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Home » Products » Arbors » BBT Dual Contact ER Collet Chucks | BBT30 BBT40 BBT50 Tool Holders

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BBT30 BBT40 BBT50 ER Collet Chuck Dualdrive Dual Contact Tool Holder BBT30 BBT40 BBT50 ER Collet Chuck Dualdrive Dual Contact Tool Holder
BBT30 BBT40 BBT50 ER Collet Chuck Dualdrive Dual Contact Tool Holder BBT30 BBT40 BBT50 ER Collet Chuck Dualdrive Dual Contact Tool Holder
BBT30 BBT40 BBT50 ER Collet Chuck Dualdrive Dual Contact Tool Holder BBT30 BBT40 BBT50 ER Collet Chuck Dualdrive Dual Contact Tool Holder

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BBT Dual Contact ER Collet Chucks | BBT30 BBT40 BBT50 Tool Holders

MODEL:
BBT30
BBT40
BBT50
Availability:
Inquire
Maximize your CNC machine's rigidity and precision with our premium BBT Dual Contact ER Collet Chucks. Manufactured by Pingyuan Zhenghao Machinery, these advanced tool holders feature a "Dual Drive" design that ensures simultaneous, flawless contact on both the spindle taper and the spindle face. This dual-contact technology eliminates Z-axis movement at high speeds and drastically reduces vibration during heavy milling operations. Available in BBT30, BBT40, and BBT50 tapers with highly versatile ER collet interfaces (ER11 to ER40), our dynamically balanced BBT holders deliver superior surface finishes, extended cutting tool life, and unmatched repeatability at unbeatable factory-direct prices.

  • BBT30 BBT40 BBT50

  • ZH

  • 84661000

  • Alloy Steel

  • BBT30 BBT40 BBT50 ER Collet Chuck Dualdrive Dual Contact Tool Holder

  • ZH

Product Description

BBT30 BBT40 BBT50 ER Collet Chuck Dualdrive Dual Contact Tool Holder


Features:

1. High stability, power tool holder 

2. For CNC machine tools 

3. models: BBT30, BBT40, BBT50



bbt-er parameter

BBT-ER (2)

Product Overview

Standard BT tool holders rely solely on taper contact. At high spindle speeds (typically over 10,000 RPM), centrifugal force causes the spindle taper to expand slightly, drawing the standard BT holder deeper into the spindle. This results in Z-axis dimensional errors, severe vibration, and fretting damage. The BBT Dual Contact Tool Holder solves this entirely. By making simultaneous contact with the spindle's internal taper and its flat external face, the BBT holder essentially becomes a solid extension of the spindle itself. This extreme rigidity allows for deeper cuts, faster feed rates, and mirror-like surface finishes, making it the ultimate choice for high-speed machining (HSM) and heavy-duty roughing.

Key Features & Advantages

  • Simultaneous Dual Contact: The face and taper contact design provides immense radial and axial rigidity, preventing the tool holder from being pulled into the spindle at high RPMs.

  • Versatile ER Collet System: Utilizes the industry-standard ER collet system (ER11, ER16, ER20, ER25, ER32, ER40), allowing a single chuck to securely clamp a wide range of drills, end mills, and taps.

  • High-Speed Dynamic Balance: Pre-balanced to G2.5 @ 25,000 RPM (or higher upon request), minimizing spindle bearing wear and ensuring smooth, chatter-free cutting at extreme speeds.

  • Ultra-Precision Runout: Precision-ground internally and externally to guarantee a Total Indicator Runout (T.I.R.) of ≤ 0.005mm (5 microns) at the collet nose, significantly improving tool life.

  • Premium Material & Treatment: Forged from high-grade 20CrMnTi alloy steel, deeply case-hardened to HRC 56-58, and cryogenically treated to maintain long-term dimensional stability and accuracy.

Why Partner with Pingyuan Zhenghao Machinery?

  • Direct Manufacturer Savings: Bypass trading companies and source premium dual-contact tool holders directly from our factory for highly competitive wholesale pricing.

  • Comprehensive Size Range: We offer a full range of BBT holders in various gauge lengths (L-lengths) from stubby designs for maximum rigidity to extended lengths for deep cavity reach.

  • AT3 Taper Accuracy: Every taper is precision-ground and rigorously inspected using master taper gauges to ensure it meets or exceeds the strict AT3 tolerance standard.

  • Strict Quality Control: Every holder undergoes strict inspection using 3D CMMs and dynamic balancing machines prior to shipment.

Frequently Asked Questions (FAQ) - Selection Guide

Q1: What is the exact difference between a standard BT and a BBT tool holder?

A: A standard BT holder only makes contact with the inside taper of the spindle, leaving a small gap between the holder's flange and the spindle face. A BBT (Dual Contact) holder is precisely ground so that it makes contact with both the inside taper and the flat face of the spindle simultaneously, providing vastly superior rigidity.

Q2: Can I use a BBT tool holder in a standard BT spindle?

A:Yes, but with a caveat. A BBT holder will fit and function perfectly in a standard BT spindle, but it will only make contact on the taper (just like a standard BT holder). To gain the massive rigidity benefits of the "dual contact" feature, your CNC machine must be equipped with a BBT (Dual Contact) spindle.

Q3: Can I use standard ER collets and nuts with this BBT holder?

A:Yes. The internal clamping mechanism is a standard ER design. You can use standard ER collets, sealed ER collets for through-coolant, and standard ER clamping nuts. However, for high-speed applications, we highly recommend using our precision-balanced ER nuts to maintain the overall G2.5 balance of the assembly.

Q4: Do these holders come with pull studs (retention knobs)?

A:No. Pull stud thread sizes, lengths, and head angles vary wildly between different machine tool builders (even for the exact same taper size like BBT40). You must install the correct, dedicated pull stud for your specific CNC machine into the back of the holder before use.


Eliminate vibration and unlock the true high-speed potential of your CNC machine with our BBT Dual Contact ER Collet Chucks.

Contact our sales team today for a complete catalog, gauge length options, and bulk pricing.