Wen 3975 Manuale utente
5-INCH PORTABLE
METAL BAND SAW
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Your new tool has been engineered and manufactured to WEN’s highest standards for dependability,
ease of operation, and operator safety. When properly cared for, this product will supply you years
of rugged, trouble-free performance. Pay close attention to the rules for safe operation, warnings,
and cautions. If you use your tool properly and for intended purpose, you will enjoy years of safe,
reliable service.
IMPORTANT:
NEED HELP? CONTACT US!
Have product questions? Need technical support?
Please feel free to contact us at:
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(M-F 8AM-5PM CST)
TABLE OF CONTENTS
Technical Data 2
3
4
5
6
6
7
9
10
11
12
14
General Safety Rules
Specific Safety Rules For Band Saw
Electrical Information
Know Your Band Saw
Assembly
Maintenance
Exploded View & Parts List
Warranty
TECHNICAL DATA
3975, 3975T
120 V, 60 Hz, 4.5A, 400W (S6 40%)
56-1/2 x 1/2 in.
5 x 4-7/8 in. (90°)
3-1/8 x 3-15/16 in. (45°)
5 in. diameter (90°)
3-1/8 in. diameter (45°)
0 to 60°
125 to 260 FPM
56-1/2 in. by 1/2 in. by .024 in.
Bimetal, 8/12 TPI
45 pounds
2
Operation
Model Number:
Motor:
Saw Blade:
Cutting Capacity for Square Material:
Cutting Capacity for Circular Material:
Miter Cut Range:
Blade Speed:
Blade Size:
Blade Specifications:
Weight:
Troubleshooting
Adjustments
3
GENERAL SAFETY RULES
Safety is a combination of common sense, staying alert and knowing how your item works.
To avoid mistakes and serious injury, do not plug in your tool until the following
steps have been read and understood.
1. READ and become familiar with this entire instruction manual. LEARN the tool’s applications, limitations, and
possible hazards.
2. AVOID DANGEROUS CONDITIONS. Do not use power tools in wet or damp areas or expose them to rain.
Keep work areas well lit.
3. DO NOT use power tools in the presence of flammable liquids or gases.
4. ALWAYS keep your work area clean, uncluttered, and well lit. DO NOT work on floor surfaces that are slippery
with sawdust or wax.
5. KEEP BYSTANDERS AT A SAFE DISTANCE from the work area, especially when the tool is operating.
NEVER allow children or pets near the tool.
6. DO NOT FORCE THE TOOL to do a job for which it was not designed.
7. DRESS FOR SAFETY. Do not wear loose clothing, gloves, neckties, or jewelry (rings, watches, etc.) when op-
erating the tool. Inappropriate clothing and items can get caught in moving parts and draw you in. ALWAYS wear
non-slip footwear and tie back long hair.
8. WEAR A FACE MASK OR DUST MASK to fight the dust produced by sawing operations.
Dust generated from certain materials can be hazardous to your health. Always
operate the tool in a well-ventilated area and provide for proper dust removal. Use dust collection
systems whenever possible.
9. ALWAYS remove the power cord plug from the electrical outlet when making adjustments, changing parts,
cleaning, or working on the tool.
10. KEEP GUARDS IN PLACE AND IN WORKING ORDER.
11. AVOID ACCIDENTAL START-UPS. Make sure the power switch is in the OFF position before plugging in
the power cord.
12. REMOVE ADJUSTMENT TOOLS. Always make sure all adjustment tools are removed from the saw before
turning it on.
13. NEVER LEAVE A RUNNING TOOL UNATTENDED. Turn the power switch to OFF. Do not leave the
tool until it has come to a complete stop.
14. NEVER STAND ON A TOOL. Serious injury could result if the tool tips or is accidentally hit. DO NOT store
anything above or near the tool.
