Mull

What Mull does

Mull Group, Inc. is a family-owned heavy industrial manufacturing group headquartered in Benwood, West Virginia (with production facilities within an eight-mile radius in the Wheeling/Benwood area). Founded in 1961 by Bill Mull as a single machine shop serving Ohio Valley steel mills, the company has grown over three generations into a federation of eleven operating businesses including machine shops, a brass and bronze foundry (Nail City Bronze, est. 1877), a gearing division (Bethlehem Gear & Machine), galvanized steel production, and commercial real estate. Current leadership rests with third-generation President & CEO James B. Mull, who assumed the role in 2024 following the December 2023 passing of W. Quay Mull II.

The company's core offering is custom manufacturing, rebuild, and reverse-engineering services for critical mill equipment: mandrels and reels (150+ units annually), gearboxes and gears (to 96-inch OD, AGMA 10+), crop shears, bearing chocks and housings, large engineered mill components (edger housings, AGC beams, drive spindles, coil cars), and large industrial pumps. Production is anchored by four in-house capabilities — mechanical engineering (SolidWorks, AutoCAD, Inventor; ASME Y14 drawings), precision machining (200+ CNC machines across four shops, components to 73,000 lbs and 210 inches), brass and bronze casting (2,000-lb capacity, 10,000+ patterns), and assembly/testing — under a "no subcontracting" vertically integrated model. A documented case study reports a Southeast Steel Producer mandrel rebuild that extended campaign life from 800,000 tons to 4.5 million tons after reverse engineering and material upgrades.

The go-to-market is purely direct B2B enterprise field sales to industrial operations across ten verticals: steel mills (primary), automotive, aluminum, forging, mining, nuclear, paper, oil & gas, power generation, and water treatment. Sales originate from a website quote-request form, direct phone contact, and 24/7 emergency response (crews dispatched within the hour). Pricing is entirely quote-based on custom-engineered projects, with emergency work commanding premium pricing; no public pricing exists. Revenue mixes project-based new manufacturing, rebuild/repair services, standalone engineering, and spare-parts sales across the vertical mix. The company is a private, closely held West Virginia corporation with no disclosed funding rounds, no PE/VC sponsorship, and no public revenue disclosure.

Name

Mull

Legal name

Mull Group, Inc.

Website

https://mullgroup.com

Company type

Private

Founded year

1961

Operating status

Operating

Headcount range

101–250 employees

Short description

Mull Group, Inc. is a family-owned, third-generation heavy industrial manufacturer in Benwood/Wheeling, West Virginia that engineers, machines, casts, and assembles custom and rebuilt critical mill equipment — mandrels, reels, gearboxes, chocks, shears, and pumps — for steel mills, automotive, mining, nuclear, power generation, and other heavy industries.

Ownership category

akta.pro rank

Product category

Industrial Mill Equipment Manufacturing

NAICS

Agriculture, Construction, and Mining Machinery Manufacturing (3331), Mining Machinery and Equipment Manufacturing (333131), Machine Shops (33271)

SIC

Mining Machinery & Equip (No Oil & Gas Field Mach & Equip) (3532), Construction, Mining & Materials Handling Machinery & Equip (3530), Special Industry Machinery (No Metalworking Machinery) (3550)

akta.pro primary industry

Grinding & Milling Equipment (IMAHAMAF)

akta.pro secondary industries

Wear Parts & Consumables (GET, Liners, Drill Bits, Grinding Media) (IMAKANAH), Cranes, Hoists & Overhead Material Handling (Industrial) (IMAHABAE)

Keywords

• Mill equipment manufacturing
• Heavy industrial machining
• Brass bronze foundry
• Gearbox rebuild services
• Rolling mill components

Headquarters

HQ city

Wheeling

HQ country

United States

HQ region

North America

Offices2 records

Markets served

GTM type

B2B

Offering type

Hardware or Manufacturing

Cost components

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

Revenue model

1. Custom Manufacturing: One-time project-based revenue from manufacturing new custom mill equipment (mandrels, reels, gearboxes, chocks, mill components, pumps, crop shears) to customer print or reverse-engineered design. Components are engineered, machined, cast, assembled, and tested before delivery. Revenue recognized upon delivery of completed equipment.
2. Rebuild and Repair Services: Revenue from rebuilding and refurbishing existing customer equipment (mandrel rebuilds, gearbox rebuilds, pump rebuilds, chock re-bushing). Full teardown, inspection, weld repair, component replacement, reassembly, and testing. Emergency response services available 24/7 for unplanned failures with expedited turnaround.
3. Bronze Casting Services: Sand-cast brass and bronze components sold to customers from existing patterns (10,000+ available) or as custom castings. CNC finishing available under the same roof. Standard alloys (C93200, C95400, C93700, C86300) and custom alloys on request.
4. Engineering Services: Standalone mechanical engineering services including CAD drawings, reverse engineering, engineering studies, failure analysis, and capacity upgrades offered separately from manufacturing. Engineers produce 2D prints, 3D models, feasibility studies, and full documentation.
5. Spare Parts: Precision-machined replacement parts (impellers, shafts, wear rings, sleeves, casings, bearings, gears) for industrial pumps, gearboxes, and mill equipment when OEM support has disappeared or lead times are unacceptable.

