Brother S-7200B User manual

Clean sewing without oil staining (S-7200B/S-7220B)
A lubrication-free rotary hook is used and no oil is supplied to the areas of
the needle bar, thread take-up or hook.
Complete dry type (S-7200B-5)
Max. sewing speed 4,000rpm
This type is equipped with a sealed oil tank, supplying constant clean oil
only to the rotary hook. It is also possible to stop the lubrication to the
rotary hook and use a lubrication-free rotary hook.
Semi-dry type (S-7200B/S-7220B-3)
Max. sewing speed 5,000rpm
This type is equipped with a sealed oil tank, supplying constant clean oil
only to the minimum parts requiring lubrication.
Minimum lubrication type (S-7200B/S-7220B-0)
Max. sewing speed 5,000rpm
needle bar, thread take-up
rotary hook oil tank
Further-evolved, clean direct-drive lock stitchers.
Adding the needle feed type to the lineup, the machines provide quality sewing
for a wide range of applications.
Single needle direct drive straight lock stitcher
with thread trimmer
•Good response, comfortable sewing
•Clean sewing without oil staining
•User-friendly operation panel
•Comfortable operation
with low noise and vibration
•Easy maintenance
•Economical models
with low power consumption
S-7200B
Single needle direct drive needle feed lock stitcher
with thread trimmer
S-7220B
S-7200B-433

Smooth sewing with direct drive system (S-7200B/S-7220B)
The industry’s most efficient energy savings (S-7200B/S-7220B)
Low noise and vibration allow stress-free operation (S-7200B/S-7220B)
Excellent sewing capability for a wide range of materials (S-7200B/S-7220B)
Speed(rpm)
(Second)
AC servo motor
/ V belt
EC servo
/ V belt
Time required to reach maximum sewing speed
(Operation rate)
Power consumption
EC motor Clutch motor AC servo motor
16mm
The needle bar stroke and feed dog track
are specially designed for light and difficult-
to-sew materials. Fine finishes without
puckering or stitch slippage are available
even with slippery or stretch materials.
Light and difficult-to-sew
materials spec. (S-7200B-
 S)
The thread take-up stroke can be
changed to the longer stroke for heavy
materials with two-step changeover. The
range of sewing capability has been
enlarged toward heavier materials.
Medium materials spec.
(S-7200B-3)
The height of the feed dog is up to a maximum of 1.3 mm. Materials
can securely be fed in flat and overlapped. When the needle
penetration resistance is increased in extra-thick overlapping part
sewing, the needle penetration force is automatically increased by
the vibration control. (All specifications are provided with this needle
penetration force boosting function as standard. Patent applied for.)
Heavy materials spec. (S-7200B/S-7220B-5)
The S-7200B and S-7220B come with the direct drive system
most suitable for lock stitching process in which operator
control is essential.
The proven, reliable direct-drive mechanism works with
Brother’s original AC servo motor developed in-house. This
enables quicker starting and stopping of sewing and provides
good responsiveness to the operator’s control. Delicate speed
control in curve sewing can be made as desired.
The internal AC servo motor, designed through with magnetic
field analysis, is the most compact in the industry. As the
motor’s driving force is transmitted directly to the mechanisms
without a V-belt, energy loss can be reduced to a minimum.
Electrical power consumption has been lowered to
approximately 50%* of that of the V-belt driven system (AC
servo motor). The S-7200B and S-7220B are the most energy-
saving models in the industry.
*At a sewing speed of 5,000 rpm
The operation noise of the solenoids of reverse feed changeover, thread trimming and thread wiping has been reduced. Sound during sewing has been
improved in sound pressure and sound quality. Offensive sound and vibration are reduced to a minimum, helping reduce stress and fatigue of operators.
Medium materials Heavy materials
Light and difficult-
to-sew materials
Light and difficult-to-sew
materials spec. Medium materials spec.
Underwear, Foundation
Shirts, Blouse Ladies’ wear
Men’s wear Casual wear
Working wear Jeans
Heavy materials spec.
Conventional
model

