Work Sharp WSKTS-KO Blade Grinding Attachment User Manual

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Tool Set Up:

Best Techniques:

Accessory List:




PP0003138 Rev 0 10/13

Choose either short or long center location for pulley
depending on preference.

Set the desired sharpening angle, set tensioner into lock
position, then move the Angle Adjustment Lever. Tighten
Angle Selection Clamp Knob to secure selected angle.

Be mindful that accommodations will need to be made for
every blade such as thumb studs, pocket clips, blade profile
or handle design. Test run the blade through the process on
both bevels without power first to ensure accommodations
can be made before sharpening.

WSKTS-KO Blade Grinding Belt Kit (1” x 18” belts): WSSAKO81115

Individual Extra Coarse P120 Grit Belt (1” x 18” belts): PP0002770

Individual Coarse X65 Grit Belt (1” x 18” belts): PP0002940

Individual Medium X22 Grit Belt (1” x 18” belts): PP0002942

Individual Fine X4 Grit Belt (1” x 18” belts): PP0002943

Individual Extra Fine 12,000 Grit Belt (1” x 18” belts): PP0002952

Leather Belt Kit (1” x 18” belts with .5µ compound): WSSA0002782

Knife not getting sharp?

More strokes - Grind all the way to the edge. Continue until a burr is

raised. Then progress to a finer belt.

Higher Speed - Slow belt speeds may not be removing enough material.

Coarser Belt - Coarser grit belts will remove material more aggressively.

a) Problem: The tips of my knives are becoming rounded.

Solution 1: Stop the tip on the belt.
Solution 2: Keep the blade edge perpendicular to the belt. To reduce tip
rounding, follow the curve of the blade.

c) Problem: How do I feel for a burr at the cutting edge to know when to

proceed to a finer belt?
Solution: Slide your finger perpendicular and away from the cutting edge.
The burr will feel like a small ‘ridge’ or ‘wire’ at the edge.
See image in the Sharpening Section, Step 3.

1-year warranty on all WORK SHARP® components;
excludes abrasives. Warranty for consumer not industrial use.

Do not over-tension belt or it may negatively affect belt tracking.
If Over-Tension Mark is visible, lower tension.



Choose and mount a belt based on the task at hand (see
Belt Information Section for details).

Ensure belt is properly tracking so it
is centered on the pulleys.


Turn on power at medium speed and press switch lock out


Repeat same number of strokes
on other side of blade.



Continue up the grit scale until desired sharpness is
achieved. Ensure tracking and tension is properly set
when you change belts.



Place spine of the blade flat onto reference plate. While
keeping blade flat, move up onto belt surface and place
the heel of the blade edge onto the abrasive.

Move blade flat across
abrasive (1” per
second) and stop the
tip on the middle of the
belt. Then pull blade
away from the belt.

Sharpen until a
burr is raised
before switching
to a finer grit belt.

Re-sharpening to
a lower angle
and a convex
grind takes time.

Continue sharpening the same side of the blade until a burr is
raised along entire edge (count strokes).

The tool is ready for use. Continue to Sharpening Section.

Use very light
pressure on belt
(1/16” deflection).



Use a clamp to secure to work bench.





During heavy grinding, do not over-heat the blade.

Sharpening Process:

Follow the curve of the knife when sharpening for best results.

Masking tape can protect blade from scratching during sharpening.

Use a practice knife to learn.

Short Center

Long Center

Lock Out Switch

Straight Blades
Flatter Grind

High Curve Blades
Convex Grind


Over-Tension Mark

Most knives
are flat
ground and
have a
bevel height
or surface

Follow the shape of the blade so the edge remains perpendicular to the belt.

Stop on belt.


In Process

Continue to Next Grit

Abrasive Bel




Abrasive Bel


Follow the curve of the knife when sharpening for best results.

Position belt at the very start of the edge with motor off.

Angle Selection

Clamp Knob