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Product Queries

  • Does my product have a Warranty / Guarantee?

    Yes – all our products, test equipment and knife sharpeners have a Guarantee for a year from the date of purchase against electrical and mechanical defects in materials & workmanship. Repairs or part replacement required as a result of such defects will be made free of charge during this period. Proof of purchase must be provided. Full details on our Guarantee, can be requested through the contact form.

  • What is CBN?

    CBN stands for Cubic Boron Nitride. Our Catrasharp knife sharpeners have small replaceable grinding wheels that are coated in highly abrasive CBN. Knives sharpened with CBN spiral wheels can have up to twice the cutting edge life of knives sharpened on conventional wheels or belts as they don’t overheat and therefore soften the first 2 – 5 microns of the edge. The high thermal conductivity of CBN also means no water is required to cool the knives whilst sharpening.

  • Why use CBN?

    Diamond is one of the hardness substances known to man and CBN comes very close behind it, so the obvious choice would be diamond. But most knives are made from steel (either stainless or alloy steels), which contain a certain amount of carbon.

    The science behind it told us diamond is in fact a carbon crystal, which when grinding along the surface of steel reacts with the carbon atoms within it and causing premature wear. Therefore in a practical sense CBN lasts much longer than diamond. Manufacturers of sharpening systems that use diamond either don’t know this fact, or would rather you bought more sharpening wheels because they wear out faster, or they believe the marketing of diamond sells more products.

    However as CATRA is the worlds leading sharp edge technology centre we believe in using the best and most efficient material for the process.

    “Can diamond be used at anytime else?”

    Yes, the above mentioned effect is most noticeable at high speed and power and so in the case of sharpening steels and proprietary sharpeners operated by hand, diamond is OK. We at CATRA do use diamond on the low powered CATRAHONE knife sharpener.

  • What else does CATRA do?

    In addition to Knife Sharpeners the Cutlery & Allied Trades Research Association specialises in test equipment, testing services and consultancy for knives, tools, cookware, utensils and more across the Cutlery, Health, Medical and Tooling industry.

    For enquiries on other products offered by CATRA please see our company site “Here” or email us at sales@catra.org