Naoru lapping plate with diamond dust, set 0510
Code: SHA-0510Product detailed description
Precise sharpening-stone maintenance
SHAPTON Naoru lapping plate with two abrasive powders
A Japanese cast-iron system for cleaning and flattening the surface of water sharpening stones. Coarse and medium silicon-carbide powders are included.
SHAPTON Naoru is a professional cast-iron lapping plate designed to restore a flat, clean and properly functioning working surface on sharpening stones. It helps remove both a clogged surface layer and unevenness caused by repeated knife sharpening.
A flat sharpening stone is important for precise blade guidance and even bevel formation. A dished or unevenly worn stone may alter contact with the edge, make it more difficult to maintain the angle and reduce the quality of the sharpening result.
The set contains a cast-iron lapping plate and two bottles of silicon-carbide abrasive powder – coarse and medium. The system is intended primarily for SHAPTON stones, but it can also be used with suitable water stones from other manufacturers.
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Why keep a sharpening stone flat?
More precise edge guidance
A flat working surface provides predictable contact between the blade and the abrasive and makes it easier to maintain a stable sharpening angle.
Restored abrasive performance
Lapping removes the clogged layer containing metal particles and exposes fresh abrasive. The stone can then work faster and more evenly.
Controlled surface flattening
The large 250 × 100 mm cast-iron surface provides a stable base for even treatment of the stone’s entire working surface.
Two lapping stages
Use the coarse powder for faster removal of more pronounced unevenness. The medium powder is intended for finer flattening and surface finishing.
What does the SHAPTON Naoru set contain?
Cast-iron lapping plate
A solid working surface measuring 250 × 100 × 28 mm, designed for cleaning and flattening water sharpening stones.
Coarse lapping powder
Silicon carbide with faster material removal for eliminating more pronounced dishing, larger uneven areas and a heavily clogged surface layer.
Medium lapping powder
Finer silicon carbide for routine maintenance, subsequent refinement and finishing of the surface after using the coarse powder.
Cleaning or flattening?
| Stone condition | What is required | Recommended procedure |
|---|---|---|
| Dark, smooth or clogged surface | Clean and expose fresh abrasive | Brief lapping with medium powder |
| Slightly dished stone | Restore flatness | Controlled flattening with regular pencil-grid checks |
| More pronounced unevenness | Faster material removal | Begin with coarse powder and finish with medium powder |
How to use the lapping plate correctly
- Place the plate on a stable working surface that can be wetted safely.
- Wet both the lapping plate and the sharpening stone with clean water.
- Apply a small amount of the selected lapping powder to the plate.
- To check flatness, draw a simple grid on the stone with a pencil.
- Move the stone smoothly across the plate and use the entire surface.
- Do not apply pressure to only one corner or one part of the stone.
- Pause regularly, rinse the surface and check material removal.
- Stop lapping once the reference grid has disappeared and the surface has been treated evenly.
- Rinse the plate and stone thoroughly and allow them to dry separately.
Work with controlled pressure
Silicon carbide removes material quickly. Add only a small amount of powder, work without excessive pressure and check the stone’s flatness regularly.
How can you tell that a stone needs flattening?
- There is a visible or noticeable hollow in the centre of the stone.
- The stone does not sit evenly when placed on a flat surface.
- During sharpening, the blade touches only part of the working surface.
- It is difficult to maintain the same sharpening angle along the entire edge.
- The stone’s surface is dark, smooth and heavily clogged with metal particles.
- The stone sharpens more slowly than before, even though it is sufficiently wet.
SHAPTON stones are generally hard and retain their flatness for a relatively long time. However, the required lapping frequency always depends on the specific range, grit, applied pressure, working method and frequency of use.
Which stones is SHAPTON Naoru suitable for?
The system is designed primarily for SHAPTON water sharpening stones. It can also be used with suitable synthetic water stones from other manufacturers. Always follow the recommendations of the manufacturer of the specific stone before use.
Naoru is not intended for sharpening knives
It is a device for maintaining sharpening stones. A knife blade must not be sharpened directly on the cast-iron plate or on the lapping powder itself.
