Renlaw will keep producing and distributing our tools during the Covid-19 lockdown period.
New Engineering, New Machines – Blades Sharper and Faster than ever.

New Engineering, New Machines – Blades Sharper and Faster than ever.

The Lutz PX1000

Introducing the newest member of the Renlaw team

Renlaw is proud to be adding to our prestigious collection of high-end blade manufacturing and re-sharpening machinery with one of the most sought-after Lutz professional blade sharpening machines.

This elegant specimen of expert engineering will support Renlaw’s existing blade resharpening services. The Lutz PX1000 make us even more capable in assisting our clients than ever. The Lutz PX1000 means a faster turn around time than ever on resharpening. Expect the same top quality results our customers have come to expect from Renlaw.

Why does resharpening mean so much to us? It’s simple – resharpening fits in with our commitment to providing sustainable, high quality products to our customers. Other blade manufacturers may sell cheap, disposable blades that need to be replaced frequently. Renlaw believes in providing products that last, blades that stay sharp, and service which allows you to keep using those blades for that much longer.

Call us old fashioned – but Renlaw upholds the belief that quality and excellent workmanship are more important than quick fixes.

We stand against the disposable culture. Our way of doing things is motivated by two of our most important core beliefs: Quality products are our pride; and sustainable practices ensure a better future for generations to come.

Currently, our resharpening services are utilized predominantly by our Cape Town based clients, but we are working towards growing this service further afield. After all,Renlaw is Africa’s leading blade manufacturer.

Are you an engineering enthusiast like us?

Do you love to analyse the specs and compare the thought processes that went into engineering the best of the best machines and products?

If you do, this link is for you.

Read more about the Lutz PX1000 and all of it’s specs HERE.


The Lutx PX1000

Engineering Stats for Enthusiasts 

More about Renlaw’s new Luts PX1000 machine 

Things the Renlaw Engineers are geeking out about right now…

This beautiful Lutz machine has a useful grinding length of mm 1000 and has a magnetic chuck mm 117 wide and rotating from 0° to 90°. The grinding wheel motor is 3 HP, it has a reduction gear for the carriage feed 0,15 HP with fixed speed, adjustable carriage run by means of two adjustable mechanical stops, automatic wheel downfeed controlled by a potentiometer, head inclination +/- 3°. 

The basement is built in electro-welded steel and it undergoes a stress relieving treatment at a temperature of 650° in order to eliminate any stress, as well as to guarantee stability in time and precision. 

The sliding guides of the carriage are all one piece, and after undergoing planning and grinding procedures, both upper and lateral, they are covered by high precision tempered and rectified steel strips. 

The rotating chuck has two mechanical stops at 0° and 90° and is supplied with two stepped knife holders for the sharpening of four planer knives at once and with four clamping devices. On the operator side, two adjustable mechanical stops allow the choice of the carriage run length. 

The carriage is made in solid metal carpentry. 

It slides over four adjustable bearings with high precision. A reduction gear put in motion by a three-phase motor positioned on the basement moves the carriage by means of a trapezoidal belt. 

The grinding head is solid and compact and has a two poles motor, an electronic wheel down-feed, a ceramic cup wheel and can be tilted. 

The electric & electronic equipment is built in accordance to European safety Norms and it differs according to the options requested. A particular technique in the preparation of the surfaces, and the use of paints having a high chemical and mechanical resistance allow the machine to be highly resistant to the corrosive effects of the coolant over time. 

Grinding wheel downfeed and spark out cycle can be programmed on this model. 

Over the grinding head, the machine has a vernier by means of which the total material to be removed can be programmed: once this amount has been removed, the grinding wheel downfeed stops and the spark out working cycle begins. 

Digital programmer main functions: 

  • grinding wheel
  • motor start
  • water pump and magnetic cleaner start 
  • Carriage travel start 
  • magnetic chuck on 

It can also set following parameters: grinding wheel partial downfeed, sparkout time, carriage speed, grinding wheel downfeed at right side or right/left sides, and grinding wheel downfeed delay time. Once the machine has completed every working cycles, it stops automatically.

Industrial Cutting Solutions

Industrial Cutting Solutions

Blade Manufacturing & Production

The vast majority of production and manufacturing processes require some kind of cutting. Whether it’s parts, food, or packaging materials, things have to be shaped, sized and cut out to create the perfect product.

That’s where machine blades come in. There’s an art to the creation of top-quality industrial cutting tools, which must be carefully manufactured to give them both long sharp-lives and the excellent cutting edges needed to cut through a myriad of materials cleanly, efficiently, and precisely.

What makes an excellent blade?

