can be obtained by additional ly rotating the collets bearing in the index head. (Only for cylindrical or tapered
cutter with straight end cutting edges or for pointed cutters.)Upon completion of grinding operations a ver y narrow land must remain
at the cutting edge (see Fig.4).
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to be produced.
Circular Grinding of Cutters-
Grinding the Back Angle of End Cutting Edges
The end cutting edge illustrated in Fig. 1 may be ground it an operation immediately following the grinding of the side cutting edge; or
it may be ground independently. In the latter case the cutter will have to be aligned by means of gauge Cad clamped in position.
Whenever a single-lip cutter is to be ground, the aligning will have to be used, as one leg of the cutting angle should be sele cted to
suit the material to be cut. (See page 5)
Setup Operations
1. Release clamping levers T2; using setting scale S2, set swivel arm at approx. 3o; tighten clamping lever T2.
2. At desired angle; for example set arm at 75
3. Tighten clamping lever T4; release lever T7; shift work fixture on tubular guide to bring cutter into light contact with grinding
wheel tighten clamping lever T7; release lever T4.
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for back angle of 15o (see Fig.2and Fig.3). Tighten clamping lever T3and T6.
Grinding the Back Rake Angle
4. Fine adjustment screw H serves to set the index head laterally reactive to the wheel and to set the work for the desired depth of
cut. It is also possible to produce the desired back rake by holding the cutter against the circumference of the grinding wheel as
is shown in Fig4.
Circular Grinding of Cutters –
Grinding the Back Angle of End Cutting Edges (Round)
Cutter profiles having either on-center or-off-center radii are derived from cylindrical single0lip cutters having a straight end cutting
edge by rounding off the corner as shown in Fig.1 (No.2 and 3 profiles).
For this reason it is necessary, during grinding the end rake angle, that the work fixture is set at the side rake angle by means of
setting scale S2. If the end cutting edge is ground immediately after grinding the Sid setting edge, it will not be necessary to re-set the
work fixture and to re-align the cutting lip by means of gauge C.
Setup Operations
1. a. No.2 profil e : Release clamping lever T1:rotat knurled knob S4 to set cross slide by means of venire scale C1 for desires
radius (to the right);tighten clamping lever T1,9see Fing.2)as the radiuses corner is required to be tangent to the cutter
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diameter, the amount of off-set
“a” is: a = D / 2 – r
Example: Given r=.06” (1.5mm); D=.30” (8mm)
A=.15” (4mm)-.06” (1.5mm) =.09” (2.5mm)
b. No.3 profile: The venire scale C1 of the cross slide must be set zero (see Fig. 3).
2. Rotate fine adjustment screw H to bring the side cutting edge of the cutter into light contact with the face of the grinding whe e l.
Caution: do not injure the land of the side cutting edge. Now screw H must no longer be rotated.
Grinding the Back Rake Angle
3. Swivel index head through 90o (see Fig.4). Depth of cut adjustment now is by index heaps slide S1. Fine adjustment is b y
micrometer screw S6 of the index head slide with adjustment screw S5 tightened. The end of the c uter is rounded by slowly
swiveling the index head back to its original position. While the cullet bearing is continuously rotated back and forth bet ween
the stops, the rotation being through 180
amount by rotating screw S in order to prevent overheating of the cutter by excessive stock removal. After each pass of the
grinding wheel the cutter is then fen toward the wheel by means of screw S.
In order to obtain a satisfactory cutting edge it is advisable, as a final operation, to swivel the index head through 90
given a No.3 profile are intended for the machining of hard steel which requires a small back rake angle, it is good practice t o flatten
the curvature of the cutter by a manual grinding operation as shown in Fig.7.
