Chocks & Housings
Bronze bushings in-house — zero subcontracting
- Core Equipment
Chocks.
Housings.
Bronze in-house.
Bronze in-house.
Bearing chocks, edger housings, and backup chock assemblies — machined to OEM tolerances with Nail City Bronze bushings cast and finished in-house. No subcontracting. No supply-chain risk.
- Our Approach
The chock is where precision meets load. Ours nail both.
A rolling-mill chock is a precision bore holding a heavy bearing under crushing load. The bore tolerance matters, the assembly fit-up matters.
Mull Group machines the chock, welds the bore and liner surfaces, finishes everything in-house, and assembles the unit — all in-house. When we ship a chock, every part of it came from a building within our eight-mile radius. Nothing subcontracted. Nothing we can’t stand behind.
- Three Ways We Deliver
Build new. Re-bush.
Rebuild complete.
01
New Chocks & Housings
Manufactured from print or reverse-engineered design — with matching bronze bushings cast and machined in-house.
- Precision bore to customer tolerance
- Bronze bushings cast at Nail City
- Complete assembly and fit-up test
- Full certification documentation
02
Re-Bushing Service
Strip the worn bushing, cast a matching replacement, bore to spec, and reinstall — all without leaving our campus.
- Matching alloy or upgrade spec
- Custom alloys available on request
- Fast turnaround — bronze on-site
- No supply-chain disruption
03
Full Rebuild
Teardown, magnetic particle inspection, housing rework, new bronze, new seals, reassembly, and documentation.
- Magnetic particle / dye penetrant inspection
- Housing weld repair and re-machining
- New bronze + new seals
- Condition report + photo record
- Specifications
Chock capability. Verified.
Chock TypesBearing · Edger · Backup · AGC
Max Assembly Weight100,000 lb
Bore ToleranceCustomer / OEM print
Primary Bronze Alloys
Download our material grades list → C93200 (SAE 660)
Download our material grades list → C93200 (SAE 660)
High-Load BronzeC95400 (Al-Bronze)
Custom AlloysOn request — 10K+ patterns
InspectionMPI · Dye-Pen · CMM
SubcontractingNone
- Types We Work On
Every chock. Every housing..
Bearing Chocks
Primary roll-neck bearing housings.
Edger Housings
Side-edger assemblies for hot strip mills.
Backup Chocks
Heavy-duty backup roll housings.
AGC Chocks
Automatic Gauge Control bearing housings.
Guide Housings
Strip-guide and entry-guide housings.
Work Roll Chocks
Primary work-roll bearing assemblies.
Coiler Chocks
Mandrel support chock assemblies.
Custom Housings
Engineered-to-order for specialty mills.
