Custom Metal Fabrication · Miami Gardens, Florida

Custom Metal Fabrication

MJM Manufacturing is a custom metal fabricator and precision sheet metal shop in Miami Gardens, Florida. We cut, punch, form, weld, machine, finish and assemble parts to your drawings in one 44,000 sq ft building, from a single prototype to full production, for 650+ active customers across the United States.

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Since 1979|80+ Employees|AS9100 Rev D · ISO 9001:2015|ITAR Registered|100% Made in USA

Overview

A Metal Fabrication Shop That Does the Whole Job

Custom metal fabrication means building a part that exists nowhere but on your drawing. Most jobs need more than one process: a flat blank is laser cut or punched, formed on a press brake, welded, fitted with hardware, finished and inspected. At MJM all of that happens under one roof and one AS9100 Rev D and ISO 9001:2015 quality system, so you place one purchase order and deal with one team.

We are family owned and have been fabricating metal in South Florida since 1979. Our customers are OEMs and industrial equipment builders, data center and medical device companies, robotics, energy, transportation, marine and architectural firms, and aerospace and defense contractors. See the industries we serve.

Capabilities

What Our Metal Fabricators Do In-House

Laser Cutting

Five amada lasers (one ventis 4 kw fiber, three ensis 3 kw fiber and one co2) on 5 x 10 ft tables. Mild steel to 1 in., stainless and aluminum to 5/8 in., copper and brass to 3/8 in., held to ±0.005 in. Laser cutting.

CNC Punching

Amada AE 2610NT turret punch with 794 standard and special tools for holes, louvers, embosses and knockouts. CNC punching.

Forming and Rolling

Nine Amada press brakes, the largest 240 tons and 14 ft, plus three plate rollers to 7 ft. Forming.

Welding

Nine fiber laser welders, TIG, MIG and resistance spot welding to AWS D17.1, D1.1, D1.2 and D9.1M. Welding.

CNC Machining

Mazak CNC machining center, lathe, tapping and sawing for machined features on fabricated parts. Machining.

Hardware and Assembly

Four Haeger presses and automated insertion for PEM fasteners, then mechanical assembly to your bill of materials. Hardware insertion.

Finishing

Deburring and laser marking, then powder coat, paint, anodize, plating or passivation so parts arrive finished. Finishing.

Inspection

Amada Fabri-Vision optical inspection, Keyence LM-X and a Keyence XM-5000 portable CMM, with first article reports and certificates of conformance.

Materials

Metals We Fabricate

Carbon steel: cold rolled, hot rolled, galvanized and galvanneal sheet and plate
Stainless steel: 304, 316 and other grades. See stainless steel fabrication
Aluminum: 5052, 6061, 3003 and 2024. See aluminum fabrication
Copper alloys and specialty: copper, brass, beryllium copper and titanium
Non-metals: polycarbonate, G-10 / FR4 and Delrin

All raw material is US-sourced with mill certifications. Full list on the materials page.

What We Build

Typical Custom Fabricated Parts

Enclosures and Cabinets

Electrical and electronics enclosures, control boxes, 19-inch racks and kiosks. See electrical enclosure fabrication.

Chassis and Panels

Power supply chassis, covers, doors, front panels and perforated panels. See chassis fabrication.

Brackets and Frames

Mounting brackets, gussets, base plates, welded frames, stands and carts.

Assemblies

Welded and mechanically assembled units with hardware, hinges and gaskets installed, kitted and packed to your instructions.

How to Buy

From Drawing to Dock

Send files: a STEP model and PDF drawing with material, quantity and finish. See what to send for a quote.
Quote in 24 to 48 hours with a free design-for-manufacturability review.
No minimum order. One prototype, a pilot run or production releases.
Typical lead time 3 to 4 weeks, with expedited work available. See quick-turn fabrication.
Ships anywhere in the US, FOB Miami. Local delivery and pickup across South Florida.

Straight Talk

Where MJM Is Not the Right Fit

We are a precision sheet metal and plate shop, not a structural steel erector or an ornamental iron shop. Building beams, field welding and railings installed on site belong with other fabricators.

Where we win is precision work that needs several processes and paperwork: cut, formed, welded and finished parts and assemblies with tight tolerances, repeatable from the first piece to the ten-thousandth.

FAQ

Custom Metal Fabrication Questions

What is custom metal fabrication?

