Blog - Gritomatic
December 13, 2018


Sneak peek: Metallic Bonded Diamonds

New Metallic Bonded Diamonds are more wear-resistant and have better geometry "out of the box" than resin bond Venev diamonds. Metallic diamonds are available in 7 grits, the coarsest is 40 grit (500 microns).


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December 11, 2018


Future Products Public Statement

No matter how hard Hapstone company tried to bring products on the market, unexpected circumstances caused multiple delays in production. Therefore, Gritomatic and Hapstone came to the tough decision to cancel all active preorders and eliminate preordering at Gritomatic. Breaking the promises is much worse than delays in production. We apologize to all customers.

All upcoming products are still in development, including Hapstone R1 (in the final stage). No product we ever mentioned in social networks, forums and tradeshows, has been canceled. However, all upcoming or out-of-stock Hapstone products are  "Done, when it's done".

October 06, 2018


Migration from Wicked Edge

Hapstone has recently introduced the Guide Rod for Wicked Edge stones and paddles. The Guide Rod is optional accessory compatible with Hapstone M2, V7, V6 knife sharpeners as well as upcoming Hapstone R1. It can be purchased in Gritomatic. In order to simplify the migration from Wicked Edge to Hapstone, for all new orders of Hapstone knife sharpeners, the Guide Rod will be shipped for free. after a customer provides photo proofs of Wicked Edge ownership.

Hapstone knife sharpeners become the most versatile and capable to use the vast majority of existing sharpening stones including Edge Pro, KME, Spyderco, bench stones up to 210 mm, pocket stones of any size, and now Wicked Edge!

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May 25, 2018


Gritomatic on Blade Show 2018

At last, we have received the final production sample of Hapstone R1. We are ready to show it!

Hapstone R1 completes the full product line of knife sharpeners:

  • Hapstone M2 in the economy segment
  • Hapstone V7 in the middle
  • Hapstone R1 in the high-end segment

It was the tough time for Hapstone as R1 and M2 were in development simultaneously. R1 was almost ready in 2017 but was completely redesigned.

We will show all three knife sharpeners on upcoming BladeShow 2018 in Atlanta.

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February 04, 2018


Upcoming products

Gritomatic will add many new KME stones in March. A little preview of first three:

  1. Transition Coticule - purplish blend layer between Yellow Coticule and BBW with unique properties (like a higher performance than Coticule and BBW.) [Photo shows BBW - Transition Coticule - Yellow Coticule for comparison]
  2. Alumina-Zirconia Ceramic (limited edition) - the cut of a LapMaster ceramic disk for lapping microprocessor integral chips. Alumina-Zirconia outperforms Alumina in abrasion resistance.
  3. Soft Washita from Dan's Whetstone - coarser version of Soft Arkansas.
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October 17, 2017


Interactive grit chart

Take a look at our new Interactive grit chart. Whenever you have any sharpening stone opened in, you may see grit information in specs. Different colors corresponds to grit range (extra coarse/coarse/medium/fine/extra fine/ultra fine), and abrasive scale is specified.

If you want to check how these grits correspond to another scale, you may click button to open interactive chart. The emphasized column is an abrasive scale used for the selected sharpening stone. Crystal shaped marks show values available grits or a composition of stone set. The green horizontal ruler floats above mouse cursor and helps you to convert grit to another scale. Phone and tablet users may click anywhere to move the ruler to another position.

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October 14, 2017


Renaming Attention

Gritomatic synthetic stones made of silicon carbide and aluminum oxide can be labeled in either FEPA-F or JIS grit scale. To make grit uniform and customer-friendly, we have started transition to the japanese (JIS) grit scale for all Gritomatic waterstones. Old naming: F 120, F 220, F 400, F 600, F 1000. New naming: 120, 240, 600, 1000, 2500.

October 12, 2017


Hapstone V7 Hints

There are some counter-intuitive things in Hapstone V7 not covered by User's Guide.

1) The stone holder has little black screw as shown on photo. You can think its purpose is fastening 2 parts of horizontal rod during assembling. But it's not. The little screw is stopper limiting movement of stone holder during readjusting. It's not intended to be used other way. Assembly of horizontal rod is made by hands only, without any tools.

2) The official angle range for Hapstone V7 is 11 to 47 degree, which outperforms most of competition sharpeners. However, you can extend angle range to insane 3 degree! You will not find it in User's Manual, because there are some limitations. If you need super acute sharpening angle, you may detach three point guide and thickness compensator from V7 base. These are main obstacles for super acute angles. Limitations: you have to opt out three-point guide; V7 must be positioned close to far side of your table to give the horizontal rod enough space for movement.

3) Hapstone V7 does not have "scissors sharpening" in feature list. Scissors attachments is still in development, but you can set blunt angle up to 70 degree right now. There is round hole in the middle of V7 base. Using scewdriver you can detach orange pivot rod holder and attach it in the middle. Now, if you fasten your scissors on working table, you can sharpen it!

September 27, 2017


Hapstone V7 announced

Hapstone v7 knife sharpener utilize square-shaped components to deliver ultimate precision

27th September 2017 - HAPSTONE has just launched HAPSTONE V7, 7th generation of successful V-series. V7 is being heralded as the ultimate knife sharpener with ability to use thousands of sharpening stones. The new V6 delivers breath-taking features while pushing the boundaries for knife sharpening enthusiasts who demand the best.

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September 10, 2017


Gritomatic update


For all US orders above $100 we adopt free shipping. For all US orders below $100 the standard shipping is 2-4 days (for $5.9 shipping cost). We have eliminated the slower shipping, with exception of Alaska & Hawaii.

New arrival

Many products are out-of-stock now. We apologize for that. New arrival is estimated on the end of September - beginning of October. You can request to be notified by email - use "notify me" form on our-of-stock product you need.

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