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(see Fig.5 and 6). Prior to grinding, be sure to with draw the index head a slight
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with the cutters
Grinding Pointed Cutters
Where pointed cutters are concerned, both the included angle of the po int and the aback rake angle are produced in one o peration
(see Fig. 1). The back rake angle should be selected to suit the material to be cut.(see page 5)
Setup Operations
1. Align cutter lip by means of gauge ’C; grip cutter in position; return gauge C.
2. Engage index pin P into short slot to enable collets bearing to be rotated 180o between stops.
3. Release clamping levers T3 and T6 hold index drum F aga inst stop and, beginning at zero position. Set swivel arm at one half
the desired point angle (see Fig.2).
Example: Given a point angle of 60
4. Release clamping lever T2; set work fixture for desired back rake angle by means of sitting scale S2, see Fig.3. Tighten
clamping lever T2.
5. Tighten clamping lever T4; release lever T7; shift work fixture on tubular guide to bring cutter into light contact with grinding
wheel tighten clamping leverT7; release lever T4.
6. During grinding slowly return stop screw G to advance the work fixture past the wheel; at the sane time continuously rotate the
collets bearing back and forth between the stops, the rotation being through 180
Fig.4a，b，c，)Uniform stock removal will protect the cutter from overheating. Whet the cutter point by means of an oil stone. It
is advisable to whet the point as far as engraving conditions permit. This operation will give the point a small end cutting edge
which will participate in removing stock (See Fig. 5) .However, where airline engraving work is concerned(depth of cut nor
exceeding.0004”(.01mm) the shape of the point should not be changed; only the cutting edge proper should be carefully
whetted.
However, care should be exercised not to remove noticeable amounts of stock from the cutting lip, as this would destroy the
centering of the lip; moreover, this would render a greater or lesser part of it useless. When grinding the cutting lip for the first
time, care has to betaken to grind with a positive tolerance.
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Set swivel arm by index drum F at 30o .Retighten clamping levers T3 and T6.
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This ensures uniform stock remov al (see
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Grinding Tapered Cutters-
Circular Grinding of side and End Cutting Edges
Tapered cutters can be ground to size in the machine without the use of any measuring instrument, except for the scales provided on
the machine. For circular grinding operations on profiled cutters follow this procedure:
Setup Operations
1. Align cutter lip by means of gauge ’C; grip cutter in position; return gauge C.
2. Draw index pin P out of slot hole to enable collets bearing to be rotated throug h 360
scale S2 and F at zero. Tighten clamping levers T4, T2, T3, T6 see Fig.
3. Release clamping lever T7;bring cutter diameter into light contact with grinding wheel; tighten clamping lever T7,taking care to
keep index mark of vertical swivel mount aligned with tubular guide; release clamping lever T4,see Fig.4.
4. A.N0.5 profile 9F ig. 1 and 2): Release clamping lever T1; rotate knurled knob S4 to shift cross slide to the right by one-half of
dialog the taper (‘Fig.1). For this purpose use cross slide venire scale T. Tighten clamping lever T1.
B.No.6 profile (Fig. and 2): Release clamping lever T1; rotate knurled knob S4 to shift cross slide to the right by the desires
amounts” (use cross slide venire scale T). Tighten clamping lever T1.
C.No.7 profile (Fig. 1 and 3): Set cross slide venire scale at zero.
5. A.No.5 and 7 profiles: Rotate fine adjustment screw H to bring cutter diameter into light contact with grinding wheel: again
rotate screw H to shift cutter to the left by amount x = D/2-a. To facilitate this setting operation, set scale drum of scre w H at
zero without disturbing the setting of the screw (see Fig.4).
b.No.6 profile :Rotate screw H to bring cutter diameter into light contact with grinding wheel; again rotate screw H to shift cutter
to left by the amount x=D/2-(a+r). To facilitate this setting operation, set scale drum of screw H at zero without disturbing the
setting of the screw (see Fig.4).
6. Release clamping lever T3; ratate swivel arm through 90
screw S to advance end face of cutter towards grinding wheel. Wheel tapered cutters ar e to be retargeted; the length of the
cutting edge at the end of the cutter should be made greater than the small diameter of the tapered portion.
