Duo-fast DF350S User Manual
MODEL DF350S
20° Round Head Framing Nailer
IMPORTANT!
DO NOT DESTROY
It is the customer’s responsibility to have all
operators and service personnel read and
understand this manual.
PRINTED IN U.S.A.
© 2008, Illinois Tool Works, Inc.
405669-3
OPERATING MANUAL AND
SCHEMATIC
1
INTRODUCTION
The DUO-FAST® DF350S strip nailer is a quality-built tool designed for use in residential
framing applications. This tool will deliver efficient, dependable performance when used
according to the manufacturer’s guidelines. Please study this manual including the safety
instructions to fully understand the operation of this tool.
TABLE OF CONTENTS
TOOL AND FASTENER SPECIFICATIONS ................................................................. 3
SAFETY INSTRUCTIONS ............................................................................................. 4
TOOL INSTALLATION AND OPERATION ................................................................ 5-6
AIR SYSTEMS ............................................................................................................. 7-8
FEATURES AND BENEFITS .......................................................................................... 9
EXPLODED VIEW AND SPARE PARTS LIST ....................................................... 10-11
MAINTENANCE ....................................................................................................... 12-13
TROUBLESHOOTING .................................................................................................. 14
WARRANTY .................................................................................................................. 15
ACCESSORIES ........................................................................................................... 16
2
TOOL AND FASTENER SPECIFICATIONS
TOOL SPECIFICATIONS
MODEL NO. DF350S (Part# 502200)
HEIGHT 13”
WIDTH 5"
LENGTH 21"
WEIGHT 8 lbs. 1oz.
OPERATING PRESSURE 80 to 120 p.s.i. (5.5 to 8.3 bars)
FASTENER SPECIFICATIONS
NAIL LENGTH 2" - 3-1/2"
SHANK DIAMETER .113 - .148
TOOL AIR FITTINGS:
This tool uses a 3/8” N.P.T. male plug. The fitting must be capable of discharging tool air
pressure when disconnected from the air supply.
OPERATING AIR PRESSURE:
80 to120 p.s.i. (5.5 to 8.3 bars). Select the operating air pressure within this range
for best tool performance.
DO NOT EXCEED THIS RECOMMENDED OPERATING PRESSURE.
3
SAFETY INSTRUCTIONS
SAFETY FIRST
These safety instructions provide information necessary for safe operation of Duo-Fast® tools. DO NOT
ATTEMPT TO OPERATE THE TOOL UNTIL YOU READ
AND UNDERSTAND ALL SAFETY PRECAUTIONS
AND MANUAL INSTRUCTIONS.
WEAR EYE AND HEARING PROTECTION
Always wear hearing and eye protection devices, that
conform to ANSI Z87.1 requirements, when operating
or working in the vicinity of a tool. As an employer you
are responsible for enforcing the use of eye protection.
Wear hard hats in environments that require their use.
THE TOOL MUST BE USED ONLY FOR THE PURPOSE FOR WHICH IT WAS DESIGNED
Do not throw the tool on the floor, strike the housing in
any way or use the tool as a hammer to knock
material into place.
NEVER ENGAGE IN HORSEPLAY WITH THE TOOL
The tool is not a toy so do not use it like one. Never
engage in horseplay with the tool or point it at yourself
or any other person, even if you think it is not loaded.
NEVER ASSUME THE TOOL IS EMPTY
Check the magazine for fasteners that may be left in the
tool. Even if you think the tool is empty or disconnected,
never point it at anyone or yourself. Unseen fasteners
could fire from the tool.
NEVER CLAMP THE TRIGGER IN A LOCKED OR
OPERATING POSITION
The trigger of the tool must never be tampered with,
disabled or clamped in a locked or operating position
since this will cause the tool to drive a fastener any time
the work contacting element is depressed.
DO NOT LOAD FASTENERS WITH THE AIR LINE
CONNECTED, OR WITH THE TOOL TRIGGER OR
WORK CONTACTING ELEMENT DEPRESSED
When loading fasteners into the tool be sure you disconnect the air line and that you do not depress the trigger
or work contacting element.
OPERATE THE TOOL ONLY ON A WORKPIECE
The tool should be operated only when it is in contact
with the workpiece. Even then you should be careful
when fastening thin material or working near the edges
and corners of the workpiece since the fasteners may
drive through or away from the workpiece.
DO NOT DISABLE OR REMOVE THE WORK
CONTACTING ELEMENT
This tool is equipped with a safety mechanism, called
a work contacting element, to help prevent accidental
firing. Never tamper with, disable or remove the work
contacting element. Do not use the tool unless the work
contacting element is working properly. The tool could
fire unexpectedly.
DISCONNECT THE TOOL WHEN NOT IN USE
Always disconnect the tool from the air line when it
is not in use, when you leave the work area or when
moving the tool to a new location. The tool must
never be left unattended because people who are
not familiar with the tool might handle it and injure
themselves or others.
