Introducing: Defender D4 Stainless Steel Casters

Defender D4 Stainless Steel Casters

Introducing the Defender D4 Series, our strongest and latest advancement in 2″ wide stainless steel kingpin casters. Featuring a robust 3/4″ kingpin construction, Defender D4 rigs outlasted traditional 5/8″ kingpin rigs by up to 2x in internal durability testing—making the Defender D4 your best protection in corrosive environments!

The D4 Series provides an array of solutions ideal for customers requiring lasting performance and corrosion resistance. Constructed from 1/4″ thick Type 304 stainless steel, this new caster series provides a critical defense to applications exposed to washdowns, cleaning agents, steam, caustic solutions, and other environmental conditions that eventually cause oxidation and failure in carbon steel casters.

Below you will find helpful resources to learn more about this new series and even grab CAD models or datasheets.

What makes the Defender D4 unique? 

  • Highly polished Type 304 stainless steel construction
  • 1/4” Thick top plate & legs; legs precision welded to yoke
  • 3/4” Diameter kingpin for durability and long life
  • Food grade performance grease (-40°F to 600°F; FDA approved)
  • Up to 1,250 lb. capacities; 4″-8″ sizes
  • 3-Year warranty
  • NSF listed



Part Numbers & Specifications:  View and download the Colson Defender D4 literature to see the complete product offering.




CAD Models & Datasheets:  Native Defender D4 CAD caster models and 3D interactive datasheets are readily available for download online or on our Caster CAD 3D app. Visit and simply change the wheel type to your desired wheel, update the CAD model preview, and download the CAD model/datasheet.


​​ Will the Defender D4 replace any other legacy Colson Group series? 

The Defender D4 importantly allows Colson Group to optimize its 2″ wide premium stainless steel lines into one power-house offering that delivers best-in-class construction, performance, and competitiveness. Previously fragmented inventories across five brands will be consolidated and enhanced under the Defender D4 program to provide reliable, high levels of service for your stainless requirements. Legacy stainless caster series that will be retired and replaced by the new Defender D4 include: Colson 4 Series SS; Albion 05 Series; Jarvis S81/S82; MedCaster SS; and Bassick Prism SS Series. Please contact your Regional Sales Manager with any questions regarding these product transitions.

Colson Group Announces Strategic Acquisition by Blue Wolf Capital Partners


Aligned philosophies and vision for increasing customer value and accelerating global growth


OAKBROOK TERRACE, IL., March 1, 2021 — Colson Group, a global leader in caster and wheel product solutions, today announced its acquisition by Blue Wolf Capital Partners LLC (“Blue Wolf”).

“We are excited to partner with Blue Wolf, a firm that shares our philosophies and vision for Colson Group,” stated Tom Blashill, CEO of Colson Group. “While our strong global brands and experienced team attracted substantial investor attention, Blue Wolf differentiated themselves. Their expertise and deep understanding of industrial businesses and customer channels will be a tremendous asset in our plans for operational and service excellence. Blue Wolf appreciates the work completed so far in our global transformation and their skillset and strategy will help accelerate it with further investments in domestic manufacturing, service technologies, and product solutions that continue to separate us from the competition.”

Blue Wolf is a New York-based private equity firm that builds stronger businesses by combining financial and operational discipline with Environmental, Social, and Governance (ESG) principles. The firm works closely with management to create value at companies in specialty sectors including niche manufacturing, industrial & engineering services, forest & building products and healthcare services.

“Our experience building best-in-class industrial manufacturing companies positions Blue Wolf well to support Colson Group in accelerating growth and enhancing its current market position and manufacturing strategy,” said Adam Blumenthal, Managing Partner of Blue Wolf Capital Partners. “We are excited to partner with Tom Blashill and the Colson Group management team to provide the necessary capital and resources to drive long-term growth opportunities for the company and its customers. We look forward to building on Colson Group’s rich legacy of product solutions and long-standing business relationships with our commitment to organizational and operational excellence.”

Former owner Sentinel Capital Partners sold Colson Group to Blue Wolf after acquiring the company in 2012. Prior to Sentinel, the company was held by Robert Pritzker who acquired the Colson caster brand in 1953 and built it into the worldwide caster leader that is now Colson Group.

About Colson Group ( Colson Group, a global leader in caster and wheel products, creates and drives solutions that move lives forward. World renowned brands provide specialized mobility for every industry and market. A leading product portfolio and proprietary global value chain deliver unparalleled efficiencies and support. With over 1,600 employees across 30 global facilities, Colson Group is committed to its customers’ success, ensuring proper products are selected or designed from the start, and always keeping the end-users’ safety, efficiency, and happiness in mind.

About Blue Wolf Capital Partners: Blue Wolf Capital Partners LLC is a private equity firm that specializes in control investments in middle market companies. Leading by experience, and with a commitment to excellence, Blue Wolf transforms companies strategically, operationally and collaboratively. Blue Wolf manages challenging situations and complex relationships between business, customers, employees, unions, and regulators to build value for stakeholders. For additional information, please visit



Colson Adds New 2 Series Models to World’s Largest Caster CAD Model Library

Colson 2 Series CAD Additions

Colson Group USA, a leading global caster and wheel manufacturer, is expanding its world’s largest computer-aided design (CAD) model library with the addition of three Colson brand product series: the 2-Series LoPro, 2-Series Stainless, and 2-Series Stainless Steel Precision. Customers can now quickly configure part numbers and download or deliver 2D/3D CAD models and interactive 3D PDF datasheets for these new additions.

“Colson continues to advance the world’s largest caster CAD library, meeting our customers’ needs for high-quality, dependable casters,” said Colson Light Duty Product Manager Jeremy Brault. “Through the expansion of the 2-series CAD models, customers can easily access pertinent specifications and easily integrate the designs of these three premium, three-year warranty products for their various caster and wheel needs.”

The 2-Series LoPro features a low profile design with cushion or hard rubber wheel options, providing floor protection and quiet operation in the lowest overall height; ideal for business machines, stock picking carts, warehouse dollies, and housekeeping carts. The 2-Series Stainless Steel series offers several tread types in 3” to 5” wheel sizes, two brake options, and a higher grade of stainless steel helping to prevent rust in even the most corrosive conditions. This makes it ideal for hostile and controlled environments, including the food, pharmaceutical, and healthcare industries. The 2-Series Precision Stainless Steel series provides the same great advantages of the 2-Series Stainless, but adds improved ergonomics and noise reduction to a users’ experience through the use of a durable stainless precision bearing raceway.

The 2-series CAD models are available on Colson’s Caster CAD 3-D app or online at The 3-D CAD models are compliant with major world standards and are suitable for use in current CAD systems, saving engineers time, and money.