7. Release clamping lever T6; hold index drum F against its stop and counting from the zero position , set swivel arm at the
desired taper angle; tighten clamping lever T3 and T6, sgg Fig.6.
8. A.No.5 profile: Slowly return stop screw Gad and continuou sly rate the collets bearing through 360
past the grinding wheel. Prior to the circular grinding operation r atite fine a djustme nt screw H to shift the cutter to the right; the
advance the cutter towards the wheel by small increment unit the desired size has been obtained (see Fig.6).
b.No.6 and 7 profiles: Release clamping lever T3; first slowly return stop screw G, then slowly swing the swivel arm while
continuously rotating the collets bearing through 360
operation ratite fine adjustment screw H to shift the cutter to the right; then advance the cutter towards the wheel by small
increments until the desired size has been obtained (see Fig.7 & 8).
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; release clamping lever T5; rotate index head slide micrometer
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to move the cutter past the wheel and thus to circular grinding
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Release clamping levers T2, T3, T6. Set
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to advance the cutter
Circular Tapered Cutters-
Grinding the Back Angle of Side and End Cutting Edges
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The back rake angles of the side and end cutting edges may be ground immediately after circular grinding the desired cutter profile; or
in cases where only the taper angle (not, however, the small diameter of the tapered portion) is of importance, grinding may be
performed in an independent operation. Where the small taper diameter must be held within close tolerances, onl y the end cutting
face will be ground; in this case the cutter will have to be by gauge C and clamped in position. The back rake angles of the side and
end cutting edges should be selected to suit the material to be cut. For toll angles refer to Fig. 1.
Grinding the Side Cutting Edge
Setup Operations
1. Engage index pin R into shoet-slot; bring whit e dot into window O.
2. Release clamping lever T2 using scale S2 set cutter at desired back rake angle; tighten clamping lever T2, see Fig.2.
3. Tighten clamping lever T4;release lever T7; T4;release lever T7;shift work fixture on tubular guide to bring cutter i nto light
contact with grinding wheel tighten clamping lever T7,taking care to keep index swivel mount aligned with tubular quite; release
clamping lever T4.
Grinding the Back Rake Angle
4. W hile continuously rotating the collets bearing through 180o (back and forth between the stops), advance the cutter towards
the grinding wheel by means of fine adjustment screw H. This will produce the desired back rake angle in a positively controlled
operation (see Fig.2). Upon completion of the grinding op erati ons on th e side cutting e dge, a very narrow la nd must remain at
the edge.
Grinding the End Cutting Edge
Setup Operations
1. Release clamping lever T2; using scale S2, set swivel arm at an angle of approx.3; tighten clamping l ever T2, see Fig.3.
2. Release clamping lever T# ND t6;Hold scale F against its stop and, beginning at the 90 –position, set swivel arm at the desired
angle; for example where an angle of 10 is desired, the swivel arm will have to be set at 80 . Tighten clamping levers T3 and t,
see Fig.4.
3. Tighten clamping lever T4;relese lever T7;shift work fixture along tubular guide to bring end face of cutter into light contact with
grinding wheel; tighten clamping lever T7,taking care to keep index mark of vertical swivel mount align ed with tubular guide;
release clamping lever T7.
Grinding the Back Rake Angle
4. Lateral fine adjustment of the work fixture relative to the grinding wheel and adjustment for depth of cut is obtained by means of
screw H. It is also possible to grind the back rake angle manually; care s hould however, be taken to produce the correct tool
angles (see Fig.5).
In cased where close tolerances on the small taper diameter after grinding edge will have to be main tained; this will make it
possible to check whether or mot the small taper diameter was changed during grinding operations (see Fig.6)
Grinding Tapered Cutters-
Grinding the Back Rake Angle of Side and End Cutting Edges (Round)
Tapered cutters having either an off-center of an on-center adios can be given a back rake ang le only in connection with her circular
grinding operation (see Fig.1). The back rake angle of the side cutting edge equals that of the straight or codec end cutting edge; the
proper angle to be used will be found in page 5. After tapered cutters with rounded end cutting edges have become dull, first proceed
with the circular girding operation described on page 12; then follow the procedure indicate below.
Setup Operations
1. Release clamping lever T2;use scale S2 to set work fixture at desired back rake angle; tighten clamping lever T2.Tighten
clamping lever T4;release lever T7;shift work fixture along tubular guide to bring cutter into light contact
2. with grinding wheel; tighten clamping lever T7,taking care to keep index mark of vertical swivel mount aligned with tubular
guide; release clamping lever T4.(see Fig.2)
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Grinding the Back Rake Angle
3. While continuously rotating the collets bearing through 180 (back and forth between the stops), advance the cutter towards the
grinding wheel by means of fine adjustment screw H. This will produce the desired back rake angle on both side a nd the end
cutting edges in a positively controlled operation (see Fig.3, 4, 5).
Upon completion of grinding operations, a very narrow land must remain at the cutting edge.
In cases where the cutter is intended for the machining of hard steel which requires a small back rake angle, it is
4. Advisable to grind off part of the curvature in a manual operation (see Fig.6).
In addition it is recommended, with regard to all single lip cutters, to whet also the cutting lip by means of an oil stone in order to
remove burrs. However, care should be exercised not to remove noticeable amount of stock from the cutting lip, as this would
destroy the centering of the lip; moreover, this would render a greater or lesser part of it useless.
ACCESSORIES
STANDARD EQUIPMENT
1.Wheel dresser with diamond 1
2.Diamond pen 1 15. Hock spanner(C8) 1
3.Wheel mount(Flange)(C1) 1 16.Wheellockpin(C5) 1
4.Driving belt (C3) 1 17.Springcollects(C7) 5
5.Wheel lock pin(C5) 1 18.Wheelspanner(C9) 1
6.Machine light 1
7.Hex socket screw wrench(C4) 4 SPECIAL ACCESSORIES (ON EMEND)
8.Aligning finger(C6) 1 1.Diamond wheel for grinding carbide cutter
9. Operating Instructions 1 2.Balance stand and arbor
10. Twist drill grinding attachment 1 3. Special index head slide with clamping sleeves for
11.End mill grinding attachment 1 4.R8collets:dia, 3,4,5,6,8,9,10,12,14,16,18,20,22,25and
12.Lathe tools grinding attachment 1 5. Driving belt.
13. High-speed cutter grinding wheel 1 6. High-speed cutter grinding wheel.
4”×2”×3/4”(C2)
14.Wheelmount(Flange)(C1) 1
1/8’,1/4”,5/16”,3/8”,1/2”
grinding dial,20,25mm cutter
1/8’,3/16”,1/4”,5/16”,3/8”,1/2”,5/8”,3/4”
Twist Drill Grinding Attachment
The twist drill grinding attachment has been designed for grinding t wist drills of 3 to 18 mm (1/8”to11/16”)diameter. The lip angle is
always 116, while the back rake angle is adjustable as required.
To mount the attachment (see Fig.2), attach a 12 mm (1/2”) spring collets to locating pin 1 and insert the collets into the index head
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slide
of the index head bracket, introducing retaining pin 2 into the bore of the off-side setting gauge. Adjustable stop 5 has a flat furnace on
one side for holding twist drills of 3 to 18mm (/18”to11/16”) diameter. The drill is held by hand against stop 5 and the swivel-mounted
V-guide 4 during grinding (Fig.1). After backing off clamping screw 7, stop 5 with ring 999 can be pulled off (depress catch 10) and
mounted in reveres position. This permits clamping of small drills (3 to 6mm or 1/8”to 1/r”dia.)By means of clampin g screw 6, since
experience has shown that such drills are difficult to hold by hand grinding.
Setup Operations
1. Release clamps K3 and K4. Hold index drum T4 against stop by means of the knob and set swivel arm at 13 .Retighten clamps
K3 and K4.
2. Release clamp K2 and set swivel arm at zero on setting scale T2 (resulting in a normally suitable rake angle). If larger or
smaller rake angles are required, adjust swivel arm accordingly. Retighten clamp K2.Release clamp K6 and screw D6. Move
index head slide T until its front face roughly coincides with the front face
3. of cross slide Q. Retighten clamp K6 and screw D6.Only if new grinding wheel is use d :
4. Release clamp K5,move cross slide Q fully to the right using knurled screw S5.Retighten clamp K5.Release clamp 3(on
attachment) and adjust swivel-mounted V-guide 4 until the scale shows the diameter of the twist
5. Drill to be ground. Retighten clamp 3.Release clamp K1,tighten clamp K. Move index head br acket on the tubular guide until
gauge plate 8 is position
6. approx. .04” (laterally of the face of the grin ning wheel. Align vertical swivel mount index mark with reference line of tu bular
guide, then retighten clamp K1 and release clamp K. Place theist drill on V-guide 4.Back off clamping screw 7 and advance
stop 5 until the cutting face of the drill rests
7. Against gauge plate 8, projecting approx. 0.02” (.5mm) Tighten clamping screw 7. When using the adjustable stop in reverse
position (for small twist drills of 3 to 6mm 1/8”to 1/4” dia.), tighten clamping screw 6.
Setup Operations
8. Swivel twist drill grinding attachment upwards. Use fine ad justment screw F to advance the drill until it contacts the grinding
wheel. Grinding first cutting edge by swiveling the attachment downwards (Fig.3). Repeat feed and grinding operation if
required.
9. Place twist drill into V-guide 4 in 180 inverted position and grind second cutting edge leaving the attachment and the adjustable
stop in the previously used position (i.e. not advancing fine adjustment screw F.)
INSTRUCTION FOR GRINDING END MILL
Change the original work head into End mill attachment work head. (As drawing l)
Insert the suitable size U2 collets into the tapered hole of the end mill attachment work head.
9
Insert the end mill into the U2 collets and faster it, So that the end mill will not turn. (as drawing ll)
Set the center of the wheel head at the height of the work head spindle center and locate the end mill top leaving about 5mm form
grinding wheel (as drawing lll)
Swiping the end mill attachment work head by the degree of relief angle.
Use the grinding guide pin to grinding the rake of end mill followin g the screw of end mill by the direction from front to back. (as
drawing IV)
To grinding the secondary relief angle when the primary re lief angle grinding is finished ake the grinding guide pin into the screw
groove of secondary rake then grinding same as first rake.
Swivel the end mill grinding attachment horizontally by 90 degree then according the degree of end cutting ed ge an gle of end mi ll for
grinding the rake of the top angle of end mill. (As drawing llv)
INSTRUCTION FOR GRINDING A LATHE TOOL BIT
10
Change the original work head into Lathe tool attachment work head. (As drawing l)
Insert the Lather tool bit into the Lathe tool attachment work head and fasten it, so that the Lathe tool bit will not move.
Set the center of Lathe grinding attachment at the height of the grinding wheel of the spindle center. (As drawing ll)
Swivel the lathe tool grinding attachment horizontally by the degree of side cutting edge angle for grinding side cutting edge angel
(A),Fix the angle the horizontal angle A then swivel the lathe tool grinding attachment vertically by the degree of side rake angle (B)
for grinding side rake angle (as drawing lll)
Swivel the lathe tool grinding attachment horizontally by the degree of and cutting edge angle for grinding end c utting edge angel
C),then fix angle for grinding end cutting edge angel ©
The horizontal angle at angle A then swivel the lathe tool grinding attachment vertically by the degree of side relief angle (D) &
secondary relief (D1) (as drawing IV)
Swivel the lathe tool grinding attachment horizontally by the degr ee at ori ginal positi on the n s wivel the lathe too l grind ing a ttachment
vertically by the degree of front relief (E) and second relief (E2)
Change the lathe tool bit by top-side face the grinding wheel, swivel the lathe tool grin ding attachment horizontally by the degree of
back angle negative back rake angle for grinding for grinding back rake (F) or negative b ack rake (F2)
Main Seat
Index
No.
