5-INCH PORTABLE

METAL BAND SAW

Model # 3975

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IMPORTANT:

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.

NEED HELP? CONTACT US!

Have product questions? Need technical support?

Please feel free to contact us at:

800-232-1195

(M-F 8AM-5PM CST)

[email protected]

WENPRODUCTS.COM

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TABLE OF CONTENTS

Technical Data

General Safety Rules

Specific Safety Rules For Band Saw

Electrical Information

Know Your Band Saw

Assembly

Adjustments

Operation

Maintenance

Troubleshooting

Exploded View & Parts List

Warranty

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TECHNICAL DATA

Model Number:

Motor:

Saw Blade:

Cutting Capacity for Square Material:

Cutting Capacity for Circular Material:

3975

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°)

Cutting Angle Adjustment:

Blade Speed:

Weight:

0 to 60°

125 to 260 FPM

45 pounds

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 operating 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 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.

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GENERAL SAFETY RULES

15. DO NOT OVERREACH. Keep proper footing and balance at all times. Wear oil-resistant rubber-soled footwear. Keep the floor clear of oil, scrap, and other debris.

16. MAINTAIN TOOLS PROPERLY. ALWAYS keep tools clean and in good working order. Follow instructions 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 starter 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 environment. Use ear protection such as plugs or muffs during extended periods of operation.

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SPECIFIC RULES FOR BAND SAW

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 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.

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.

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 conductor 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 completely 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 replace a damaged or worn cord immediately.

FIGURE A

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.

AMPERAGE

4.5 A

25 ft.

REQUIRED GAUGE FOR EXTENSION CORDS

50 ft.

100 ft.

18 gauge 16 gauge 14 gauge

150 ft.

14 gauge

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.

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A

C

B

J

KNOW YOUR BAND SAW

I

H

F

G

E

J

I

E

F

G

H

A

B

C

D

Blade Tension Adjustment Knob

Run Switch

Vise Adjustment

Rubber Feet

Work Stop

Angle Adjustment Lock

Locking Pin

Variable Speed Adjustment Knob

Power Switch

Blade Guide Lock

D

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 damaged part is replaced.

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TABLE OF LOOSE PARTS

1. Metal Band Saw

2. Work Stop with Lock Handle

3. Feet (4)

4. Guide Rail with Hex Nut

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4

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ASSEMBLY

ASSEMBLY AND INSTALLATION

1. Attach the four feet (Fig. B - 1) along each respective corner of the base.

2. Place the machine onto a work bench and secure it in place by using the three holes provided in the base (Fig. A).

3. Screw the guide rail to the threaded hole on the vise base.

Tighten the nut to fix it.

4. Attach the work stop (Fig. B - 2) to the guide rail (Fig. B - 3).

Secure it in place by tightening the lock handle.

Fig. A

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ADJUSTMENTS

POSITIONING THE WORK STOP

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.

WARNING: Make sure that the work stop does not interfere with the downward movement of the blade.

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Fig. B

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Fig. C

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ADJUSTMENTS

CUTTING ANGLE ADJUSTMENT

This band saw cuts angles anywhere from 0 to 60 degrees.

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. Lock the angle lock handle.

SLIDING BLADE GUIDE

The sliding blade guide must be adjusted before every cut to a new workpiece. Without the adjustment, the resulting cut could be unclean and jagged.

1. Loosen the blade guide lock handle (Fig. E - 1).

2. Slide the blade guide to move it closer to the workpiece.

3. Retighten the blade guide lock handle.

Fig. E

CUTTING SPEED

The cutting speed always depends on the material being cut. To select the most suitable speed, turn the control knob (Fig. F - 1) to increase or decrease the speed, with 125 FPM as the lowest setting and 260

FPM the highest.

For common steel, use a speed between 125 and 180 FPM.

For aluminum or alloy, use the maximum speed of 260 FPM.

For pipes, use a speed between 220 and 260 FPM.

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Fig. D

Fig. F

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OPERATION

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Fig. I

Fig. J

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Fig. G Fig. H

1. Pull out the pin (Fig. G - 1) from the hole in the saw’s body and tilt the saw to its upper position.

2. Use the vise to secure the workpiece in place (Fig. H - 1). Adjust the cutting speed to the desired rate.

3. Push the green button to turn on the power of the saw (Fig. I - 1). The blade will not start running until the run button is also activated. Using the index finger of your right hand, press the run button after turning on the saw’s power (Fig. J - 1).