Custom metal fabrication is building metal parts and assemblies to a customer drawing rather than selling stock items. It usually combines cutting, forming, welding, hardware insertion, finishing and inspection. MJM Manufacturing performs these processes at its facility in Miami Gardens, Florida.

Is MJM a metal fabricator or a sheet metal shop?

Both. MJM is a precision sheet metal shop that also cuts plate to 1 in. mild steel, welds structural and sheet metal assemblies, machines features and assembles finished products, so it works as a full custom metal fabricator.

Is there a minimum order for custom metal fabrication?

No. MJM builds single prototypes, small pilot runs and full production on the same equipment.

How fast can I get a metal fabrication quote?

Most quotes are returned in 24 to 48 hours. Send a STEP file and PDF drawing with material, quantity and finish to sales@mjmmfg.com.

What areas does MJM serve?

MJM is located at 5205 NW 161 Street, Miami Gardens, FL 33014 and serves Miami, Fort Lauderdale and the rest of Florida directly, and ships to customers across the United States.

What certifications does MJM hold?

MJM is AS9100 Rev D and ISO 9001:2015 certified, ITAR registered, and welds to AWS D17.1, D1.1, D1.2 and D9.1M. It is a minority-owned small business with NMSDC MBE and DBE certifications.

Laser Cutting Services: five Amada lasers, mild steel to 1 in., stainless and aluminum to 5/8 in.
Welding Services: fiber laser, TIG, MIG and spot welding to AWS D17.1, D1.1, D1.2 and D9.1M.
Precision Forming and Press Brake: nine Amada press brakes to 240 tons and 14 ft.
Electrical Enclosure Fabrication: NEMA-type boxes, cabinets and panels built to print.
Stainless Steel Fabrication: 304 and 316 cut, formed, welded and finished.
Aluminum Fabrication: 5052 and 6061 cut, formed, welded and finished.
Equipment and Machinery: the full machine list.

Send Us Your Drawings

STEP files and PDF drawings to sales@mjmmfg.com or (305) 620-2020. Quotes in 24 to 48 hours.

Request a Quote Contact Us

Ronald Travieso

Working with MJM Manufacturing has been one of the best vendor experiences I've had. The parts matched my samples perfectly, and even the packing was done with real care — clean, organized, and professional. Of all the vendors I've worked with, they're by far the most organized and quality-focused. Great communication from start to finish. Highly recommend them for custom fabrication work.

Robert Cooler

MJM is wonderful to deal with. They have worked diligently and have produced my projects thus far to the highest standards.

Israel Schechter

I have been ordering parts from MJM Manufacturing for many years, and they have consistently exceeded my expectations. Their quality, professionalism, and attention to detail are outstanding. Every order is handled efficiently, delivered on time, and manufactured to the highest standards. The team at MJM is knowledgeable, responsive, and always willing to go the extra mile to ensure customer satisfaction. It is rare to find a company that maintains such a high level of consistency over many years. I highly recommend MJM Manufacturing to anyone looking for a reliable partner for complex, precision sheet metal parts and assemblies. I. Schechter, Former President of GBI Intralogistics Solutions, Current Owner/President of IPSTEC, Aventura, Florida

Richard Havass

As a customer, I have been working with MJM Manufacturing for approximately 35 years. The expertise of Mike Mijares and his team at MJM is top notch. Whenever I have a new part design, I typically review the design of the part with MJM to ensure that I am using the most cost-efficient manufacturing process to produce the parts as economically as possible. There was a part that we had made years ago using a progressive die to emboss a curved channel into a sheet metal part. The cost of the progressive die for this part was $55K. The redesign of the part from MJM consisted of $1200 in tooling to make the new part profile. Parts came out great and saved tens of thousands in tooling. Lastly, whether MJM produces a prototype or a production run, the appearance of the part is pristine, no tool marks or scratches on any part. In the 35 years that I have worked with Mike and his team, I have found them to be one big family. Mike’s love for his business is refreshing! You rarely see a person that is so charged to get up for work every day! Richard Havass Mechanical Engineering Manager JCI-Sensormatic

Sulen Ojeda Fuentes

Esta fábrica está llena de muy buenos profesionales son una gran familia trabajadores de años con muy buena experiencia .lo recomiendo porque son un gran equipo. Y realizan muy buen trabajo.