JET JWSS-18B Operating Instructions and Parts Manual

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Operating Instructions and Parts Manual

18-inch Woodworking Scroll Saw

Model JWSS-18B

JET

1.0 IMPORTANT SAFETY

INSTRUCTIONS

WARNING – To reduce risk of injury:

1. Read and understand the entire owner's manual before attempting assembly or operation.

2. Read and understand the warnings posted on the machine and in this manual. Failure to comply with all of these warnings may cause serious injury.

3. Replace warning labels if they become obscured or removed.

4. This scroll saw is designed and intended for use by properly trained and experienced personnel only. If you are not familiar with the proper and safe operation of a scroll saw, do not use until proper training and knowledge have been obtained.

5. Do not use this scroll saw for other than its intended use. If used for other purposes, JET disclaims any real or implied warranty and holds itself harmless from any injury that may result from that use.

6. Always wear ANSI Z87.1 approved safety glasses or face shield while using this machine. (Everyday eyeglasses only have impact resistant lenses; they are not safety glasses.)

7. Before operating this scroll saw, remove tie, rings, watches and other jewelry, and roll sleeves up past the elbows. Do not wear loose clothing. Confine long hair. Non-slip footwear or anti-skid floor strips are recommended. Do not wear gloves.

8. Wear ear protectors (plugs or muffs) if noise exceeds safe levels.

9. Do not operate this machine while tired or under the influence of drugs, alcohol or any medication.

10. Make certain the switch is in the OFF position before connecting the machine to the power supply.

11. Make certain the machine is properly grounded.

12. Make all machine adjustments or maintenance with the machine unplugged from the power source.

13. Remove adjusting keys and wrenches. Form a habit of checking to see that keys and adjusting wrenches are removed from the machine before turning it on.

14. Keep safety guards in place at all times when the machine is in use. If removed for maintenance purposes, use extreme caution and replace the guards immediately after completion of maintenance.

15. Check damaged parts. Before further use of the machine, a guard or other part that is damaged should be carefully checked to determine that it will operate properly and perform its intended function. Check for alignment of moving parts, binding of moving parts, breakage of parts, mounting and any other conditions that may affect its operation. A guard or other part that is damaged should be properly repaired or replaced.

16. Provide for adequate space surrounding work area and non-glare, overhead lighting.

17. Keep the floor around the machine clean and free of scrap material, oil and grease.

18. Keep visitors a safe distance from the work area. Keep children away.

19. Make your workshop child proof with padlocks, master switches or by removing starter keys.

20. Give your work undivided attention. Looking around, carrying on a conversation and “horseplay” are careless acts that can result in serious injury.

21. Maintain a balanced stance at all times so that you do not fall into the blade or other moving parts. Do not overreach or use excessive force to perform any machine operation.

22. Use the right tool at the correct speed and feed rate. Do not force a tool or attachment to do a job for which it was not designed. The right tool will do the job better and more safely.

23. Use recommended accessories; improper accessories may be hazardous.

24. Maintain tools with care. Keep saw blades sharp and clean for the best and safest performance. Follow instructions for lubricating and changing accessories.

25. Turn off the machine before cleaning. Use a brush or compressed air to remove chips or debris — do not use bare hands.

26. Do not stand on the machine. Serious injury could occur if the machine tips over.

27. Never leave the machine running unattended. Turn the power off and do not leave the machine until it comes to a complete stop.

28. Remove loose items and unnecessary work pieces from the area before starting the machine.

29. Keep hands and fingers away from moving saw blade.

30. Don’t use in dangerous environment. Don’t use power tools in damp or wet location, or expose them to rain. Keep work area well lighted.

Additional safety instructions for scroll saws

31. Scroll saw must be secured to a sturdy foundation. If there is a tendency for the stand or workbench to move, it must also be secured to the floor.

32. Blade must be properly tensioned before operating. Failure to do so could result in blade breakage and possible injury.

33. Never start saw with workpiece contacting blade.

34. Always keep fingers and hands away from blade. Avoid awkward hand positions where a sudden slip might cause hand to move into or toward the blade.

