Swiss Machining
Produce small, complex, high-precision turned parts with guide-bushing support, multi-operation capability, and tolerances as tight as ±0.0001 inches for demanding applications.
M.A.R.'s Engineering delivers tight-tolerance Swiss screw machining and CNC precision machining for complex, small-diameter parts, prototypes, and production runs. Backed by decades of manufacturing experience in San Leandro and the Bay Area, our team supports aerospace, medical, electronics, and defense applications with traceability, consistency, and efficient in-house production.
Precision machining capabilities for miniature parts, production runs, and complex turned components under one roof.
Produce small, complex, high-precision turned parts with guide-bushing support, multi-operation capability, and tolerances as tight as ±0.0001 inches for demanding applications.
Machine cylindrical components such as fittings, bushings, shafts, and threaded parts with consistent dimensional relationships, live tooling, and support for prototype through production quantities.
Cut conductive materials with intricate outlines, sharp internal corners, and repeatable precision, ideal for hardened alloys, detailed features, and custom tooling support.
Manufacture screws, bolts, studs, inserts, and standoffs with accurate thread forms, repeatable dimensions, and efficient production for medium to high-volume runs.
Build micro-scale pins, spacers, contact extensions, and intricate precision parts where conventional machining cannot reliably achieve the required geometry and tolerance.
Complete parts in-house with plating, polishing, deburring, coating, and light assembly services to streamline delivery and maintain quality across production runs.
For buyers who need repeatable accuracy, M.A.R.'s Engineering combines Swiss screw machining, CNC turning, EDM, and in-house finishing to reduce handoffs and protect quality. From San Leandro, the shop supports Bay Area and national manufacturers with miniature, complex components, full traceability, and production flexibility from prototypes to high-volume runs under an ISO-compliant, AS9100-focused quality approach.
See how precision, traceability, and in-house capabilities support demanding production requirements.
"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 machining knowledge across critical industries.
Swiss machining, EDM, finishing, and assembly in one San Leandro facility reduce delays.
ISO-compliant systems support dimensional consistency, documentation, and dependable production control.
From Bay Area prototypes to high-volume runs, equipment supports fast, scalable manufacturing.
Family-run machining expertise since 1964.
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 more complete manufacturing operation by adding multi-spindle capacity, a CNC department, and in-house Wire EDM. Based in San Leandro, the team understands the quality expectations and production demands common across Bay Area manufacturing and aerospace supply chains. That long-term investment in equipment, process control, and customer relationships allows M.A.R.'s Engineering to support everything from prototypes to high-volume production while maintaining close tolerances, responsive service, and dependable traceability.
Swiss screw machining is ideal for small-diameter, long, slender, and highly detailed parts that require tight tolerances and stable repeatability. Common examples include pins, shafts, spacers, threaded components, fittings, and miniature precision parts with cross-holes, grooves, or fine threads. The guide bushing supports the material at the cut point, which helps control deflection and maintain accuracy.
Talk with our machining team about specs, tolerances, and production needs.
Supports documented quality control processes.
Quality compliance for inspection standards.
Aligned for aerospace machining requirements.
Share your drawings, quantities, materials, and tolerance requirements. Our team will review your project and respond with the next steps.
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.