KOBELCO STEWART BOLLING

What KOBELCO STEWART BOLLING does

Kobelco Stewart Bolling, Inc. is a privately held industrial machinery manufacturer headquartered in Hudson, Ohio, that designs and builds high-performance mixing equipment for the tire, rubber, and plastics industries. The company's core product line comprises internal mixers, twin screw roller (TSR) head extruders, mills, rotors, and laboratory-scale equipment, with its competitive anchor being a patented six-wing rotor design marketed under the proprietary "Only One" technology brand. Beyond capital equipment, KOBELCO operates an aftermarket and services franchise — including spare parts, remanufacturing, equipment service, an in-house test facility, and consulting — that provides recurring revenue and deepens installed-base engagement.

The firm sells into three primary verticals: tire manufacturing (tread, sidewall, and component compounds), engineered rubber products (seals, gaskets, belts, molded components), and plastics compounding. Its go-to-market is direct enterprise field sales, with custom equipment quotes, on-site material testing at the Ohio test facility, and engineering-led engagement with customer procurement teams. Pricing is non-public and quote-driven, consistent with bespoke industrial capital equipment. The company self-positions as a "world leader" with international capabilities, though the firm is a focused mid-sized operator (101–250 employees) with no disclosed parent company, external funding rounds, or M&A activity in the source material.

Name

KOBELCO STEWART BOLLING

Legal name

Kobelco Stewart Bolling, Inc.

Website

https://ksbiusa.com

Company type

Private

Founded year

1989

Operating status

Operating

Headcount range

101–250 employees

Short description

Kobelco Stewart Bolling is a private Ohio-based manufacturer of industrial mixing machinery — including mixers, TSR extruders, rotors, and mills — serving the tire, engineered rubber, and plastics industries, with supporting aftermarket parts, remanufacturing, and test services.

Ownership category

akta.pro rank

Headquarters

HQ city

Hudson

HQ country

United States

HQ region

North America

Offices1 record

Markets served

GTM type

B2B

Offering type

Hardware or Manufacturing

Cost components

Supply Chain, Operations, Personnel, Technology or R&D, Marketing or Sales, Infrastructure

Revenue model

1. Industrial Machinery Equipment Sales: One-time sales of heavy industrial mixing equipment including mixers, twin screw roller head extruders, rotors, and mills. Equipment is custom-built for tire, rubber, and plastics manufacturers.
2. Aftermarket Parts and Service: Recurring revenue from spare parts for all machinery, equipment service and installation, and remanufacturing services.
3. Testing and Consulting Services: Mixing lab services and consulting for customers to test materials with various rotors, sheet out materials with TSR, or continue mixing with mills.

Go-to-market motion1 record

Distribution channels1 record

Marketing channels1 record

Core offering

KOBELCO Stewart Bolling designs, manufactures, and services high-performance industrial mixing machinery for the tire, rubber, and plastics industries, including internal mixers, twin screw roller (TSR) head extruders, rotors, mills, and laboratory equipment. The company sells custom-built capital equipment complemented by aftermarket spare parts, remanufacturing, equipment service, test facility access, and process consulting.

Product overview

KOBELCO Stewart Bolling is a world leader in industrial machinery for the tire, rubber, and plastics industries, offering a comprehensive portfolio of high-performance mixing technology. The product line centers on core processing equipment including Mixers (internal mixers), the Twin Screw Roller (TSR) Head Extruder, Mills, Rotors (featuring patented six-wing technology), and Laboratory Equipment. The portfolio is complemented by EMC (equipment monitoring and control) add-on systems. Supporting the equipment sales are service offerings including Aftermarket/Spare Parts, Remanufacturing, Equipment Service, Test Facilities, and Consulting services. The company serves three primary industries: Tires, Engineered Rubber, and Plastics.

Differentiator

Problem solved

Functional benefit

Products and services

• Mixers High-performance internal mixers for the tire, rubber, and plastics industries, designed for intensive mixing applications and built around proprietary rotor technology including the patented six-wing rotor.
• Twin Screw Roller (TSR) Head Extruder Twin screw roller extruder featuring the patented TSR head technology for advanced material processing and sheet extrusion in rubber and plastics manufacturing.
• Rotors Internal mixer rotors including the patented six-wing rotor design, engineered for versatility and optimal mixing performance across compound types.
• Mills Milling equipment for processing mixed materials, complementary to KOBELCO's mixing and extrusion systems in rubber and plastics operations.
• Laboratory Equipment Lab-scale equipment for testing and development, featuring mixers that can run any of the available rotors with optional TSR sheet-out capability, supporting customer process development.
• Aftermarket Sales (Spare Parts) Wide array of aftermarket spare parts for all KOBELCO machinery, supporting ongoing operations and maintenance of installed equipment.
• Remanufacturing Complete remanufacturing services for KOBELCO equipment, restoring machinery to operational specification.
• Equipment Service Professional equipment service and installation support provided by experienced technicians for KOBELCO machinery customers.
• Test Facilities Testing facility featuring mixers capable of running any rotor configuration, including TSR sheet-out and mill mixing capabilities, enabling customer material trials and proof-of-concept work.
• Consulting Expert consulting services for mixing technology and process optimization, supporting customers in compound development and equipment selection.

Segments3 records

Ideal customer profiles3 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature1 record

Scale indicators2 records

Recent moves5 records

Expansion highlights4 records

Direct peers

• Baker Perkins: UK-based maker of process machinery with a heritage in rubber compounding and mixing equipment. Directly comparable to KSB's engineered-rubber and rubber-goods machinery offerings.
• Charles Ross & Son: U.S.-based manufacturer of industrial mixing equipment (batch and continuous mixers, blenders, dispersers). Overlaps with KSB on mixing hardware, though Ross & Son serves a broader industrial customer base including rubber, plastics, adhesives and chemicals.
• Labotek: Danish supplier of plastics mixing, dosing, conveying and storage equipment. Comparable to KSB's plastics-industry mixing line and laboratory/auxiliary equipment.
• HF Mixing Group (Harburg-Freudenberger): Headquartered in Germany, HF Mixing Group is one of the world's leading manufacturers of internal mixers and tire/rubber processing machinery — the closest direct competitor to KSB's mixer and tire-industry product lines.
• Pomini Rubber & Plastics (Techint Group): Italian specialist in internal mixers and continuous mixing/extrusion equipment for the tire and rubber industry. Directly comparable to KSB's mixer, TSR extruder and rotor portfolio serving rubber compounders.

Others

• Kobe Steel / Kobelco Group: Japanese industrial conglomerate whose Kobelco machinery brand is leveraged by KSB. Not a direct equipment competitor but a related ecosystem party whose brand licensing and strategic posture materially affect KSB's commercial identity.

Broad incumbents

• Hosokawa Alpine: German-Japanese process equipment group with a broad portfolio across plastics processing, compounding and size reduction. Overlaps with KSB in plastics compounding machinery but operates at significantly larger scale and across more product categories.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat4 records

Key risks6 records

Key highlights7 records

Customer concentration

• LinkedInlinkedin.com/company/kobelco-stewart-bolling-inc-

Revenue estimate

Valuation estimate

Number of profiles

Profiles5 records

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about KOBELCO STEWART BOLLING