Swagelok MS-TBE-2 series, MS-BTB-M series, MS-TBE-1 series, MS-BTB-2 series, MS-BTB-1 series User Manual
Bench Top Tube Bender
User’s Manual
■
Electric and manual units
■
Bends fractional and metric tubing
■
CE compliant
2 Bench Top Bender User’s Manual
Contents
Safety Instructions ........................... 2
Technical Data .............................. 2
Tubing Data ................................. 3
Bend Layout ................................ 4
Manual Bender
Product Information .......................... 6
Setup ...................................... 7
Calibration .................................. 8
Unloading the Bender ......................... 9
Operation .................................. 10
Electric Bender
Product Information .......................... 11
Setup ...................................... 12
Calibration .................................. 14
Unloading the Bender ......................... 14
Operation .................................. 15
Measuring the Bend Angle ....................... 16
Bend Data Tables
Fractional Tubing ............................ 17
Metric Tubing ................................24
Fractional Tubing with Metric Dimensions ......... 30
Minimum Length of Last Leg
Fractional Tubing .............................37
Metric Tubing ............................... 38
Fractional Tubing with Metric Dimensions ......... 39
Maintenance .................................. 40
Replacement Parts ............................. 41
Accessories .................................. 43
Troubleshooting ............................... 44
Warranty ..................................... 44
Safety Instructions
READ THIS MANUAL BEFORE USING THE BENCH TOP TUBE BENDER.
WARNING
Statements that identify conditions or practices that could result in death or serious injury.
CAUTION
Statements that identify conditions or practices that could result in minor or moderate injury or damage to property.
CAUTION - EYE PROTECTION
Eye protection must be worn while operating or working near equipment.
CAUTION - PINCH POINTS
Keep hands, loose clothing, and long hair away from moving parts. Injury can occur.
Technical Data
Bending Range
1 to 180°. Do not bend tube in excess of 180°.
Dimensions (tube bender in case)
Width—21 in. (53 cm)
Depth—11 in. (28 cm)
Height—14.5 in. (37 cm)
Weight (tube bender in case, excluding tooling)
Manual unit—75 lb (34 kg)
Electric unit—79 lb (36 kg)
Power Requirements (electric unit)
MS-BTB-1—110 V (ac) 50/60 Hz; maximum current: 10 A
MS-BTB-2—230 V (ac) 50/60 Hz; maximum current: 5 A
Bench Top Bender User’s Manual 3
Tubing Data
■
The Swagelok bench top tube bender bends 1/4, 3/8, 1/2, 5/8, 9/16, 3/4, 7/8, 1 in., and 1 1/4 in. and 6, 10, 12, 14, 15, 16, 18,
20, 22, 25, 28, and 30 mm outside diameter tubing in a variety of wall thicknesses.
■
Tubing should be free of scratches and suitable for bending and flaring.
Fractional Tubing
Suggested Tubing
Ordering Information
Tub e
1 1/4 4.41 0.065/0.120 0.083/0.120
Approx
OD
1/4 1.42 0.028/0.065
3/8 1.42 0.035/0.065 0.035/0.083
3/8 2.20 0.035/0.065 0.035/0.083
1/2 1.42 0.035/0.083
1/2 2.20 0.035/0.065
5/8 1.81 0.035/0.095 0.049/0.095
3/4 2.20 0.049/0.109
7/8 2.64 0.049/0.109
Bend
Radius
1 3.23 0.049/0.120 0.065/0.120
Carbon Steel
Wall Thickness
Min/Max
Dimensions, in.
Stainless Steel
Wall Thickness
Min/Max
High-quality, soft-annealed, seamless
carbon steel hydraulic tubing ASTM
A179 or equivalent. Hardness 72 HRB
(130 HV) or less.
Fully annealed, high-quality (Type 304,
316, etc.) (seamless or welded and
drawn) stainless steel hydraulic tubing
ASTM A269 or A213, or equivalent.
Hardness 80 HRB (114 HV) or less.
