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JLCCAN Help & Tips
Sharp corners or fillets—does the radius really matter in CNC machining? In CNC parts, fillets (rounded corners) aren’t just for looks—they can improve strength, reduce stress concentration, and often make a design easier and cheaper to machine ✅.Especially for internal corners, tool access limits what’s realistically machinable. 🔩A practical design tip: choose a fillet radius that fits a realistic machining approach and inspection needs. 🎯Want the full breakdown? Here it is:👉 https://jlccnc.com/blog/fillet-in-cnc-machining-design-guide #JLCCNC# #cncmachining# #cncknowledge#
CNC Machining
How & when to implement Controlled Impedance. Hello, I wanted to ask a question on how and when to implement controlled impedance on PCB's. This question stems from the fact that on my PCB, there are many signals that I would want to be as accurate as possible and one technique of improving signal integrity was said controlled impedance. Also, for signals such as RF signals, there are required controlled impedances that must be followed in order for the module to effectively communicate. Also, an important question is how is controlled impedance even implemented, as trace length varies between signals alongside other important aspects of a PCB such as the material used to craft it.
PCB
Are JLCCNC aluminum materials 6061 and 7075 in T6 temper? Yes — both 6061 and 7075 are provided in T6.T6 is a heat-treatment condition that gives aluminum significantly improved mechanical properties, making it ideal for structural parts, threaded features, and components that require good dimensional stability.✔ Higher strength✔ Better hardness✔ Improved performance for mechanical parts and precision machiningBuild stronger, machine better — with JLCCNC. 💙
CNC Machining
Metal or Plastic? How to Pick the Right One 🤔 Choosing the right material can make a big difference in your projects — it affects strength, durability, precision, cost, and more. Here’s a quick guide:👉 Harsh operating conditionsUse metal when your part faces heavy loads, wear, or high temperatures.👉 Tighter tolerances requiredMetal maintains precision better, especially for mate or high-precision components.👉 Rapid, low-cost prototypingPlastics like ABS, Nylon, or POM are ideal for functional prototypes that need to be fast and affordable.👉 Insulation or conductivity needsChoose plastic for insulation or metal for conductivity.Not sure which material is right for your project? Upload your model to JLCCNC — our engineers can point you in the right direction with helpful suggestions. Build smarter, choose better. 💙
CNC Machining
Does 45# steel rust easily, and what should I do? Yes — 45# steel is medium carbon steel — strong, moderately tough, and easy to machine. Perfect for shafts, gears, bolts, and other mechanical parts. But it can rust when exposed to air and moisture.You can take simple precautions when ordering and handling:✅ Oiling—Simply add a note when you order to help reduce the risk of rust during shipping or storage.✅ Surface Blackening—Can be selected as a finishing option to form a protective layer against rust. Remember: if the blackened layer wears off, the steel underneath may still rust.💡 Tip: For particularly humid or long-term outdoor use, regular maintenance or additional protective measures are recommended to prolong part life.
CNC Machining
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