Technical specifications
| Brand | SHAPTON |
|---|---|
| Model | Naoru |
| Product type | Cast-iron lapping plate |
| Plate dimensions | 250 × 100 × 28 mm |
| Plate material | Cast iron |
| Lapping abrasive | Silicon carbide (SiC) |
| Powders included | Coarse and medium |
| Product code | SHA-0510 |
| EAN | 4944509005103 |
| Country of manufacture | Japan |
Cleaning and storing the lapping plate
After every use, rinse the cast-iron plate thoroughly to remove silicon-carbide residue and sharpening slurry. Then dry it immediately and carefully, as prolonged moisture can cause surface corrosion on cast iron.
- Do not leave the plate standing in water.
- Rinse it after use and dry it immediately.
- Keep the powders sealed and dry.
- Prevent the coarse and medium powders from mixing.
- Protect the plate from drops and strong impacts.
- Store it separately from wet sharpening stones.
For a complete sharpening workstation
SHAPTON GlassStone
Professional Japanese sharpening stones on a stable glass base.
View GlassStone sharpening stones ›Sharpening accessories
Holders, bases, flattening tools and other equipment for safer work.
View sharpening accessories ›Knife-sharpening course
Learn the correct angle, how to work with a burr and how to care for the sharpening stone’s working surface.
View the sharpening course ›Need advice?
Call us on +420 702 049 048, Monday to Friday between 7:30–16:00. We will help you verify whether the system is suitable for your sharpening stones.
Frequently asked questions
What is SHAPTON Naoru used for?
It is used to clean and flatten the working surface of water sharpening stones.
What does the set contain?
It contains a cast-iron lapping plate and two bottles of silicon-carbide powder – coarse and medium.
When should the coarse powder be used?
For more pronounced unevenness, dishing or a heavily clogged surface where faster material removal is required.
When should the medium powder be used?
For routine maintenance, finer flattening and finishing the surface after coarse lapping.
Can stones from other brands be lapped?
Yes, the system can also be used with suitable water stones from other manufacturers. However, follow the recommendations of the manufacturer of the specific stone.
How can the stone’s flatness be checked?
Draw a pencil grid on the dry working surface. During lapping, the marks should disappear evenly from the entire surface.
How often does a stone need to be flattened?
This depends on the frequency of use, the stone’s hardness, applied pressure and degree of wear. Lap the stone when dishing or a clogged surface appears.
Can a knife be sharpened directly on the plate?
No. SHAPTON Naoru is intended for maintaining sharpening stones, not for sharpening knives directly.
How can corrosion of the cast-iron plate be prevented?
After every use, rinse the plate, dry it thoroughly immediately and store it in a dry place.
Additional parameters
| Category: | Grinding stones SHAPTON |
|---|---|
| Warranty: | 2 years |
| Weight: | 1.735 kg |
| EAN: | 4944509005103 |
| production: | Japan |
SHAPTON – Japanese specialist in sharpening stones
SHAPTON Co., Ltd. is a Japanese manufacturer of synthetic sharpening stones and accessories for precise edge maintenance. The brand is known for fast abrasive action, a stable structure and a wide choice of grits for kitchen knives and craft tools.
SHAPTON is based in the town of Mashiko in Japan’s Tochigi Prefecture. The company focuses on developing sharpening stones that allow fast, controlled and highly repeatable edge work. Its products are used by professional sharpeners, chefs, craftspeople and home users who want to maintain their knives by hand.
SHAPTON sharpening stones feature a high concentration of abrasive particles and a carefully designed bonding system. This allows them to remove material efficiently, provide clear feedback during sharpening and wear more slowly than many softer stones. The wide grit range makes it possible to repair a damaged edge, create a new bevel, restore ordinary working sharpness and carry out extremely fine final polishing.
You can find the complete selection in the SHAPTON sharpening stones category.
Why are SHAPTON stones so popular?
Fast abrasive action
The high abrasive content makes it possible to restore the bevel effectively even on harder modern steels. With correct technique, there is therefore no need to apply heavy pressure to the blade.
No long soaking required
SHAPTON stones are designed for quick preparation. Before sharpening, the surface is usually only moistened with water, allowing you to start working without a long wait.
Lower wear
The optimised bonding system helps use the abrasive particles more efficiently. The stones therefore retain their working properties for a relatively long time, although their flatness still needs to be checked regularly.
Wide range of grits
From coarse repair stones to extremely fine polishing stones. Users can create a progressive sharpening sequence according to the condition of the knife, the steel used and the desired result.
Main SHAPTON sharpening-stone ranges
SHAPTON Kuromaku
Kuromaku is the classic range of solid synthetic sharpening stones. Individual grits are colour-coded, making it easier to distinguish between multiple stones while working. Each stone comes with a practical plastic case that can also be used as a base during sharpening.
