Instruction Sheet
MODEL SB1269
TAPER ATTACHMENT
Introduction
designed to fit onto a series of South Bend
lathes. Shown in Figure 1, is a Model SB1012
lathe that is fitted with the Model SB1269 taper
attachment.
The Model SB1269 taper attachment was
This taper attachment is heavy! Get
assistance when installing this accessory on
the lathe. Wear heavy duty leather boots for
foot and toe protection, and keep hands and
fingers away from all pinch points. Ignoring
this warning can lead to a severe crushing
injury or finger amputation!
Specifications
•
Fits Lathe Models ..14" x 40" SB1012, SB1013
................................16" x 60" SB1014, SB1015
............................... 16" x 40" SB1037, SB1038
Taper Per Inch Range.............................0–18"
Minor Inch Scale Divisions....................0.010"
Major Inch Scale Divisions....................0.020"
Taper Angle Range .................................0–10°
Taper attachment installed
on rear side of lathe
•
•
•
•
•
•
•
•
•
•
•
Figure 1. Model SB1269 installed.
This taper attachment mounts quickly to the
back bed way of your lathe. Accurate tapers of up
to 12" can be produced without repositioning the
attachment or having to offset the talstock.
Minor Taper Scale Divisions .......................1⁄2
Major Taper Scale Divisions.........................1°
Maximum Length of Taper..................... 121⁄4
°
"
Taper Adjustment Knob ............................Yes
Construction.............................................Steel
Unit Weight............................................ 78 lbs
Origin................................................... Taiwan
The Model SB1269 features scales at both ends,
reading inches-per-foot and degrees. An angle
adjusting knob with fine threads achieves
exacting control when setting tapers.
Another feature is the ability to use the taper
attachment without disengaging the cross slide
nut. This design allows the taper attachment to
be functional at any time by simply tightening
the two deadman-clamp cap screws, which lock
the deadman-clamp to the rear lathe way.
If you need help with your new item, contact
us at: (360) 734-1540 • FAX: (360) 676-1075
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Model SB1269
P R E P A R A T I O N
Unpacking
Things You'll Need
This item was carefully packaged to prevent
damage during transport. If you discover any
damage, please immediately call Customer
Service at (360) 734-1540 for advice. You may
need to file a freight claim, so save the containers
and all packing materials for possible inspection
by the carrier or its agent.
This attachment is intended to be a permanent
installation. Installation will take approximately
1.2 hours and require the following items:
For Assembly
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
Cotton Rags
Mineral Spirits
Safety Glasses
Oil Can with any Basic Machine Oil
Assistant
Open End Wrench (17mm)
Hex Wrenches (3, 4, 5, 6, and 8mm)
Tapered Drill Bit (8mm)
Safety Glasses
Inventory
When you are completely satisfied with the
condition of your shipment, you should inventory
the contents.
Oil Can with Pressure Tip
Dila Indicator with Magnetic Base
Phillips Screwdriver, #2
Hammer
Inventory (Figure 3)
A. Cap Screws M10-1.5 x 40mm
Qty
(Taper Attachment Mounting) ......................4
B. Taper Attachment Assembly.........................1
C. Tapered Pins 8.7 x 7.7 x 47mm.....................2
D. Copper Anti-Score Plug .................................1
E. Deadman Clamp Assembly ...........................1
F. Deadman Arm and Clevis .............................1
Drill Bit, 19⁄64"
Spiral Pin Reamer, Industrial Size: 6
—Small End Diameter: 0.2773"
—Large End Diameter: 0.3540"
A
B
C
E
D
F
Figure 3. Model SB1269 inventory.
-3-
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P R E P A R A T I O N
Cleaning & Protecting
The unpainted surfaces are coated with a heavy-
duty rust preventative that prevents corrosion
during shipment and storage.
Many cleaning solvents are
toxic if inhaled. Minimize
your risk by only using
these products in a well
ventilated area.
This rust preventative has been a close ally
and guardian since this item left the factory.
If the unpainted surfaces are free of rust, then
be thankful that the rust preventative did its
job...and try to stay thankful as you clean it off,
because it can be challenging to remove if you are
unprepared and impatient.
Avoid chlorine-based solvents, such as
acetone or brake parts cleaner that may
damage painted surfaces. Always follow the
manufacturer’s instructions when using any
type of cleaning product.
