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13
BLADE SELECTION (Fig. 12)
This scroll saw accepts 5” length pin end and pinless
blades, with a wide variety of blade thicknesses and
widths. The type of material and intricacies of cutting
operations will determine the number of teeth per
inch. Always select the narrowest blades for intricate
curve cutting and the widest blades for straight and
large curve cutting operations. The following table
represents suggestions for various materials. Use this
table as an example, but with practice, personal pref-
erence will be the best selection method.
When choosing a blade, use very fine, narrow blades
to scroll cut in thin wood 1/4” thick or less.
Use wider blades for thicker materials but this will
reduce the ability to cut tight curves. A smaller blade
width can cut circles with smaller diameters.
Note
: Thinner blades will have more possibilities for blade deflection when cutting angles are not perpendicular
to the table.
ASSEMBLY AND ADJUSTMENTS
BLADE CARE
To maximize the life of your scroll saw blades:
1. Do not bend blades when installing.
2. Always set proper blade tension.
3. Use the right blade (see instruction on replacement blade packaging for proper use).
4. Feed the work correctly into the blade.
5. Use thin blades for intricate cutting.
CAUTION
: Any and all servicing should be performed by a qualified service center.
TEETH PER
INCH
BLADE WIDTH
BLADE
THICKNESS
BLADE SPM
MATERIAL CUT
10 to 15
.11˝
.018˝
500 to 1200 SPM
Medium turns on
1/4˝ to 1-3/4˝ wood,
soft metal, hardwood
15 to 28
.055˝ to .11˝
.01 to .018˝
800 to 1700 SPM
Small turns on 1/8˝
to 1-1/2˝ wood, soft
metal, hardwood
30 to 48
.024˝ to .041˝
.012˝ to .019˝
Varies
Non-ferrous metals/
hardwoods using
very slow speeds
Summary of Contents for 3920
Page 8: ...8 KNOW YOUR SCROLL SAW ...
Page 20: ...20 EXPLODED VIEW PARTS LIST ...