The S-7200B’s advanced-function model with needle feed.
Having no material slippage, quality finish with uniform seams is available.
S-7220B
Single needle direct drive needle feed lock stitcher with thread trimmer
The needle feed amount is
available up to 20% increase
of the lower feed amount.
Material slippage
can be prevented
The max. stitch length of
heavy materials (-405) spec.
is 5.5 mm. It meets a wide
range of stitches such as for
elaborate-designed jeans.
Meeting designs
with long stitches
With the adoption of the most
advanced lubrication-free
technology, the amount of the
oil lubricated to the area of the
needle bar and thread take-up
has substantially been
reduced. Collection of oil
around the jaw area is not
necessary.
Oil staining is prevented
<Examples of suitable materials and processes>
- Slippery materials (Sportswear, rain wear)
- Different materials (Waist lining sewing of skirt and slacks)
- Overlapping parts (Stitching of jeans)
- Lengthy articles (Curtain, quilt cover)
- Sewing requiring quality (Placket stitching of polo shirt)
- Materials difficult to feed (Coat etc. Quilting / fleece)
- preventing material slippage, skipped stitches and stitch gathering,
for enhanced sewing quality
- producing uniform finishes unaffected by operator skill variation
The S-7220B contributes to:
Adding the needle-feed function to the S-7200B, this model has been produced. With the needle penetrating the
material, the needle and feed dog feed the material synchronously, minimizing material slippage. It is suitable
for the sewing of slippery or multiple-laid materials, and meets quality sewing with diversified materials.
Waist lining sewing of
men’s trousers and ladies’ slacks
Waist lining
sewing of skirts
Waist belt stitching of jeans
Jeans pocket
sewing
Jeans side
stitching
Placket stitching of
polo shirt

Providing ease of operations (S-7200B/S-7220B)
Preventing needle breakage at reverse stitching (S-7200B/S-7220B)
User-friendly operation panel (S-7200B/S-7220B)
(Treadle depression amount)
16mm16mm
71mm
150mm
A large arm pocket allows easy
material handling. The pulley
operation is also easy with the
adoption of a compact motor, having
the distance to the pulley short.
Smooth material handling
Hinge position
out of the way
Quick back
switch close
at hand
Good view of
needle area
Smooth set
and removal
of materials
Selectable
acceleration at
start of sewing
The bobbin winder is located at
the top of the machine arm. It is
easier to adjust the bobbin
thread amount and set and
remove a bobbin.
Easy-to-use bobbin winder
The machines are equipped with
some attachment taps on the top
of the beds for the use of
attachments on the market.
Support for use of attachments
When reverse stitching is performed with thick materials (with the quick back switch), needle breakage tends to
occur. With the thorough analysis of its cause, the function preventing needle breakage has been introduced.
Symmetrical layout easy to remember
Functions are grouped and color-coded by operation
object so that users are not puzzled at operations.
Two-color display and pictograms, easy to grasp
The display is shown with two colors, orange and green,
distinguishing contents of displayed items. Pictograms
easy to grasp
are also used.
Digital setting of maximum sewing speed
The maximum sewing speed can easily be set by
entering a numeric value. The sewing speed can be
changed with checking the sewing speed control display
visually.
Number of stitches are counted
The number of stitches, which have been
sewn, is counted. When the number reaches
to the number preset by a user, the machine
notifies it with the pictogram and sound. It can
be used as a measure of the lower thread’s
used amount or the sewn length, and as a
production counter.
Space under the table without
the motor can be utilized
The acceleration can be selected
from among the three types.
505mm
300mm
136mm

Easy maintenance (S-7200B/S-7220B)
Environment-conscious (S-7200B/S-7220B)
Options (S-7200B/S-7220B)
Enhanced sewing quality (S-7200B/S-7220B)
16mm
Sewing
direction
The industry’s most energy saving
A significant reduction of lubrication oil consumption
Greasing timing is notified automatically
(S-7200B/S-7220B-  3  , S-7200B-  5  )
Brother has established our original “Brother Green Label” for the
products in conformity with ISO 14021 and JIS Q14021. The S-7200B
and S-7220B are certified as environment-conscious sewing machines
according to “Brother Green Label” standard.
The duration of the grease has
been increased to more than three
times that of the conventional
model (S-7200A). The frequency
of greasing can be reduced,
saving on additional maintenance.
Duration of the grease is increased
(S-7200B/S-7220B-  3  , S-7200B-  5  )
Greasing timing is calculated with
the running condition such as motor
revolutions, and automatically
notified on the panel for operational
ease. Please use Brother’s special
grease offering excellent durability.
Considerate of safe maintenance
The amount of oil in the gearbox
can be checked visually. The
gearbox has a heat-discharging
structure with a fin.
Gearbox oil amount can be
checked at one view
With the safety sensor detecting,
the motor does not start while
the machine head is tilted back,
even when the treadle is
depressed.
No lubrication required (S-7200B-5)
Lubrication is not necessary with the complete dry type, which uses a lubrication-free rotary hook and
has no oil around the needle bar, thread take-up or rotary hook.
•Thread wiper device assy. (SA1374-301)
•Solenoid-type presser foot lifter set (SA1397-001) / Knee switch assy. (S25457-101)
•Material edge sensor (J80975-001) •Option actuator switch set (SA2407-001)
The presser foot adjusting screw has
a scale on it for easier control of the
presser foot pressure with numeric
value. The
pre
ssure can
be reproduced
easily and
accurately.
Optimal presser foot pressure
The thread tension can be
maintained when the presser
foot is lifted at corner stitching,
to obtain fine finishes.
Selectable tension release operation
It is suitable for light
materials which tend
to have puckering at
reverse stitching.
Condensed stitching
Material slippage with stretch materials and
raised fabrics can be prevented, and
damage to the fabrics can be reduced.
Handling in sewing
three-dimensional
articles with
different curves
can be made
easier.
Minute-adjustable pressing level
The rotary-type thread
trimmer performs stable
thread trimming regardless of
materials
of threads.
Stable rotary-type thread trimmer
Having no V-belt enables to
keep the sewing products
clean without shaving of
the belt.