4
15. DO NOT OVERREACH. Keep proper footing and balance at all times. Wear oil-resistant rubber-soled foot-
wear. Keep the floor clear of oil, scrap, and other debris.
16. MAINTAIN TOOLS PROPERLY. ALWAYS keep tools clean and in good working order. Follow instruc-
tions for lubricating and changing accessories.
17. CHECK FOR DAMAGED PARTS. Check for alignment of moving parts, jamming, breakage, improper
mounting, or any other conditions that may affect the tool’s operation. Any part that is damaged should be properly
repaired or replaced before use.
18. MAKE THE WORKSHOP CHILDPROOF. Use padlocks and master switches and ALWAYS remove start-
er keys.
19. DO NOT operate the tool if you are under the influence of drugs, alcohol, or medication that may affect your
ability to properly use the tool.
20. USE SAFETY GOGGLES AT ALL TIMES that comply with ANSI Z87.1. Normal safety glasses only have
impact resistant lenses and are not designed for safety. Wear a face or dust mask when working in a dusty environ-
ment. Use ear protection such as plugs or muffs during extended periods of operation.
GENERAL SAFETY RULES
1. To avoid injury from unexpected movement, secure the machine to a bench before operating.
2. The machine must be switched off before inserting materials to be cut in the vise or before removing materials
from the vise after cutting operations have been finished.
3. Keep your hands and fingers a safe distance away from the blade at all times.
4. Never attempt to stop the saw blade by hand.
5. Never remove any cutting chips by hand. Use a brush at all times.
6. Never remove any safety guards or safety equipment from the saw.
7. Never leave the machine during operation.
8. Wear eye protection. Do not wear gloves, a necktie, jewelry, or loose clothing during operation.
9. Make sure the saw is on a firm, level surface and properly secured.
10. Use only the recommended accessories.
11. Use extra caution with very large, very small, or awkwardly-shaped workpieces.
12. Keep hands away from blade at all times to prevent accidental injury.
SPECIFIC RULES FOR BAND SAW
5
ELECTRICAL INFORMATION
IN THE EVENT OF A MALFUNCTION OR BREAKDOWN, grounding provides the path of least resistance
for an electric current and reduces the risk of electric shock. This tool is equipped with an electric cord that has an
equipment grounding conductor and a grounding plug. The plug MUST be plugged into a matching outlet that is
properly installed and grounded in accordance with ALL local codes and ordinances.
DO NOT MODIFY THE PLUG PROVIDED. If it will not fit the outlet, have the proper outlet installed by a
licensed electrician.
IMPROPER CONNECTION of the equipment grounding conductor can result in electric shock. The conduc-
tor with the green insulation (with or without yellow stripes) is the equipment grounding conductor. If repair or
replacement of the electric cord or plug is necessary, DO NOT connect the equipment grounding conductor to a
live terminal.
CHECK with a licensed electrician or service personnel if you do not com-
pletely understand the grounding instructions or whether the tool is properly
grounded.
USE ONLY THREE-WIRE EXTENSION CORDS that have three-pronged
plugs and outlets that accept the tool’s plug as shown in Fig. A. Repair or re-
place a damaged or worn cord immediately.
CAUTION: In all cases, make certain the outlet in question is properly grounded. If you are not sure,
have a licensed electrician check the outlet.
WARNING: This tool is for indoor use only. Do not expose to rain or use in damp locations.
Guidelines for using extension cords
Make sure your extension cord is in good condition. When using an extension cord, be sure to use one heavy
enough to carry the current your product will draw. An undersized cord will cause a drop in line voltage resulting
in loss of power and overheating. The table below shows the correct size to be used according to cord length and
nameplate ampere rating. When in doubt, use a heavier cord. The smaller the gauge number, the heavier the cord.
Make sure your extension cord is properly wired and in good condition. Always replace a damaged extension cord
or have it repaired by a qualified person before using it. Protect your extension cords from sharp objects, excessive
heat and damp/wet areas.
