There are many different aspects to consider when choosing a caster and one of the least considered when a stem caster is needed is the stem size. People seem to think that one stem is the same as any other, so little thought is given to the importance of this feature of the caster. If you are looking for a stem caster that will function properly and last a long time you will want to understand how the stem can affect the reliability of the caster.
At Douglas Equipment we know that there are many different characteristics of a caster and each one is important to ensure that the caster will install properly, function well and last as long as you need it. When it comes to the stem of a caster there are many things to consider; will this replace an existing caster, what dynamic load will the caster hold, what other factors will affect the stem of the caster.
We don’t expect everyone to know and understand all of these issues, so our team of expert service people is here to help answer your questions. Here are a few things we would consider when we talk through your unique caster usage needs:
What if the caster stem is the wrong length?
There are obviously two aspects to this question, assuming you are not able to change the size of the hole that the caster stem will be inserted into. First, if the caster stem is too long then the caster could seat with threads exposed. This situation often leads to uneven loading, excess stress and early caster failure.
Alternately, a caster stem that is too short may not have enough engagement into the hole to react to the stresses that are applied when the object is in motion. This can also put uneven stresses on the caster stem that can lead to early failure.
What if the caster stem is the wrong diameter?
If the caster stem is too large the problem becomes easy to see; the stem will not fit into the hole as it is intended. If this is a replacement caster you may not be able to adjust the hole to a larger size. And even if this is possible, it may not be easy to ensure that the hole is properly centered during this rework.
On the other hand, if the caster stem is too narrow you may input loads that are too large for the material of the stem to handle at the smaller thickness, which will lead to catastrophic failure of the caster stem. The stem chosen can easily affect the maximum allowable load limit of a caster for just this reason.
What are some stem caster model examples?
Douglas Equipment has access to caster stems from more than a dozen top quality caster manufacturers, so we are sure to have one that will suit your requirements. Here are a few examples of some of the stem caster models we can match to your unique needs:
- Bestway SSRT/SSRTR Series Stainless Steel casters: This stemmed caster from Bestway is a stainless steel design and can have various stems installed. The caster offers top quality construction and performance with heavy stainless steel material construction. Wheels are either 1 ½ “ or 2” wide with diameters of 3”, 4”, 5”, 6” and 8” and come in various wheel materials including Phenolic, Urethane on aluminum, Solid Elastomer, Elastiglide and White Nylon. While customer stem sizes are available the standard stem sizes include ¾” by 4” to 1 3/8” by 4” plain stems and ¾” by 2” to 1” by 4” threaded stems. Maximum load capacity depending on stem is 700 pounds.
- Faultless Scaffold Casters IC1400 & CF 1400: These casters are specifically designed for scaffolds and include Mold-on rubber wheels with roller bearings, lubrication fittings and a brake lever arm which can be hand or foot operated. The CF model is a more rugged caster with a heavy duty forged steel top plate with integrally forged stem and king-pin. Both have a corrosion resistant zinc finish. Wheels are 2” wide and 8” diameter. Maximum load capacities are 500 pounds (IC 1400) and 750 pounds (CF 1400).
- Rhombus 357h Heavy Apparatus and Equipment Caster: Designed to work with ease this solid and robust caster is designed for applications like cooking equipment, food dispensers and other appliances. With a sheet steel construction that is zinc plated this caster looks good and has excellent performance provided by a double ball race swivel bearing. The caster also includes a directional brake as an option, and has capacities up to 130 Kg.
Get Help Choosing Stem Casters
Along with consideration of stem size you may also need to consider if you need the stem to be threaded or not, if the caster needs a spring to cushion the impact of a load, if a brake needs to be installed on the caster and what type of wheel will suit your needs. Many different decisions go into choosing the right caster for the job, and we are here to help.
Douglas Equipment has been in the business of quality casters for almost 60 years and our dedicated service team is here to help you with any questions you may have when it comes to stem casters or any other caster needs you may have.
Whether you need answers to a few quick questions or need guidance during the selection process our experts are here to help and getting in touch is simple.