Plan on spending time cleaning and removing
the rust preventative. The time you spend doing
this will reward you with smooth sliding parts
and a better appreciation for the proper care of
the unpainted surfaces.
Basic steps for removing rust preventative:
1. Put on safety glasses and disposable gloves.
Although there are many ways to successfully
remove the rust preventative, these instructions
walk you through what works well for us.
2. Coat all surfaces that have rust preventative
with a liberal amount of your cleaner or
degreaser and let them soak for few minutes.
Before cleaning, gather the following:
3. Wipe off the surfaces. If your cleaner or
degreaser is effective, the rust preventative
will wipe off easily.
•
•
•
Disposable Rags
Cleaner/degreaser
Safety glasses & disposable gloves
Note: To clean off thick coats of rust preventative
on flat surfaces, such as beds or tables, use
a PLASTIC paint scraper to scrape off the
majority of the coating before wiping it off
with your rag. (Do not use a metal scraper or
it may cause scratches.)
Note: Automotive degreasers, mineral spirits
or WD•40 can be used to remove rust
preventative. Before using these products,
though, test them on an unnoticeable area
of a painted area to make sure they will not
damage it.
4. Repeat Steps 2–3 as necessary until clean,
then coat all unpainted surfaces with a
quality metal protectant to prevent rust.
Gasoline and petroleum
products have low flash
points and can explode
or cause fire if used for
cleaning. Avoid using these
products to remove rest
preventative.
-4-
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Note: Make sure to keep the correct race with
P R E P A R A T I O N
Installation
its original bearing, and do not hammer on
the casting or chisel the inner races out. The
inner race has a loose fit. If it is difficult to
remove from its seat, be patient and spray
some penetrating oil into the bore and
carefully work the race out from the grease
suction that is holding it. You can also soak
the casting in mineral spirits to break this
suction.
To install the taper attachment:
1. DISCONNECT LATHE FROM POWER!
2. With the assistance of a helper and using
a 6mm hex wrench, remove the four cap
screws holding the splash guard on the rear
of the lathe.
7. Using a #2 Phillips screwdriver, remove
the eight flat head screws and the taper
attachment top plate (Figure 6).
3. Using a 5mm hex wrench, remove the two
leadscrew end-cap cap screws shown in
Figure 4.
Set
Screws
Cap
Screws
Lock
Nut
Set
Screws
Leadscrew
End-Cap
Figure 6. Top plate removal.
Figure 4. Lead screw end-cap.
8. Using a 5mm hex wrench, loosen the slide
block set screw, as shown in Figure 7.
4. Using a 3mm hex wrench, remove the four
set screws (Figure 4) from the saddle.
5. Using a 17mm wrench, remove the lock nut
(Figure 4) from the end of the lead screw.
6. Slide the end-cap off the lead screw. Make
sure that the inner and outer race shown in
Figure 4 do not stick to the end-cap.
End
Cap
Outer
Race
Figure 7. Slide block removal.
Inner
Race
Figure 5. End-cap removal.
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P R E P A R A T I O N
9. Lift out the slide block without losing the
12. Clean the bearings and races with mineral
spirits, then dry and repack them with white
lithium grease.
copper anti-score plug (Figure 8).
13. Install the bearings and races onto the
leadscrew in the order shown in Figure 10.
Bearing and
Bearing
Race Orientation
is the Same as
Shown to the Left
Copper
Anti-Score
Plug
Races
Figure 8. Slide block copper anti-score plug.
10. Apply a dab of multi-purpose grease to the
copper plug to prevent it from falling out
when handling the slide block.
Figure 10. Slide block end-cap installation,
(bearings shown without grease for clarity).
14. Using a 17mm wrench, thread the lock nut
onto the lead screw until the bearings are
slightly preloaded, and the slide-block end
cap has zero end play.
Note: This copper plug prevents the set screw
from scoring the main pivot pin when the
taper attachment is being used.
11. Using a 5mm hex wrench, remove the two
cap screws that retain the slide block, and
remove the slide block end-cap as shown in
Figure 9.
15. Using a 5mm hex wrench, secure the
slide block onto the endcap with the two
previously removed cap screws, as shown in
Figure 11.
