Rail Shafts & Pins
Manufacturing of precision shafts, pins, dowels, and custom profiles for railway assemblies, with tight diameter control, fine finishes, and optional threading, grooves, or cross-drilled features.
M.A.R.'s Engineering manufactures precision bar turned railway components with tight tolerances, repeatable quality, and integrated in-house processes. From prototype development to high-volume production, the team delivers shafts, bushings, fasteners, and custom turned parts backed by decades of machining experience, ISO-compliant quality systems, and streamlined single-source manufacturing.
Precision manufacturing solutions for railway-grade turned parts, from prototypes to repeat high-volume production.
Manufacturing of precision shafts, pins, dowels, and custom profiles for railway assemblies, with tight diameter control, fine finishes, and optional threading, grooves, or cross-drilled features.
Production of plain, flanged, and custom bushings and sleeves for railway equipment requiring close bore tolerances, wear resistance, and dependable fit across demanding service conditions.
High-volume manufacturing of threaded fasteners, studs, inserts, and standoffs for railway applications, with consistent thread accuracy, repeatability, and plating options for corrosion resistance.
Precision turned fittings and connectors for railway fluid, mechanical, and equipment interfaces, produced with complex features such as threads, grooves, ports, and sealing surfaces.
Swiss screw machining for small, intricate railway components that require exceptional dimensional stability, tight tolerances, and multi-operation efficiency in a single setup.
Centerless grinding and finishing services for railway parts needing ultra-fine surface finishes, precise outer diameters, and ready-to-install performance from one manufacturing source.
M.A.R.'s Engineering helps railway OEMs and industrial buyers source precision bar turned components from one experienced manufacturer. With screw machining, CNC turning, Swiss machining, grinding, EDM, and finishing under one roof, the company reduces handoff delays while maintaining close tolerances, traceability, and repeatable quality across prototype, short-run, and high-volume production requirements.
Precision machining support for demanding component programs across prototype and production manufacturing.
"We’ve had an excellent experience working with Mars. Their screw machining capabilities are top‑notch, and the precision of the parts they deliver is consistently impressive. The team is knowledgeable, responsive, and easy to work with, and their experience really shows in the results."
"We’ve had an excellent experience working with Mars. Their screw machining capabilities are top‑notch, and the precision of the parts they deliver is consistently impressive. The team is knowledgeable, responsive, and easy to work with, and their experience really shows in the results."
"We’ve had an excellent experience working with Mars. Their screw machining capabilities are top‑notch, and the precision of the parts they deliver is consistently impressive. The team is knowledgeable, responsive, and easy to work with, and their experience really shows in the results."
Manufacturing buyers rely on proven capability, consistency, and responsive production support.
Family-owned since 1964 with decades of precision screw machining and turned component expertise.
Turning, grinding, EDM, finishing, and light assembly in one facility reduce vendor handoffs.
Single-spindle and multi-spindle equipment support prototypes, repeat orders, and high-volume railway production.
ISO-compliant processes and traceability help maintain dimensional consistency across critical railway components.
Built on family ownership and machining expertise.
M.A.R.'s Engineering Company Inc. was founded in 1964 by Manuel and Reine Ambrosio and has remained family-run ever since. Over the decades, the company expanded from precision screw machining into a broader in-house manufacturing operation with CNC turning, multi-spindle production, centerless grinding, Wire EDM, finishing, and light assembly. That growth was driven by a practical goal: help customers move from prototype to production without the delays and cost of managing multiple vendors. Today, M.A.R.'s Engineering continues that mission by producing close-tolerance components with dependable repeatability, responsive project support, and an ISO-compliant quality approach suited to demanding industries such as transportation, aerospace, electronics, and industrial equipment.
M.A.R.'s Engineering manufactures a wide range of precision turned railway components, including shafts, pins, bushings, sleeves, threaded fasteners, inserts, fittings, connectors, and custom cylindrical parts. The shop supports both simple and multi-feature geometries using CNC turning, screw machining, Swiss machining, grinding, and finishing processes to meet dimensional, surface, and production requirements.
Talk with our team about drawings, tolerances, and production needs.
Quality-focused manufacturing and documented process control.
Compliance for inspection and quality requirements.
Long-standing precision manufacturing experience.
Share your drawings, quantities, materials, and tolerance requirements. Our team will review your project and help identify the right manufacturing approach.
For immediate assistance, feel free to give us a direct call at +1 510-483-0541. You can also send us a quick email at info@marseng.com.
For immediate assistance, feel free to give us a direct call at +1 510-483-0541. You can also send us a quick email at info@marseng.com.