Medium-Pressure Tubing IPT Series Tubing
Heav y-Wall
Nominal
Tub e
OD
1/4 1.42 0.065/0.095 0.028/0.065 0.071 0.084
3/8 1.42 0.083/0.134 0.035/0.083 — —
3/8 2.20 0.083/0.134 0.035/0.083 0.086 0.125
1/2 1.42 0.083/0.188 0.049/0.109 — —
9/16 3.23 — — 0.125 0.187
Approx
Bend
Radius
Annealed
Stainless Steel
Wall Thickness
Min/Max
Cold Drawn
1/8 Hard
Stainless Steel
Wall Thickness
Min/Max
Dimensions, in.
Medium-
Pressure
Stainless Steel
Wall Thickness
High-Pressure
Stainless Steel
Wall Thickness
Metric Tubing
Tub e
Approx
OD
Bend
Radius
6 36 0.8/1. 2
10 36 1.0/1.5
12 36 1.0/2.2 1.0/2.0
14 46 1.0/2. 2
15 46 1.0/2. 2
16 46 1.0/2.5 1.0/2.2
18 56 1.2/2.5
20 67 1.2/2.8
22 67 1.2/ 2. 8
25 82 1.2 / 3.0 1.8 /3.0
28 112 1.8 /3.0 1.8/3 .0
30 112 2.0/3.0
Carbon Steel
Wall Thickness
Min/Max
Dimensions, mm
Stainless Steel
Wall Thickness
Min/Max
Suggested Tubing Ordering Information
High-quality, soft-annealed, carbon steel hydraulic
tubing DIN-2391 or equivalent. Hardness 130 HV
(72 HRB) or less.
Fully annealed, high-quality (Type 304, 316, etc.)
stainless steel tubing EN ISO 1127 or equivalent.
Hardness 180 HV (80 HRB) or less.
Suggested Tubing
Ordering Information
Seamless, austenitic, cold-drawn tubing
ASTM A213 or equivalent. Hardness 95
HRB (210 HV) or higher.
4 Bench Top Bender User’s Manual
Single Bend 90.eps
Bend Layout
This bender can be used to form single, offset, and other bends. This section contains information for measuring and marking
the tube prior to bending.
Note: Make all marks 360° around the tube.
Single Bend
1. Place a reference mark at the end of the tube from which you are beginning the measurements.
2. Measure from the reference mark and make a measurement mark on the tube at a distance equal to the length of first
leg. This mark is the vertex of the bend.
3. Measure the bend deduction distance for the angle being bent from the measurement mark (see Bend Data Tables
beginning on page 17) and make a bend mark on the tube.
■ If the bend deduction is positive, place the bend mark toward the reference mark.
■ If the bend deduction is negative, place the bend mark away from the reference mark.
4. Refer to the appropriate Operation section to bend the tube.
Length of First Leg
Reference
mark
Bend
mark
Single Bend
Multiple Bends
The Measure-Bend Method
1. Follow Single Bend steps 1 through 4.
2. Using the vertex of the previous bend as the reference
mark, repeat steps 2 through 4 for the next leg. (The
vertex is where the center lines of the two legs of the
angle intersect.)
Example:
Using 5/8 in. OD tube and an aluminum bend shoe, make a
90° bend 12 inches from the reference mark followed by a
45° bend with 12 inches between bends.
1. Place a reference mark at the end of the tube from
which you are beginning the measurements.
For the rst leg:
2. Measure 12 inches from the reference mark and make
a measurement mark to indicate the end of the first
leg.
3. The bend deduction in the Fractional Tubing Bend
Data table for a 90° bend using 5/8 in. tubing and an
aluminum bend shoe is 1 3/4 in.
4. Place the bend mark 1 3/4 in. from the measurement
mark going towards the reference mark.
5. Bend tube 90° according to the appropriate Operation
section.
For the second leg:
6. Measure 12 inches from the vertex of the 90° bend and
make a second measurement mark, away from the
reference mark.
