Dongguan Tenghui Rapid Prototype Technology Co.,Ltd

16/09/2025

🌀 How to Design Corner Radius in CNC Machining

When designing internal corners, one golden rule is often overlooked: the tool defines the radius.

🔑 Here’s the key:

The length of a cutting tool should not exceed 6 × its diameter — otherwise it risks vibration or breakage.

Example: if a groove is 28 mm deep → you’ll likely use a tool length ~30 mm.

Tool diameter = 30 ÷ 6 = 5 mm

Which means your minimum internal radius = 2.5 mm

👉 What does this mean for designers?
1️⃣ Avoid designing sharp 90° internal corners — they can’t be machined with standard tools.
2️⃣ The deeper the pocket, the larger the required corner radius.
3️⃣ If your design calls for a smaller radius, be prepared for higher cost (special tools or EDM).

✅ By considering tool geometry early, you can:

Reduce machining costs
Prevent tool breakage
Shorten production time
Improve part reliability

Because in CNC machining, smart corner design = smoother manufacturing.

👉 Do you usually consider tool length-to-diameter ratio when designing deep pockets?

12/09/2025

⚙️ 10 Design Tips for Better CNC Machining

In CNC machining, small design details often decide if your part is made fast, accurate, and affordable — or delayed and over budget. Here are 10 practical tips to keep in mind:

1️⃣ Avoid Overly Tight Tolerances – Only use ±0.01mm where it matters.
2️⃣ Add Chamfers & Fillets – Sharp edges = tool wear & stress.
3️⃣ Keep Wall Thickness Consistent – Prevents warping and cracks.
4️⃣ Minimize Deep Pockets – Consider redesign or assembly.
5️⃣ Standardize Hole Sizes – Stick to common drill diameters.
6️⃣ Avoid Undercuts – They require special tooling.
7️⃣ Think About Fixturing – Simpler setups = better quality.
8️⃣ Choose Material Wisely – Balance cost, machinability & performance.
9️⃣ Optimize Thread Design – Avoid deep threads, use inserts for plastics.
🔟 Surface Finish Matters – Choose based on function, not just looks.

✅ Following these simple principles can:

Reduce machining costs
Shorten delivery time
Improve reliability in production

Because in manufacturing, good design saves money before a single chip is cut.

👉 Which of these design tips do you use most often?

28/07/2025

https://www.linkedin.com/pulse/complete-guide-surface-finishes-cnc-machined-parts-advantages-huang-rkh5c

In the field of precision manufacturing, CNC machining has become a cornerstone of modern industry—and surface finishing serves as the bridge between functionality and aesthetics. Whether your customers are in the medical device, automation, robotics, automotive, or aerospace industries, understan...