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Factory Sale Square expanding stem casters

5.0 (6 reviews)



Product Name:Factory Sale Square expanding stem casters

Square expanding stem casters
Material: PP core with TPR wheel
Size:Ø75 x 22mm ; Ø100 x 30mm
Load Capacity:45kg,60kg
Bearing:Ball Bearing

Caster No. Wheel Material Bearing Thread Height Loading
P90ES-3 75 x 22 PP + TPR Ball Bearing 21~30 118 40 kg
P90ES-4 100 x 30 PP + TPR Ball Bearing 21~30 153 60 kg



Today I would like to share some information with you about the expansion stem caster. Expansion stems come in various different sizes and are used to fit up into hallow tubing usually on tables or chairs. Expansion stems can have more versatility compared to using a friction ring caster and a socket with the reason being, one expansion stem can fit tubing within a certain range of sizes and a round expansion stem can fit up into round and square tubing.

An expansion stem caster is a long stem caster that has threading at the top that is then covered with a rubber expansion grip that goes around the stem. The expansion stem consists of 3 parts, the plastic sleeve(spacer), the rubber sleeve(expansion) and the round nut. The nut is the gripping mechanism which allows the rubber sleeve to be compressed thus expanding its diameter to fit into the tubing snugly.

In order to make your expansion stem fit properly, while holding the swivel bearing at the top of the caster, you want to turn the round nut at the top of the stem clockwise. This will start to tighten which will start to compress and expand the rubber sleeve. Continue to tighten the nut until you expand the rubber sleeve enough to have a very snug fit going up into your tubing. Insert the stem all the way up into your tubing. Once the stem is up in your tubing, turn the swivel bearing counter clockwise to further expand the rubber sleeve inside your tubing. If you need to tighten it further and are struggling to do this by hand, with a wrench, you can turn the hex nut under the swivel bearing counter clockwise until your stem is tight enough for your liking.


For applications in which casters need to be installed on tubular legs, expanding stem casters are a great solution. Expanding stem casters have a long threaded stem, onto which a soft rubber bushing is inserted, along with a hard plastic spacer, and special threaded nut. The 3-piece assembly of spacer, bushing, and nut is known as an expanding stem kit. Installed on a threaded stem, you can tighten the nut to compress the rubber bushing, causing it to expand to a larger diameter.


Expanding stem kits for casters come in a range of sizes from ?” diameter to 1-?” diameter. They generally expand from those starting diameters about 1/16″ to 1/8″ in diameter (i.e. a ?” expanding stem will expand to 7/8″).


They are very easy to use and install. First you must make sure to get the closest size kit to the inside diameter of the leg into which they will be installed, without going over size. In the image below, the inside diameter of the tubing was about 15/16″ so we used a 7/8″ diameter expanding stem kit.


Next, we just tighten the top nut on the stem, compressing and expanding the rubber bushing until it fits snugly into the tubing.


Once the caster has been completely inserted, the last step is to add about a half turn to the hex nut located on the underside of the swivel raceway. If the rubber bushing was snug already, then it should actually grip the inside of the leg enough to where turning this hex head will expanding the stem just a little more.

Expanding stem casters will work on both round and square tubing, making them an suitable solution for many applications. They are available with wheel sizes ranging from 3″ diameter to 6″ diameter and have a variety of brake and total lock options as well.

Popular applications include stainless steel industrial kitchen tables and other commercial kitchen equipment, wire shelving and carts, and custom built tables.


What are expanding stem casters?
Expansion stem casters are designed to mount casters into open tubing fixtures. Turning of hex nut beneath the lower raceway on the caster expands the rubber adapter inside of the round or square tubing for a tight fit.

How do you attach casters to square metal legs?
Image result for Square expanding stem casters
For easy installation, simply drill the hole into your table leg, apply the threaded insert, and screw in your caster. If you opt for a metal table leg, we can apply/install the threaded insert for you, so all you have to do is apply your caster when it arrives.

How are stem casters measured?
Image result for Square expanding stem casters
Measuring the length is a little simpler. Use your ruler to measure the length of the stem from the top of the flared base to the tip of the stem. The caster stem on the right is 7/8″ long.

How do you find the diameter of a stem?
Measure the circumference of the tree (photo) in order to calculate the diameter. Large plants and trees: To measure the diameter of a large plant we measure the circumference of the stem or trunk. The circumference is then converted to diameter (Figure 2).

6 reviews for Factory Sale Square expanding stem casters

  1. admin

    Factory Sale Square expanding stem casters

  2. admin

    Once you replace the cheap, commodity casters on your hospital carts, mobile workstations and IV poles, you’ll start seeing some noticeable improvements throughout your facility.

    For one thing, you’ll see noise levels caused by casters significantly drop. Your staff will report that your equipment is up to 50% easier to push and pull. You will see your floor maintenance costs drop as your staff start spending less time and fewer resources removing marks and repairing damaged floors. Finally, you can expect to see patient satisfaction improve, as evidenced by improved HCAHPS scores.

    Your hospital can’t treat patients until your staff first diagnose their ailments. Diagnosis always precedes cure. If you’ve read this far, you now know the top-four pains that you are likely experiencing because of commodity casters in your hospital. Now you are in a position to prescribe a cure.

    Incidentally, your cure can start today with a complimentary consultation with the team at Caster Connection. We take a consultative approach to solving the problems caused by inferior casters.

  3. admin

    The cure for these top-four pains caused by commodity hospital casters is better, hospital-designed casters. If your casters are too noisy, hard to move or costly to maintain, or if they are damaging your floors, look for the following qualities in your replacement casters.
    High-quality wheel material such as polyurethane: These wheels store and exude energy to reduce noise-causing vibrations, and deliver a smooth and quiet ride.
    Wheels with a debris-rejecting quality: Wheels made from durable polyurethane are soft enough to be quiet but hard enough that the tread doesn’t mark floors or retain debris.
    Long swivel lead: These make carts much easier to push, pull, turn, maneuver into place and stop.
    Bearings: Casters with bearings are quieter, easier to maneuver and last longer.

  4. admin

    How much weight can plastic casters hold?
    Image result for plastic casters
    Casters come in three weight ranges. Light duty casters are for loads of up to 500 lbs. Medium duty casters are for weights of between 501 and 2,000 lbs. And heavy duty casters are for weights of more than 2,000 lbs.

    What are the two types of casters?
    Image result for plastic casters
    When considering maneuverability, there are two basic kinds of caster: rigid casters and swivel casters.
    A rigid caster, also known as a fixed caster, is only able to roll forward and backward.
    A swivel caster has a raceway that allows the wheel to turn.

  5. admin

    What type of casters are best?
    Image result for plastic casters

    Soft Rubber wheels are a good choice for light average loads, with occasional full capacity loads. Soft Rubber wheels are manufactured of quality materials with a resilient rubber tread bonded to the hard rubber core.

    Are nylon casters good?
    Image result for plastic casters
    If the objects you are seeking casters for are not too heavy, then nylon casters are probably the safest choice. Nylon casters are typically smooth and non-abrasive and are usually installed ‘ready polished’ so they will not cause any issues with your hardwood flooring.

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