Hitachi N 5024A Technical Data And Service Manual
TECHNICAL DATA
AND
SERVICE MANUAL
STAPLER
N 5024A
SPECIFICATIONS AND PARTS ARE SUBJECT TO CHANGE FOR IMPROVEMENT
LIST No. E014 Sep. 2003
N
MODEL
N 5024A
Hitachi
Power Tools
REMARK:
Throughout this TECHNICAL DATA AND SERVICE MANUAL, a symbol(s)
is(are) used in the place of company name(s) and model name(s) of our
competitor(s). The symbol(s) utilized here is(are) as follows:
Symbols Utilized
Competitors
Company Name
Model Name
SENCO
PW-2”
R
PASLODE
3200-W16
Y
BOSTITCH
450S2
P
CONTENTS
Page
1. PRODUCT NAME...........................................................................................................................1
2. MARKETING OBJECTIVE .............................................................................................................1
3. APPLICA TIONS..............................................................................................................................1
4. SELLING POINTS ..........................................................................................................................1
5. SPECIFICATIONS ..........................................................................................................................2
5-1. Specifications................................................................................................................................. 2
5-2. Staple Selection............................................................................................................................. 3
5-3. Staple Driving Force ...................................................................................................................... 4
5-4. Optional Accessories ..................................................................................................................... 4
6. COMPARISONS WITH SIMILAR PRODUCTS..............................................................................5
7. PRECAUTIONS IN SALES PROMOTION .....................................................................................6
7-1. Handling Instructions ..................................................................................................................... 6
7-2. Warning Label................................................................................................................................ 6
7-3. Related Laws and Regulations ...................................................................................................... 7
8. MECHANISM AND OPERATION PRINCIPLE ...............................................................................8
8-1. Mechanism .................................................................................................................................... 8
8-2. Operation Principle ........................................................................................................................ 9
9. TROUBLESHOOTING GUIDE .....................................................................................................13
9-1. Troubleshooting and Correction................................................................................................... 13
9-2. Possible Causes and Correction of Air Leakage ......................................................................... 15
10. DISASSEMBLY AND REASSEMBLY ........................................................................................17
10-1. General Precautions in Disassembly and Reassembly ............................................................. 17
10-2. Disassembly and Reassembly of the Output Section................................................................ 18
10-3. Disassembly and Reassembly of the Control Valve Section ..................................................... 22
10-4. Disassembly and Reassembly of the Driving Section and the Magazine Section..................... 24
11. INSPECTION AND CONFIRMATION AFTER REASSEMBLY ..................................................25
12. STANDARD REPAIR TIME (UNIT) SCHEDULES .....................................................................26
Assembly Diagram for N 5024A
--- 1 ---
1. PRODUCT NAME
Hitachi Stapler, Model N 5024A [50 mm (2")]
2. MARKETING OBJECTIVE
The Model N 5024A wide crown stapler has been released following the current Model N 5008AC medium crown
stapler. The new Model N 5024A is expected to expand our share of the stapler market in North America.
Primary differences from the Model N 5008AC are described below.
(1) The weight of the Model N 5024A is 2.1 kg (4.7 lbs.) and it is lighter than our competitors, R, Y and P, thanks to
the adoption of the plastic magazine. The staple shoulder sliding portion of the magazine is wear-resistant.
(2) The driving speed is faster than our competitors thanks to the adoption of the 2-valve/cylinder drive system
that is well reputed in the current Models NV 45AB2, N 5008AC and so on.
(3) The handle is equipped with a cylindrical grip rubber for comfortable fitting and durability.
(4) The driving depth is easily adjustable by tool-less adjuster.
3. APPLICA TIONS
Insulation sheathing
Wire lathing
4. SELLING POINTS
Rapid driving and
quick response
Grip rubber
Plastic magazine
with stainless plate
Quick jam-release
Depth adjustment
--- 2 ---
Optional accessories
Staple capacity
2.1 kg (4.4 lbs.)
1.05 ltr/cycle at 7 kgf/cm2 (0.037 ft3/cycle at 100 psi) (1.05 ltr/cycle at 6.9 bar)
Corrugated cardboard box
Min. 3 staples/sec.
