Ball Unit Castors vs Single-wheel Castors

Castors are nifty little wheels that give mobility to a range of different kinds of furniture that we use at home and in the workplace. There are several types of castors available on the market, all of which exist to give you an abundance of options when you need to fit your chair or trolley with application-specific functionality.

In this blog, we’re going to be focusing on two popular kinds of castors: ball unit castors and single-wheel castors. These two types of castors are both dynamic and adaptable to several applications; let’s take a closer look at what they are, as well as their pros and cons.


Ball unit castors

Ball castors are wheels that allow movement in every direction. These omnidirectional castors consist of a small ball bearing that is fitted into a special type of swaged tubing that allows the ball to roll in every direction.

This technology is popular in the manufacturing and transport industries where it is used in conveyors of different kinds to transport goods and luggage. As castors though, ball units are used for several things, from transporting furniture around the office to giving small robots omnidirectional mobility.



  • Completely dynamic and adaptable;
  • Can be used in several applications;
  • Easy and quick to use;
  • Variety: ball casters come in different sizes, colours, and configurations.



  • Ball casters don’t come in a dual configuration;
  • Ball casters can’t carry heavy weight.



Single-wheel castors

Single-wheel casters are one of the most commonly used casters in the market, and for good reason too. Because of their simplistic design, load-bearing capacity, affordability, and functionality, single-wheel casters can be used for a myriad of applications.

These types of casters are mostly used in some kinds of furniture like office chairs, as well as items like shopping trollies and prams. In most cases, single-wheel castors are installed with swivels that make it possible for the casters to turn in every direction.


  • Cheaper than dual casters;
  • Functional and reliable;
  • Adaptable to different terrains.



  • Can’t carry heavy loads;
  • Difficult to swivel under a relatively heavy load;
  • Swivelling wheels are known to get jammed or scrub the floor.



Both types of castors have their pros and cons, choosing the right one is a matter of knowing what you need to get out of it! If you’d like more assistance with choosing the right castor for your specific needs, don’t hesitate to get in touch with us today!

The process of installing a Hillaldam industrial door

Industrial Hillaldam sliding doors are strong, sturdy, and durable heavy sliding doors that can offer your establishment with much needed security and protection against the elements, as well as a convenient way for your employees and vehicles to quickly enter and exit your building. 

Installing an industrial Hillaldam sliding door is a task that should only be performed by trained professionals, but for the sake of curiosity, we’ve decided to give a quick general guide to installing sliding doors.


Pre-installation handling

ü Your sliding door should never be exposed to any rainy, damp or wet conditions. Keep your door in a dry area until it is installed.

ü If you’re using wood as the primary material for your industrial door, we recommend that you allow it to adjust to the room’s temperature before installing it, especially if it’s an internal industrial door. Leave it out for about 2-3 days before installation in whichever area you plan on installing it in.

ü Industrial doors should be stored in areas with good ventilation. They should be positioned horizontally with at least 3 supports that are a minimum of 75mm from the floor. The door should never be exposed to natural elements prior to installation.



No matter how you look at it, you’ll need seasoned professionals to properly fit and install your industrial Hillaldam door. While you’re doing that though, you can continue reading to get a better idea of how your contractors should get the job done. Get in touch with us today to get started!

- We recommend that your contractor allows a maximum of 5mm bottom clearance and 3mm side and top clearance.

- We recommend that you seal all of the door’s edges after trimming to ensure the best possible safety.



Installing a Hillaladam industrial door is no easy task, which more than reason enough for you to let the pros handle it. Here at Castor King, you’ll have everything you need to successfully install your industrial doors. Get in touch with us today to get started.

The Different Types of Castors

Portability is one of the most overlooked, yet essential aspects of any modern-day workplace. From cordless tools and equipment to conveyor systems and trucks, being able to transport different things between different areas of your workplace is invaluable.

This ability saves you time and money while contributing towards workplace safety. One of the best ways to achieve this mobility is by using quality castors. In this blog, we’re going to take a quick look at what castors are, as well as 4 different kinds of castors available to you on the market – let’s roll!


What are castor wheels?

