JR Mach is a premier, trusted manufacturer specializing in heavy steel castings, ductile iron castings, and precision-machined components. With over 30 years of casting expertise combined with advanced machining capabilities, we deliver one-stop, high-performance solutions for high-end equipment industries worldwide.
We offer a diverse range of materials to meet customers’ unique requirements. Our team of highly qualified process engineers, designers, and metallurgists collaborates closely with clients to select optimal material grades. Leveraging advanced technologies such as spectrometric analysis, we ensure the production of tailored, high-quality castings.
As a one-stop solution provider, we integrate sand casting and machining services. Our sand casting capacity spans 50 lbs. to 2,500 lbs, while our machine shop offers specialized turning and milling services. We handle work pieces from ounces up to 600 lbs, manufacturing parts with intricate geometries and details while maintaining exceptional precision and accuracy.
Rooted in decades of technical proficiency, we are dedicated to serving global sectors that demand uncompromising quality, reliability, and engineering excellence for critical components. Our mission is to produce robust, precision-engineered castings—parts that form the operational backbone of the world’s most demanding industrial applications.
a. Material Flexibility
We work with a wide range of metal (strength, corrosion resistance, heat resistance, etc.): gray iron, ductile iron (nodular iron), carbon steel, alloy steel, stainless steel.
b. Design Collaboration & Optimization
Before production, our engineering team provides DFC (Design for Casting) support to refine your design: optimize part structure to avoid casting defects (e.g., shrinkage, porosity, misrun).
c. Sand Casting Process Control
Sand preparation → Pattern making → Pouring & solidification → Post-casting treatment
We use advanced CNC equipment to achieve the tight tolerances, smooth surfaces, and functional features (e.g., holes, threads, grooves) that sand casting alone cannot deliver.
Our CNC Machining Capabilities:
Equipment: 3-axis, 4-axis, and 5-axis CNC milling machines; CNC lathes ; CNC machining centers.
Tolerance range: As tight as ±0.05mm, meeting industry standards.
Surface finish: Achieve Ra 0.8μm–Ra 6.3μm.
Post-machining treatments: Deburring, chamfering, coating (painting, powder coating, anodizing, plating) to enhance durability and aesthetics.
We’ve been partnering with this factory for years, and their product quality never disappoints. Precise specifications, stable performance, and minimal returns—they are a trustworthy supplier indeed.
Manager
Durability is truly their strong suit! These items have been in daily use for over a year, and they still look and work like new, with no loose parts or performance drop-off. It’s clear that every unit is built to last, and we’ll absolutely be ordering again.
Engineer
