BT30 ER20 Collet Chuck Holder, 60 mm Gauge Length
BT30 body with an ER20 collet — the general-purpose milling holder.
BT30 ER20 Collet Chuck Holder, 60 mm Gauge Length
The ER20 collet takes 1–13 mm shanks, which covers most of the end mills and drills a machine of this size runs. At 60 mm gauge length it stays short enough to keep the tool rigid while still clearing the fixture. Balanced G6.3 for 12,000 rpm.
Key Features
Repeatable collet clamping
A DIN 6499 collet grips the full shank length, so runout holds at 0.003 mm and a tool change does not need re-dialling.
One holder, many diameters
ER20 covers 1–13 mm in 0.5 mm steps — one holder replaces a rack of fixed-size end mill holders.
Balanced for spindle speed
G6.3 at 12,000 rpm, so the holder does not cap the machine's top speed.
Technical Specifications
Product Overview
Application Areas
End milling
Drilling and reaming
Chamfer and spot drilling
Small-diameter tooling
General milling work
Packaging & Shipping
Packaging
Export-grade IPPC‑fumigated wooden case packaging with waterproof membrane and shockproof foam. Key components (spindle, control system, guideways) receive additional protective wrapping. Photos of the completed packaging are provided before shipment.
Transportation
We arrange sea, land, or air freight based on equipment size and your delivery timeline. Tracking information is shared as soon as the shipment departs. Please note: actual transit time depends on the shipping route and customs clearance, which are outside our direct control — but we monitor every shipment and keep you updated.
Delivery Time
Production lead time: 20-45 working days for standard configuration machines. Customized equipment lead time is quoted per project. Rush production may be available for urgent orders — please contact us to confirm current factory capacity.
After-sales Service
Installation & Commissioning
We provide detailed installation manuals, step-by-step video guides, and live online support from our engineers to help you install and commission your machine correctly. For complex setups, we can arrange a video call with our technical team to guide your local technicians through the process.
Quality Assurance
12 months warranty for the whole machine, covering manufacturing defects under normal use. Core components (spindle, control system) are covered for 24 months. During the warranty period, we provide replacement parts free of charge; shipping costs and local labor are the customer's responsibility. After the warranty expires, we continue to offer paid spare parts and technical advice.
Technical Training
We provide free operation and maintenance training through detailed video tutorials, user manuals, and live online Q&A sessions with our engineers. If you prefer factory training in China, we can arrange it — travel and accommodation costs are the customer's responsibility.
Technical Support
Our technical team responds within one business day (Monday-Friday, China Standard Time) to emails and messages. For urgent issues, we offer remote video diagnosis and troubleshooting. In critical situations, we can coordinate with the factory engineer to provide specialized support; any on-site service requests will be quoted separately.
What Our Clients Say
"After‑sales service is accessible. Remote guidance support helps our team operate machining equipment correctly from the very beginning."
Nguyen Van Hung
Production Foreman, Consumer‑electronics Parts Plant, Vietnam
"Good value‑for‑money CNC solutions. Botai industrial balances reliable quality and reasonable budget for our medium‑scale manufacturing business."
Petr Novak
Purchasing Manager, Tooling & Fixture Factory, Czech Republic
"Complete shipment documents and clear process guidance simplify our import work of machining equipment."
Javier Tapia
Logistics & Technical Administrator, Import Trading Company, Chile
Interested in This Product?
Contact our industry specialists for detailed information, customized solutions, and competitive quotations tailored to your market.