Graver Sharpening

Why this matters more than people think

Most setters who plateau do it because their gravers aren't sharp enough. They've blamed their hands, their eyes, the metal, the stones, the bench, the lighting, and the moon. The actual problem is the cutting edge.

A properly sharpened graver glides through metal and leaves a mirror behind it. A dull or badly sharpened graver scrapes through metal and leaves a grey trail. Same hand, same piece, same conditions: the difference between professional and amateur work is often just the state of the graver.

If you take one thing from this page, take this: stop and resharpen the moment a cut starts looking grey instead of mirror. Don't push through. The five minutes it takes to resharpen will save the piece.

The geometry that matters

A setting graver has three surfaces that determine how it cuts:

• The face. The flat surface at the front of the graver that does the cutting. The angle of the face (the "face angle") determines how aggressively the graver cuts and how the chip lifts.
• The heel. The angled surface behind the cutting edge that gives clearance so the back of the graver doesn't drag in the cut. The heel angle is the second critical geometry.
• The cutting edge. The line where the face meets the heel. This is the actual cutting edge. Its sharpness depends on the polish of both surfaces meeting at it.

You sharpen by working both surfaces (face and heel) until they meet at a clean, polished edge. The angles you set for each are what control how the graver cuts.

The two profiles you need for setting

Onglette

The onglette is the V-shaped graver used for fine cuts: bright cuts, bead-raising on smaller stones, narrow channels. It's the most-used profile in micro setting.

Typical sharpening for setting work:

• Face angle: 45 degrees
• Heel angle: 15 degrees
• Polish to mirror on both surfaces

Some setters prefer a slightly steeper face (50 degrees) for harder metals like platinum. The trade-off is a more aggressive cut at the cost of slightly more effort to push.

Flat

The flat graver is used for wider cuts: bead-raising on larger stones, the wider bright cuts between rows, and the surface preparation for some bezel and channel work.

Typical sharpening for setting work:

• Face angle: 45 degrees
• Heel angle: 15 to 20 degrees
• Polish to mirror on both surfaces

The kit you need

You can sharpen carbide gravers freehand on a diamond stone, but the consistency you need for setting work is hard to achieve without a jig. Most working setters use one of the following systems:

• GRS Power Hone with the dual-angle fixture. Industry standard for North American and European setters. Repeatable, reliable, fast.
• Lindsay Universal Sharpening Fixture. Excellent precision. Slightly more setup but exceptional finish.
• Diamond laps in a range of grits: 600 for shaping, 1200 for sharpening, 3000 (or finer) for the final polish.
• A loupe or microscope to inspect the cutting edge after sharpening. Looks fine to the naked eye is not the same as actually fine.

If you're equipping yourself from scratch, expect to spend £400 to £900 on a complete sharpening setup. It pays for itself rapidly in the time you stop wasting on dull gravers.

The sharpening sequence

Step 1: Set the face angle

Lock the graver in the jig at the face angle you want (45 degrees for most setting work). Bring the face to the diamond wheel and cut the face flat. Use a 600 grit lap if the graver is being shaped from rough, or 1200 if you're refreshing an existing edge.

Step 2: Set the heel angle

Reset the jig for the heel angle (typically 15 degrees). Bring the heel to the wheel and cut the heel surface. The heel removes material from behind the cutting edge so the back of the graver doesn't drag in the cut.

For an onglette, you'll cut two heel surfaces (one on each side of the V). For a flat, just the one heel surface behind the flat face.

Step 3: Polish both surfaces

Move to a finer lap (1200 then 3000, or whatever your finest is). Polish the face first, then the heel. The cutting edge is only as sharp as the rougher of the two surfaces meeting at it, so both have to be brought to a polish.

Step 4: Inspect

Under the microscope or a strong loupe, look at the cutting edge. You should see a clean line where the polished face meets the polished heel. If you see a wire edge (a small flange of metal hanging off the edge), strop it off on a leather or felt wheel.

Step 5: Test

Thumbnail test. Drag the cutting edge across the back of your thumbnail. It should bite and drag, not skip. If it skips, something is wrong: the heel angle might be too shallow, the face might not be polished enough, or there might be a wire edge. Diagnose, fix, repeat.

Common sharpening mistakes

Skipping the polish step

The single most common mistake. A graver sharpened to 600 grit will cut metal, but the cuts won't be bright. The polish from a finer lap is what makes the difference between a cut that catches light and a cut that doesn't. Don't skip it.

Wrong face angle

Too shallow (under 40 degrees) and the graver will dig in too aggressively, making it hard to control. Too steep (over 55 degrees) and the graver will skate over the metal without biting. Stick to 45 to 50 for setting work and adjust based on the metal you're cutting.

No heel relief

If the heel angle is too shallow or you've forgotten to cut a heel at all, the back of the graver will drag in every cut. The graver will feel like it's binding instead of cutting. Cut a proper heel.

Not stropping off the wire edge

After sharpening, there's often a microscopic flange of metal hanging off the cutting edge (a "wire edge"). This will give you a few grippy cuts and then break off, leaving you with a dull edge. Strop it off on a leather or felt wheel before you start setting.

Sharpening on the wrong material

Carbide gravers need diamond. Steel gravers can be sharpened on Arkansas or India stones. Don't try to sharpen carbide on anything other than diamond, and don't waste a diamond lap on steel when an Arkansas stone will do it cheaper.

How often to resharpen

Depends on the metal you're working in and how aggressively you're cutting. Some rough rules:

• Yellow gold: a sharpened graver lasts a few hours of continuous setting before needing a refresh.
• White gold: half that. White gold is harder and chews edges faster.
• Platinum: a full resharpen every hour or two of setting. Platinum drags badly on a dull graver.
• Silver: rarely set seriously, but graver lasts a long time in silver because it's soft.

The honest answer is: stop checking the clock and start checking the cut. The moment a bright cut starts looking grey, stop and resharpen. Your work will be transformed.

Common questions

Can I sharpen carbide gravers freehand?

Technically yes, in practice no. The angles need to be too consistent for freehand work to deliver setting-grade results. Use a jig.

How long does sharpening take with a jig?

Once you're set up and practised, a full sharpen and polish takes 5 to 10 minutes per graver. A quick refresh on a 1200 lap takes 2 minutes.

Do I need different gravers for different metals?

Same gravers, sometimes different angles. Some setters keep a "platinum graver" sharpened slightly more aggressively than their gold gravers. Others use the same setup for everything. Personal preference.

What's the best beginner sharpening setup?

A GRS Power Hone with the dual-angle fixture, a 600 grit lap, a 1200 grit lap, and a felt strop. That's enough to do everything a setter needs for years.