Chef's Choice EdgeCraft DC 320, Instructions Manual

English — 5

In Stage 1, motor-driven, highly effective diamond abrasive disks remove the dull edge 

and create a sharp fully faceted edge at the conventional 20 degrees. In Stage 2 similar 

technology is used with finer diamond abrasives at a slightly larger angle to create a 

small second bevel along the edge. This two step sharpening and honing process leaves a 

stronger – arch shaped profile along the edge for greater strength and durability. In Stage 

3 the edge is further refined to create a razor sharp Trizor edge of increased perfection, 

sharpness and durability.
In Stage 1, 2 and 3 there are two knife-guiding slots. These are referred to as the left 

and right slots that sharpen alternately the right and left side of the blade’s edge. When 

sharpening, always follow an alternating pattern of sharpening in the right and left slots. 

This pattern insures that both sides (facets) of the edge are sharpened alike for better 

control of the cutting action of blade.
This three stage design provides the ultimate in versatility of the knife edge so that you 

can tailor the edge geometry to your cutting needs. You will find that the DC 320 gives 

you a very sharp edge and one that retains a significant bite for some of the more difficult 

cutting tasks. 

USING THE DC 320 SHARPENER

Note:

 Always clean your knife before sharpening in the sharpener! For your safety, keep 

your fingers clear of the blade edge at all times.

Try a practice pull through the sharpener with the power “OFF”. Slip the knife blade 

smoothly into the left slot between the left angle guide of Stage 1 or Stage 2. Do not twist 

the knife. Move the blade down in the slot until you feel it contact the diamond disk. Pull it 

towards you lifting the handle slightly as you approach the tip. This practice pull will give 

you a feel for the spring tension. Remove the knife and read the following instructions  

specific to the type of knife you will be sharpening.

STAGE 1

To sharpen, place the sharpener on the table gripping it securely with your hand. Push 

on the power switch. Insert the knife blade, (Figure 1) near its handle, into the far left slot 

of Stage #1 and allow the left face of the blade to rest on the left face of the slot as you 

pull the knife toward you. The knife edge should be in sustained moving contact with the 

rotating diamond abrasive coated disk. Only light downward force will be necessary as 

you pull the blade toward you. Listen carefully to insure your knife maintains good contact 

with the rotating diamond disk. Each pull should be at a speed of around one inch per 

second (6” blade=6 second pull).
Always pull the blade toward you. Never push the blade away from you. Make one pull of 

the blade in the left slot as described above and then repeat the same procedure in the 

adjacent (right) slot of Stage 1. As you pull the knife through the right slot, (see Figure 

2), hold the right face of the knife against the slanted right face of the slot. If your knife, 

before sharpening, is not very dull you will find that only about 5 pairs of pulls, alternating 

in the left and right slots of Stage 1, will be sufficient to create a burr on the blade. 

However, if the knife is initially very dull you may find that 10 or more alternating pairs of 

Figure 3. Develop a distinct burr along knife edge 

before sharpening in Stage 2 or 3. Burr can be 

detected by sliding finger across and away from  

the edge. Caution! See text.