Products

Precision Ground Stones

Surface-ground abrasive stones are useful tools for deburring and cleaning precision metal parts and tools. Unlike normal abrasive stones, they won't alter the geometry because they only abrade raised areas (such as small burrs or the edges of a damaged corner). They won't scratch because the stones are always used in pairs, which are rubbed together before use to remove contamination.

These stones will allow you to maintain precision tools, such as levels, parallels, magnetic chucks, and milling machine tables.

I offer pairs of both natural and synthetic precision-ground abrasive stones. (Precision-ground stones are always supplied in pairs.)

The natural stones are quarried in the French Pyrenees and the synthetic are produced by Tyrolit.

The natural Pyrenees stones work best on ground or finely milled surfaces, while rougher or oily surfaces and softer materials are better matched to aluminum oxide (synthetic) stones from Tyrolit.

The natural stones have some variation in color and will show superficial scratches, but this does not influence their function. The synthetic stones have a more uniform appearance, but a slightly more aggressive cutting action and a more open grain; they also have less tendency to load up with soft materials.

When treated with care, the stones should provide years of service. (It is possible to regrind the stones, should this prove necessary.)

They are best cleaned using an ultrasonic cleaner, although simply rubbing two stones together with white spirits will remove much of the accumulated metal.

For more information about the production process, please visit the about page .

Sizes

Although other options are available upon request, as standard I offer the following:

One pair natural Pyrenees stones, 13 x 60 x 120 mm

One pair synthetic 25 x 50 x 150 mm for the synthetic stones (Tyrolit)

Single beveled synthetic stones are also available with a profile as shown below. They will be ground on all faces.

Approximate dimensions: length 150 mm, width 50 mm, height 25 mm, and bevel angle 44 degrees.

Ground slipstones are also available.

Prices

As of June 2022 I have no stock or plans to make more.

For one pair of flat stones (either variety): 85€

One pair each, Natural and Synthetic: 150€

One single beveled stone with 3D-printed case: 80€

Prices include French VAT (20%) within Europe (EU) for sales within France and all non-business customers EU wide.

Businesses should provide their tax ID for exemption.

Shipping within France 6€ .

Shipping to anywhere in the EU and Switzerland is 16€ for up two stones, 18€ for three or more.

Please contact for shipping to other destinations.

Payment via bank transfer is preferred, other methods possible.

Customers may also purchase from my company in Norway if desired (payment via Vipps).

Please email me for information or to place an order.