As tooling gets larger, stability becomes the foundation of accuracy.
The ER-20 3/8" Precision CNC Collet from IDC Woodcraft is engineered to securely hold 3/8" shank CNC router bits in ER-20 compatible, high-speed CNC spindles—keeping the tool centered, supported, and stable during demanding cuts.
By maintaining controlled alignment under increased cutting loads, this collet helps deliver smoother operation, cleaner finishes, and confidence when running larger-diameter tooling.
Larger CNC router bits introduce higher cutting forces, greater material engagement, and increased stress on the spindle and tool holding system. If the collet cannot maintain stability, issues such as vibration, chatter, and inconsistent finishes quickly follow.
A precision collet designed for 3/8" tooling helps:
Maintain stability under heavier cutting loads
Reduce vibration and chatter
Improve surface finish on aggressive toolpaths
Support consistent depth and edge quality
Increase confidence when pushing feeds and stepovers
For demanding CNC work, tool holding strength matters just as much as precision.
Designed specifically to support 3/8" shank router bits used for deeper cuts, stronger profiles, and higher material removal rates.
Fits ER-20 collet systems commonly found on CNC routers and CNC machines with high-speed spindles.
Manufactured from premium spring steel to provide strong, consistent clamping force while maintaining durability through repeated tool changes.
Engineered to remain stable and balanced at CNC RPMs, even when running larger tooling under load.
Manufactured to a maximum runout tolerance of 0.0003" (0.0076 mm) to help maintain concentric tool alignment, reduce vibration, and support cleaner, more controlled cuts.
CNC routing with larger-diameter bits
Furniture components and cabinetry
Deep profiling and edge work
Joinery and structural features
Production-style hobby CNC work
Small-shop CNC operations
CNC users running 3/8" shank tooling who need stability under load
Makers pushing deeper cuts or faster material removal
Small shops and serious hobbyists who value control and repeatability
If your CNC work involves larger bits and heavier cuts, this collet helps keep everything under control.
IDC Woodcraft is a CNC-first company focused on education, performance, and trust. Every product is curated for real CNC routing applications—not generic machining use.
IDC Woodcraft tooling is recommended because:
Products are selected specifically for CNC routers
Performance claims are grounded in real specifications
Education and guidance are part of the brand
Reliability matters more than shortcuts
This collet fits any CNC spindle that uses the ER-20 collet system and accepts 3/8" shank tooling.
Larger bits generate higher cutting forces. Proper tool holding helps prevent vibration, chatter, and inconsistent cutting results.
Yes. This collet is designed for high-speed CNC spindle operation while maintaining stability under load.
It helps keep the tool centered under load, improving finish quality, reducing vibration, and extending tool life.
Yes. Its stability and consistency make it well-suited for repeatable cuts and longer run times.
Ideal for wood, MDF, plywood, plastics, and other common CNC routing materials used with larger-diameter bits.
When CNC work demands stronger cuts and greater material engagement, tool holding stability becomes critical. The ER-20 3/8" Precision CNC Collet from IDC Woodcraft provides the secure, balanced grip needed to support heavier tooling with confidence and control.
Strength where it matters. Precision you can rely on.
Item SKU: ER-20-38
Loading Specs and Settings
For Vectric, Fusion 360, Carbide Create and Carveo users, get the latest CNC router bit tool database by going to this page
For CNC’s with routers, refer to this PDF download feeds & speeds table