CARRY THE TOOL ONLY BY THE HANDLE
Always carry the tool by the handle only. Never carry
the tool by the air hose or with the trigger depressed
since you could drive a fastener unintentionally and
injure yourself or someone else.
DO NOT WEAKEN THE TOOL HOUSING
The tool housing is a pressure vessel and should never
be weakened by having your company’s name, area of
work or anything else stamped or engraved into its
surface.
DISCONNECT THE TOOL WHEN PERFORMING
REPAIRS AND CLEARING JAMS
Never attempt to clear a jam or repair a tool unless you
have disconnected the tool from the air line and
removed all remaining fasteners from the tool.
ALWAYS USE THE PROPER FITTING FOR THE
TOOL
Only MALE pneumatic type air connectors should be
fitted to the tool, so that high pressure air in the tool is
vented to atmosphere as soon as the air line is
disconnected.
NEVER install FEMALE quick disconnect couplings on
the tool. Female couplings will trap high pressure air in
the tool when the air line is disconnected, leaving the
tool charged and able to drive at least one fastener.
DO NOT EXCEED THE MAXIMUM RECOMMENDED
AIR PRESSURE
Operate the tool only at the recommended air pressure.
Do not exceed the maximum air pressure marked on
the tool. Be sure the air pressure gauge is
operating properly and check it at least twice a day.
Never use any bottled air or gases such as oxygen to
operate the tool since they could cause the tool to
explode.
INSPECT TOOL FOR PROPER OPERATION
Clean the tool at least daily and lubricate as required.
Never operate a dirty or malfunctioning tool.
USE ONLY DUO-FAST RECOMMENDED PARTS
AND FASTENERS
Use only parts and fasteners specifically designed and
recommended by Duo-Fast for use in the tool and for
work to be done. Using unauthorized parts and
fasteners or modifying the tool in any way creates
dangerous situations. Replace all missing warning
labels---refer to tool schematic for correct placement
and part number.
WARNING
Failure to follow any of the above instructions could result in severe personal
injury to tool user and bystanders or cause damage to tool and property.
Contact your local Duo-Fast Representative for presentation of Duo-Fast’s Safety Awareness Program
4
TOOL INSTALLATION
Your Duo-Fast tool comes ready for immediate use
and can be installed by following these steps:
1. SAFETY - All tool operators and their immediate
supervisors must become familiar with the
operator safety instructions before operating the
tool. The instructions are on page 4 of this manual.
2. Included with each tool is the operating manual
and schematic. Keep these publications for future
reference. An ownership registration card is also
included. This card must be completed and
returned to Duo-Fast immediately to register your
ownership.
3. The plastic cap in the air inlet of the tool must
be removed before the male fitting is installed.
The fitting must be a male pneumatic type that
discharges the air from the tool when the air line is
disconnected.
TOOL OPERATION
Depth of Drive Adjustment
The depth of drive adjustment is made by
turning the thumbwheel on the work contact
element.
If the tool is overdriving (the fastener head
is driven below the work surface), the work
contact element should be moved downward.
If the fasteners stand up (the head is not flush
with the surface), the work contact element
should be moved up.
Adjust the work contact element until the
fastener head depth meets job requirements.
4. Install a filter/regulator/lubricator unit, with a gauge
as close as practical to the tool, preferably within
ten feet. Refer to the Air Systems section of this
manual for air hose requirements and lengths. In
general, no other special installation is required.
5. If the operator is working at a bench or table, it is
usually best to run the air line underneath the
bench. A small tray under the benchtop can hold
the fastener supply and the tool when not in use.
6. If this tool does not work when it is first connected,
do not try to make repairs. Call your Duo-Fast
representative immediately.
ROTATE
THUMBWHEEL
IN EITHER
DIRECTION
WORK
CONTACT
ELEMENT
5
TOOL OPERATION continued
Loading of Nails
Step 1 - Grasp the handle firmly. Pull the follower
all the way to the rear of the magazine
until it is latched into its loading position
by the magazine latch.
Step 2 - Insert one or two strips of nails into the
top of the magazine.
Step 3 - Hold the follower firmly and press the
follower latch. Slide the follower forward
until it contacts the nails.
Switching the Trigger
The tool is manufactured with a trigger that
can be switched from sequential operation to a
bounce drive operation. The trigger is placed in
the sequential operating position when the tool
was manufactured. To switch the trigger to the
bounce operating position, remove the O-ring
and trigger pivot pin from the trigger assembly.
Move the trigger to the bounce operation position
and install the trigger pivot pin and O-ring. The
postion indicator on the tool should now be
pointing to the as shown in the illustration.
▼
Sequential Operation
The sequential operating kit prevents succesive or "bounce"
driving.