SHAPTON GlassStone
The GlassStone range uses a thin abrasive layer firmly bonded to a glass base. The glass support provides dimensional stability and makes even a thin abrasive layer easier to handle. The extensive grit selection allows users to build a progression from basic sharpening to an exceptionally fine finish.
SHAPTON RockStar
RockStar is a modern premium range combining strong abrasive performance, a uniform structure and a finely controlled result. It is also designed for hard blades and users who want fast work without long soaking.
Which SHAPTON grit should you choose?
The brand or product range itself does not influence the result as much as choosing the correct grit. A coarse stone removes steel quickly, while a fine stone smooths the marks left by previous sharpening and refines the finished edge.
| Grit | Suitable use | Who it is suitable for |
|---|---|---|
| #120–#500 | Repairing a damaged edge, changing the bevel and working on a very dull knife. | More experienced users and repair sharpening. |
| #1000 | Restoring ordinary working sharpness and creating a new cutting edge. | The best first stone for most kitchen knives. |
| #1500–#3000 | Smoothing the bevel and providing a finer finish after basic sharpening. | Home cooks and more demanding users. |
| #4000–#8000 | Fine finishing and polishing of high-quality kitchen knives. | Japanese knives and blades requiring a smooth finish. |
| #12000–#16000 | Extremely fine specialised polishing after the previous stages. | Experienced sharpeners and specific edge-surface requirements. |
A simple recommendation for beginners
When buying your first sharpening stone, begin with #1000 grit. Add a #3000 stone for a finer finish. A coarse stone around #320 or #500 makes sense when the edge is damaged or significantly dull.
Maintaining SHAPTON sharpening stones
During sharpening, the working surface of every water stone gradually wears and may become hollow in the centre. An uneven stone makes it harder to control the angle and can result in an irregular bevel. It is therefore important to clean the surface continuously and flatten it when necessary.
- Moisten the stone before use according to the instructions for the specific range.
- Keep sufficient water on the surface while sharpening.
- Remove sharpening slurry and metal particles after use.
- Check the flatness of the working surface regularly.
- Allow the stone to dry naturally away from direct heat.
- Store the dry stone so that it cannot fall or suffer mechanical damage.
Holders, lapping tools, cleaning discs and other equipment can be found in the sharpening accessories category.
Would you like to learn how to sharpen correctly?
A high-quality sharpening stone is only part of the solution. Maintaining a stable angle, creating a burr, applying pressure correctly and progressing through the individual grits are equally important.
View the knife-sharpening course ›Frequently asked questions about SHAPTON
Where does the SHAPTON brand come from?
SHAPTON is a Japanese company based in the town of Mashiko in Tochigi Prefecture, Japan.
What makes SHAPTON sharpening stones special?
They stand out for their fast abrasive action, high abrasive content, good dimensional stability and wide choice of grits.
Do SHAPTON stones require long soaking?
Usually not. SHAPTON stones are designed for quick use after the surface has been moistened with water. Always follow the instructions for the specific product.
Which SHAPTON stone should I choose first?
For ordinary kitchen knives, #1000 is the most universal grit. It restores the working edge without removing material as aggressively as repair stones.
What is the difference between Kuromaku, GlassStone and RockStar?
Kuromaku stones are classic solid, colour-coded stones in a case. GlassStone uses an abrasive layer on a glass base. RockStar is a modern premium range with fast and even abrasive action.
Are SHAPTON stones suitable for hard Japanese steels?
Yes. A correctly selected SHAPTON stone can also be used on many hard Japanese steels. The appropriate grit, a stable angle and moderate pressure are decisive.
Can tools also be sharpened on SHAPTON stones?
Yes. Depending on the chosen range and grit, they can also be used to sharpen chisels, plane irons and other cutting tools.
Why does a sharpening stone need to be flattened?
The stone may wear unevenly during use. A flat surface improves angle control, blade contact and the consistency of the finished bevel.
Need help choosing?
We will help you select a suitable SHAPTON range and progressive grits according to the knife type, condition of the edge and your experience. Contact Dellinger on +420 702 049 048 on working days between 7:30–16:00.
| EU representative of the manufacturer : | Dellinger s.r.o. |
|---|---|
| Address of the EU representative : | Rižská 1580/7 102 00 Praha |
| Email of the EU representative : | saleseu@dellinger.cz |