1 Bolt 17 Belt Wheel A4026
2 Font-Back Adjust screw 18 Passing Spindle A4033
3 Degree Ring A4016 19 Flange Screw A4029
4 Turn Wheel A4012 20 Grinding Wheel
5 Wheel Dresser Handle 21 Flange Bracket
6 Wheel Dresser A4038 22 Flange Tighten Nut
7 Seat A4041 23 key
8 Fixed Tighten screw 24 Drive Belt
9 Fixed Tighten screw 25 Belt Wheel A4004
10 Grinding Wheel-Turning Wheel A4006 26 Motor
11 Wheel Degree Ring A4044 27 Right-Left Fixed Ring A4014
12 \adjust screw 28 Right-Left Connected Level A4023
13 Copper plate 29 Handle
14 Spindle End Sleeve A4045 Foot Cushion
15 Passing Spindle Sleeve Cover Board A4042
16 Spindle Sleeve A4017 Plate A4037
Right-Left Degree Ring A4011
Parts Name Parts No. Index
Parts Name Parts No.
No
11
Turning Seat Attachment
Index No. Parts Name Parts
NO.
1 Leader Level 14 Tighten Screw A4009
2 Fixed Screw 15 Front-Back Degree Ring A027
3
4 Adjust Fixed Handle A4012 17 Reading Fixed Plate
5 Handle A4035 18 Collect Seat A3005
6 Screw A4041 19 Oil Ball
7 Right-Left Fixed Screw 20 Collect A4001
8 Key 21 Key
9 Right-Left Micro Adjust Level 22 Seat A3003
10 Gear A4005 23 Handle
11 Plate A4038 24 Turning Seat A3006
12 Dearer Bolt A4030 25 Sleeve Tighten Nut A4046
13 3-Speed Fixed Handle
Front-Back Micro Adjust Screw
A4016 16 Spring
Index
NO.
Parts Name Parts NO.
Twist Drilling Attachment
NO Parts Name Parts NO Remarks NO Parts Name Parts NO Remarks
1 Bolt 8 Bolt
2 Slip Block A4036
3 Gradient Plate 10 Eccentric Ring A4018
4 Bolt
5 Twist Drill Spindle A4031 12 Bolt
6 Slip Block 13 Collect Spindle
7 Bolt 14
M6×12
M4×8
9 Handle
11 Turn Plate
12
M6×12
M3×15
M1×12
Leather Tools Attachment
Index NO Parts Name Parts No Remarks Index NO Parts Name Parts No Remarks
1 Loath Seat A3001 6 Bolt
2 Fixed Board A4020 7 Fixed Board A4021
3 Bolt 8 Bolt
4 Bolt
5
Bolt A4031
M6×12
M6×20
9 Bolt
M6×20
M4×12
M4×8
M4×8
End Mills Attachment
Index
NO
1 Collect seat Tighten Screw A4019 9 Bolt
2 Collect Seat 10 Adjust Level A4032
3 Tighten Ring A4013 11 Adjust Level
4 Oil Cup 12 Bolt
5 Connect Block 13 Sleeve
6 Connect Block 14 Slip Block A4003
7 Bolt
8 Bolt
Parts Name Parts NO Remarks Index
NO
M6×16
M6×16
15 Tighten Nut
Parts Name Parts No Remarks
M5×12
M×25
R8 COLLET
13
Northern Tool + Equipment Co.,
2800 Southcross Drive West
P.O. Box 1499 Burnsville, MN 55337-0499
Made in China
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