Expert metal fabrication and precision CNC milling services under one roof.
Expert metal fabrication and precision CNC milling services under one roof.
Today's industrial landscape demands expertly crafted metal fab parts, ultra-accurate precision milled parts, and a fully capable CNC parts department to handle complex production requirements.

Hongsinn's Custom CNC Milling Services
Hongsinn offers instant pricing, on-demand lead times, and design-for-manufacturing feedback for custom CNC milled parts for a variety of industries. Regardless of the material or manufacturing process, we can meet your needs. Get your instant quote today!
CNC Milling Tolerances & Standards
| Description | General Tolerance or Standard |
|---|---|
Maximum Part Size | Milled parts up to 80” x 48” x 24” (2,032 x 1,219 x 610 mm). |
Distance Dimensions | For features of size (Length, width, height, diameter) and location (position, concentricity, symmetry) +/- 0.005”. |
Orientation and Form Dimensions | 0-12"+/- 0.005", Angularity 1/2 degree. For 24"and beyond please consult Hongsinn's Manufacturing Standards. |
Precision Tolerances | Hongsinn can manufacture and inspect to tight tolerances, including sub +/- 0.001"tolerances, per your drawing specifications and GD&T callouts. |
Minimum Feature Size | 0.020” (0.50 mm). This may vary depending on part geometry and chosen material. |
Threads and Tapped Holes | Hongsinn can accommodate any standard thread size. We can also machine custom threads; these will require a manual quote review. |
Surface Finish | The standard finish is as-machined: 125 Ra or better. Additional finishing options can be specified when getting a quote. |
Edge Condition | Sharp edges will be broken and deburred by default. Critical edges that must be left sharp should be noted and specified on a print. |
Please check out Hongsinn's Manufacturing Standards for more information on tolerances per process. Unless we have agreed to other tolerances in your Quote, we will work to achieve and hold the tolerances noted.
Processing | CNC Turning, CNC Milling, Laser Cutting, Bending, Spinning, Wire Cutting, Stamping, Electric Discharge Machining (EDM), Injection Molding | |||
Materials | Aluminum: 2000 series, 6000 series, 7075, 5052, etc. | |||
Stainless steel: SUS303, SUS304, SS316, SS316L, 17-4PH, etc. | ||||
Steel: 1214L/1215/1045/4140/SCM440/40CrMo, etc. | ||||
Brass: 260, C360, H59, H60, H62, H63, H65, H68, H70, Bronze, Copper | ||||
Titanium: Grade F1-F5 | ||||
Plastic: Acetal/POM/PA/Nylon/PC/PMMA/PVC/PU/Acrylic/ABS/PTFE/PEEK etc. | ||||
Surface Treatment | Anodized, Bead Blasted, Silk Screen, PVD Plating, Zinc/Nickel/Chrome/Titanium Plating, Brushing, Painting, Powder Coated, Passivation, Electrophoresis, Electro Polishing, Knurl, Laser/Etch/Engrave etc. | |||
Tolerance | ±0.002 ~ ±0.005mm | |||
Surface Roughness | Min Ra 0.1~3.2 | |||
4.Quick proofing, short delivery time, usually is 3-15 days
What is CNC Milling?
G-code also accounts for other factors such as speed, feed rate, and coordination. The complexity of the code generally depends on the number of axes on the milling machine. More axes require more complex G-code, allowing for more intricate machining paths and shapes.
CNC milling machines are primarily used in industrial manufacturing, suited to high-precision and high-intensity machining. CNC routers, on the other hand, are more commonly found in low-volume manufacturing industries, such as woodworking, and are suitable for machining softer materials.

Conclusion
From basic metal fab parts to complex precision milled parts, our full-service CNC parts department provides complete manufacturing solutions for industries demanding quality, precision, and reliability. With capabilities spanning prototyping to high-volume production, we're equipped to handle your most challenging projects.
Ready to discuss your project? Contact our engineering team today for a free DFM analysis and quote.



























