In some manufacturing enterprises, as the number of pieces of equipment continues to grow, the variety of caster models has become increasingly complex.

Workshop A uses one type of caster, while Workshop B uses another; newly purchased equipment is fitted with yet another model. Over time, the warehouse may end up storing numerous casters that look similar but differ in specifications.

It wasn’t until the equipment needed maintenance that a problem was discovered:

Even though there are plenty of casters in the warehouse, you may not always be able to find the one that’s truly the right fit.

At this point, companies should move beyond simply purchasing casters and instead establish a more robust, standardized approach to managing caster spare parts.

I. Why are there so many caster models?

Many companies do not procure casters through a centralized purchasing process.

Different devices are supplied by various vendors, and equipment designers have differing selection preferences; moreover, maintenance personnel may independently procure replacement parts based on site-specific conditions.

Each individual purchase may seem justified, but over time, this can easily lead to a proliferation of product variants.

In particular, some casters with similar appearances may differ only in certain structural features or functions, yet they are registered as distinct materials.

A wide variety of models does not necessarily mean greater choice; it may also indicate a lack of unified management standards.

II. Standardization does not mean requiring all equipment to use the same type of casters.

When it comes to standardization, some people assume it simply means adopting a single model across the entire factory.

In fact, this understanding is overly simplistic.

The weight, mobility, operating environment, and functional requirements of different devices can vary significantly; imposing a one-size-fits-all approach may actually hinder their usability.

Reasonable standardization should be:

On the premise of meeting actual operating conditions, equipment with identical requirements should, wherever possible, adopt validated, standardized configurations.

For example, if pallet trucks of the same type are used under similar conditions, it is possible to assess whether to standardize their casters’ series and specifications.

However, for specialized equipment, dedicated models must still be retained.

The goal of standardization is not to have as few models as possible, but to reduce unnecessary variations among models.

3. Casters that look identical may not be interchangeable.

This is the most common misconception in spare parts management.

Although two casters look similar and have nearly identical wheel sizes, that doesn’t mean they can be used interchangeably.

In addition to the basic dimensions, it is also necessary to verify the overall structure, functional configuration, connection interfaces, and the operational performance required by the device.

Even if the mounting interface is compatible, it does not guarantee that the replacement will not interfere with the frame, fairings, or other components.

Therefore, compatibility verification must be completed before establishing a common spare parts list.

You can’t simply classify two casters as the same model just because they look “similar.”

IV. Establishing a Spare Parts Archive for Casters: What Should Be Recorded?

A practical spare-parts inventory should include more than just product names and purchase prices.

More importantly, it enables maintenance personnel to make quick assessments:

What are the specifications of this caster? What functions does it offer? Which equipment is it suitable for? Are there any clearly defined replacement models?

It is recommended to maintain a centralized record of product drawings or photographs, key technical specifications, applicable equipment, procurement model numbers, and replacement considerations.

For models that have been verified as interchangeable, corresponding relationships can also be established.

This way, even if the original procurement staff leaves, subsequent maintenance work will not need to be re-verified from scratch.

A truly valuable spare-parts archive is one that others can use correctly after obtaining it.

V. When procuring new equipment, spare parts should be considered in a unified manner.

Many companies only start considering the availability of casters when their equipment breaks down.

However, the more appropriate time is actually during the design and procurement phases of new equipment.

If a company has already established a list of commonly used casters, new equipment can prioritize evaluating existing standard models, provided they meet the operational requirements.

When it is indeed necessary to introduce a new model, the specific technical rationale for the addition should be clearly specified.

This helps prevent the continuous proliferation of equipment and the endless expansion of spare parts inventory.

Of course, standardization cannot replace technical evaluation, nor should it compromise the equipment’s normal operational requirements in the pursuit of model uniformity.

6. After standardization, the maintenance process will also become clearer.

Once caster models, applicable equipment, and replacement relationships are all centrally managed, maintenance personnel no longer need to rely on experience to locate parts each time.

Warehouses can manage inventory using a unified material coding system, enabling procurement staff to more accurately identify requirements and allowing equipment managers to determine which casters are standard configurations and which are specialized spare parts.

If a particular caster repeatedly exhibits abnormalities, its usage can also be tracked based on its model and the equipment’s maintenance records.

This means that caster standardization is not only a procurement issue but is also closely linked to equipment management, warehousing, and maintenance processes.

VII. Where is the most practical place to start?

For factories that already have a large number of pieces of equipment, it is not necessary to require all casters to be standardized right from the start.

A more practical approach is to first inventory the equipment in highest use, compile a list of existing caster models, and then categorize them based on operating conditions and structural requirements.

Subsequently, standardized models were identified, and through technical validation and practical testing, a standard spare-parts inventory was gradually established.

The original special‑type models shall retain the necessary management records.

First organize, then verify, and finally standardize—this approach is far more prudent than undertaking a large-scale replacement outright.

Written at the end

Although casters are merely a component at the base of equipment, when a factory operates a large number of mobile units, they cease to be a standalone procurement item.

Whether models are standardized, documentation is complete, and replacement relationships are clearly defined all impact an enterprise’s subsequent equipment management.

The true goal of standardizing caster spare parts is not to keep the warehouse neatly organized, but to ensure that every procurement and repair is based on clear, well-defined criteria.

Good standardization doesn’t mean equipping every piece of equipment with the same casters; rather, it means providing a unified solution for identical needs and clearly justifying any special requirements.