Wen 3970 Manuel utilisateur
Model # 3970
4˝ x 6˝ METAL BANDSAW
WITH STAND
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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:
800-232-1195
WENPRODUCTS.COM
(M-F 8AM-5PM CST)
TABLE OF CONTENTS
Technical Data 2
3
4
5
7
8
14
15
18
21
General Safety Rules
Specific Safety Rules For Band Saw
Electrical Information
Know Your Band Saw
Assembly and Adjustments
Maintenance
Exploded View & Parts List
Warranty
TECHNICAL DATA
3970
120 V, 60 Hz, 3/4 HP, 4.6A
64-1/2 x 1/2 in.
4 x 6 in. (90°)
3-1/2 x 3-1/2 (45°)
4-1/2 in. diameter (90°)
3-1/2 in. diameter (45°)
0 to 45°
80, 120, 180 FPM
L-CKE220
90 mL
109 pounds
2
Operation
Model Number:
Motor:
Saw Blade:
Cutting Capcity for Square Material:
Cutting Capacity for Circular Material:
Cutting Angle Adjustment:
Blade Speed:
Oil Type:
Oil Quantity:
Weight:
3
GENERAL SAFETY RULES
Safety is a combination of common sense, staying alert and knowing how your item works. SAVE THESE SAFE-
TY INSTRUCTIONS.
WARNING: 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.
WARNING: Dust generated from certain materials can be hazardous to your health. Always oper-
ate the tool in a well-ventilated area and provide for proper dust removal. Use dust collection sys-
tems 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 the floor before operating.
2. The machine must be switched off before inserting any material to be cut in the vise or before removing material
from the vice 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.
SPECIFIC RULES FOR BAND SAW
5
ELECTRICAL INFORMATION
GROUNDING INSTRUCTIONS
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.
4.6 A 18 gauge 16 gauge 14 gauge 14 gauge
6
KNOW YOUR BAND SAW
WARNING: For your own safety, read the instruction manual before operating the band saw.
1. Wear eye protection.
2. Do not wear gloves, a necktie, jewelry, or loose clothing.
3. Make sure the saw is on a firm, level surface and properly secured.
4. Use only the recommended accessories.
5. Use extra caution with very large, very small, or awkward workpieces.
6. Keep hands away from blade at all times to prevent accidental injury.
A
B
C
E
D
F
H
I
JK
L
A Blade Tension Adjustment Knob
B Feed Rate Adjustment Handle
C Vise Adjustment Handle
D Power Switch
E Blade Guard Adjustment Knob
F Belt House
G Motor
H Blade
I Blade Guard
J Uniform Length Stop
K Wheel
L Transport Handle
G
7
WARNING: For your own safety, read the instruction manual before operating the band saw.
1. Wear eye protection.
2. Do not wear gloves, a necktie, jewelry, or loose clothing.
3. Make sure the saw is on a firm, level surface and properly secured.
4. Use only the recommended accessories.
5. Use extra caution with very large, very small, or awkward workpieces.
6. Keep hands away from blade at all times to prevent accidental injury.
ASSEMBLY
UNPACKING
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 dam-
aged part is replaced.
Tools Required for Assembly & Adjustments
The tools listed below are not included but are required for either assembly or adjustment.
Two 14mm Open End Wrenches
Two 10mm Open End Wrenches
23
1456
78910 11 12
13 14 15 16 17
TABLE OF LOOSE PARTS
1. Band Saw (1)
2. Stand Legs A (2)
3. Stand Legs B (2)
4. Table (1)
5. Table Support (1)
6. Transport Handle (1)
7. Work Stop Rod (1)
8. Work Stop (1)
9. Belt House (1)
10. V-Belt (1)
11. Motor Pulley (1)
12. Work Gear Pulley (1)
13. Long Brace (2)
14. Short Brace (2)
15. Wheel Mounting Bracket (1)
16. Shaft (1)
17. Wheels (2)
18. Hardware Bag (not shown)
NOTE: Key is tied to motor
shaft.
