CH4021 Medical Caster
50 to 125mm wheels under equipment that moves daily and must not mark the floor.
Published Specification
- ModelCH4021
- Wheel MaterialTPR
- Wheel Dia(mm)75/100/125
- Wheel Width32
- Overall Height(mm)123/138/165
- Capacity(kg)70/85/105
Include the quantity, your destination port or market and your company name. Renwei states that enquiries are answered within 12 hours.
What This Model Is
The CH4021 is a light duty caster from the Qingdao Renwei catalogue. The wheel is TPR, offered in 75/100/125mm diameters, on a 32mm section, and rated at 70/85/105kg respectively.
Diameter and capacity are published as parallel lists: the first capacity belongs to the first diameter, and so on down the row.
What the Specification Tells a Buyer
TPR wheel
A softer wheel material runs quieter and protects finished floors, at the cost of some capacity.
Capacity published per diameter
This model is listed as 75mm at 70kg, 100mm at 85kg, 125mm at 105kg. Using the divide-by-three rule, a set of four 125mm casters covers equipment up to about 315kg.
Fitted height published
Overall height is listed as 123/138/165mm across the diameters offered, so a replacement can be chosen without changing the working height of the equipment.
Matched spares from the same catalogue
Wheels, casters and tubes are published here as their own models with their own specifications, so a worn part can be ordered by model number instead of described over email.
Full Published Specification
Every value below is taken from the Renwei catalogue entry for this model. Rows marked as not published are shown rather than hidden, so you know exactly which questions to ask.
| Model | CH4021 |
|---|---|
| Wheel Material | TPR |
| Wheel Dia(mm) | 75/100/125 |
| Wheel Width | 32 |
| Overall Height(mm) | 123/138/165 |
| Capacity(kg) | 70/85/105 |
| Bracket Type | Not published on the source site |
Reading this table
Wheel diameter, overall height and capacity are published as parallel lists — 75/100/125 diameter against 50/70/100 capacity means each diameter has its own rating.
How the CH4021 Compares Within the Family
Published Capacity(kg) for this model set against its neighbours in the Light Heavy Caster family. Figures are as published; no model is shown with an estimated value.
| Model | Capacity(kg) |
|---|---|
| CH4021 | 70/85/105 |
| CT3701 | 15/20/25/30 |
| CT4001 | 90/120/140 |
| CG2021 | 20/25 |
What Is Published and What to Ask
Wheel material is published for this model. Bracket material, raceway type and fixing pattern are not, so ask for them if you are matching an existing fitment.
Before you order
Minimum order quantity, lead time, payment terms, warranty and certifications are not published by Renwei. Ask for all five in writing against this model number before planning a shipment.
Getting the Best From This Model
- Match the overall height when replacing, or the equipment will change working height.
- Fit two fixed and two swivel casters where the equipment has to track straight over distance.
- Keep swarf and thread out of the raceway; it is the most common cause of a stiff swivel.
- Divide the total loaded weight by three rather than four when selecting capacity, and add a margin for shock loading over thresholds.
Industries and Applications
Manufacturing and Workshops
Retail and Wholesale Supply
Warehousing and Logistics
Solutions Relevant to This Model
Wheel and Caster Matching
Spare Parts and After Sales
Private Label and OEM
CH4021 Medical Caster Questions
What load is the CH4021 rated for?
The source catalogue publishes 70/85/105kg for this model. It is a per-model figure, so use it rather than a figure quoted for the Light Heavy Caster range as a whole.
Which capacity applies to the 75mm wheel on the CH4021?
The lists run in parallel, so the 75mm wheel is rated at 70kg and the 125mm wheel at 105kg. Read the diameter row and the capacity row together rather than taking the highest number.
What is the minimum order quantity and lead time?
Neither is published on the source site, so neither is stated here. Send this model number with the quantity you are considering and ask for both in writing before you plan a shipment.
Are certificates or test reports available for the CH4021?
The source site publishes no certification list, so none is claimed on this page. Request the specific certificates your market requires and ask for them in writing before ordering.
Other Light Heavy Caster Models
Technical Reading
Caster Load Ratings Explained
Matching Wheel Material to Your Floor
Wheel Bore Hub and Bearing Guide
Quote the CH4021 Medical Caster
Send this model number with the quantity you need, your destination port or market, and your company name.