What sets industrial machine blades apart from other blades? What allows them to cut through even the toughest of materials while other knives struggle to cut through the skin of a tomato?

The answer is not just that machine blades are incredibly sharp. The secret is finding the optimal cutting geometries and the ideal balance between hardness, toughness, and strength (and yes, there is actually a difference).

The blade’s hardness

This is the knife’s resistance to indentation, scratching, and wear, measured with the Rockwell scale. The higher the Rockwell number, the harder the metal is. But hard doesn’t equate to tough or durable, and in fact, if something is too hard it can break or chip easily.

Think of a glass chopping board and a wooden chopping board. The wooden board will be easier to scratch than the glass one but if you drop them both the glass board will probably shatter, whilst the wooden board will be fine.

The blade’s toughness

This is how well a knife resists breaking force – the ability to bend and deform rather than crack. Toughness involves some elasticity, which allows the knife to take on the stress of use without breaking. 

The blade’s strength

This is the measure of the blade’s resistance to deformation — the ability to maintain its shape when forces are applied to it.


For the perfect blade, you need the right blend of hardness, toughness, and strength, and this will vary according to what kind of material is being cut and under what working conditions.

We control this by carefully selecting the best type of steel as well as the hardening and heat-treatment processes that best suit each specific application.

All of this is critical to ensure that your blades withstand the demands of a tough production environment. 

What kinds of machine blades are there?

Due to the fact that there is an enormous variation in the type of materials that need to be cut in production facilities, there is a huge range of blades types available, in all kinds of shapes and sizes.

Depending on what you’re producing and cutting, there’s a knife out there that’s best suited to your industry. A few types of machine blades include:


Circular knives – a versatile blade used in a number of industries, from food to packaging and print to the automotive and metal working industries.

 Straight knives – this encompasses many different types of blades, everything from rubber croppers to apple slicers.


Pineapple slicers

Toothed knives – A common type of knife, this is any blade with a serrated edge, used for cutting meat, plastic, metal and paper, just to name a few.

 Small perf blades

Tray-form knives – These are shaped blades most often used in the convenience food and packaging industry.

 Rectangular tray knives

Shear blades – Used in a number of industries, these can function like oversized scissor sets.


Metal cutting saw blades – As the name suggests, these saws are adept at cutting through metal.

Tooth type HZ - Metal Cutting Blades


Boost your production with quality industrial cutting tools

All industries in production stand to benefit from having well crafted, durable industrial knives. Knives that last longer keep your downtime to a minimum, and sharper knives don’t just cut quickly, they cut precisely, improving the quality of your products and maximizing your efficiency.

To support a number of industries, we offer one of the most comprehensive ranges of machine knives and blade sharpening services in Cape Town. We support the food-processing, poultry, packaging, printing, film, automotive, and converting industries, amongst others.

Renlaw is the leading blade manufacturer in South Africa, supporting an extensive range of businesses with quality machine knives and industrial sharpening services. Browse our collection of knives to find the perfect industrial cutting implements for you or contact us to discuss your individual blade and production requirements.

Covid-19 – Stressful times, but here’s one less thing to worry about…

As our industrial machine knives and blades are an essential product for many of South Africa’s biggest food manufacturers, we want you to know that Renlaw will keep producing and distributing our tools during the Covid-19 lockdown period.

It’s our way of ensuring that food production continues and that there is continued access to groceries during the tough times ahead.

We also want you to know that we are putting the safety of our staff and families first while we do so, because people are at the heart of our business.

We will continue to produce top-quality blades, doing our part to ensure there is MORE than enough to go around.

Better days are coming. WE’RE IN THIS TOGETHER!


Oilmax Oil Filtration System

Renlaw is pleased to announce our latest investment: the Oilmax CCS B centrifugal oil cleaner. We have imported this nifty machine (one of only two in the country) from Asia and are incredibly pleased with its performance.

Using centrifugal force, the Oilmax spins our used specialized machine oil around at an extremely high speed, resulting in a force equal to 2 000 times the force of gravity. This separates any suspended metal particles and other impurities from the oil and deposits them on inner wall where they can quickly and easily be cleaned away.

Being able to properly clean and re-use our oil has considerable benefits to the environment. The spun oil is cleaned of even the finest particles of metals and dust, removing particles as small as 1 μ (invisible to the naked eye), which is way beyond the capabilities of conventional oil filters. Renlaw is now able to re-use machine oil for longer and are proud to have invested in technology that lessens our business’s environmental impact without us needing to compromise on quality at all. We urge other businesses to also find out about technologies and innovations that can help reduce pollution, save water and ultimately contribute to making this a better Earth.