88
TO ASSEMBLE THE STAND
1. With the help of an assistant, lift the bandsaw onto a suitable support (Fig.A).
2. Attach the legs to the bandsaw with the M8-1.25 x 25 hex bolts, 8mm flat washers, 8mm lock washers and the
M8-1.25 hex nuts. Hand tighten.
3. Attach the short brace to the legs with the M6-1.0x16 carriage bolts, 6mm flat washers, 6mm lock washers and
M6-1.0 hex nuts. Hand tighten.
4. Lift the bandsaw onto the floor. Attach the long brace to the legs with M6-1.0 x 16 carriage bolts, 6mm flat
washers, 6mm lock washers and M6-1.0 hex nuts (Fig. B). Hand tighten.
5. Use the M6-1 x 12 hex bolts, M6-1 hex nuts, 6mm lock washers and the 6mm to install the wheel mounting
brackets to the legs (Fig. C). Hand tighten.
6. Slide the shaft through the holes in the wheel mounting bracket. Slide the wheels onto the shaft on the outside
of the mounting bracket and secure them with the cotter pins (Fig. D).
ASSEMBLY
Fig. A Fig. B
Fig. C Fig. D
9
ASSEMBLY
TO ASSEMBLE THE STAND (CONT.)
7. Check to see if the bandsaw is relativly level, then the tighten all of the
nuts using the necessary wrenches.
8. Insert the handle into the pre-drilled holes on the legs opposite of the
wheels. Secure the handle in place with the cotter pin (Fig. E).
9. Remove the screws and washers from where the belt house needs to be
mounted. Place the belt house over the motor and gear shafts. Secure it
with the removed screws and washers (Fig. F & Fig. G).
10. Open the pulley cover. Take the key from off the motor shaft and
clean the motor shaft. Install the key and motor pulley to the motor shaft
(Fig. H).
11. Install the worm gear pulley on the shaft closest to the gear box, op-
posite of the motor (Fig. H). NOTE: Make sure to pay attention to the
direction of the pulley’s installation.
12. Use a straight edge to check the alignment of the pulley wheels and
adjust them as needed (Fig. H).
13. When the pulley wheels are aligned, tighten the set screws on both
pulleys and install the V belt. The belt tension can be adjusted by adjusting
the motor lock bolt (Fig. I - 1)
14. Install the work stop shaft (Fig. J - 1) into the side of the bandsaw. Lock
it into place by tightening the set screw (Fig. J - 2). Slide the work stop onto
the end of the shaft and lock it into position with the set screw (Fig. J - 3).
Fig. E
Fig. F
Fig. G
Fig. H Fig. I Fig. J
1
1
3
2
Fig. O
10
ADJUSTMENTS
VISE ADJUSTMENT
WARNING - Turn off the machine and disconnect from the power supply
before doing any adjustments.
To use the vise:
1. Loosen the two hex bolts (Fig. K - 1, L - 1).
2. Use the scale as a guide to set your angle (Fig. K - 2).
3. Tighten the hex bolts (Fig. K - 1, L - 1).
4. Loosen the hex bolt on the opposite jaw so the jaw can float. Match the
angle of the workpiece and retighten the hex bolt.
5. Tighten the vise against the workpiece.
1
2
1
Fig. K
Fig. L
BLADE GUIDE ADJUSTMENT
Loosen the knob (Fig. M - 1) and slide the blade guide (Fig. M - 2) as close
to the workpiece as possible, then re-tighten the knob.
FEED RATE ADJUSTMENT
The feed rate is controlled by the spring (Fig. N - 1) and handle (Fig. N -
2). Twist the handle clockwise to add tension to the spring and slow down
the feed rate. Twist the handle counterclockwise to remove the tension
from the spring.
1
2
Fig. M
1
2
Fig. N
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