Driving speed
365 mm x 250 mm x 85 mm
(14-3/8" x 9-13/16" x 3-11/32")
150 staples
Dimensions
(Length x Height x Width)
Staple feed system
3/8" NPT thread
Standard accessories
Weight
Spiral spring
Air consumption
Air inlet
Packaging dimensions
(Length x Height x Width)
Packaging
436 mm x 96 mm x 309 mm
(17-5/32" x 3-25/32" x 12-5/32")
Hex. bar wrench for M5 screw (Code No. 944459)
Safety glasses (Code No. 875769)
Sequential trip mechanism kit (Single-shot) (Code No. 876762)
Pneumatic tool lubricant (1 oz oil feeder) (Code No. 877153)
Pneumatic tool lubricant (4 oz oil feeder) (Code No. 874042)
Pneumatic tool lubricant (1 oz oil feeder) (Code No. 876212)
5. SPECIFICATIONS
5-1. Specifications
Reciprocating piston type
Model
Driving system
N 5024A
Operating pressure
5 --- 8.5 kgf/cm2 (70 --- 120 psi, 4.9 --- 8.3 bar) (Gauge pressure)
--- 3 ---
5-2. Staple Selection
The Model N 5024A utilizes medium crown staples, gauge #16, 1" width crown collated by adhesive.
Applicable staple dimensions are shown below.
CAUTION: Ensure that staples are as specified in Fig. 1. Other gauge staples and other crown width
staples will cause clogging of staples and subsequent damage to the stapler.
Minimum
Staple gauge #16, 1" crown
Fig. 1 Dimensions of staple
Maximum
--- 4 ---
5-3. Staple Driving Force
Figure 2 shows by type of wood and staples, the stapler output energy provided by the supply pressure and the
stapling energy required for driving the staple flush. Air pressure which exceeds the intersecting point between
the stapler output energy and the stapling energy required for driving the staple allows the staple to be fully
driven.
For example, when driving a staple of 50 mm length (2") into a workpiece of hemlock with the Model N 5024A, a
pressure of about 7.7 bar (7.8 kgf/cm2, 111 psi) allows the stapler to drive the staple flush with the wood surface.
A pressure beyond this value causes the staple head to be driven below the wood surface. Figure 2 should be
used as reference data because those values vary depending on the type, moisture content, and grain of wood.
Fig. 2 Required stapling energy and stapler output energy
5-4. Optional Accessories
Sequential trip mechanism kit (Single shot) (Code No. 876762)
A sequential trip mechanism kit is provided as an optional accessory for the Model N 5024A. By using this
optional accessory, a staple is driven by pressing the pushing lever first against a workpiece and then pulling the
trigger (single-shot operation), and no staple is driven when pulling the trigger first and then pressing the pushing
lever against a workpiece. Please recommend the sequential trip mechanism kit to the customers who want to
use it. Salespersons must instruct the customers to read the Handling Instructions attached to the sequential trip
mechanism kit and also the Handling Instructions of the Model N 5024A thoroughly for correct use.
--- 5 ---
With wrench
5 to 8.5 kgf/cm
2
(70 to 120 psi)
356 mm x 225 mm x 64 mm
(14" x 8-7/8" x 2-17/32" )
0.91 ltr./cycle
(.032 ft
3
/cycle)
160
2.3 kgf (5.1 lbs.)
P
Single-touch
operation by hand
12.5 mm to 50 mm
(1/2" to 2")
22.2 mm (.874")
1/2"
Driving depth
adjustment mechanism
Single-touch
operation by hand
None
6. COMPARISONS WITH SIMILAR PRODUCTS
Maker
HITACHI
Air consumption at
7 kgf/cm
2
(100 psi)
Operating pressure
Jam-release
Weight
Dimensions
(L x H x W)
Model name
Staple capacity (Max.)
5 --- 8.5 kgf/cm
2
(70 --- 120 psi)
365 mm x 250 mm x 85 mm
(14-3/8" x 9-13/16" x 3-11/32")
N 5024A
1.05 ltr./cycle
(.037 ft
3
/cycle)
150
Single-touch
operation by hand
2.1 kgf (4.7 lbs.)
5.6 --- 7.7 kgf/cm
2
(80 --- 110 psi)
318 mm x 241 mm x 69 mm
(12-1/2" x 9-1/2" x 2-3/4" )
0.95 ltr./cycle
(.034 ft
3
/cycle)
140
2.5 kgf (5.4 lbs.)