Use a separate electrical circuit for your tools. This circuit must not be less than a #12 wire and should be protected
with a 15 A time-delayed fuse. Before connecting the motor to the power line, make sure the switch is in the OFF
position and the electric current is rated the same as the current stamped on the motor nameplate. Running at a
lower voltage will damage the motor.
WARNING: This tool must be grounded while in use to protect the operator from electric shock.
FIGURE A
AMPERAGE REQUIRED GAUGE FOR EXTENSION CORDS
25 ft. 50 ft. 100 ft. 150 ft.
4.5 A 18 gauge 16 gauge 14 gauge 14 gauge
TABLE OF LOOSE PARTS
1. Metal Band Saw
2. Work Stop with Lock Handle
3. Feet (4)
4. Guide Rail with Hex Nut
6
KNOW YOUR BAND SAW
B
ASSEMBLY
Carefully unpack the band saw and all its parts, and compare against the list below. Do not discard the carton or
any packaging until the band saw is completely assembled.
WARNING: If any part is missing or damaged, do not
plug in the band saw until the missing or damaged part is replaced.
2
3
1
4
Blade Tension Adjustment Knob
Run Switch
Vise Handle
Rubber Feet
Work Stop
Miter Locking Handle
Locking Pin
Variable Speed Adjustment Knob
Power Switch
Blade Guide Locking Handle
Circuit Breaker
A
B
C
D
E
F
G
H
I
J
K
A
C
D
E
F
G
H
I
J
KRefer to the parts and controls in the dia-
gram below. They will be referred to later
in the manual for assembly, adjustment, and
operation instructions.
7
1. Attach the four feet (Fig. B - 1) along each respective corner of
the base.
2. Place the machine on a work bench, and secure it in place by us-
ing the three holes provided in the base (Fig. A).
3. Screw the guide rail into the threaded hole on the vise base.
Tighten the nut to fix it. Use an adjustable wrench to turn the hex
nut and fix the guide rail in place.
4. Attach the work stop (Fig. B - 2) to the guide rail (Fig. B - 3).
Secure it in place by tightening the locking handle.
ASSEMBLY
Fig. A
Fig. B
13
2
ADJUSTMENTS
If you have to make a series of cuts with a uniform
length, use the supplied work stop.
1. Loosen the lock handle (Fig. C - 1).
2. Slide the work lock to the desired distance.
3. Tighten the lock handle again.
: Make sure that the work stop does not
interfere with the downward movement of the blade.
Fig. C
1
NOTE: the locking handle is spring-
loaded and can be re-positioned as need
be. To re-position the handle, pull it
outwards, turn it to the desired position,
and release it.
88
ADJUSTMENTS
This band saw cuts miter angles anywhere from 0 to 60 de-
grees. To make an adjustment to the cutting angle:
1. Loosen the angle lock handle (Fig. D - 1).
2. Turn the swivel support (Fig. D - 2) until the mark on the
support matches the desired angle on the scale.
3. Tighten the miter locking handle.
NOTE: your saw has 2 positive stops for quick adjustment.
To adjust the position of the positive stops, loosen the sock-
et head cap screw with a 5mm hex wrench, re-position the
stop, and tighten the screw.
Fig. D
1
2
Fig. E
The blade guide must be adjusted before every cut on a workpiece. With-
out proper adjustment, the resulting cut may be unclean or jagged.
1. Loosen the blade guide locking handle (Fig. E - 1).
2. Slide the blade guide to move it closer to the workpiece. Position the
guide bearings as close to the workpiece as possible without interfering
with the cut. Tighten the blade guide locking handle.
1
The cutting speed depends on the material being cut. Generally, use a lower speed for ferrous metals or
thicker workpieces, and a higher speed for non-ferrous metals or thinner workpieces. To adjust the speed,
turn the control knob (Fig. F - 1). The speed ranges from 125 to 260 FPM.