Slide
Block
End
Cap
1
4
⁄
2
"
End Cap
Slide Block
Figure 9. Slide block end-cap removal.
Figure 11. Slide block installation.
16. Pull or push the cross slide assembly so the
center of the pivot pin bore is 41⁄2" from the
carriage face, as shown in Figure 11.
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P R E P A R A T I O N
17. Make sure the copper plug is still inside of
21. Apply drops of oil liberally at all four way oil
ports, both slide block ways, and the pivot
pin shown in Figure 14.
the slide block.
18. With the help of an assistant, raise the taper
attachment underneath the slide block, so
the pivot pin slides into the pin bore in the
slide block (see Figure 12).
Ball
Oilers
Slide Block Ways
Ball
Oilers
19. With your assistant aligning the taper
attachment mounting holes, use an 8mm
hex wrench to tighten the four mounting cap
screws and secure the taper attachment to
the carriage face (see Figure 12).
Pivot Pin
Pin and Pin
Bore
Figure 14. Lubrication locations.
22. Reinstall the top plate as shown in Figure
Mounting
Cap Screw
15.
Figure 12. Taper attachment installation.
20. Using a 4mm hex wrench, snug the slide
block set screw so the copper plug is slightly
preloaded against the pivot pin (see Figure
13).
Figure 15. Top plate installation.
23. Slide the deadman clamp onto the lathe
way, thread the arm clevis into the taper
attachment, and then slide the arm clamp
onto the deadman arm, as shown in Figure
16. Do not tighten the mounting cap screws
or arm clevis at this time.
Pivot Pin
Figure 13. Pin adjustment.
-7-
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P R E P A R A T I O N
Deadman
Clamp Cap
Screw
Complete Travel Without
Deadman Clamp Contact
Arm
Clevis
Deadman
Arm
Arm Clamp
Cap Screw
1" Saddle
Safety Gap
Figure 18. Saddle gap.
Figure 16. Deadman and arm installation.
28. Using a 3mm hex wrench, loosen the four
locking set screws (Figure 19) that lock the
adjustment cam in position.
24. Using a 6mm hex wrench, loosen the
dovetail lock cap screw at each end of the
taper attachment, as shown in Figure 17.
Dovetail Lock
Scale
Four Locking
Set Screws
Cap Screw
Taper Angle
Control Knob
Adjustment
Cam
Clevis
Jam Nut
Figure 19. Deadman arm alignment.
Figure 17. Taper angle adjustment.
29. Rotate, push in, or pull out the adjustment
cam to adjust the deadman arm so it is as
parallel as possible with the lathe bed in
both the vertical and horizontal plane.
25. Turn the taper angle control knob (Figure
17), so the taper attachment points to zero
degrees as shown on the scale.
26. Re-tighten both dovetail lock cap screws.
Note: You may have to rotate the deadman arm
so the arm clevis allows the arm to be tilted
in a particular direction.
27. Slide the deadman clamp along the lathe
way to a position where the saddle will not
contact the clamp when cutting tapers.
There should be approximately 1" of safety
clearance or "saddle safety gap," as shown
in Figure 18. You must double check this
clearance to prevent a deadman clamp
carriage crash.
— To tilt the arm in the vertical plane, rotate
the knurled adjustment cam.
— To tilt the arm in the horizontal plane, slide
the adjustment cam in or out of the deadman
housings.
-8-
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35. Loosen the four mounting cap screws and
P R E P A R A T I O N
30. Using a 3mm hex wrench, tighten the
cam set screws and the clevis jam nut (see
Figure 16) when finished.
rotate the taper attachment left or right to
correct the alignment (see Figure 21).
31. Using 8mm and 6mm hex wrenches, tighten
the deadman clamp and the arm clamp cap
screws, as shown in Figure 18.
32. Move the carriage so the taper attachment
stops completely at the forward-most
position, as shown Figure 20.
Rotate Slightly
to Align
Figure 21. Parallelism correction.
36. Retighten the taper attachment cap screws,
and double check your parallelism.
37. Using the existing pilot holes in the taper
attachment housing as guides (see Figure
22), drill out both holes with a 19⁄64" drill bit,
and ream both holes with an industrial size
#6 spiral pin reamer deep enough so the
tapered pins fit flush. If you need to remove
the tapered pins for any reason, the internal
pin threads are a metric M6-1.