■ Depress the work contacting element and hold it against the
work surface before pulling the trigger.
■ After each fastener is driven, completely release the trigger
and lift the tool from the work surface.
Sequential
drive position
Precision Placement Driving
■ Grasp the tool handle firmly and place the bottom of the
work contacting element firmly against the workpiece until it
is completely depressed.
■ Squeeze the trigger to drive the fastener.
Position
indicator
Bounce drive
position
Pivot pin
and o-ring
■ Lift the tool from the workpiece.
■ Repeat the procedure for the next fastener.
Successive (Bounce) Driving
■ Grasp the handle firmly.
■ Squeeze the trigger and move the tool along the workpiece
with a bouncing motion, depressing the work contacting
element at the points where you want to insert a fastener.
■ Keep the trigger depressed and continue to bounce the work
contacing element against the workpiece, positioning the tool
above as carefully as possible.
■ When the desired number of fasteners have been driven,
release the tool trigger to avoid unintentional fastener
discharge.
6
AIR SYSTEMS
For air-powered tools to work their best, the air
supply system must be properly installed and
maintained regularly. A drawing in this section
shows a properly installed air supply system.
Handy checklists for installing and maintaining
air supply systems follow.
Indoor Air System Installation
-Be certain that:
■ All pipes supplying air have a large enough
inside diameter to ensure adequate air supply.
■ The main supply pipe slopes down, away from
the compressor (1/16 inch per foot).
■ Air storage is provided along lengthy air lines.
■ Pipe line branch outlets are at the top of the
main pipe line.
■ Cutoff valves are provided at each branch pipe
line throughout the system.
■ Air hoses are not longer than 150 feet.
■ The air system is lubricated regularly.
■ A regular maintenance program is followed.
Filter/Regulator/Lubricator Units
Filter/regulator/lubricator units that can supply
enough air and protection for Duo-Fast tools
must meet the following specifications:
■ Minimum 3/8 inch NPT port size .
■ 50 micron or fine filters.
■ Regulated pressure from zero to 120 psi.
■ Lubricators designed for low or changing
airflow.
■ Water legs extend from the bottom of each branch
line.
■ A refrigerant-type dryer is installed on the system.
■ Air hoses are kept as short as practical.
■ A regular maintenance program is followed.
Outdoor Air System Installation
-Be certain that:
■ A moisture trap and a filter/regulator/lubricator are
installed at the compressor.
■ Air hoses and fittings are large enough so that air
flow is not restricted. Minimum hose size is 3/8
inch ID with 1/2 inch ID hose used for any
application over 25 feet.
7
AIR SYSTEMS - Continued
Calculating Compressor Size
Use the air consumption chart in the Tool
Schematic for each tool when calculating the
operating requirements for the tools. Duo-Fast
tools are designed to operate efficiently
between 80 and 120 psi and should never be
operated at pressure greater than 120 psi.
The air consumption chart will help you find the
correct compressor size for your application
that will quickly replenish tool air pressure.
To use the chart you will need to know how
many tools will be used and approximately
how many fasteners will be driven each minute
by each tool on the line. Using the equation:
Number of tools X average fasteners/minute/
tool X 1.2 (safety factor) X air consumption
(scfm) @ pressure* (psi) = scfm required.
We can use the following example:
10 tools X 30 fasteners/minute/tool X 1.2 X
0.051scfm* (@100psi) = 18.36 scfm.
*This number is found in the Air Consumption
Chart
Calculated Required Piping
For example, given a 20 hp electric compressor
supplying approximately 80 cfm of air at 120 psi
and a main supply pipe length of 350 feet, we
see by the table the minimum main pipe inside
diameter required for this application is 1-1/4 inch.
IMPORTANT: AIR PRESSURE (80-120psi)
Pneumatic System Maintenance
- Be certain that:
■ Pneumatic fittings are tight and do not leak.
In this example, using the air consumption
chart we find that a compressor providing at
least 19 scfm of air is required. Because in
compressors approximately 1 hp is required to
produce 4 scfm, a compressor of at least 5 hp
is required.
■ Water legs, filters and air lines are drained daily,
and ensure that automatic draining systems are
operating correctly.
■ Air lines are cleared to prevent freezing,
especially in winter.
■ Lubricator operation is checked regularly and
ensure it has an adequate supply of lubricant.
■ The filter element is cleaned every six months.
■ Only regulated air is being used and that each
regulator is operating properly.
8
DF350S FEATURES & BENEFITS
Tool-Less Depth of
Drive
Provides precise control
of nail depth without adjusting
the compressor.
(on other side)
Lock Out
Eliminates blank
firing.
Compact
Design
Able to get into
tight spots
Powerful Motor
Consistently drives
into all engineered
lumber.
Metal
Exhaust Cap
For maximum
durability.