7. The bend deduction distance in the Fractional Tubing
Bend Data table for a 45° bend using 5/8 in. tubing and
an aluminum bend shoe is 11/16 in.
8. Place a second bend mark 11/16 in. from the second
measurement mark going towards the first bend.
9. Bend tube according to the appropriate Operation
section.
Bend deduction
Length of first leg
Reference
mark
5/8 in. OD
tube
Bend
mark
Bend deduction
11/ 16 i n.
Ver tex
12 in.
Bend
mark
First Bend (90°)
45°
Second Bend (45°)
Measurement
mark
Bend deduction
1 3/4 in.
Center line
Ver tex
Length of
second leg
12 in.
Reverse Bends
The Measure-Bend Method
Sometimes a multiple bend layout will require that a bend
be made in reverse. A reverse bend is made with the end of
the tube opposite the reference mark inserted into the bend
shoe rather than the end with the reference mark.
1. Measure from the vertex of the preceding bend and place
a second measurement mark farther down the tube at a
distance equal to the desired length of the leg.
2. Measuring from that measurement mark, place a bend
mark on the tube at the bend allowance for the angle
being bent. (See Bend Data tables beginning on page
17).
■ If the bend allowance is positive, place the bend
mark away from the preceding bend.
■ If the bend allowance is negative, place the bend
mark in the direction towards the preceding bend.
3. Bend tube according to the appropriate Operation
section.
Note: When loading the tube into the bender to make
a reverse bend, ensure that the end with the
reference mark is not inserted into the bend shoe.
Bench Top Bender User’s Manual 5
Offset Calculations
O
E
L
When offset exists, determine the length of offset (L) before calculating for the adjustment from the tube bend.
To determine the length of offset, select the offset angle (E). Then, multiply the offset dimension (O) by the offset bend
allowance.
Angle Offset Bend Offset (O) Length of Offset (L)
(E) Allowance
22.5° 2.613 × ________ = _______________
30° 2.000 × ________ = _______________
45° 1.414 × ________ = _______________
60° 1.154 × ________ = _______________
6 Bench Top Bender User’s Manual
Manual Bender
Product Information
Bend shoe
Carrying
handle
Roller bracket
assembly
Roller pins
Roller bracket lever
Roller knob
Bend degree wheel
(2 1/2° increments)
Hex drive shaft
D pin
D roller
G pin
G roller
Roller bracket
assembly
Low bendspeed selector
Medium bendspeed selector
Zero reference
mark
Reference mark
Bracket pin
Bracket post
High bendspeed
selector
Drill yoke
support
Bend shoe
Clamp
arm
Hand crank
Support bracket
Aluminum only,
recommended when
using 1 in. or 25 mm
bend shoe.
Roller bracket lever
Bracket post stop
Bracket assembly stop
Roller knob
Bench Top Bender User’s Manual 7
CAUTION
When lifting the bender, first place one hand under
the bender, then pick up the unit by grabbing the
carrying handle with your other hand.
Setup
1. Place the hand crank on the high bend-speed selector.
2. Rotate the hand crank until the zero reference mark
on the hex drive shaft is between the 2 and 3 o’clock
position, when viewed from the operating position.
2 o’clock
Hex drive
shaft
Zero
reference
mark
3. Rotate the roller knob counterclockwise until it stops.
Roller
knob
3 o’clock
5. Install the roller bracket assembly on the bracket post.
Note: The roller bracket assembly stop must be to the
right of the bracket post stop.
Roller
bracket
assembly
Bracket
post stop
Bracket
post
Roller
bracket
assembly
stop
6. Place the roller bracket lever on the bracket pin.
Note: The lever must be fully bottomed on the pin.
7. Lift the roller pins, place the appropriate rollers in the
marked locations on the roller bracket, and replace the
roller pins.
G roller pin
G roller
Roller
bracket
lever
D roller pin
D roller
Roller
bracket
4. Place the appropriate bend shoe on the hex drive
shaft, aligning the zero reference marks on the shoe
and the shaft. The bend shoe must be fully bottomed on
the hex drive shaft.