Basically, a castor is a small-to-medium wheel that is installed on an object, such as a box or cart, to rant that object easier mobility. Castors are separated into two categories: swivel and rigid.

Swivel castors are designed to be able to rotate 360 degrees, making it ideal for moving heavy loads in warehouses and other material-handling tasks. On the other hand, rigid castors can’t rotate, they can only move forward and backward.

Because rigid castors don’t have maximum mobility, they’re typically used for medical equipment, institutional equipment and other carts that don’t need to be moved around a lot.


4 different types of castors:


Stem Castors 

These are an assembly with a wheel (or several) wheels mounted onto a fork and feature a stem that is used for attaching the assembly to the bottom of an object. The stem is what sets this type of castor aside from its counterparts.

Stem castors provide mobility to otherwise stationary items and are typically made with polyurethane, as well as soft rubber castor wheels which cannot scratch or dent floors.


Plate Castors

These types of castors contain a wheel/compound wheel and feature a plate on top for easy mounting. These castors have the power to hold more weight than stem mount castors. As a result, plate castors are best used in material-handling applications to transport different kinds of loads.


Levelling Castors

These castors are designed for convenient moving of objects, as well as for level setting machines. They can be used for several applications and can be attached to chairs, vacuum cleaners, and repair carts; what sets them apart is their easy mounting and demounting which allows for your object to instantly become stationary again.


Pneumatic and Solid Rubber Castors

Last but not least, these castors are made from materials that allow for low-speed mobility and are best used when transporting fragile and delicate cargo. These types of castors are designed to protect fragile items by providing a cushioned, shock-absorbing ride.

Castors with pneumatic wheels are usually the ideal choice for outdoor applications over rough surfaces like gravel and grass.


If you’d like to learn more about castors and their near limitless applications, please don’t hesitate to get in touch with us today – we look forward to hearing from you!

How do ball units work?

In a nutshell, Alwayse Ball Transfer Units are omnidirectional load-bearing spherical balls which are designed to handle different kinds of materials. These devices are a type of conveyor system that allow materials to be quickly transported across an array of units known as ball transfer tables.

Ball units are esoteric devices that have significant applications in the commercial and industrial sectors. In this blog, we’re going to take a quick look at how these machines work and why you may want to consider investing in a few of them for your workshop.


5 Benefits of a Manual stacker

Castor King incorporates the highest standard of mobility, lifting, transport and access capabilities.

Manual stackers are predominantly used to provide lifting capacities and mechanisms to lift loads and to centre the heights. The stackers available from Castor King are versatile enough to be operated in confined and congested spaces as well as industrial contexts.


Professionally designed and manufactured Castors

Castor King designs and manufactures niche solutions that can be integrated into a multitude of operational and industrial industries.

Castors are manufactured with the intention to support loads for transportation across industrial floors and factories. The wheeled device is mounted and attached to a larger object which then enables effective movement.


What are Castor wheels used for?

Castor King is an industry specialist in supplying and manufacturing the highest calibre of castors, wheels, trolleys, lifting, ladders, and drum handling equipment, scaffolding, aluminium ball units, borkey express skates, conveyors and storage solutions.

We streamline the operational and project requirements that enhance aspects such as mobility, lifting, transportation and access.


The difference between Pallet Trucks and Stackers

Pallet trucks and stackers have a similar purpose, but their abilities vary. The purpose of each of these items is to move warehouse pallets from one place to another, the difference comes in with regards to the height that they can lift these pallets. Below are the differences between pallet trucks and stackers:


Why you should use Castor King

Castor King is a Cape Town based company with 3 branches in the area. We are focused on providing you products in the categories of mobility, lifting, transport and access. Castor King places emphasis on our ability to give you great deals and quality service. Here’s why you should use Castor King:


What makes us the best Castor Supplier in Cape Town?

Castor suppliers in Cape Town are plenty, but how can you be sure that Castor King is the best in Cape Town? There are many elements that set one brand apart from another, from their product offering to price and overall appeal of the brand itself. With a brand like Castor King, their reputation precedes them. This is a brand known for high grade products that can stand up to the task at hand.


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