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Designed and Manufactured by CATRA

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CATRASHARP knife sharpener

Sharpened angle - 30° inclusive angle ( 15°/ side) Gothic Arch

Grinding Wheel Diameter - 50mm ( 2")

Twin Motors - 240 or 110 volts (please specify) - 200 watts

Noise Level - < 82 dBa (whisper quiet)

Size - 320 mm x 140 mm x 120 mm ( shoe box size)

Weight - 5Kg

Special offer for 2018 complete machine £745 or approx US$1150 or 990 € + vat or duty


See our video below


-Produces very sharp knives and blades with long lasting cutting edges with proved by extensive tests


Over 380 of these knife sharpeners in use in supermarkets, over 850 in use in retail butcher shops, 270 in use restaurants, 400 in food manufacture/ processing and 35 in use in small sharpening services and shoe/heel bars

The sophisticated principle of Tapered Spiral Interlock grinding gives a convex section cutting edge of a constant angle( often known as Gothic Arch) without any burrs or edge protrusions. The edge generated is ideal for immediate use and can easily be maintained during the working day using a sharpening steel.

Small replaceable grinding wheels coated with the high-tech abrasive Cubic Boron Nitride give many advantages to our knife sharpeners, including:

The machine only generates metal dust which is kept within the main wheel guards by the use of magnets, any metal particles escaping from the knife entry slot are captured on the surface of the machine again by the influence of the built in magnetic field. this virtually eliminates any metal dust leaving the are of the machine and contaminating work surfaces and foodstuffs. Note however the knife blade is not magnetised within this system.

The grinding wheels have can have a life of 1000-5000 sharpenings dependent on the size and condition of knives sharpened and are replaced in less than 5 minutes. This makes the cost of resharpening less than 6p( 9c)/knife, but the gains in productivity through using a sharp knife can save you significant amounts of cash.

In stores, butcher shops etc typical sharpening wheel life is 2 to3 years

Typical sharpening times for a 6" (150mm) blade are:

Brand new never been sharpened 30-60 seconds
Heavily worn blade never been sharpened by CATRASHARP before 30-120 seconds
A worn blade after a good amount of work, but was last sharpened by CATRASHARP 8-15 seconds

This smallest machine of the commercial range of powered sharpeners produced by CATRA is ideal for businesses that have between 1 and 20 knife users or for low volume high quality knife makers.

Manufactured from stainless steel and aluminium it is suitable for use in all food processing environments. This is a extremely well engineered and manufactured product, it is not a toy or a domestic sharpener, its is at the fore front of sharpening technology and will give you many years of service.

Serrated and Scallopped blades can be resharpened using this machine. Please note there is no sharpener on the market that can resharpen this type of blade exactly as new, but they will all gradually sharpen away the serration or scallop.

Safety overload system built in to the machine prevents overloading the motors and more importantly prevent excessive sharpening and rapid loss of blade width which can easily happen on other more aggressive knife sharpeners.

CERAMIC knife blades can be sharpened with the alternative fixing of micro-fine diamond coated honing wheels the machine bringing the sharpness level back to the original manufacturers standard or better.

Many types of Robot Chef and Robot Coupe blades both plain and serrated can be sharpened using the CATRASHARP reducing blade replacement cost considerably.

Marinized version option is available for on board use in fishing vessels, trawlers, factory ships and fish processing plants

Purchase Prices complete machine shipping
UK £ £745 + vat £16 +vat
USA $ $1150 + import duty $155
Euro 990€ + vat 90€


We will ship anywhere in the World

Knife Sharpener Rental

In the UK only, we offer the CATRASHARP knife sharpener for rent ( subject to credit satus). A minimum of 1 month contract ( after which you can return it if you dont like it) and after 3 years continuous rental the machine becomes your property. The machine will be serviced during the rental period by CATRA free of charge, with the exception of replacement sharpening wheels.

Rent £7.45 + vat/ week .... Please contact CATRA for full details

Machines, spares and replacement sharpening wheels can be purchased directly from CATRA or from our online shop. Machines in stock now!


We also have used, secondhand, ex demonstration and reconditioned machines available, contact us for our latest stock.

CATRA will buy back machines that are no longer need for a fair price as we have customers waiting.


Customer reviews

*****"We are very delighted with the performance of the Catraharp. They has been used extensively, sharpening the knife boxes in the 15 kitchens and the 3 bakeries. The improvement has been remarkable, not only in the original sharpening of the knives but in the blades retaining their edge.

This is a superior machine, engineered to the highest standards and we are delighted with it. Highly recommended.

It has been a pleasure dealing with you. The service and advice you gave us was tremendous, a class apart." Diarmuid Griffin,Glasgow College 2015


*****" I have started a small local domestic knife sharpening service using a CATRASHARP and my clients are really so impressed with the sharpness of their knives " Becky, Clapham Knife Sharpening, London


*****"The only Knife Sharpening System I have found that really works" Prize Winning Irish Butcher


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CATRA, Henry Street, Sheffield S3 7EQ, Great Britain Fax: +44 (0)114 272 2151 Tel: +44 (0)114 276 9736 Email: