Medical Plastic Casters: ACMC, ACMCT, ACMCH

Posted by Kyle Kim on Oct 27th 2026

Three series, thirty casters

Carrymaster® offers three plastic caster series whose product pages list the application as "Hospital Bed, Medical Devices, Light Load of Trolley & Carts": the ACMC, ACMCT and ACMCH. Together they span 30 individual products, all swivel, all rated light-duty, and all available with or without a brake. The three series share the same application language and the same swivel configuration, but they differ in load rating, wheel material, frame material, and available mount types. Choosing the right model means working through those differences systematically.

The series profiles, the full ratings and mounts table, the materials table, and a step-by-step path to a single model number are all covered here. For background on what a medical caster is, how it is constructed, and where medical casters are used across healthcare settings, see the Carrymaster medical caster wheels overview. For standards, braking requirements, and cleanability considerations that apply across the medical line, see the medical caster wheels standards and braking guide. The full medical plastic casters category lists every model with its product drawing and specifications.

Scope note: All 30 products in the Carrymaster medical plastic line are swivel casters. There is no rigid option in this line. The ACMC, ACMCT and ACMCH series each offer a braked version; the braked and unbraked versions of every model carry an identical load rating.

Reading a Carrymaster medical model number

Every Carrymaster medical plastic caster model number encodes four pieces of information: series, size code, mount type, and brake status. Reading the code correctly means you can confirm the right product from a specification sheet or a purchase order without opening a catalog.

The four-part code

The model number is built left to right in this order:

Series: ACMC, ACMCT or ACMCH
Size code: 76, 102 or 127 (corresponds to the wheel-size band and load rating in the ratings table)
Mount type:
- SF swivel flange
- SS swivel stem
- SRS swivel round stem (ACMC 102 and 127 only)
- S swivel (ACMCH only)
Brake suffix: a trailing B indicates the braked version; no suffix means no brake

Example: ACMC-102SFB is the ACMC series, size code 102, swivel flange mount, with brake. ACMCT-127SS is the ACMCT series, size code 127, swivel stem mount, no brake.

The mount-type codes correspond directly to the mounting hardware on the equipment. Flange mounts bolt to a top plate; stem mounts insert into a socket. For a detailed comparison of flange and stem mounting and how to measure for each, see the stem vs. flange caster mount guide.

Note: Dimensions, thread sizes, bolt patterns and caster heights are not covered here. All measurements are on the dimension drawing on each product page.

The ACMC series

The ACMC series accounts for 16 of the 30 Carrymaster medical plastic casters. It is the highest-rated series in the medical plastic line and the only series that offers a round stem mount option.

Size codes and load ratings

The ACMC series spans three size codes, each with a distinct load rating and wheel-size band:

Size code	Capacity (lbs per caster)	Wheel-size band	Mounts available
76	198.42	2 to 3 in	Flange, stem
102	264.55	4 to 5 in	Flange, stem, round stem
127	297.62	Over 5 in	Flange, stem, round stem

The ACMC 127 at 297.62 lbs per caster is the highest rating in the entire Carrymaster medical plastic line. The ACMC 76 at 198.42 lbs per caster is the entry point for the series. All three size codes are available with and without a brake; the braked and unbraked versions carry the same rating.

Frame and wheel materials

The ACMC series uses a polyamide 6 (PA6) frame. Polyamide, the class of engineering polymers that includes nylon, is characterized by the repeating amide linkage in its backbone. The wheel core is polypropylene (PP), a thermoplastic polymer. The tread is Thermo Plastic Rubber (TPR).

Top plate and bolt

The top plate and bolt are SPC and S20C steel, zinc treated.

Mount options

The ACMC series is the only medical plastic series with a round stem option, available on the 102 and 127 size codes only. The 76 size code is available in flange and stem configurations only. All mount types are available with or without the brake suffix B.

The ACMCT series

The ACMCT series accounts for 12 of the 30 Carrymaster medical plastic casters. It spans the same three size codes as the ACMC series but carries lower load ratings at every size code and uses different frame and wheel materials.

Size codes and load ratings

Size code	Capacity (lbs per caster)	Wheel-size band	Mounts available
76	132.28	2 to 3 in	Flange, stem
102	176.37	4 to 5 in	Flange, stem
127	220.46	Over 5 in	Flange, stem

The ACMCT 76 at 132.28 lbs per caster is the lowest rating in the Carrymaster medical plastic line. The ACMCT 127 at 220.46 lbs per caster is the ceiling for this series. All three size codes are available with and without a brake; braked and unbraked versions carry the same rating. No round stem option exists in the ACMCT series.

Frame and wheel materials

The ACMCT series splits into two material sets depending on size code:

ACMCT 76 and 102:

Top plate and bolt: SPC and S20C steel, zinc treated
Frame: Acrylonitrile Butadiene Styrene (ABS), a thermoplastic polymer
Wheel core: ABS
Wheel tread: PA + PU (polyamide combined with polyurethane)

ACMCT 127:

Top plate and bolt: SPC and S20C steel, zinc treated
Frame: Nylon (polyamide)
Wheel core: Nylon
Wheel tread: PA + PU

This internal split is a distinguishing feature of the ACMCT series: the two smaller size codes use an ABS frame and core, while the 127 moves to a nylon frame and core. The wheel tread material, PA + PU, is the same across all three ACMCT size codes and differs from the TPR tread used in the ACMC and ACMCH series.

Mount options

The ACMCT series offers flange and stem mounts across all three size codes. There is no round stem option in this series. All configurations are available with or without the brake suffix B.

The ACMCH series

The ACMCH series is the smallest entry in the Carrymaster medical plastic line, comprising 2 of the 30 products. It is available in a single size code and shares its wheel material with the ACMC series.

Size code and load rating

Size code	Capacity (lbs per caster)	Wheel-size band	Mounts available
127	198.42	Over 5 in	Not stated

The ACMCH 127 is rated at 198.42 lbs per caster, the same rating as the ACMC 76, despite the ACMCH using the larger 127 size code. Both the braked and unbraked versions carry this rating.

Frame and wheel materials

The ACMCH series uses a PA6 frame and a PP wheel core, identical to the ACMC series. The wheel tread is TPR (Thermo Plastic Rubber), also matching the ACMC. The top plate and bolt materials are not listed on the ACMCH product pages.

Mount options

The mount type for the ACMCH is described in the product titles as S (swivel), without a further flange, stem or round stem designation. The specific mounting hardware configuration is not stated on the product pages. Confirm the mount type directly with Zambus before specifying the ACMCH for a new design.

Key difference from ACMC: The ACMCH 127 shares the same wheel materials and frame material as the ACMC series, but its mount type is not specified in the catalogue and its rating (198.42 lbs per caster) is lower than either the ACMC 102 or ACMC 127.

Ratings and mounts side by side

The ratings table reproduces the complete Carrymaster medical plastic caster ratings and mount data. Every capacity figure is stated in lbs per caster. Within every row, the braked and unbraked versions carry the identical rating. Use the Carrymaster casters by wheel size filter to narrow the product list by size band before cross-referencing mounts.

Series	Size code	Capacity lbs/ea	Wheel-size facet	Mounts available (each with and without brake)
ACMC	76	198.42	2 to 3 in	Flange, stem
ACMC	102	264.55	4 to 5 in	Flange, stem, round stem
ACMC	127	297.62	Over 5 in	Flange, stem, round stem
ACMCT	76	132.28	2 to 3 in	Flange, stem
ACMCT	102	176.37	4 to 5 in	Flange, stem
ACMCT	127	220.46	Over 5 in	Flange, stem
ACMCH	127	198.42	Over 5 in	Mount type not stated

What the ratings table shows

Three facts stand out from the ratings table:

At every shared size code, ACMC is rated higher than ACMCT. At size code 76, the difference is 198.42 vs 132.28 lbs per caster. At 102, it is 264.55 vs 176.37. At 127, it is 297.62 vs 220.46.
The ACMC is the only series with a round stem option, available on size codes 102 and 127.
The ACMCH 127 and the ACMC 76 share the same 198.42 lbs per caster rating, despite using different size codes and wheel-size bands.

The ratings table does not cover dimensions, thread sizes, bolt patterns or caster heights. All dimensional data is on the drawing on each individual product page.

Materials side by side

The materials table is reproduced verbatim from the Materials and Treatments block on each Carrymaster medical plastic caster product page. For a full discussion of how caster wheel materials perform across different floor types and applications, see the caster wheel materials guide.

Series	Top plate and bolt	Frame	Wheel core	Wheel
ACMC	SPC and S20C, zinc treated	PA6	PP	TPR (Thermo Plastic Rubber)
ACMCT 76 and 102	SPC and S20C, zinc treated	ABS	ABS	PA + PU
ACMCT 127	SPC and S20C, zinc treated	Nylon	Nylon	PA + PU
ACMCH	Not listed	PA6	PP	TPR (Thermo Plastic Rubber)

What the materials table shows

Three distinctions are visible in the materials table:

ACMC and ACMCH share the same frame material (PA6), wheel core (PP) and wheel tread (TPR). The two series are materially identical in these respects; they differ on load rating, size code availability, mount options and the listed top plate and bolt materials.
ACMCT differs from both on frame, core and tread. The ACMCT 76 and 102 use an ABS frame and core with a PA + PU tread. The ACMCT 127 uses a nylon frame and core, also with a PA + PU tread. No ACMCT model uses TPR.
The ACMCH top plate and bolt materials are not listed on its product pages. This is the only gap in the materials data across the 30-product line.

The materials table does not support performance comparisons between TPR and PA + PU. Any assessment of material suitability for a specific application should be confirmed with the Zambus team before specifying.

Narrowing thirty casters to one

The ratings table and the model-number code together provide a systematic path from a set of equipment requirements to a single Carrymaster model number. Work through the five steps in order.

Step 1: Establish the required rating per caster

Determine the fully loaded weight of the equipment and calculate the required rating per caster for your configuration. The method for that calculation is covered in the caster wheel load capacity guide. The result is the minimum lbs-per-caster figure that must be met or exceeded by the model you select.

Step 2: Match to a series and size code

Use the ratings table to identify every row that meets or exceeds your required rating per caster:

If the required rating is above 220.46 lbs per caster, only ACMC 102 (264.55) or ACMC 127 (297.62) qualify.
If the required rating is at or below 220.46, any ACMC or ACMCT row whose rating meets or exceeds it is a candidate.
If the required rating is at or below 132.28, the ACMCT 76 is the lowest-rated option in the line.
The ACMCH 127 (198.42) is a candidate only if its unspecified mount type is confirmed to fit the equipment; contact Zambus before specifying it.

Step 3: Match to a mount type

From the candidate rows, keep only those whose available mount types match the equipment's mounting hardware. If the equipment requires a round stem, only ACMC 102 and ACMC 127 qualify; no other series offers that option. For guidance on measuring and selecting between flange and stem mounts, refer to the mount comparison guide.

Rigid route: There is no rigid caster in the Carrymaster medical plastic line. If a rigid configuration is required, the non-leveling ACSU and ACLU series carry rigid flange options. For brake placement and swivel-to-rigid configuration guidance, see the swivel vs. rigid caster configuration guide.

Step 4: Decide on brake

If the application requires a brake, add the B suffix to the model code. The brake does not change the load rating. The brake mechanism is not described on the Carrymaster medical plastic product pages; confirm brake details with Zambus before specifying for applications where braking behavior is a design requirement.

Step 5: Confirm wheel material

If wheel material is a specification requirement, use the materials table to confirm that the candidate model uses the required tread. ACMC and ACMCH models use TPR; ACMCT models use PA + PU. If the equipment is replacing existing casters, see the medical cart caster replacement guide for identification steps before ordering.

Ordering Carrymaster medical casters

Once the five steps produce a model number, the medical plastic casters category lists every Carrymaster model with its product drawing, full specifications and ordering options.

For applications where the mount type, brake behavior, wheel material or load calculation needs confirmation before a purchase order is placed, the Zambus team is available to review the specification directly.

Contact Zambus, Inc.:

Phone: (973) 777-4922
Email: sales@zambus.com
Address: Palisades Park, NJ
Online: zambus.com/contact-us

Frequently asked questions

Which Carrymaster medical caster should I use if each caster carries about 250 lbs?

The ACMC 102, rated 264.55 lbs per caster, or the ACMC 127, rated 297.62 lbs per caster. Every ACMCT model tops out at 220.46 lbs and the ACMCH at 198.42 lbs, so neither covers 250 lbs. The ACMC 102 and 127 both come in flange, stem and round stem versions, with or without a brake.

Can a stem-mount ACMCT be swapped for a flange-mount ACMC on the same equipment?

Only if the equipment can take the new mount. A stem caster and a flange caster attach to equipment in different ways, so changing mount type changes what the equipment must provide. If it can, the swap also raises the rating: at every size code, the Carrymaster ACMC is rated higher than the ACMCT, for example 264.55 against 176.37 lbs at size code 102.

Does adding the B brake option change the model's dimensions?

Check the drawing before assuming it does not. Each braked Carrymaster medical caster has its own product page with its own dimension drawing, separate from the unbraked version. The load rating is identical between the two, but compare both drawings against the space on the equipment before ordering the braked model.

Why is the ACMCH rated the same as the smaller ACMC 76?

Carrymaster's product pages do not give a reason. They show the ACMCH 127 and the ACMC 76 at the same 198.42 lbs per caster, even though the ACMCH sits in the over 5 inch wheel-size band and the ACMC 76 in the 2 to 3 inch band. A larger wheel does not guarantee a higher rating, so always select by the stated rating.

How many Carrymaster medical casters come with a brake?

15 of the 30. Every Carrymaster medical plastic caster model has a braked and an unbraked version: 8 braked ACMC models, 6 braked ACMCT models and 1 braked ACMCH model. The braked model is identified by the B at the end of the model number, and it carries the same load rating as its unbraked partner.

Can I use braked and unbraked Carrymaster medical casters together on one piece of equipment?

Yes, and the mix does not change the load rating, because each braked Carrymaster medical caster carries the same rating as its unbraked version. How many corners need a brake, and which ones, is a configuration decision covered in the swivel and rigid caster configuration guide.

Do Carrymaster medical casters list a temperature or chemical resistance rating?

No. The Carrymaster medical plastic caster product pages state a description, an application line, a load capacity, dimensions and materials. They do not list a temperature range or a chemical resistance rating. If the equipment will see heat, cold or specific cleaning products, send the details to Zambus at sales@zambus.com before ordering.

Can I use Carrymaster medical casters on non-medical equipment?

Yes, within their ratings. The application line on the Carrymaster medical plastic caster product pages lists "Light Load of Trolley & Carts" alongside medical devices. The ratings run from 132.28 lbs per caster (ACMCT 76) to 297.62 lbs per caster (ACMC 127), so choose by the load each caster will carry, not by the type of equipment.

What if my load per caster is above 297.62 lbs?

Then the load is beyond the Carrymaster medical plastic line, whose highest rating is 297.62 lbs per caster on the ACMC 127. Higher-capacity Carrymaster casters sit in the non-leveling caster range and the leveling caster range. Zambus can help match one at (973) 777-4922.

How do I confirm the right Carrymaster model with Zambus before ordering?

Send Zambus the load each caster will carry, the mount the equipment takes (flange, stem or round stem), whether a brake is needed and any wheel material requirement. With those four details, Zambus can confirm a Carrymaster model number. Call (973) 777-4922, email sales@zambus.com or use the contact page.