4. Once the saw blade has come to full speed, gradually lower the machine’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.

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 minutes should be under load in order to maximize the performance of the machine

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MAINTENANCE

WARNING: Turn off the machine and disconnect the power supply before conducting any maintenance work or adjusting any settings.

CHANGING THE SAW BLADE

1. Remove the protective casing by unscrewing the six screws shown in

Fig. K.

2. Loosen the blade tension by turning the blade tension adjustment knob counterclockwise (Fig. L - 1).

3. Carefully remove the blade, first from the guides and then from around the cast iron pulleys.

4. Insert the new blade, first between the guides and then around the cast iron pulleys.

5. Turn the blade tension adjustment knob to properly adjust the blade tension (Fig. L - 1).

6. Replace the protective casing using the six screws in Fig. K.

Fig. K

7. Reposition the blade guides into their correct position for the next cut.

GENERAL MACHINE CARE

• Routinely check the condition of the power supply cords and replace them if they are broken, worn or if internal wires are showing.

Fig. L

• Use a brush and a shop vacuum to remove chips and other debris from the machine.

• Always keep the machine hand grip clean to prevent accidental slipping during use.

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• Remove the processing residues from the cutting area and the blade guides whenever necessary.

• If you do not intend to use the sawing machine for a long time, clean it and put it in a dry place if possible. In these cases, it is advisable to make sure the blade stays slack so that it is not kept under tension during storage for any reason.

• To ensure effective machine operation, check the condition of the blade daily. Sharpen it as necessary.

TROUBLESHOOTING

PROBLEM

The motor does not work.

Overload circuit tripped

CAUSE

1. Defective motor, power cable or plug.

2. Safety cover is open; interlock switch does not work.

1. Motor overload caused by excessive cutting pressure.

2. Motor breakdown.

Inaccurate cut squaring

The blade tends to protrude from the guide.

1. Excessive cutting pressure.

2. Incorrect blade tooth in relation to the workpiece.

3. Incorrect adjustment of the sliding blade guide.

4. Incorrect cutting speed in relation to work piece.

5. The workpiece is wrongly positioned in the vise.

6. Poor blade tension.

1. Excessive blade tension.

2. Incorrect eccentric blade guide adjustment.

3. The blade slips on the pulleys, due to the oil or grease required for cutting operations.

SOLUTION

1. Specialized personnel should check the machine.

2. Close the safety cover.

1. Perform the cut on the piece at the correct pressure.

2. Specialized personnel should check the machine.

1. Decrease the cutting pressure.

2. Choose the proper blade for the given workpiece.

3. Check the blade guide adjustment.

4. Adjust to the correct cutting speed.

5. Check workpiece positioning and clamping in the vise.

6. Check the blade tension.

1. Check blade tension.

2. Check eccentric blade guide adjustment.

3. Never use any type of lubricant or coolant for the cutting operations; specialized personnel should check and replace the pulleys if necessary.

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EXPLODED VIEW AND PARTS LIST

EXPLODED VIEW AND PARTS LIST

No.

Part Description

1 3975-001 Speed adjusting knob

2 3975-002 Circuit breaker

3 3975-003 Motor housing

6

7

8

9

3975-006 Pan head screw

3975-008 Serrated washer

3975-009 Motor assembly

10 3975-010 Socket head screw

11 3975-011 O ring

12 3975-012 Strain relief

13 3975-013 Switch

Qty.