Specifications
S-7200B-
0
3
5
Minimum lubrication
Semi dry
Complete dry
Lubrication type
S
3
5
Light-weight and difficult-to sew materials
Medium materials
Heavy materials
Use
*1 When sewing at a sewing speed of 4,000 rpm and above, set the stitch length to 4.2 mm and under.
*2 When sewing at a sewing speed of 4,000 rpm and above, set the stitch length to 3.5 mm and under.
*3 When sewing at a sewing speed of 3,000 rpm and above, set the stitch length to 4.5 mm and under.
*4 When using a lubrication-free rotary hook, operate the machine at a sewing speed of 4,000 rpm and under.
*5 Special specification depending on the area. Please ask your local Brother sales office for details.
5,000 rpm*15,000 rpm*2
5mm 4.2mm 4.2mm5mm 4.5mm5mm 4.5mm5.5mm
4,500 rpm*1 4,000 rpm 4,000 rpm4,000 rpm 4,000 rpm*3 4,000 rpm
High-speed spindle oil
Rotary hook
Needle bar High-speed spindle oil
High-speed spindle oil
High-speed spindle oil
High-speed spindle oil
Brother’s special grease
High-speed spindle oil
Brother’s special grease

Brother’s special grease
220-3,000 rpm
Presser bar lifter: 6 mm, knee lifter: 16mm
5,000 rpm*1
5mm
11-18
Lubricated / For
medium materials
4 rows
0.8mm
31mm
1.2mm
4 rows
Lubricated / For
heavy materials
19-22
35mm
0.8mm
4 rows
Lubricated / For
light materials
NS9-11
29mm
0.8mm
4 rows
Lubrication
-free RP hook
NS9-11
29mm
1.2mm
Lubricated / For
heavy materials
19-22
35mm
1.0mm
Lubricated / For
medium materials
11-18
33mm
0.8mm
4 rows
Lubricated / For
medium materials
11-18
31mm
1.0mm
Lubricated / For
medium materials
11-18
33mm
0.8mm
4 rows 4 rows 4 rows 4 rows
Lubrication
-free RP hook
11-18
31mm
Machine head 44 kg, Control box 6.1 kg, Operation panel 0.8 kg
Machine head 48 kg, Control box 6.1 kg, Operation panel 0.8 kg
Width: 300 mm, Height: 136 mm
517.5mm x 178mm
Built-in on the machine arm
Direct drive
AC servo motor (4-pole, 450 W)
Microprocessor
Single phase 100-120V, 200-240V, 3-phase 200-240V, 380-415V, Power rating 400VA
1,800 rpm
4
S-7220B-4
0
3
Minimum lubrication
Semi dry
Lubrication type
Quick back
3
5
Medium materials
Heavy materials
Use

Thread wiper
Lubrication type
Application
Max. sewing speed
Sewing speed of end backtacking
Max. stitch length
Presser foot height
Needle bar stroke
Needle(DBx1 DPx5)
Rotary hook*4
Feed dog
Height of feed dog
Weight
Arm pocket size
Bed size
Bobbin winder
Machine head driving system
Motor
Control circuit
Power supply / Power consumption
Lubrication
oil
305, 405 33S,43S 333,433 45S 453 403 405 433 *5
Medium
materials
Medium
materials
Medium
materials
Medium
materials
Heavy
materials
Heavy
materials
Light materials
and difficult-to
sew materials
Light materials
and difficult-to
sew materials
Minimum lubrication Semi dry Complete dry Minimum lubrication Semi dry
303,403
Medium
materials
S-7200B S-7220B
Sewing speed of start
backtacking and
continuous backtacking
3
Quick back

4
Thread wiper
G-40
G-0 Without operation panel
With operation panel
MD-741C/751C-
Control box
Single needle direct drive straight lock stitcher
with thread trimmer
Single needle direct drive needle feed lock stitcher
with thread trimmer
15-1,Naeshiro-cho,Mizuho-ku,Nagoya 467-8561, Japan.
Phone:[phone] Fax:[phone] http://www. brother. com/
To preserve environment, this catalog is produced using the ECF paper (Elemental Chlorine-Free) and SOY INK.
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Printed in Japan 2006.6. I 6060907 B Vol.1
Product specifications are subject to change for improvement without notice. Please read instruction manual before using the machine for safety operation.