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U-bolt Assembly Machine Assembly & Fabrication

Machine Assembly and Fabrication

Designing and building machines is one of our many expert services. When a marine industry client had a problem, they turned to JB Tool, Die & Engineering, Inc. for an answer. Beginning with the client’s concept, we engineered a machine that would automate the assembly of nuts onto variable length U-bolts. Using CAD modeling as a first step, we used a variety of our in-house processes, including CNC turning, machining, grinding and welding. Our highly trained automation staff built and programmed the machine’s control system. Once the machine was assembled, the finished product was fully tested and delivered to the client.

The operation of this machine involved creating a multi-step process to produce the final U-bolt assemblies. In building this machine, we worked to tolerances of ±.001″ to maintain that all components would perform up to our high standards.

Additional details on this U-bolt assembly project can be found in the table below or contact us for more information.

U-Bolt Assembly Machine Project Highlights

Capabilities Applied/Processes
(Machining, Molding, Welding, etc...)
Heat Treat
Controls Build & Programming
Assembly and Testing
Tightest Tolerance +/- .001"
Industry for UseMarine
Standards Met
(Customer Supplied Print, ISO, ASTM, etc...)
Customer Specifications
Product NameU-Bolt Assembly Machine
Project ScopeDevelop a machine to automate the assembly of
nuts onto variable length U-Bolts and validate the assembly
Design Work
(CAD Modeling, FEA, etc.)
CAD Modeling, FEA
Operational Description
  • Load 4 infeed tracks with variable length U-Bolts
  • Sense and determine part length
  • Inspect part angle and reject if out of specification
  • Gauge size
  • Feed nuts in 2 infeed tracks
  • Pre-stage nuts and pre-assemble
  • Drive nuts to final length
  • Inspect for nut position & cross-thread failure
  • Unload