TTC 6 Piece Hardness Tester File Set

Performs as described. Using these hardness files to test hardness of annealed and heat-treated tool steels in my shop. Measures Rockwell C-scale hardness within a few points, not a precise testing tool but is not intended or advertised to test more precisely than plus or minus a few points of hardness. Certainly adequate for my purposes in tool making and woodworking.

Lo qye necesitaba gracias pir envio en tiempo

The Product is very good , had i known I was going to receive the lesser priced set. In the wrong language , I could have saved $10.00Don't get me wrong the product is still very usable and will be used.Still a good value.

Excellent hardness testers for the DIY folks. Use to test steel hardness. Use on bare metal and they are fantastic.

Easy to use and accurate. An essential tool when comparing steel hardnesses.

While somewhat expensive, they are much cheaper than an actual Rockwell C hardness tester, and accurate enough for most machine shop needs. They are Japanese made. Use the tip to scratch or dig in to the metal piece in question. If it scratches or just digs in then your metal piece is softer on the Rockwell C scale. Move to the next lower probe until it does not scratch or dig in on your metal piece in question. You have now bracketed the hardness to within a 5 unit range on the Rockwell C scale. The whole process takes about 5 seconds per test range. Highly recommended for when tempering steel to a desired hardness, or when trying to identify the type and hardness of unlabeled scrap pieces.

Seems to work well for testing hardness in steel.My gripe is the photo on the Amazon product page showed the instructions in English. What came had instructions in Chinese with a paper with printed instructions in English. One more thing to keep up with.

These are pricey, but indispensable if you have different bits of steel laying around and what to tell how hard they are, or want to check the results of your heat-treating. Use is pretty simple, gently scrub the surface with the files, starting at the hardest and moving to the softest. (Going from hard to soft keeps you from wearing out your soft files early.) The hardness of your test piece will be between the softest file that left a scratch and the next step down. People with experience using them say they can usually guess the hardness to within a couple of Rc points by the way the hard file feels when scratching a piece. But even a novice can get within 5 points using these.