The RM-Light series is the entry tier of the RollMaster load ladder, rated up to 150 kg per caster. It sits below the RM-Medium (150-500 kg), RM-Heavy (500-1500 kg) and RM-Extreme (1500 kg+) series, so a product family can stay with one manufacturer as its load rating climbs — the ladder is the owner load-series table behind every load statement on this site.
Construction matches the class the series serves: stamped steel housings and wheels in polypropylene (PP), cast nylon (PA6), thermoplastic rubber (TPR) or solid rubber. Those four wheel options are what the class trades capacity for — quiet rolling, floor protection on hardwood, tile and carpet, easy swivel force and low unit cost — and the series keeps all of them open so the wheel is chosen for the floor, not defaulted.
Typical RM-Light duty: office and residential furniture, retail displays, small utility carts, bins and light racks — loads light enough to move by hand, floors smooth enough not to fight a small wheel. Per-configuration load ratings are confirmed at quotation, never assumed from the class table.
Process Overview
A light duty caster is the entry tier of industrial rolling: loads up to 150 kg per caster on stamped steel housings, where the wheel - polypropylene, cast nylon PA6, thermoplastic rubber or solid rubber - is chosen for the floor it rolls on rather than for the load. The RM-Light series keeps all four wheel options open so quiet rolling and floor protection on hardwood, tile and carpet are a selection, not a trade-off imposed by the range.
Selection works down the load ladder, not up from the furniture aisle: the series sits below the RM-Medium band, so when the per-caster figure outgrows the class the ladder steps up within one manufacturer's line instead of switching suppliers - and the rating for a specific wheel, mounting and floor combination is confirmed at quotation, never assumed from the class.
Casters by Load Range
| Series | Load per caster | Typical wheel options | Best for |
|---|---|---|---|
| RM-Light | up to 150 kg | Nylon, rubber, elastic | Light trolleys, medical and display carts |
| RM-Medium | 150–500 kg | Polyurethane, nylon | Warehouse carts, racks, AGV/AMR platforms |
| RM-Heavy | 500–1500 kg | Polyurethane on steel, forged steel | Die carts, machinery moving, heavy trolleys |
| RM-Extreme | 1500 kg and up | Forged steel, double wheel | Steel mills, ovens, extreme-load skates |
Specifications
- Load capacity up to 150 kg per caster (owner load-series table; count 3 of 4 casters at full load for uneven-floor safety)
- Wheel options in polypropylene (PP), cast nylon (PA6), TPR and solid rubber
- Stamped steel housings — the class-standard construction for light loads
- Stem and top-plate mounting options matched to furniture leg and rack construction
- Quiet-roll and floor-protecting wheel compounds for finished floors
- Standard lead time 15-20 days (custom configurations 30-40 days); MOQ depends on tooling — standard catalog items ship in small quantities
Typical materials
Polypropylene (PP), cast nylon (PA6), thermoplastic rubber (TPR), solid rubber
| Wheel material | Typical hardness | Floor protection | Where it fits |
|---|---|---|---|
| Cast polyurethane (PU) | Shore A 92–95 | Very good: non-marking compounds | AGV/AMR, trolleys on painted or epoxy floors, heavy duty |
| Injected PU | Shore A 90–95 | Good | Cost-sensitive medium duty, light equipment |
| Cast nylon (PA6) | Shore D 70+ | Fair: hard tread | High load, dry indoor logistics, washdown |
| Glass-filled nylon | Shore D 75+ | Fair | Higher loads and temperatures than PA6 |
| Solid rubber | Shore A 65–75 | Good | Shock absorption, outdoor thresholds, economy |
| Super-elastic rubber | Shore A 55–65 | Excellent | Quiet running: medical, hotel, laboratory |
| Phenolic resin | — | Fair | Baking lines and ovens up to +280 °C |
| Forged steel | — | None: needs steel plate or heavy concrete | Extreme loads, heat, harsh floors |
| Stainless (wheel/bracket) | — | Good | Food, pharma, washdown, corrosive areas |
Finishes
Zinc plating, chrome plating or powder coating (line-wide surface treatments)
| Bracket finish | What it does | Specify it when |
|---|---|---|
| Zinc plating (blue/white) | Baseline corrosion protection | Standard dry indoor use |
| Chrome plating | Hard, decorative, easy to clean | Visible / cleanroom-adjacent equipment |
| Powder coating | Custom color, good corrosion resistance | Brand colors, outdoor-adjacent use |
| Stainless steel 304 | No plating to fail | Washdown, food, medical |
| Stainless steel 316 | Resists chlorides | Salt, brine, marine air, harsh cleaning chemicals |
Testing
Per-configuration load ratings confirmed at quotation; the series band is the owner load-series table, not a per-SKU measured value
| Selection factor | Rule of thumb | Effect on performance |
|---|---|---|
| Load sizing | Total load ÷ 3 (not ÷ 4) | On uneven floors only three wheels carry the cart |
| Wheel diameter | Bigger rolls easier | Larger wheels cut push force and bridge gaps |
| Tread hardness | Softer = quieter, harder = easier rolling | Pick the softest tread that carries the load |
| Bearing choice | Precision ball for manual pushing, roller for heavy loads | Bearings dominate rolling resistance at high load |
| Swivel vs rigid | 2 swivel + 2 rigid is the standard cart setup | All-swivel carts wander; all-rigid carts cannot steer |
| Floor condition | Rough floors need bigger wheels and softer treads | Small hard wheels on bad floors destroy both |
Surface Finish Reference
- Truck lock is zinc-plated, blue-passivated, Cr6-free.