1

1

1

4 3975-004 Thread forming screw 2

5 3975-005 Motor driver 1

3

3975-007 Pan head screw

15 3975-015 Switch box

16 3975-016 Indicator light

17 3975-017 Flat washer 2

18 3975-018 Thread forming screw 2

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1

19 3975-019 Power cord

20 3975-020 Inner line

21 3975-021 Front wheel shaft

22 3975-022 Key

1

4

1

1

4

1

1

14 3975-014 Thread forming screw 2

23 3975-023 Retaining ring

24 3975-024 50T Gear

25 3975-025 Ball bearing

26 3975-026 Retaining ring

27 3975-027 Oil seal

28 3975-028 Ball bearing

29 3975-029 Retaining ring

30 3975-030 43T Gear

31 3975-031 Key

32 3975-032 Pinion gear

33 3975-033 Spring pin

34 3975-034 Socket head screw

35 3975-035 Lock washer

36 3975-036 Gear box

37 3975-037 Frame cover

38 3975-038 Pan head screw

39 3975-039 Flat washer

40 3975-040 Left handle part

41 3975-041 Button

42 3975-042 Spring

43 3975-043 Operating switch

44 3975-044 Cord clamp

45 3975-045 Pan head screw

46 3975-046 Right handle part

47 3975-047 Thread forming screw 3

48 3975-048 Flat head screw 4

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1

6

1

1

6

4

1

5

1

1

5

1

4

1

1

1

1

1

2

2

2

1

1

1

1

1

1

No.

Part

49 3975-049 Tube

Description

50 3975-050 Guide plate

51 3975-051 Socket head screw

52 3975-052 Socket head screw

53 3975-053 Lock washer

54 3975-054 Set screw

55 3975-055 Sliding block

56 3975-056 Blade

57 3975-057 Bevel plate

58 3975-058 Ball bearing

59 3975-059 Retaining ring

60 3975-060 Rear blade wheel

61 3975-061 Flat head screw

62 3975-062 Key

63 3975-063 Front blade wheel

64 3975-064 Flat washer

65 3975-065 Flat head screw

66 3975-066 Frame

67 3975-067 Spring washer

68 3975-068 Blade tension knob

69 3975-069 Cord clamp

70 3975-070 Pan head screw

71 3975-071 Set screw

72 3975-072 Lock handle

73 3975-073 Flat washer

74 3975-074 Nut

75 3975-075 Lock washer

76 3975-076 Flat washer

77 3975-077 Rear blade guide block

78 3975-078 Ball bearing

79 3975-079 Flat washer

80 3975-080 Pin

81 3975-081 Socket head screw

82 3975-082 Lock washer

83 3975-083 Blade guard

84 3975-084 Flat washer

85 3975-085 Ball bearing

86 3975-086 Shaft

87 3975-087 Flat washer

88 3975-088 Lock washer

89 3975-089 Socket head screw

90 3975-090 Socket head screw

91 3975-091 Flat washer

92 3975-092 Guard plate

93 3975-093 Pin

94 3975-094 Front blade guide block 1

95 3975-095 Nut

96 3975-096 Hex head bolt

1

1

4

2

4

8

1

1

1

1

1

1

1

1

2

2

2

4

4

1

4

4

1

1

2

1

1

2

1

8

1

1

1

1

1

1

2

1

1

1

1

1

2

2

Qty.

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2

4

No.

Part

97 3975-097 Nut

Description

98 3975-098 Center shaft

99 3975-099 Torsion spring

100 3975-100 Lock handle

101 3975-101 Flat washer

102 3975-102 Swivel support

103 3975-103 Flat washer

104 3975-104 Nut

105 3975-105 Hex head bolt

106 3975-106 Nut 1

107 3975-107 Socket head screw 1

1

1

108 3975-108 Flat washer 1

109 3975-109 Socket head screw 2

110 3975-110 End stop washer

111 3975-111 Bushing

1

1

1

1

Qty.

1

1

1

112 3975-112 Retaining ring

113 3975-113 Lock pin

114 3975-114 Pan head screw

115 3975-115 Angle scale

116 3975-116 Base

117 3975-117 Foot

118 3975-118 Carriage bolt

119 3975-119 Flat washer

120 3975-120 Nut

121 3975-121 Vise base

122 3975-122 Flat head screw

123 3975-123 Vise jaw

124 3975-124 Sliding case

125 3975-125 Retaining ring

126 3975-126 Screw

127 3975-127 Spring pin

128 3975-128 Bushing

129 3975-129 Handle cap

130 3975-130 Socket rod

131 3975-131 Handle rod

132 3975-132 Set screw

133 3975-133 Guide block

134 3975-134 Lock washer

135 3975-135 Hex head bolt

136 3975-136 Spring pin

137 3975-137 Lock washer

138 3975-138 Socket head screw 6

139 3975-139 Nut

140 3975-140 Work stop rod

141 3975-141 Work stop

142 3975-142 Lock handle

143 3975-143 Hex head bolt

1

1

1

1

1

1

1

1

1

1

2

1

1

2

6

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1

1

1

2

1

1

1

1

1

1

4

2

1

1

1

2

1

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LIMITED TWO YEAR WARRANTY

WEN Products is committed to build tools that are dependable for years. Our warranties are consistent with this commitment and our dedication to quality.