Zero
reference
Bend shoe
Hex drive
shaft
marks
Note: The roller pins must be fully engaged with the
roller bracket assembly.
8. Mark tube according to Bend Layout.
9. Carefully insert the tube into the bend shoe, past the
clamp arm.
Caution
The end of the tube must extend past the right
edge of the clamp arm to prevent potential
damage to the tube during bending.
Tub e
Bend
shoe
Right
edge
Clamp arm
8 Bench Top Bender User’s Manual
10. Align the bend mark on the tube with the reference
mark on the bend shoe.
Bend
Reference
mark
Bend
mark
shoe
Tub e
11. Turn the roller bracket lever clockwise until the roller
bracket assembly stop makes contact with the
bracket post stop.
Roller
Bracket
post stop
Contact
bracket
assembly
stop
12. Hold the tube and turn the roller knob clockwise until
the G and D rollers both make contact with the tube and
the roller knob is tight.
Note: The rollers may need to be guided onto smaller
diameter tubing.
13. Ensure there is approximately 3/8 in. or 10 mm
clearance between the D roller and the clamp arm of
the bend shoe.
Clamp arm
To decrease clearance:
Rotate the roller knob clockwise while slowly rotating the
hand crank counterclockwise.
Note: The roller knob must be tight.
Note: Do not turn the roller knob after this point or bend
consistency will be affected.
Roller bracket
lever
Hand crank
Calibration
Calibration is the process of positioning the bend degree
wheel to accurately display the angle being generated by the
be n d e r.
Calibration accounts for tube variables and mechanical play
in the bender, which is typically observed as springback.
Different materials, different lots of the same material, and
different wall thicknesses of the same material may exhibit
different bend characteristics.
Once the bender has been calibrated, recalibration is
recommended whenever:
■ OD or wall thickness of tube being bent is changed.
■ The roller knob has been turned after Calibration
completed.
■ The bend degree wheel does not accurately display
the bend angle.
D roller
To increase clearance:
Rotate the roller knob counterclockwise while slowly rotating
the hand crank clockwise and maintaining straight tube.
3/8 in.
1. Place the hand crank on the desired speed selector
for the tube being bent.
■ Low bend-speed selector (1) is suggested for large
diameter or heavy-wall tube.
■ Medium bend-speed selector (2) is suggested for
intermediate size and medium-wall tube.
■ High bend-speed selector (3) is suggested for small
diameter and thin-wall tube.
2. Slowly rotate the hand crank until the tube begins to
deect or bend (looking to the right of the rollers).
■ On low (1) and high (3) bend speeds, rotate the hand
crank clockwise.
■ On medium (2) bend speed, rotate the hand crank
counter-clockwise.
Bench Top Bender User’s Manual 9
3. Keep the hand crank still and rotate the bend degree
wheel to zero.
Caution
Releasing the hand crank while tube is under
load may cause the hand crank to spin, possibly
leading to injury.
4. Rotate the hand crank until the bend wheel displays 5°
less than the desired bend angle. This will prevent setup
scrap due to overbending.
Example: For a desired bend angle of 90°, rotate the hand
crank until the bend degree wheel reads 85°.
5. Unload the bender (see Unloading the Bender) and
measure the bend angle of the tube (see Measuring
the Bend Angle). Make note of this measurement as it
is likely to be different than the angle displayed on the
bend wheel.
6. Reload the tube into the bender, lining up the bend mark
and the reference mark.
7. Rotate the hand crank until the bend degree wheel reads
the angle from step 4 (in example: 85°).
The bend angle indicated on the bend degree wheel will
now be very close to the bend angle produced. If further
adjustment is desired repeat steps 6 through 10.
Note: Tube springback is cumulative. Depending on the tube
variables, a smaller bend angle builds up less tube
springback during the bending process than a larger
bend angle. For example, if a 30° bend is attempted
using a bender that was calibrated to make a 90°
bend, the resulting bend may be larger than desired.