35. Always hold stock firmly against table. The provided hold-down should be correctly positioned over the workpiece.

36. Do not attempt to saw any stock that does not have a flat surface, without a suitable support. Do not cut pieces of material too small to hold by hand.

37. Care must be taken when cutting material with an irregular cross section. The blade could pinch before the cut is completed. Any stock, such as frame molding, must lie flat on the table surface and not be allowed to rock.

38. Dowels or tubing have a tendency to roll while being cut and cause the blade to “bite.” Round material should be held firmly against the table.

39. Turn off saw before backing stock out of an incomplete cut. Only remove jammed cut-off pieces after blade has stopped.

40. Make “relief” cuts before cutting long curves.

41. When cutting large or oversize stock, always make sure material is supported at table height.

42. Do not feed workpiece too fast while cutting. Feed workpiece only fast enough for the blade to cut.

43. Never reach under the table while blade is moving.

WARNING: This product can expose you to chemicals including lead and cadmium which are known to the State of California to cause cancer and birth defects or other reproductive harm, and phthalates which are known to the State of California to cause birth defects or other reproductive harm. For more information go to http://www.p65warnings.ca.gov.

WARNING: Drilling, sawing, sanding or machining wood products generates wood dust and other substances known to the State of California to cause cancer. Avoid inhaling dust generated from wood products or use a dust mask or other safeguards for personal protection.

Wood products emit chemicals known to the State of California to cause birth defects or other reproductive harm. For more information go to http://www.p65warnings.ca.gov/wood.

Familiarize yourself with the following safety notices used in this manual:

This means that if precautions are not heeded, it may result in minor injury and/or possible

machine damage.

This means that if precautions are not heeded, it may result in serious, or possibly even fatal,

injury.

SAVE THESE INSTRUCTIONS

1.2 Switch lock-out

To safeguard your machine from unauthorized operation and accidental starting by young children, the use of a padlock (not included) is highly recommended. See Figure 1. Place the key in a location that is inaccessible to children and others not qualified to use the tool.

Figure 1

2.0 About this manual

This manual is provided by JET, covering the safe operation and maintenance procedures for a JET Model JWSS-18B Scroll Saw. This manual contains instructions on installation, safety precautions, general operating procedures, maintenance instructions and parts breakdown. Your machine has been designed and constructed to provide consistent, long-term operation if used in accordance with the instructions as set forth in this document.

This manual is not intended to be an exhaustive guide to scroll saw operational methods, choice of blades or wood stock, etc. Additional knowledge can be obtained from experienced users or trade articles. Whatever accepted methods are used, always make personal safety a priority.

If there are questions or comments, please contact your local supplier or JET. JET can also be reached at our web site: www.jettools.com.

Retain this manual for future reference. If the machine transfers ownership, the manual should accompany it.

Read and understand the entire contents of this manual before attempting assembly or

operation! Failure to comply may cause serious injury!

Register your product using the mail-in card provided, or register online: http://www.jettools.com/us/en/service-and-support/product-registration/

3.0 Table of contents

Section Page

1.0 IMPORTANT SAFETY INSTRUCTIONS ....................................................................................................... 2

1.2 Switch lock-out ........................................................................................................................................... 4

2.0 About this manual .......................................................................................................................................... 4

3.0 Table of contents ............................................................................................................................................ 5

4.0 Glossary ......................................................................................................................................................... 6

5.0 Specifications ................................................................................................................................................. 7

5.1 Mounting hole pattern ................................................................................................................................. 8

6.0 General features and terminology .................................................................................................................. 8

7.0 Setup and assembly ....................................................................................................................................... 9

7.1 Shipping contents ....................................................................................................................................... 9

7.2 Tools required for assembly ....................................................................................................................... 9

7.3 Unpacking and cleanup .............................................................................................................................. 9

7.4 Transporting saw ........................................................................................................................................ 9

7.5 Mounting to bench or stand ...................................................................................................................... 10

7.6 Installing optional accessories .................................................................................................................. 10

7.7 Dust collection .......................................................................................................................................... 11