For common steel, use a speed between 125 and 180 FPM (settings 1 to 3).
For aluminum or alloy, use the maximum speed of 260 FPM (setting 6).
For pipes, use a speed between 220 and 260 FPM (settings 4 to 6).
1
Fig. F
When setting up your saw for the first time or after installing
a new blade, check to ensure that the stationary blade guide
assembly is properly adjusted.
1. Using a hex wrench, loosen the 2 socket head cap screws
(parts 3975-109 and 3975-110).
2. Adjust the position of the stationary blade guide assembly
so that its side lays flush with the body of the saw.
3. Tighten the screws.
9
1. Pull out the pin (Fig. G - 1) from the hole in the saw’s body and tilt the
saw to its upper position. Set the blade stop to the desired position (Fig. H
- 2).
NOTE: never adjust the blade stop bolt so that the blade interferes with
any part of the saw. Always check to be sure that the blade will not cut any
part of the saw.
2. Use the vise to secure the workpiece in place (Fig. H - 1). Adjust the cut-
ting speed to the desired rate.
3. Push the green button to turn on the power of the saw (Fig. I - 1). The
power indicator light will turn on, but the blade will not start running yet.
Push the run button (Fig. J – 1) to start the blade running
4. Once the saw blade has come to full speed, gradually lower the ma-
chine’s body downwards until the blade comes into light contact with the
workpiece. Let the saw blade make a small groove along the workpiece to
help ensure a straight cut (particularly with curved or round workpieces).
5. Once initial contact and a groove have been made, apply a small amount
of additional pressure to continue the cut.
OPERATION
1
Fig. G Fig. H
Fig. I
Fig. J
1
1
1
NOTE: For optimal performance, cutting should only occur for 40% of the overall run
time. For example, for every 10 minutes the machine is running, only four of those min-
utes should be under load in order to maximize the performance of the machine
2
WARNING: when cutting magnesium, if using cutting oils, NEVER use water-soluble
cutting oils or emulsions (oil-water mix). The water will greatly intensify any accidental
magnesium chip fire and cause danger.
10
MAINTENANCE
WARNING: Band saw blades are extremely sharp! Always wear gloves
when handling saw blades. Replace the band saw blade when it becomes
dull. A sharp blade gives the best cuts and helps extend the life of your
machine. Replacement blades (model no. 3975-056 and BB5650) can
be purchased from wenproducts.com.
1. Remove the blade cover by unscrewing the six screws shown in Fig. K.
2. Relieve the blade tension by turning the blade tension adjustment
knob counterclockwise (Fig. L - 1).
3. Carefully remove the blade, first from between the guide bearings and
then from around the wheels.
4. Insert the new blade, first between the guide bearings and then around
the wheels.
NOTE: install the blade so that the teeth point in the direction of the
saw’s rotation.
5. Turn the blade tension adjustment knob until the blade is taut. The
blade is properly tensioned when pressing lightly on the side of the blade
moves the blade about 1/8 in. (Fig. L - 1).
6. Replace the blade cover and install the six screws (Fig. K).
7. Run the saw at no-load for 10 – 20 seconds to allow the blade to seat on the wheels.
8. Adjust the blade guide in preparation for the next cut.
Fig. K
Fig. L
1
Turn off the machine and disconnect the power supply
before conducting any maintenance work or adjusting any settings.
1. Routinely check the condition of the power supply cords and replace them if they are broken, worn or if inter-
nal wires are showing.
2. Use a brush to remove chips and other debris from the machine. Wipe off any cutting oil or other
processing residue from the blade, guide bearings, vise, and rest of the saw whenever necessary, and
especially before storing the saw.
TIP: apply a light coat of good-quality paste wax to the ways of the vise to protect it against damage and
rust, and to allow the movable jaw to slide more easily.
3. Keep the vise ways clean. Allowing chips to get under the movable vise jaw can cause damage to the
vise.
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