Light Weight Design
Easy to manuever with less arm
fatigue.
Rafter Hook
Conveniently stowes the
tool.
Switchable Trigger
Switches from sequential to
bounce fire.
Top Load Magazine
Holds 2 strips or 70 nails.
9
PARTS LEGEND DF350S, 502200
1 502244 1 Air Deflector
2 502062 1 Air Deflector Gasket
*
3 501299 4 S.H.C.S. 1/4-20 x 1”
4 502235 1 Top Cap
5 502013 1 Top Cap Gasket
*
6 123984 1 Valve Spring
➔
7 502859 1 O-Ring
*
8 211664 1 O-Ring
*
9 1014052 1 Poppet Assembly
10 198028 1 O-Ring
*
11 502032 1 REMOVED
12 502056 1 Exhaust Seal
▲
13 502057 1 S.H.C.S.1/4-20 x 1-1/4” w/ patch
14 502011 1 Piston Seal
*
15 502012 1 Piston
16 502009 1 Sleeve
17 502010 1 Check Band
18 502261 1 Driver Blade
■
*
19 092235 1 O-Ring
*
20 502007 1 Bulkhead
21 401985 1 O-Ring
*
22 500866 1 Bumper
*
23 500729 1
24 502135 1 REMOVED
➔
25 502128 1 Magazine
26 502126 1 Follower
27 502147 1 Latch Bushing
28 502127 1 Follower Body
29 502258 2 P.P.H.S. #6 x 3/4”
30 502146 1 Follower Latch
31 502026 1 Negator Spring
*
32 502025 1 Drum Pin Assembly
33 403796 3 Roll Pin 1/8” x 1-1/4”
34 502017 2 B.H.C.S. 1/4-20 x 3/4”
35 502289 1 Model Label
36 502274 1 S.H.C.S. #8-32 x 1’
37 502188 2 Wear Rod
38 502129 1 Magazine End Cap
39 502237 1 Housing Label Left
40 404325 1 Locknut #8-32
41 502293 1 Lower W.C.E.
Driver Blade Seal
42 502046 1 Upper W.C.E.
43 502049 1 Detent Ball
44 502061 1 Detent Spring
45 404361 1 Roll Pin 1/8” x 1/2”
46 502050 1 Detent Body
47 502055 1 W.C.E. Spring
▲
48 009016 4 S.H.C.S. 5/16-18 x 1” with Patch
49 095417 4 Lock Washer 5/16
50 502125 1 Nose
51 502014 2 Magazine Isolator
*
*
52 502042 1 O-Ring
53 091866 1 Roll Pin 1/8” x 3/4”
54 502053 1 Dual Mode Trigger
55 502040 1 Trip Lever
56 502060 1 Trigger Spring
57 092747 1 O-Ring
*
58 502236 1 Housing Label Right
59 502043 1 Lower Valve Spool
60 502041 1 Trigger Pivot Pin
61 1015358 1 O-Ring
*
62 196345 1 O-Ring
*
63 502288 1 Name Plate/Warning Label
**
64 502033 1 W.C.E. Guide Block
65 502446 1 Valve Pin with O-Rings
➔
66 502059 1 Valve Pin Spring
67 502044 1 Upper Valve Spool
68 197913 1 O-Ring
*
69 502353 1 Housing with Grip
70 502294 1 Rafter Hook
71 502357 1 Rafter Hook Bolt
72 502351 1 Magazine Bridge
73 009041 2 S.H.C.S. 1/4-20 x 3/4”
■
74 442681 2 Locknut 1/4-20
75 417147 1 O-Ring
*
76 502005 1 Housing End Plug
77 501300 2 S.H.C.S. 1/4-20 x 1-1/4”
78 502193 1 Actuation Setting Label
79 502299 1 Thumb Wheel
80 502191 1 Latch spring
81 401955 1 #8 Flat Washer
* Denotes Normal Wear Items.
** Make sure Warning Label (502288) is properly affixed.
Replace if necessary.
Label available at no charge through the Service Parts Dept.
▲ Apply Loctite 242 (Blue) Part No. 093500
Apply Loctite (Green) Part No. 401491
■
Denotes New Change
➔
.098
scf
AIR CONSUMPTION - SCF/FASTENER
AIR PRESSURE - PSIG
10
SAFETY INSTRUCTIONS
WEAR EYE AND HEARING PROTECTION
Always wear hearing protection and eye protection devices, including side shields when operating or working
in the vicinity of a tool.
DO NOT EXCEED MAXIMUM
RECOMMENDED AIR PRESSURE
Operate the tool using only the recommended air
pressure. Do not exceed the maximum air pressure
marked on the tool. Be sure the air pressure gauge is
operating properly and check it at least twice a day.
Never use any bottled air or gases such as oxygen to operate the tool since they could cause the
tool to explode.
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