R
With tool
Applicable
staples
#16 gauge
wire
Length
Inside width
25 mm to 50 mm
(1" to 2")
23.3 mm (.917")
Outside width
1"
25 mm to 50 mm
(1" to 2")
23.3 mm (.917")
1"
With wrench
4.2 to 8.4 kgf/cm
2
(60 to 120 psi)
356 mm x 241 mm x 80 mm
(14" x 9-1/2" x 3- 1/ 8" )
0.99 ltr./cycle
(.035 ft
3
/cycle)
150
2.2 kgf (4.9 lbs.)
Y
Single-touch
operation by hand
19 mm to 50 mm
(3/4" to 2")
20.4 mm (.803")
15/16"
--- 6 ---
7. PRECAUTIONS IN SALES PROMOTION
In the interest of promoting the safest and most efficient use of the Model N 5024A Stapler by all of our customers,
it is very important that at the time of sale the salesperson carefully ensures that the buyer seriously recognizes
the importance of the contents of the Handling Instructions, and fully understands the meaning of the precautions
listed on the Warning Label attached to each tool.
The Model N 5024A Stapler is designed for continuous staple driving. At time of sale, the salesperson must
inform the customer that the sequential trip mechanism kit which can change the Model N 5024A to a single-shot
stapler is optionally available, and recommend it to the customers who want to use it. Refer to the leaflet attached
together with the Handling Instructions for details.
7-1. Handling Instructions
Although every effort is made in each step of design, manufacture, and inspection to provide protection against
safety hazards, the dangers inherent in the use of any pneumatic tool cannot be completely eliminated.
Accordingly, general precautions and suggestions for use of pneumatic tools, and specific precautions and
suggestions for the use of the pneumatic stapler are listed in the Handling Instructions to enhance the safe,
efficient use of the tool by the customer.
Salespersons must be thoroughly familiar with the contents of the Handling Instructions to be able to offer
appropriate guidance to the customers during sales promotion.
7-2. Warning Label
Each Model N 5024A unit is provided with a Warning Label (illustrated below) which lists basic safety precautions
in its use. Carefully ensure that customers fully understand and follow these precautions before using the tool.
--- 7 ---
7-3. Related Laws and Regulations
As nailers and staplers are designed to instantaneously drive nails and staples, there is an ever-present danger of
misfiring and subsequent possible serious injury. Accordingly, close attention in handling is absolutely necessary
at all times. Carefully ensure that the customer is fully aware of the precautions listed in the Handling Instructions
provided with each unit.
While there are no specific safety regulations, there are related items in various general safety regulations with
which the salespersons should be familiar in order to properly advise the customer. Please check your national
and/or local regulations for applicable items. Some applicable items are outlined below.
The U.S.A:
OSHA 1926.102 Eye and face protection
1926.302 Power-operated hand tools
ANSI SNT-101-1993 Portable, Compressed-Air-Actuated,
Fastener Driving Tools-Safety Requirements for
--- 8 ---
8. MECHANISM AND OPERATION PRINCIPLE
8-1. Mechanism
As illustrated in Fig. 3, the Model N 5024A can be generally divided into four sections:
output section, control valve section, driving section and magazine section.
The driving section (nose and piston) and the magazine section have been newly designed though its basic
construction is the same as that of the Model N 5008AC (valve section is common to the Model N 5008AC).
Primary differences from the Model N 5008AC are described below.
Output section
........
The piston (driver blade) has been newly designed according to the shape of the
staple firing gate. Owing to the enlargement of the driver blade, the piston bumper has
been newly designed.
Driving section
........
All the parts have been newly designed for driving staples.
If staples are clogged in this section, they can be easily released simply by pulling
the lock lever by hand.
Magazine section
....
All the parts have been newly designed for driving staples.
The magazine cover is opened by pulling the staple feeder backward for easy loading or
replacement of staples.
The <Bold> numbers in the figure below correspond to the numbers in "8-2. Operation Principle".
Fig. 3 Construction
Exhaust Vent < 3 >
Return Air
Chamber < 8 >
Driver Blade < 7 >
Cylinder < 6 >
Piston < 4 >
Piston
Bumper < 9 >
Nose <10>
Blade guide
Pushing lever (A)
Accumulator < 1 >
Control valve
section
Exhaust cover
Cylinder Spring <5>
Trigger valve portion
Magazine ass'y
Staple feeder
Magazine section
Safety valve portion
Driving section Output section
Exhaust Valve < 2 >
Lock lever
Firing gate
Handle arm
Magazine cover
Guide plate
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