Conversely, if a 150° bend is attempted on the same
bender, the resulting bend may be smaller than
desired. It is advised to verify each bend angle.
Unloading the Bender
Note: Do not turn the roller knob to unload the bender.
Doing so will affect bend consistency.
Caution
Releasing the hand crank while the tube is under
load may cause the hand crank to spin, possibly
leading to injury.
1. Rotate the hand crank in the direction opposite that
used to bend the tube.
2. As the hand crank is rotated, gently push the roller
bracket lever counter-clockwise until the rollers swing
away from the tube and the tube can be removed from
the bender.
Note: Do not force the roller bracket lever.
8. Keep the hand crank still and rotate the bend degree
wheel to the measurement noted in step 5 (in example:
88°). This calibrates the bend degree wheel by setting it
to display the actual bend angle being produced.
9. Continue to rotate the hand crank until the bend degree
wheel reads the desired bend angle.
Hand crank
Roller bracket
lever
10. Unload the bender (see Unloading the Bender) and
measure the bend angle of the tube.
10 Bench Top Bender User’s Manual
Operation
Before operating the bender mark the tube (see Bend
Layout) and follow the Setup and Calibration procedures.
CAUTION - PINCH POINTS
1. With the zero reference mark between the 2 and
3 o’clock position, place the hand crank on the desired
speed selector.
■ Low bend-speed selector (1) is suggested for large
diameter or heavy-wall tube.
■ Medium bend-speed selector (2) is suggested for
intermediate size and medium wall tube.
■ High bend-speed selector (3) is suggested for small
diameter and thin-wall tube.
2. Insert the tube carefully into the grooved section of the
bend shoe, past the clamp arm.
CAUTION
The end of the tube must extend past the right
edge of the clamp arm to prevent potential damage
to the tube during bending.
Tub e
Note: If the rollers touch the tube and prevent the stops from
making contact, gently turn the roller bracket lever
clockwise while rotating the hand crank.
Hand crank
Roller bracket
lever
5. Check the following before continuing:
■ The bend mark remains aligned with the reference
mark on the bend shoe.
■ The tube is positioned in the correct plane for bend.
■ The tube will not contact the bender housing during
the bend operation (for a multiple bend).
Bend
shoe
Right
edge
Clamp arm
3. Align the bend mark on the tube with the reference
mark on the bend shoe.
Reference
mark
Bend mark
4. Turn the roller bracket lever clockwise until the roller
bracket assembly stop and the bracket post stop
make contact.
Roller
Bracket
post stop
bracket
assembly
stop
Undesired
tube
contact
6. Rotate the hand crank until you reach the desired bend
angle on the bend degree wheel.
■ On low (1) and high (3) bend speeds, rotate the hand
crank clockwise to bend the tube.
■ On medium (2) bend speed, rotate the hand crank
counter-clockwise to bend the tube.
7. Unload the tube from the bender. See Unloading the
Bender.
8. Verify the bend angle (see Measuring the Bend Angle).
Make adjustments if necessary (see Calibration).
9. Use the hand crank on the high bend-speed selector (3)
to return the bend shoe to the starting position.
Contact
Note: Do not turn the roller knob or bend consistency will
be affected.
Bench Top Bender User’s Manual 11
Electric Bender
Product Information
Carrying handle
Power cord
Bend angle
thumb wheels
Bend shoe
LED display
Roller pins
Rollerbracket
assembly
Roller bracket lever
Roller knob
Foot switch receptacle
Toggle switch
D pin
D roller
G pin
G roller
Roller bracket
Hex drive shaft
Overload indicator
Zero reference
mark
Bend shoe
Reference mark
Bracket pin
Bracket post
Bracket assembly stop
Bracket post stop
Clamp
arm
Support bracket
Aluminum only,
recommended when
using 1 in. or 25 mm
bend shoe.