Figure 20. Taper attachment alignment.
33. Setup a knob indicator as shown in Figure
20, so the knob indicator point is against the
top of the dovetailed table.
34. Move the carriage to the other end of the
way, read the knob indicator, and note the
amount of total misalignment in parallelism
between the path of the carriage and the
path of the taper attachment.
Pre-Drilled 6.5mm
Pilot Holes for
Tapered Pins
— If the knob indicator readings show a tilt
of 0.025" or less between the two extreme
positions of the taper attachment, then the
alignment is acceptable. Go to go to Step 37.
— If the parallelism is greater than 0.025",
Figure 22. Roll pin installation.
proceed to Step 35.
38. Position and tap-in the tapered pins, so they
will permanently lock the taper attachment
in the current alignment position.
39. Reinstall the lathe splash guard.
-9-
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O P E R A T I O N
4. Using a 6mm hex wrench, loosen the dovetail
lock cap screw at each end of the taper
attachment, as shown in Figure 24.
Operation
When the deadman clamp cap screws are loose,
the deadman clamp slides along the lathe way,
and the taper attachment is disengaged. Normal
lathe turning operations can be conducted.
Dovetail
Lock Cap
Screw
When the deadman clamp cap screws are
tightened, the deadman clamp is locked to the
lathe way, and the taper attachment is engaged.
At this point tapered turning operations can be
made.
To use the taper attachment:
Taper Angle Control Knob
1. DISCONNECT LATHE FROM POWER!
Figure 24. Taper angle control knob.
2. Move the carriage, cross slide, and
compound rest so your turning bit is at your
needed location to begin the tapered cut.
5. Turn the taper angle control knob (see
Figure 24) until you reach the taper angle
or the taper-per-inch setting that you need.
Refer to Figure 25 to select which scale best
suits your needs.
3. Using an 8mm hex wrench, tighten both
deadman cap screws so the deadman clamps
against the lathe bedway, as shown in
Figure 23.
Cap Screw
Taper Angle
Taper Per/Inch
0
Figure 23. Deadman clamp location.
1
One inch long tapered
workpiece such as an arbor or pin.
Figure 25. Scale relationship with workpiece.
6. Retighten both dovetail lock cap screws.
7. Begin lathe operations.
-10-
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3. Using a 6mm hex wrench, loosen both
M A I N T E N A N C E
To disable the taper attachment:
dovetail lock cap screws (one end shown in
Figure 27).
1. DISCONNECT LATHE FROM POWER!
2. Use an 8mm hex wrench, and loosen both
deadman clamp cap screws shown in Figure
26, so the deadman can slide on the way as
the carriage is moved.
Dovetail
Lock Cap
Screw
Cap Screw
Taper Angle Control Knob
Figure 27. Taper angle control knob.
4. Turn the taper angle control knob until you
reach "0" as indicated by the taper scale.
5. Using a 6mm hex wrench, tighten both
dovetail lock cap screws.
Figure 26. Deadman clamp location.
-11-
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M A I N T E N A N C E
Slide Block Ways
Slide Block Ways
Maintenance Schedule
!
Always disconnect
machine from power before
performing maintenance or
serious personal injury may
result.
Pivot Pin
For optimum performance from your taper
attachment, follow this maintenance schedule
and refer to any specific instructions given in this
section.
Figure 29. Lubrication locations.
Daily:
3. Using an oil can with the same oil you use
on your lathe ball oilers, apply oil on the
knob threads shown in Figure 30.
•
•
•
Check/correct loose mounting bolts.
Clean/protect table.
Clean metal chips and coolant residue from
all surfaces.
•
•
Lubricate ball oilers.
Correct any other unsafe condition.
Knob Threads
Monthly:
•
Lubricate pivot pin and slide block ways.
To lubricate the taper attachment:
1. DISCONNECT LATHE FROM POWER!
2. Using an oil can with the same oil you use on
your lathe ball oilers, apply liberal amounts
of oil to the four ball oilers, the pivot pin,
and the dovetail surface shown in Figures
28–30.
Figure 30. Lubrication locations.
To clean the taper attachment:
1. DISCONNECT LATHE FROM POWER!
Ball Oilers
2. Vacuum excess metal chips and wipe off the
remaining metal, coolant, and oils with a
dry cloth.
