Capabilities & Facilities
- Foundry
Four capabilities.
One Call, one company.
One Call, one company.
- Our Approach
When critical mill equipment goes down, the last thing a maintenance manager wants is a vendor who has to wait on three other vendors before the work can start.
Mull Group operates four production capabilities under our own roofs — a brass and bronze foundry, machine shops with over 200 machines including 5-axis CNC centers, a weld and fabrication shop with stress-relieve furnace, and an in-house mechanical engineering team. Each one feeds the next. A pattern goes from the foundry into the machine shop. A weldment goes from fabrication into stress-relief and out to the customer. A drawing goes from engineering into production the same day.
This is not vertical integration as marketing language. It is how we operate every day, and it is the reason we can do work no single-discipline shop in our region can match.
- 01 / Capability
Brass & Bronze Foundry.
Sand-cast brass and bronze components up to 2,000 pounds, supported by an in-house engineering team and a master pattern maker with over 10,000 patterns already on hand.
Our pattern library is one of our most under-appreciated assets. For a wide range of standard components — bushings, wear rings, gear blanks, pump impellers — we can pull a pattern off the shelf and start pouring within hours. No pattern lead time. No setup delay. The work moves.
For custom castings, our pattern shop builds new patterns to engineering print or reverse-engineered drawing. Custom alloys are available on request. If you have a load condition the standard alloys don’t solve, our team will work the chemistry with you.
- Sand casting up to 2,000 pounds
- 10,000+ patterns on hand for fast turnaround
- In-house engineering and pattern-making team
- Standard alloys: C93200, C95400, C93700, C86300
- Custom alloys on request
- CNC finishing under the same roof
- 02 / Capability
Precision
Machining
Mull Group’s machine shop capacity is the largest single-source machining capability in the Ohio Valley. Over 200 machines spread across four production facilities — every one of them within an eight-mile radius of our headquarters in Benwood.
Our equipment list ranges from manual lathes for journeyman work up through state-of-the-art 5-axis CNC machining centers for complex geometries and tight tolerances. CNC lathes, horizontal boring mills, gantry mills, surface and cylindrical grinders, gear hobbing and shaping machines — the full complement of equipment a modern industrial machine shop needs.
- Over 200 machines across 4 facilities
- State-of-the-art 5-axis CNC machining centers
- CNC lathes, mills, grinders, boring mills, gear cutting
- Components up to 73,000 lbs / 210 in length
- Manual through CNC capability — full range
- All four facilities within 8 miles of HQ
- 03 / Capability
Weld & Fabrication Shop.
Our weld and fabrication shop handles structural fabrications and weldments up to 10 tons (20,000 pounds) — frames, housings, tanks, weld overlay rebuilds, and the heavy structural work that supports our larger machined assemblies.
The differentiator is the stress-relieve furnace on site. Most shops in our region either skip stress-relief on welded assemblies or send the work out to a heat-treat house, which adds days of lead time and an extra logistics handoff. We do it in our own building — weld, stress-relieve, machine, ship — without the part ever leaving the campus.
That matters most on critical structural welds where dimensional stability post-machining is non-negotiable. Stress-relief eliminates the residual welding stress that warps a part months after it’s installed. We’ve been doing it this way long enough to know the difference shows up in field life, not just on the certification paperwork.
- Fabrication up to 10 tons (20,000 lbs)
- Stress-relieve furnace on site
- Structural welding to AWS standards
- Weld overlay rebuild capability
- Multiple processes: SAW, FCAW, GMAW, SMAW
- Coordinated weld → stress-relief → machine workflow
- 04 / Capability
Engineering
Team.
Mechanical engineers. In-house. Every drawing we ship.
Our in-house mechanical engineering team is the backbone of everything we manufacture. Real engineers at real CAD stations, doing the design, analysis, and drawing work that supports our own production and that we offer to customers as a standalone service.
When the OEM has vanished, the print is forty years old, or the equipment is failing because the original design didn’t account for today’s loads — our engineers can study it, measure it, redraw it, analyze it, and upgrade it. This is not consulting. These are engineers who walk the shop floor every day and know how to design parts that can actually be built.
Reverse engineering, capacity upgrades, failure analysis, full production drawings, assembly drawings, and bills of material. Whatever the question is, we have the team to answer it — and the production capability to build the answer once it’s drawn.
- Mechanical engineers on staff full-time
- Reverse engineering from sample, scan, or teardown
- Engineering studies — feasibility, design, capacity upgrades
- Failure root-cause analysis with documented reports
- Production drawings, assembly drawings, BOMs
- SolidWorks · AutoCAD · Inventor