Roller bracket lever
Roller knob
12 Bench Top Bender User’s Manual
Electric bender must be operated in a safe environment to
avoid risk of re, explosion, or electric shock.
WARNING
Voltage greater than 30 V (ac) is present.
WARNING - KEEP DRY.
Do not expose the equipment to water or wet
locations.
WARNING - FIRE OR EXPLOSION.
Do not use equipment in a combustible or explosive
atmosphere. Flammable liquids or gases could
ignite.
Grounding and Extension Cord Information
WARNING
Electric bender must be grounded against electrical
shock. It is equipped with a three-wire conductor
and three-prong plug to fit a grounded receptacle.
Never connect the green or green/yellow wire to a
live terminal.
WARNING
For safe operation of the electric bender, the
extension cord wire size must meet the following
specifications:
For 0 to 25 ft (0 to 7.5 m), the recommended
minimum wire gauge is 14 AWG or 1.5 mm.
For 25 to 50 ft (7.5 to 15 m), the recommended
minimum wire gauge is 12 AWG or 2.5 mm.
CAUTION
When lifting the bender, first place one hand under
the bender, then pick up the unit by grabbing the
carrying handle with your other hand.
Setup
It is recommended that scrap tube be used during setup and
calibration of the Electric Bench Top Tube Bender.
3. Rotate the roller knob counterclockwise until it stops.
Roller knob
4. Place the appropriate bend shoe on the hex drive
shaft, aligning the zero reference marks on the shoe
and the shaft. The bend shoe must be fully bottomed on
the hex drive shaft.
Zero reference
marks
Bend shoe
Hex drive
shaft
5. Install the roller bracket assembly on the bracket post.
Note: The roller bracket assembly stop must be to the
right of the bracket post stop.
Bracket
post
Bracket
post stop
Roller
bracket
assembly
stop
1. Plug in the power cord.
2. Hold the toggle switch in the unload direction until
the motor stops. The zero reference mark on the hex
drive shaft should now be between the 2 and 3 o’clock
position.
Note: T he toggle switch is programmed to have a
safety time delay of approximately two seconds
between operations.
2 o’clock
Hex drive
shaft
Zero
reference
mark
3 o’clock
6. Place the roller bracket lever on the bracket pin.
Note: The lever must be fully bottomed on the pin.
7. Lift the roller pins, place the G and D rollers in the
marked locations on the roller bracket, and replace the
roller pins.
Note: The roller pins must be fully engaged into the
roller bracket assembly.
G roller pin
G roller
Roller
bracket
lever
D roller pin
D roller
Bracket
pin
Roller
bracket
assembly
Bench Top Bender User’s Manual 13
8. Carefully insert the tube into the bend shoe, past the
clamp arm.
CAUTION
The end of the tube must extend past the right
edge of the clamp arm to prevent potential
damage to the tube during bending.
Tub e
Bend
shoe
Right
Clamp arm
9. Turn the roller bracket lever clockwise until the roller
bracket assembly stop makes contact with the bracket
post stop.
Bracket
post stop
edge
Roller
bracket
assembly
stop
If all three conditions are met, make note of the value
appearing on the three right bend angle thumb wheels
and proceed to Calibration.
If all three conditions are not met:
a. Turn the roller knob counter-clockwise until the tube
can be removed. Remove tube.
b. Advance the right-most bend angle thumb wheel
one digit.
Bend angle
thumb wheel
c. Hold the toggle switch in the bend direction until the
motor stops.
Contact
10. Hold the tube in the bend shoe and turn the roller knob
clockwise until both the G and D rollers make contact
with the tube.
Note: Smaller diameter tube may need to be guided into
the rollers.
11. Once the roller knob is tight, the following conditions
must be met:
■ The roller bracket assembly stop and the bracket post
stop must maintain contact.
■ Both rollers must make contact with the tube.
■ There must be approximately 3/8 in. or 10 mm
clearance between the D roller and the clamp arm of
the bend shoe.
Clamp
arm
D roller
3/8 in.
d. Repeat steps 9 through 11 until all three conditions
are met.
