Shaft Couplings
Custom shaft couplings produced to close tolerances with accurate bores, keyways, slots, and milled flats completed in controlled setups for dependable fit and torque transmission.
Get precision-made custom machined shaft couplings built for exact fit, torque transfer, and long-term reliability. M.A.R.'s Engineering manufactures coupling components with tight bore tolerances, accurate feature alignment, and in-house finishing options to support prototypes through high-volume production for demanding industrial, aerospace, and equipment applications.
Precision coupling manufacturing supported by in-house machining, finishing, and high-tolerance secondary operations.
Custom shaft couplings produced to close tolerances with accurate bores, keyways, slots, and milled flats completed in controlled setups for dependable fit and torque transmission.
CNC turning supports cylindrical coupling bodies and related components with consistent dimensional relationships across bores, faces, shoulders, and threaded features in prototype or production quantities.
Swiss screw machining is ideal for smaller, intricate coupling elements and precision mating parts that require tight tolerances, complex geometry, and repeatable accuracy in a single setup.
Wire EDM enables sharp internal corners, intricate profiles, and precise features in conductive materials when conventional machining cannot achieve the required geometry.
Centerless grinding delivers ultra-fine finishes and diameter control for shafts and mating components used with couplings where smooth rotation and precise fit are critical.
In-house plating, polishing, deburring, and coating options help improve corrosion resistance, wear performance, and readiness for installation in demanding operating environments.
Custom machined shaft couplings must align accurately, transmit torque reliably, and hold up under real operating loads. M.A.R.'s Engineering produces coupling components with close bore-to-face accuracy, precise secondary features, and material options suited to industrial, transportation, aerospace, and equipment applications. With integrated turning, milling, EDM, grinding, and finishing in one facility, customers gain better consistency, fewer handoff delays, and a smoother path from prototype to repeat production.
Precision components delivered with repeatable quality for demanding production and engineering 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."
Customers rely on M.A.R.'s Engineering for precision machining, responsive production support, and dependable quality control.
Family-owned since 1964 with decades of precision machining knowledge across complex mechanical components.
Turning, EDM, grinding, finishing, and light assembly in one facility reduce delays and vendor handoffs.
ISO compliant processes and full traceability support tight tolerances, repeatability, and documented quality control.
Supports prototypes, short runs, and high-volume production with single and multi-spindle machining capacity.
Built on decades of machining expertise.
M.A.R.'s Engineering Company Inc. has been a family-run precision manufacturer since 1964, when Manuel and Reine Ambrosio founded the business to specialize in close-tolerance screw machining. Over the decades, the company expanded its capabilities through multi-spindle equipment, a dedicated CNC department, and in-house Wire EDM to improve quality control and tooling responsiveness. Today, M.A.R.'s Engineering continues that hands-on manufacturing tradition by helping customers source precision components from one facility instead of coordinating multiple vendors. The company focuses on dependable quality, streamlined project management, and practical production support for prototype work through high-volume manufacturing, serving industries that demand dimensional consistency, traceability, and reliable turnaround.
M.A.R.'s Engineering manufactures custom shaft couplings and related coupling bodies for mechanical, structural, and industrial applications. Capabilities include precision bores, keyways, slots, milled flats, bolt-hole patterns, and custom profiles. Parts can be produced in aluminum, stainless steel, carbon steel, and brass, with machining methods selected based on geometry, tolerance, and production volume.
Talk with our team about tolerances, materials, and production planning.
Supports documented quality and traceability.
Quality compliance for inspection standards.
Strong customer satisfaction signal.
Share your drawing, material requirements, quantities, and tolerance needs. Our team will review your project and respond with next-step guidance.
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.