If any coolant sludge has built up, use
mineral spirits to remove, and then
relubricate with the same oil you use on
your lathe to prevent surface rust.
Figure 28. Lubrication locations.
-12-
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P A R T S
Taper Attachment Breakdown
7
3
8
2
9
10
11
2
12
5
13
12
14
15
16
12
17
18
13
28
30
20
19
31
21
32
36
33
23
20
22
34
35
49
24
25
26
23
46
36
50
51
37
41
10
46
27
11
45
48
33
38
39
40
42
40
43
47
44
-13-
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P A R T S
Parts List
REF PART #
DESCRIPTION
CAP SCREW M6-1 X 20
REF PART #
DESCRIPTION
2
PCAP02M
28
30
31
PSB1269028 PIN
PSB1269030 PIVOT SADDLE
PSB1269031 GIB
3
5
PSB1269003 BALL OILER
PSB1269005 END CAP
7
8
9
10
11
PFH04M
PSB1269008 COVER PLATE
PSB1269009 SLIDE BLOCK
PSB1269010
PSS06M
PCAP45M
PSB1269013
PSB1269014
PSB1269015
PS68M
FLAT HD SCR M6-1 X 8
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
PSB1269032 GIB SCREW
PCAP31M
CAP SCREW M8-1.25 X 25
PSB1269034 DOVETAIL
COPPER PIN
PCAP06M
PCAP14M
CAP SCREW M6-1 X 25
CAP SCREW M8-1.25 X 20
SET SCREW M8-1.25 X 16
CAP SCREW M8-1.25 X 45
TAPERED PIN
MAIN HOUSING
PLATE
PHLP HD SCR M6-1 X 10
SET SCREW M8-1.25 X 25
HEX NUT M8-1.25
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
PSB1269037 COTTER PIN 4.5 X 30MM
PSB1269038 CLEVIS
PSB1269039 CLEVIS PIN
PSB1269040 NUT BLOCK M6-1 X 25
PSB1269041 T-NUT M8-1.25
PSB1269042 NUT BLOCK
PSB1269043 LEADSCREW
PSB1269044 KNOB
PSS21M
PN03M
PCAP13M
PSB1269020 STAINLESS RIVET
PSB1269021
PSB1269022
PSB1269023 STOP
PSB1269024
PSB1269025
PSB1269026 GIB
PCAP07M CAP SCREW M6-1 X 30
CAP SCREW M8-1.25 X 30
PSB1269045 DEADMAN ARM
SCALE TAPER-PER-INCH
SCALE DEGREE
PSS04M
SET SCREW M6-1 X 12
PSB1269047 ARM CLAMP
PSB1269048 ECCENTRIC CAM
TABLE
T-NUT M8-1.25
PCAP143M
CAP SCREW M10- 1.5 X 50
PSB1269050 DEADMAN CLAMP
PSB1269051 PLATE
-14-
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W A R R A N T Y
WARRANTY & RETURNS
This quality product is warranted by South Bend Lathe Company to the original buyer for one year
from the date of purchase. This warranty does not apply to consumable parts, or defects due to any
kind of misuse, abuse, negligence, accidents, repairs, alterations or lack of maintenance. We do not
reimburse for third party repairs. In no event shall we be liable for death, injuries to persons or
property, or for incidental, contingent, special or consequential damages arising from the use of our
products.
We do not warrant or represent that this machine complies with the provisions of any law, act, code,
regulation, or standard of any domestic or foreign government, industry, or authority. In no event
shall South Bend’s liability under this warranty exceed the original purchase price paid for this
machine. Any legal actions brought against South Bend Lathe Company shall be tried in the State of
Washington, County of Whatcom.
This is the sole written warranty for this machine. Any and all warranties that may be implied by
law, including any merchantability or fitness, for any purpose, are hereby limited to the duration of
this warranty. To take advantage of this warranty, contact us by mail or phone to give us the details
of the problem you are having.
Thank you for your business and continued support.
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Copyright © February, 2010 By South Bend Lathe Co. Revised April, 2010 (CR).
WARNING: No portion of this manual may be reproduced in any shape or form
without the written approval of South Bend Lathe Co.
#CR12550 Printed in Taiwan.
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