Mandrels & Reels
- Core Equipment
Mandrels
& Reels.
Built to outlast OEM.
Built to outlast OEM.
- Our Approach
The mandrel sets the limit. We raise it.
Rolling mill maintenance has been the core of Mull Group since 1961. We repair or manufacture over 150 mandrels and reels annually across hot mills, cold mills, processing lines, and coating lines. No other single shop in our region has the combined volume, capabilities, tooling, and engineering depth.
When a mandrel leaves our floor, it has been disassembled, inspected, measured, re-engineered where needed, reassembled with in-house bronze components from Nail City Bronze, tested, and documented – in-house. You don’t need three POs to three vendors. You need one call to Mull.
Upgrade work is welcome. If your current mandrel is failing early, we’ll redesign the assembly to match your actual operating load — not the OEM’s assumed load from 1951.
- Three Ways We Deliver
Build it new. Engineer it smarter.
Build New
- Engineered to print or reverse-engineered
- Full traceability and test documentation
- In-house bronze components
- Balance and runout tested before shipment
Engineer & Upgrade
- Reverse engineering from sample or scan
- Capacity upgrade and redesign work
- Failure root-cause analysis
- CAD models, prints, and FEA where needed
Rebuild & Repair
- Drum grinding and hardfacing
- Segment and wedge replacement
- Bronze bushing replacement (in-house)
- Full reassembly, test, and documentation
- Three Ways We Deliver
What we can handle. And then some.
download material grades list →C93200 · C95400 in-house
- Types We Work On
Every mandrel on. every coil line.
Recoiler Mandrels
Uncoiler Mandrels
Tension Mandrels
Stub Mandrels
Clamshell Mandrels
Hot Strip Mandrels
Payoff Reels
Take-Up Reels
- What Powers the Work
Under one roof. Always.
Machining Capacity
In-House Bronze
Mechanical Engineering
- Proof on the Floor
Real mandrels Real tonnage.
Mandrel Rebuild · Hot Strip Mill
Mandrel rebuilt to 4.5M tons of campaign life.
A Southeast Steel Producer was seeing mandrel failures at 800k tons and accepting it as normal. We reverse-engineered the entire mandrel, upgraded material grades, changed parts, and delivered a rebuilt unit that ran over 4x the tonnage as previous rebuilds from other shops.
4.5M Tons
32 Weeks
Steel Making
- 24/7 Emergency Response