8.0 Electrical connections .................................................................................................................................. 11

8.1 GROUNDING INSTRUCTIONS ............................................................................................................... 11

8.2 Extension cords ........................................................................................................................................ 11

9.0 Adjustments ................................................................................................................................................. 12

9.1 Arm tilt ...................................................................................................................................................... 12

9.2 Installing blade ......................................................................................................................................... 12

9.3 Adjusting blade tension ............................................................................................................................ 13

9.4 Material hold-down ................................................................................................................................... 13

9.5 Speed control ........................................................................................................................................... 13

9.6 Squaring blade to table ............................................................................................................................ 13

9.7 Adjusting blade oscillation ........................................................................................................................ 14

9.8 Arm lift retention ....................................................................................................................................... 15

9.9 Blower nozzle ........................................................................................................................................... 15

10.0 Operations .................................................................................................................................................. 15

10.1 General operating tips ............................................................................................................................ 15

10.2 On/off controls ........................................................................................................................................ 15

10.3 Procedure ............................................................................................................................................... 15

11.0 User-maintenance ...................................................................................................................................... 16

11.1 General maintenance ............................................................................................................................. 16

11.2 Lubrication .............................................................................................................................................. 16

11.3 Fuse inspection ...................................................................................................................................... 17

11.4 Commutator brush inspection ................................................................................................................ 17

12.0 Blade selection ........................................................................................................................................... 18

12.1 Width ...................................................................................................................................................... 18

12.2 Pitch ....................................................................................................................................................... 18

12.3 Set .......................................................................................................................................................... 18

12.4 Material ................................................................................................................................................... 18

12.5 Tooth form .............................................................................................................................................. 19

13.0 Optional accessories .................................................................................................................................. 19

14.0 Troubleshooting JWSS-18B Scroll Saw ..................................................................................................... 20

15.0 Replacement parts ..................................................................................................................................... 21

15.1.1 JWSS-18B Upper & Lower Arm Assembly – Exploded View .............................................................. 22

15.1.2 JWSS-18B Upper & Lower Arm Assembly – Parts List ....................................................................... 23

15.2.1 JWSS-18B Table & Cabinet Assembly – Exploded View .................................................................... 2 4 

15.2.2 JWSS-18B Table & Cabinet Assembly – Parts List ............................................................................ 25

15.3.1 JWSS-18B Drive Link Assembly – Exploded View ............................................................................. 26

15.3.2 JWSS-18B Drive Link Assembly – Parts List ...................................................................................... 27

15.4.1 Stand (OPTIONAL) for JWSS-18B Scroll Saw – Exploded View ........................................................ 29

15.4.2 Stand (OPTIONAL) for JWSS-18B Scroll Saw – Parts List ................................................................. 29

16.0 Electrical connections – JWSS-18B Scroll Saw ......................................................................................... 30

17.0 Warranty and service ................................................................................................................................. 31

4.0 Glossary

Some terms relevant to the scroll saw:

Beam strength: A blade’s resistance to backward deflection caused by pressure of the workpiece.

Bevel edge cut: Tilt of blade between 0° and 45° to perform angled cutting operation.

Blade drift: Deviation of blade from a straight line. The smaller the blade, the more prone to drifting.

Blade tracking: How the blade moves through the cutting path.

Contour cut: Cutting outside the workpiece line.

Crosscut: A cut made across the grain of a

workpiece.

Deflection: Tendency of blade to be pushed backward or sideways under pressure from the workpiece.

Feed rate: Linear travel of workpiece into blade.

Freehand: Moving the workpiece into the blade

using only the hands, without a fixed positioning device.

Fret work: Cutting inside the workpiece; also called open work, or pierce cutting.

Kerf: The resulting cut or gap made by the blade.

Kickback, or Lift: The tendency of workpiece to

rise off the table due to being caught by the blade.

Leading edge: Edge of workpiece that first gets pushed into blade.

Parallel: Position of saw arm equal in distance at every point to the table surface.

Parallel link: style of scroll saw in which a motor pushes rods in upper and lower arms that move articulated arms holding the blade. (The JET scroll saw is this type.)