12. Make note of the value on the right-most bend angle
thumb wheel.
Bend angle
thumb wheel
Example only
13. Turn the roller knob counter-clockwise until the tube can
be removed. Remove tube.
14. Advance the two right-most bend angle thumb wheels
until they display 010 or higher.
15. Hold the toggle switch in the bend direction until the
motor stops. Wait two seconds, then hold the toggle
switch in the unload direction until the motor stops.
16. Proceed to Calibration.
14 Bench Top Bender User’s Manual
Calibration
Calibration is the process of accurately accounting for
tube variables and mechanical play in the bender, which
is typically observed as springback. Different materials,
different lots of the same material, and different wall
thicknesses of the same material may exhibit different bend
characteristics.
Once the bender has been calibrated, recalibration is
recommended whenever:
■ OD or wall thickness of tube being bent is changed.
■ The roller knob has been turned after Calibration has
been completed.
1. Set the right-most bend angle thumb wheel to the value
noted in step 12 of Setup. Hold the toggle switch in
the bend direction until the motor stops (do not jog the
switch).
2. Carefully insert the tube into the bend shoe, past the
clamp arm.
CAUTION
The end of the tube must extend past the right
edge of the clamp arm to prevent potential
damage to the tube during bending.
5. Set the bend angle thumb wheels to the desired bend
angle.
6. Hold the toggle switch in the bend direction until the
motor stops (do not jog the switch).
CAUTION - PINCH POINT
7. Unload the bender (see Unloading the Bender) and
measure the bend angle of the tube (see Measuring the
Bend Angle).
If the actual bend is smaller than the desired bend angle:
Subtract the actual bend angle from the desired bend
angle. The difference is the amount that must be added
to the desired bend angle when setting the bend angle
thumb wheels for all subsequent bends made with this
tube.
For example:
The desired bend angle entered is 90°.
The resulting calibration sample measures 86°.
90 – 86 = 4.
The bend angle thumb wheels must be set 4° more
than the desired bend angle for subsequent bends
with this size tube, i.e. for a 90° bend, the bend
angle thumb wheels must be set at 94°.
Bend angle
thumb wheels
Tub e
Bend
shoe
Right
Clamp arm
3. Turn the roller bracket lever clockwise until the roller
bracket assembly stop makes contact with the
bracket post stop.
Bracket
post stop
Contact
4. Hold the tube in the bend shoe and turn the roller knob
clockwise until the G and D rollers both make contact
with the tube.
Note: The rollers may need to be guided onto smaller
diameter tubing.
Note: The clearance between the D roller and the clamp
arm will now be approximately 1/4 in.
Note: Do not turn the roller knob after this point or bend
consistency will be affected.
edge
Roller
bracket
assembly
stop
If the actual bend is larger than the desired bend angle:
Subtract the desired bend angle from the actual
bend angle. The difference is the amount that must
be subtracted from the desired bend angle for all
subsequent bends made with this tube.
For example:
The desired bend angle entered is 90°.
The resulting calibration sample measures 92°.
92 – 90 = 2.
The bend angle thumb wheels must be set 2° less
than the desired bend angle for subsequent bends
with this size tube, i.e. for a 90° bend, the bend
angle thumb wheels must be set at 88°.
8. Make note of this amount.
Note: Tube springback is cumulative. Depending on the tube
variables, a smaller bend angle builds up less tube
springback during the bending process than a larger
bend angle. For example, if a 30° bend is attempted
using a bender that was calibrated to make a 90°
bend, the resulting bend may be larger than desired.
Conversely, if a 150° bend is attempted on the same
bender, the resulting bend may be smaller than
desired. It is advised to verify each bend angle.
Unloading the Bender
Note: Do not turn the roller knob to unload the bender.
Doing so will affect bend consistency.
1. Hold the toggle switch in the unload position until the
motor stops. While holding the toggle switch, gently
turn the roller bracket lever counter-clockwise until the
rollers swing away from the tube.
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