- Guardrail systems must be smooth-surfaced.
- Connectors must have a corrosion-resistant finish.
- Stair rail systems must be smooth-surfaced.
- Surface roughness of Ra 0.8 µm or lower is specified for sealing, sliding, fatigue, or cleanliness mechanisms.
Materials We Machine
- Cast Iron/Steel
- Nylon
- PP
- Plastic
- aluminum
Common Applications
- Assembly Line
- Furniture
- Home Furnishings
- Lightweight Equipment
- Office Equipment
- Office Scenarios
- custom projects
- residential items
- Hospital
- Material Handling
RM series comparison
| Series | Load per caster | Typical wheel materials | Temperature range |
|---|---|---|---|
| RM-Light (this series) | Up to 150 kg/caster | Polypropylene (PP), Cast nylon (PA6), TPR, Solid rubber | - |
| RM-Medium | 150–500 kg/caster | Polyurethane (PU) on steel core, Cast nylon (PA6), Steel | −20…+80 °C (std PU); −40…+120 °C (special PU) |
| RM-Heavy | 500–1500 kg/caster | Polyurethane (PU) on steel core, Cast nylon (PA6), Forged steel / pressed steel | −20…+80 °C (std PU); −40…+120 °C (special PU) |
| RM-Extreme | 1500 kg+/caster (family line specified to 2000 kg) | Forged steel | −20…+80 °C (std PU); −40…+120 °C (special PU) |
| RM-Hot | - | High-temp nylon, Phenolic resin, Cast iron, Forged steel | +120…+280 °C (tread options) |
Ordering, Lead Times & MOQ
Standard catalog items in small quantities; custom MOQ depends on tooling.
Standard lead time 15-30 days; samples faster.
Business models: OEM manufacturing, ODM design, private labelling, standard catalog sales, replacement parts supply.
Frequently asked questions
Is the RM-Light series the same as a light duty caster?
Labels vary across the industry, so compare by load rating, not by name. On this site the RM-Light series is the owner-declared band rated up to 150 kg per caster, covering the class most publishers call light duty (published guides draw it at 10-150 kg per wheel). When replacing casters, match the load rating and mounting interface first and treat the series name as shorthand.
How do I size RM-Light casters for my cart?
Divide the total load — cart weight plus payload — by 3, not by 4: on uneven floors only three wheels touch the ground at once. Keep the result comfortably under the 150 kg band. If the floor is rough, the cart crosses thresholds, or the duty is constant, the stamped light construction pays for its savings in flat spots and loosened swivels — step up to the RM-Medium series (150-500 kg) rather than to the top of this band.
Which wheel material suits which floor?
TPR and solid rubber are the quiet choices and the gentlest on hardwood, tile and carpet; PP and PA6 roll easier, clean easier and resist debris, which suits workshops, kitchens and retail back-of-house. For wet or caustic environments, state the chemicals — the compound, not the housing, is what the floor chemistry attacks, and it is confirmed with the quotation.
What should an RM-Light RFQ include?
Load per caster, wheel diameter and material (PP, PA6, TPR or rubber), mounting style with dimensions (stem diameter and length, grip ring or threaded, or plate and bolt pattern), brake or locking needs, floor type, appearance or noise expectations, and quantity. Standard lead time is 15-20 days (custom configurations 30-40 days). MOQ depends on tooling — standard catalog items ship in small quantities — and samples are freight collect and refundable on a bulk order.
How do I calculate the required caster load capacity?
Total load = cart weight + payload. Divide by 3 (not 4) to stay safe on uneven floors. Add margin for speed, shock and rough floors.
What is the typical lead time?
Standard lead time 15-30 days. Samples faster than bulk orders. Confirmed at quotation.
What is the minimum order quantity?
Standard catalog items in small quantities. Custom casters depend on tooling. OEM/ODM/private label programs welcome.
What certifications do you hold?
ISO 9001 certified quality management. Load ratings based on EN 12530 testing protocols. In-house salt spray and dynamic load testing.
Can you manufacture under our brand?
OEM manufacturing, ODM design, private labelling. Custom brackets, compounds, colors and packaging. Samples then pilot then mass production.
Sources · 4
- promovecaster.comUnclassified source
- techincastor.comManufacturer technical documentation
- thecasterguy.comIndustry publication
- globe-caster.comIndustry peer technical page
Technical references cited for verifiability — not supplier recommendations.Browse the research library.
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Capability commitments on this page are owner-confirmed (2026-09-29).