Perpendicular: 90° (right angle) intersection or position of vertical and horizontal planes, such as saw blade to table.

Pin-end blade: Blade that requires a pin to secure it to the saw. (These are not suitable for intricate fretwork.)

Plain-end blade: Blade that slides into a clamp without need of a pin holder. These are preferred for delicate fretwork. (The JET scroll saw uses this type.)

Rake angle: Angle of a blade tooth in respect to a line perpendicular to the back edge of blade.

Relief cut: Extra cut to remove waste material and prevent the blade from binding when cutting a curve.

Rip Cut: A cut made along the grain of the workpiece.

Scroller: User of a scroll saw. Sometimes called “scroll-sawyer” or “scroll-sawer”.

Scroll work: General term for designs with spirals and rolling curves.

Stack cutting: Placing multiple workpieces together for simultaneous cutting. (CAUTION: Pieces must be properly taped or glued together to prevent sliding.)

Throat capacity: Distance from blade to body column; identifies maximum workpiece size.

Trailing edge: Edge of workpiece that last contacts blade.

5.0 Specifications

Table 1

Model number JWSS-18B

Stock numbers

Scroll saw only 727300B Scroll saw with stand 727300K Stand only 727300S

Motor and electricals

Motor type brushed DC Horsepower 1/16 HP (50W) Motor phase single Motor voltage 120 V Cycle 60 Hz Listed FLA (full load amps) 1.3 A Starting current 2 A Running current (no load) 0.5 A On/off switch rocker style Power cord 18 AWG, 6 ft. (183 cm) Power plug installed 15 A Foot pedal cord (optional) 18 AWG, 7.2 ft. (220 cm) Recommended circuit and fuse/breaker size 1 5-15P, 15A Overload fuse 3.15A, 250V

Blade and capacities

Stroke 3/4 in. (18.6 mm) Speed variable, 400 to 1550 stroke/min. Throat capacity 18-1/2 in. (470 mm) Blade type used plain-end (pinless) 5 in. Blades included (5) reverse skip tooth Maximum cutting depth 2 in. (51 mm) Arm tilt 45 deg. right; 30 deg. left (45 deg. with removal of dust port)

Main materials

Body steel Main table steel Trunnion steel Arm steel, plastic cover

Dimensions

Optional stand footprint (LxW) 28 x 25-1/2 in. (711 x 648 mm) Overall dimensions – saw only (LxWxH) 30.7 x 15.7 x 17.3 in. (780 x 400 x 440 mm) Overall dimensions – saw on stand (LxWxH) 33 x 25-1/2 x 48 in. (838 x 648 x 1219 mm) Shipping dimensions – saw only 33.2” x 18.9 x 19" (845mm x 480mm x 485mm)

Dust collection

Dust port diameter inside 2.28 in. (58mm); outside 2.5 in. (63mm) Recommended dust extraction volume 300–350 CFM (8.5–10 CMM)

Weights

Net weight, saw only 54 lbs ( 24.5 kg) Shipping weight, saw only 62.5 lbs ( 28.5 kg) Net weight, optional stand only 21.5 lbs (9.8 kg)

subject to local/national electrical codes.

L = length; W = width; H = height CFM=cubic feet per minute

Specifications in this manual were current at time of publication, but because of our policy of continuous improvement, JET reserves the right to change specifications at any time and without prior notice, without incurring obligations.

5.1 Mounting hole pattern

Figure 5-1: JWSS-18B mounting hole pattern

6.0 General features and terminology

Figure 6-1: JWSS-18B features

7.0 Setup and assembly

Read and understand all

assembly instructions before attempting assembly. Saw must remain unplugged from power source during assembly procedures.

7.1 Shipping contents

Refer to Figure 7-1.

1 Scroll saw (not shown) 4 Leveling feet with hex nuts 4 Rubber washers – (HP5) 3 Lower blade holders (one installed) 5 Blades, reverse skip tooth (one installed) 1 Operator’s manual (not shown) 1 Product registration card (not shown)

Figure 7-1: contents (not to scale)

Stand (Optional Accessory)

Refer to Figure 7-7, or sect. 15.4.1.

