Up to 350 lbs
Up to 7,000 lbs
Up to 16,000 lbs
Up to 40,000 lbs
Shock absorbing
Outdoor / rough terrain
View All Specialty Casters
Browse all specialty caster types
All measurements indicate the wheel diameter by the tread width.
The below capacity ranges indicate the working (dynamic) load that each caster will support. A safety factor should be included in your formula to determine your required load rating per caster.
W/(C-1)=R W is total weight needed to move. C is total number of casters required. R is ideal load rating, with safety factor built in. Divide the total load weight by one less caster than you will use to safely determine load rating.
Plate dimensions shown are overall mounting plate size.
When replacing existing casters, select the closest plate size and verify bolt-hole compatibility.
BHP = Bolt Hole Pattern, shown under each plate.
PRODUCT CODE: 2.03267.53-MTG51
The 3.5" x 1.25" Polyolefin Delrin Bearing Caster with 7/8" to 15/16" Inside Dia. Square Tubing Expanding Adapter (MTG51) offers exceptional versatility and performance for a range of industrial applications. Featuring a high-quality polyolefin wheel paired with a Delrin bearing, this caster delivers smooth and reliable movement even under heavy-duty loads. The expanding adapter design ensures compatibility with square tubing, making it easy to install in a variety of setups. Whether you're transporting equipment, machinery, or materials, this caster provides excellent load-bearing capacity and durability.
Our 3.5" x 1.25" Polyolefin Delrin Bearing Caster with Expanding Adapter (MTG51) is built to meet the highest standards of industrial reliability and performance. Each caster undergoes strict quality control tests to ensure it withstands demanding conditions and provides long-lasting performance. Whether you're using it for material handling or equipment transport, you can count on this caster to support your operations with smooth, dependable mobility. Backed by our satisfaction guarantee, we are committed to delivering high-quality solutions to meet your business needs.
Transparent pricing
All pricing and quantity discounts are applied automatically. No promo codes required and no post-checkout price changes.
Upfront shipping costs
Shipping is calculated by order size and weight. Final shipping costs are shown before payment so there are no surprises.
Business-friendly ordering
We support bulk orders, repeat purchases, and fast quotes for larger or custom requirements.
Real support from product specialists
Need help confirming fit, compatibility, or application? Our team works directly with engineers, maintenance teams, and buyers every day.
Trusted by industrial and commercial customers
CasterHQ supplies casters and wheels for manufacturing, material handling, retail, and distribution environments nationwide.
When will my order ship?
In-stock items typically ship same or next business day. Weekend orders ship Monday or Tuesday unless stated otherwise.
Will shipping cost more at checkout?
Shipping is not free on most orders. Your final shipping cost is shown before payment.
Central & Southern U.S.: typically 1–2 business days
East & West Coasts: typically 2–3 business days
Remote areas may take longer.
Some custom products (select Made in USA casters, keyway wheels, drive wheels) are built after purchase and ship on a longer lead time. When applicable, the ship-time estimate is shown on the product page.
Contact us before ordering and we’ll confirm total landed cost upfront. Contact us.
The 3.5" x 1.25" Polyolefin Delrin Bearing Caster with 7/8" to 15/16" Inside Dia. Square Tubing Expanding Adapter (MTG51) is designed for use in a wide variety of industrial applications. With a load capacity of 230 lbs, this caster offers durability, reliability, and exceptional performance under heavy-duty conditions. Built to handle challenging environments, it features high-quality polyolefin wheels and Delrin bearings that provide smooth, effortless movement even under substantial loads.
The 3.5" x 1.25" Polyolefin Delrin Bearing Caster with Expanding Adapter is ideal for use in various industrial environments, such as:
This caster provides outstanding performance in environments that demand durability, corrosion resistance, and smooth movement under high loads. With a robust polyolefin wheel, Delrin bearings, and a full double ball hardened raceway, it is built to handle extreme conditions without compromising performance. Its versatility in mounting, along with its impressive load capacity and temperature resistance, makes it the go-to solution for a variety of industrial and commercial applications. The included expanding adapter adds to its flexibility, making installation straightforward and adaptable to different systems.
We prioritize quality and reliability in all of our products. The 3.5" x 1.25" Polyolefin Delrin Bearing Caster is rigorously tested to ensure it meets the highest industry standards. We stand behind our products with a 3-year warranty and a satisfaction guarantee. When you choose this caster, you're investing in a product built for performance, longevity, and customer satisfaction.
$54.00
| Wheel Diameter | 3-1/2" |
| Wheel Tread Width | 1-1/4" |
| Overall Height | 4.56" |
| Wheel Capacity | 230 lbs |
| Temp Range | -20°F to 180°F |
| Wheel Material | Polyolefin |
| Frame Material | Zinc Plated Steel |
| Mount Style | Plate |
| Rig Type | Swivel |
| Brake Type | No Brake |
Designed for engineers, manufacturers, and material handling professionals
Search
