TSUBOSAN Hardness Testing File Set
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Hardness testing made simple
This set of hardness-testing files from Tsubosan in Japan lets you estimate the hardness of metal surfaces, including flat, curved and inside surfaces. The curved tips help reach difficult shapes.
How to use the files
- Start with the black file, marked about 65 HRC, and lightly scratch the test material. If it leaves a mark, the material is softer than that file.
- Continue with the blue file, marked about 60 HRC. If it does not mark the material, the material is harder than the blue file and lies approximately between the blue and black test levels.
- If the blue file still marks the material, continue with the green file, marked about 55 HRC, and then use lower-hardness files until you find the point where a file no longer marks the surface. This gives an approximate hardness range.
Color-coded hardness levels
- Red: HRC 40–42 (HV 392–412)
- Yellow: HRC 45–47 (HV 446–471)
- Light green: HRC 50–52 (HV 513–544)
- Green: HRC 55–57 (HV 595–633)
- Blue: HRC 60–62 (HV 697–746)
- Black: HRC 64–66 (HV 800–865)
Practical design
The files are made of quality steel, with color-coded handles for quick identification and a comfortable grip. Curved tips make it easier to test flat, convex and concave surfaces. They are useful for large workpieces, specialty steels and situations where a conventional hardness-testing machine is unavailable. The files can also remove light rust from a test area before measuring.
In the box
- Six files covering approximately HRC 40–66
- Color-coded handles
- Sturdy black storage case
A practical set for knife makers, blacksmiths, metalworkers and others who need a quick approximate check of metal hardness.
We ship almost all orders on the same business day if you order before 2:00 PM.
Standard delivery time: 1–3 business days with Bring.
Customers in Northern Norway may experience an extra day or two in some cases.
Tracking:
You will receive a tracking number via email as soon as the package has been shipped.
100% satisfaction guarantee:
We are completely confident that you will be satisfied. We are so confident that we offer both a full return and coverage of return shipping. Regardless. So, it is completely risk-free for you to order now to inspect the product yourself in your own home and at your own pace.
We also stock spare parts and wear parts, so if you should be unfortunate enough to break something or, against all odds, manage to wear out the sharpening stones, these can be easily replaced.
Easy returns:
Contact our customer service, and we will send you a pre-filled return label.
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Description:
Hardness testing made simple
This set of hardness-testing files from Tsubosan in Japan lets you estimate the hardness of metal surfaces, including flat, curved and inside surfaces. The curved tips help reach difficult shapes.
How to use the files
- Start with the black file, marked about 65 HRC, and lightly scratch the test material. If it leaves a mark, the material is softer than that file.
- Continue with the blue file, marked about 60 HRC. If it does not mark the material, the material is harder than the blue file and lies approximately between the blue and black test levels.
- If the blue file still marks the material, continue with the green file, marked about 55 HRC, and then use lower-hardness files until you find the point where a file no longer marks the surface. This gives an approximate hardness range.
Color-coded hardness levels
- Red: HRC 40–42 (HV 392–412)
- Yellow: HRC 45–47 (HV 446–471)
- Light green: HRC 50–52 (HV 513–544)
- Green: HRC 55–57 (HV 595–633)
- Blue: HRC 60–62 (HV 697–746)
- Black: HRC 64–66 (HV 800–865)
Practical design
The files are made of quality steel, with color-coded handles for quick identification and a comfortable grip. Curved tips make it easier to test flat, convex and concave surfaces. They are useful for large workpieces, specialty steels and situations where a conventional hardness-testing machine is unavailable. The files can also remove light rust from a test area before measuring.
In the box
- Six files covering approximately HRC 40–66
- Color-coded handles
- Sturdy black storage case
A practical set for knife makers, blacksmiths, metalworkers and others who need a quick approximate check of metal hardness.