LIMITED WARRANTY OF WEN CONSUMER POWER TOOLS PRODUCTS FOR HOME USE

GREAT LAKES TECHNOLOGIES, LLC (“Seller”) warrants to the original purchaser only, that all WEN consumer power tools will be free from defects in material or workmanship for a period of two (2) years from date of purchase. Ninety days for all WEN products, if the tool is used for professional use.

SELLER’S SOLE OBLIGATION AND YOUR EXCLUSIVE REMEDY under this Limited Warranty and, to the extent permitted by law, any warranty or condition implied by law, shall be the repair or replacement of parts, without charge, which are defective in material or workmanship and which have not been misused, carelessly handled, or misrepaired by persons other than Seller or Authorized Service Center. To make a claim under this

Limited Warranty, you must make sure to keep a copy of your proof of purchase that clearly defines the Date of

Purchase (month and year) and the Place of Purchase. Place of purchase must be a direct vendor of Great Lakes

Technologies, LLC. Third party vendors such as garage sales, pawn shops, resale shops, or any other secondhand merchant void the warranty included with this product. Contact [email protected] or 1-800-232-

1195 to make arrangements for repairs and transportation.

When returning a product for warranty service, the shipping charges must be prepaid by the purchaser. The product must be shipped in its original container (or an equivalent), properly packed to withstand the hazards of shipment. The product must be fully insured with a copy of the warranty card and/or the proof of purchase enclosed.

There must also be a description of the problem in order to help our repairs department diagnose and fix the issue. Repairs will be made and the product will be returned and shipped back to the purchaser at no charge.

THIS LIMITED WARRANTY DOES NOT APPLY TO ACCESSORY ITEMS THAT WEAR OUT FROM

REGULAR USAGE OVER TIME INCLUDING BELTS, BRUSHES, BLADES, ETC.

ANY IMPLIED WARRANTIES SHALL BE LIMITED IN DURATION TO ONE (1) YEAR FROM DATE

OF PURCHASE. SOME STATES IN THE U.S., SOME CANADIAN PROVINCES DO NOT ALLOW

LIMITATIONS ON HOW LONG AN IMPLIED WARRANTY LASTS, SO THE ABOVE LIMITATION

MAY NOT APPLY TO YOU.

IN NO EVENT SHALL SELLER BE LIABLE FOR ANY INCIDENTAL OR CONSEQUENTIAL DAM-

AGES (INCLUDING BUT NOT LIMITED TO LIABILITY FOR LOSS OF PROFITS) ARISING FROM

THE SALE OR USE OF THIS PRODUCT. SOME STATES IN THE U.S. AND SOME CANADIAN

PROVINCES DO NOT ALLOW THE EXCLUSION OR LIMITATION OF INCIDENTAL OR CON-

SEQUENTIAL DAMAGES, SO THE ABOVE LIMITATION OR EXCLUSION MAY NOT APPLY TO

YOU.

THIS LIMITED WARRANTY GIVES YOU SPECIFIC LEGAL RIGHTS, AND YOU MAY ALSO HAVE

OTHER RIGHTS WHICH VARY FROM STATE TO STATE IN THE U.S., PROVINCE TO PROVINCE

IN CANADA AND FROM COUNTRY TO COUNTRY.

THIS LIMITED WARRANTY APPLIES ONLY TO PORTABLE ELECTRIC TOOLS, BENCH POW-

ER TOOLS, OUTDOOR POWER EQUIPMENT AND PNEUMATIC TOOLS SOLD WITHIN THE

UNITED STATES OF AMERICA, CANADA AND THE COMMONWEALTH OF PUERTO RICO. FOR

WARRANTY COVERAGE WITHIN OTHER COUNTRIES, CONTACT THE WEN CUSTOMER SUP-

PORT LINE.