2 Short top braces – (#3) 2 Long top braces – (#4) 2 Short bottom braces – (#7) 2 Long bottom braces – (#8) 4 Legs – (#5) 4 Leg extensions – (#10) 1 Hardware package (see Figure 7-2); contains:

4 Hex cap screws 5/16x1 – (HP1) 24 Carriage bolts 5/16x1/2 – (HP2) 32 Flat washers 5/16 – (HP3) 28 Hex nuts 5/16 – (HP4)

Figure 7-2: hardware package JWSS22B-SHK

7.3 Unpacking and cleanup

1. Remove all contents from shipping carton. Remove protective coating from the table using a soft cloth moistened with a solvent. (Do not use acetone, gasoline or lacquer thinner for this purpose, as these will damage painted and plastic parts.)

2. Inspect contents for shipping damage or missing parts. Report any damage or part shortages to your distributor. (Note: Check saw for any pre-installed parts before reporting part shortage.)

7.4 Transporting saw

Do NOT lift scroll saw beneath

arm (Figure 7-3) which may result in damage to linkage system. Always lift using motor and edge of table (Figure 7-4).

Figure 7-3: INCORRECT lifting

7.2 Tools required for assembly

14mm open-end wrench (for foot pads) 3mm hex wrench (for blade guide)

7.2.1 Tools required for optional

accessories

12mm wrench (for optional stand) #2 Cross-point screwdriver (for optional blade rack)

Note: Additional tools may be needed for adjustments and general maintenance.

Figure 7-4: correct lifting

7.5 Mounting to bench or stand

The scroll saw should be

installed upon a sturdy, flat surface with all four legs contacting the surface. Do NOT install with saw partially hanging over edge of table or workbench.

If scroll saw will not be bolted down to a surface, install the four foot pads to reduce vibration. See Figure 7-5. Lower hex nut may be adjusted for height. Tighten top hex nut down against saw foot.

Figure 7-5: leveling foot

The preferred method is to mount the saw directly to a solid workbench or table, or to the optional JET stand. If mounting to a workbench, use the provided rubber washers as a pad between saw and bench to minimize vibration. See Figure 7-6.

2. The leg extensions (#10, Figure 7-7) can be adjusted for height.

3. If stand will not be bolted to the floor, install the leveling feet (shown in Figure 7-5) that were included with the scroll saw, onto the bottoms of the stand leg extensions (Figure 7-7).

4. Position stand upright on level floor. Push down on stand assembly to settle it on floor, then fully tighten all fasteners with 12mm wrench.

5. Some scrollers prefer to tilt the saw toward them for convenience. If this is desired, adjust only the two front leg extensions.

6. Mount scroll saw to stand, using fasteners shown (also identified in Figure 7-2).

Figure 7-6: bench mounting (fasteners not

included)

If a non-permanent method is preferred, an alternative is to fasten the saw to a thick (minimum 3/4-inch) plywood board, then attach the board to a table using clamps.

7.6 Installing optional accessories

7.6.1 Stand (optional)

1. Assemble stand pieces, referring to Figure 7-7. (Refer to exploded view, sect. 15.4.1, if further clarification is needed.) Only finger-tighten all fasteners at this time.

NOTE: One end of each leg (#5) forms a slight “V” shape – this end goes at the top. The bottom edge of the leg forms a straight line.

Figure 7-7: stand assembly (optional accessory)

7.6.2 Blade storage (optional)

The optional blade rack (not provided) can be mounted to a wall, workbench or other surface. See Figure 7-8. It contains holes for storage of blades inside “test tubes” (not provided). Additionally, there are four slots for blade holder assemblies, and an end hole to assist in installing blades into holders.

Figure 7-8: blade storage (optional accessory)

7.6.3 Foot pedal (optional)

Connect plug from scroll saw into receptacle on back of foot pedal. Then plug foot pedal into power source. (If not using foot pedal, plug saw directly into power source; the on/off switch is then pressed to start and stop the saw.)

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