Go-to-market motion1 record

Distribution channels1 record

Marketing channels3 records

Core offering

Mull Group is a single-source heavy industrial manufacturer that engineers, machines, casts, and assembles critical mill equipment — including mandrels, reels, gearboxes, crop shears, chocks, pumps, and engineered mill components — for steel mills, automotive suppliers, mining, nuclear, paper, oil & gas, power generation, and water treatment facilities. The company also rebuilds and repairs existing equipment, offers in-house mechanical engineering (reverse engineering, CAD, failure analysis), and runs Nail City Bronze, a brass and bronze foundry established in 1877, all within four facilities within an eight-mile radius in the Ohio Valley.

Product overview

Mull Group operates as a single-source provider for rolling mill equipment, offering eight integrated service categories: Mandrels & Reels, Gearboxes (Bethlehem Gear Division), Crop Shears, Chocks & Housings, Mill Components & Assemblies, Pumps, Engineering & Design, and Brass & Bronze Foundry (Nail City Bronze). The company provides manufacturing, rebuild, and engineering services across four in-house capabilities: engineering & design, precision machining (200+ machines), casting & foundry, and assembly & field service. All capabilities are housed within their own facilities across four shops within an eight-mile radius, with no subcontracting.

Differentiator

Problem solved

Functional benefit

Products and services

• Mandrels & Reels Custom manufacturing, rebuilds, engineering upgrades, and repair of recoiler, uncoiler, tension, stub, hot strip, and cold mill mandrels and payoff/take-up reels for coil lines. For steel mills, mini-mills, aluminum rolling, and processing operations.
• Gearboxes (Bethlehem Gear & Machine Division) Complete new gear drives, individual replacement gears, and full gearbox rebuilds through Bethlehem Gear & Machine. Supports spur, helical, bevel, and worm configurations. For industrial operations requiring gearing up to 96 inches in diameter.
• Crop Shears Complete crop shear assemblies, drum assemblies, blades, holders, and drive trains for hot strip lines, plate mills, and continuous casters. Includes new assemblies, sub-components, engineering, and rebuild services.
• Chocks & Housings Bearing chocks, edger housings, and backup chock assemblies with bronze bushings cast and finished in-house. Includes new builds, re-bushing services, and full rebuilds with zero subcontracted work.
• Mill Components & Assemblies Large engineered components including edger housings, side trimmers, AGC beams, drive spindles, coil cars, and equalizing beams for hot strip and cold mills. Services include new builds, rebuilds, reverse engineering, and assembly.
• Pumps Large industrial water and process pumps including complete new manufacturing, full rebuilds to OEM specifications, and precision-machined spare parts such as impellers, shafts, wear rings, and casings.
• Engineering & Design In-house mechanical engineering services including CAD drawings, reverse engineering, failure analysis, capacity upgrades, and engineering studies. Supports SolidWorks, AutoCAD, and Inventor with ASME Y14 drawing standards.
• Brass & Bronze Foundry (Nail City Bronze) Sand-cast brass and bronze components up to 2,000 pounds with over 10,000 patterns on hand. Standard alloys (C93200, C95400, C93700, C86300) and custom alloys on request, with CNC finishing under the same roof.

Quantifiable outcome

• Mandrel campaign life increased from 800k tons to 4.5M tons (4x improvement) through reverse engineering and material upgrades
• +2 more outcomes

Named customers1 record

Segments10 records

Ideal customer profiles1 record

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature7 records

Scale indicators12 records

Recent moves6 records

Expansion highlights5 records

Direct peers

• St. Marys Foundry: Custom ductile iron and steel castings producer serving industrial markets. Comparable to Mull's foundry division in custom casting for heavy industrial applications.
• Ellwood Group: Family-owned heavy industrial manufacturer with integrated forging, casting, and machining capabilities serving steel mills and other heavy industries. Closely comparable to Mull in its vertical integration, family ownership, and Ohio Valley roots.
• Metaltek International: Specialty metal component manufacturer combining foundry capabilities with precision machining and engineering. Comparable to Mull's integrated casting-plus-machining model for industrial customers.
• Waupaca Foundry: Large iron casting foundry serving industrial markets including automotive, construction, and heavy equipment. Comparable to Mull in foundry-centric manufacturing serving heavy industrial customers, though focused on iron rather than non-ferrous.
• Quaker City Castings: Non-ferrous (brass and bronze) sand casting foundry serving industrial customers. Closely comparable to Mull's Nail City Bronze division in casting process, alloy focus, and target end markets.
• Scot Forge: Custom open-die forging and machining company serving heavy industrial customers including steel, mining, and power generation. Comparable to Mull in custom industrial manufacturing for critical equipment applications.

Broad incumbents

• Primetals Technologies: Global engineering company supplying complete metallurgical plants and equipment, including rolling mill technology. Same end market as Mull but operates at OEM/platform scale with a much broader solution portfolio.
• Danieli: Italian-headquartered global supplier of equipment and plants for the metals industry, including rolling mills. Competes in the same end market as Mull but designs and builds complete mills rather than components and rebuilds.
• SMS group: Global plant and equipment manufacturer for the metals industry, including rolling mills. Comparable end market (steel mill equipment) but at vastly larger scale and as a broad-line OEM rather than a regional component supplier.
• Bradken: Global manufacturer of wear parts and heavy industrial equipment for mining, resources, and infrastructure. Comparable to Mull's industrial casting and wear-part capabilities but at much larger scale and broader geographic footprint.

Market position

Strengths4 records

Weaknesses4 records

Competitive moat5 records

Key risks6 records

Key highlights7 records

Customer concentration

• LinkedInlinkedin.com/company/mull-group-inc

Revenue estimate

Valuation estimate

Number of profiles

Profiles1 record

Subsidiaries2 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 Mull