Buy Stem Castors Online in Australia
Stem Castor Selection — Quick Reference (AS 4380)
Stem castors — THREADED + GRIP-RING + EXPANDING-ADAPTOR STEM mount castors. Trolleys + bins + chair + office furniture + equipment. Stem fits INTO socket / hole in workpiece — different from plate castor (bolt-through plate).
| Stem Castor Type | Best For |
|---|---|
| Threaded Stem (Workshop) | Workshop standard — bolt + nut |
| Grip-Ring Stem | Quick-attach without thread |
| Expanding Adaptor | Tube + hollow leg attach |
| Light-Duty (30-60kg) | Chair + light trolley |
| Medium-Duty (60-150kg) | Workshop trolley |
| Heavy-Duty (150-300kg+) | Industrial + warehouse |
| Swivel / Fixed / Brake | Match application |
| Match Stem Diameter + Thread | Critical for fit |
Critical: Match STEM DIAMETER + THREAD precisely — workshop loading. De-rate 25% for uneven loads. Brands: Easyroll, Colson. Companion: castors + wheels, plate castors, material handling.
Stem Castors and Furniture Castors for Australian Workshop and Equipment Use
Stem castors mount via a stem (a vertical shaft) that fits into a hole in the equipment frame — a different mounting style from plate castors which bolt to a flat surface. The stem mount suits furniture, light equipment, retail fixtures, and applications where a flat plate mount isn't practical. AIMS Industrial supplies stem castors in the styles and sizes Australian trade and industrial users actually need, from EasyRoll and Colson.
The stem castor types we stock
- Threaded stem castors — male-threaded stem that screws into a tapped hole in the frame; the standard fit for industrial furniture
- Socket stem castors — straight stem that press-fits into a socket fitting in the frame
- Grip-ring (grip-neck) stem castors — friction-grip stem with a retaining ring; quick-fit without threading
- Expanding-rubber stem castors — stem with a rubber sleeve that compresses to grip the inside of tube frames
- Plug-in stem castors — for pre-fitted socket installations
Where stem castors earn their place
- Furniture and chairs — office chairs, mobile furniture, modular workstations
- Light equipment — small workshop trolleys, retail fixtures, display stands
- Tube-frame trolleys — where expanding-rubber stem castors fit cleanly into the tube
- Retail and hospitality fixtures — shelving units, display stands, food service equipment
- Light medical and laboratory equipment — instrument trolleys, mobile work stations
Stem castor versus plate castor — which mounting
Plate castors bolt to a flat surface with multiple bolts — stronger mounting, suit heavier equipment. Stem castors mount through a single hole — simpler mounting, lower load capacity, suit lighter equipment. For trolleys and equipment over 100-150kg per castor, plate castors are the right choice; for lighter applications, stem castors are easier to install and suit furniture-style frames better.
Wheel materials — match to floor and load
- Polyurethane (PU) — quiet, easy on smooth concrete, doesn't mark floors; the workshop favourite
- Solid rubber — quiet, suits rough or uneven surfaces, good shock absorption
- Nylon — hard, fast, handles oil and chemicals; transmits noise and shock
- Soft rubber (TPR) — for retail and hospitality where quiet operation matters
Sizing and load capacity
Stem castor capacity is typically 30-100kg per castor depending on wheel diameter and stem strength. Common wheel sizes range from 50mm through 125mm. Stem dimensions vary by application: M8, M10, M12 threads are common for threaded stems; 7/16 inch and 5/8 inch grip-ring sizes are common for grip-stem applications. Match the stem size to the existing equipment frame.
Brands stocked at AIMS
EasyRoll and Colson cover the stem castor range across the everyday workshop sizes and capacities. Replacement wheels, bearings, and stems are stocked alongside complete castors so equipment can be repaired rather than replaced when only the wheel has worn.
Companion ranges at AIMS
Stem castors sit alongside our broader castor and wheel range — see plate castors, pneumatic and flat-free wheels, replacement tyres and tubes, and castors and wheels for the broader range.
Need help speccing stem castors for furniture, equipment, or specific frame mounting? contact our team — we'll match by load, wheel material, stem type, and dimensions.
People Also Ask — Stem Castors
Q: What's the difference between a threaded stem castor and a grip-ring stem castor?
A threaded stem castor has a male-threaded stem that screws into a tapped hole in the equipment frame — the standard fit for industrial furniture where the frame has (or can have) a threaded socket. A grip-ring (grip-neck) stem castor instead has a friction-grip stem held by a retaining ring, giving a quick-fit installation without threading — useful where the frame hole isn't threaded or where castors need to be swapped without re-tapping. Match the stem type to how the existing frame is set up rather than assuming one type fits any hole.
Q: How do I match a stem castor's diameter and thread to my equipment?
Stem dimensions have to match the existing frame precisely — common threaded stem sizes are M8, M10 and M12, while grip-ring stems commonly come in 7/16 inch and 5/8 inch. Getting this wrong means the castor either won't seat properly or will be loose in the socket, so measure the existing stem or socket before ordering a replacement rather than matching by the castor's load rating alone.
Q: What's a socket stem castor, and how is it different from a plug-in stem castor?
A socket stem castor has a straight stem that press-fits into a socket fitting already in the equipment frame — the socket does the retaining, not a thread or grip-ring. A plug-in stem castor is built for pre-fitted socket installations where the frame already carries a matching socket mount, essentially matching the original equipment fitting rather than a generic hole. Both rely on a purpose-fitted socket rather than a tapped connection or a friction-grip stem, so they're not a drop-in swap for a threaded or grip-ring castor.
Q: What's an expanding-rubber stem castor used for?
An expanding-rubber stem castor has a rubber sleeve on the stem that compresses to grip the inside of a hollow tube-frame leg, rather than screwing into a tapped hole or press-fitting into a socket. It's the right choice for tube-frame trolleys and similar equipment where the frame leg is a hollow tube rather than a solid section with a drilled or tapped mounting point — the expanding action grips inside the tube itself.
Q: What load can a stem castor typically carry?
Stem castors are generally rated from around 30kg up to 100kg per castor, depending on wheel diameter (common sizes run 50mm to 125mm) and the strength of the stem itself. This makes them suited to furniture, chairs, light trolleys and retail fixtures rather than heavy workshop or warehouse equipment — for loads regularly exceeding 100-150kg per castor, a plate-mounted castor is the more appropriate choice.