MNJ Machining Ltd. serves heavy industry customers across the Greater Toronto Area with precision CNC machining in difficult materials and demanding geometries. We have deep experience with the processes and workholding challenges that hard alloys and complex stock forms present — and we deliver the dimensional accuracy and surface finishes these applications require.
Deep Boring in Hard Materials
Deep boring in high-strength, work-hardening materials demands rigid setups, careful tool selection, and disciplined process control. MNJ has hands-on experience boring in stainless 321H, stainless forgings, Inconel, and Incoloy — materials that punish poor technique. Our DMG CTX-series turning centers with live tooling give us the rigidity and precision needed to hold bore geometry and surface finish over extended depths without chatter or dimensional drift.
Secondary Operations on Castings
Cast components often arrive with difficult datum surfaces, interrupted cuts, hard spots, and tight feature-to-feature relationships. We have extensive experience setting up and machining secondary operations on castings — establishing reliable datums, managing interrupted cutting conditions, and achieving the final tolerances and finishes that casting alone cannot deliver. We work with customers to develop repeatable setups that translate consistently from part to part across a production run.
Materials
Stainless 321H • Stainless forgings (all grades) • Inconel • Incoloy • Cromoly steel • Tool steel • Mild steel • Aluminum • Aluminum bronze • Bearing bronze
Quality & Documentation
All work is inspected using our Mitutoyo Crysta Apex CR574 CMM. Our customer-auditable QMS is compliant with ISO 9001 and CSA Z299.2, with full process documentation and material traceability available on request.
Get a Quote
Send drawings and material specifications to orders@mnjcnc.com or call (416) 419-1651. We respond within 1–2 business days.