• COLLET ASSEMBLY 850412-00308C Dosan Taper - COLLET ASSEMBLY
  • COLLET ASSEMBLY 850412-00308C Dosan Taper - COLLET ASSEMBLY
  • COLLET ASSEMBLY 850412-00308C Dosan Taper - COLLET ASSEMBLY
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COLLET_ASSEMBLY

COLLET ASSEMBLY 850412-00308C Dosan Taper

COLLET ASSEMBLY 850412-00308C Dosan Taper

$844.59 USD
$844.59 USD $844.59 USD
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Koszt wysyłki obliczony przy realizacji zakupu.
Condition new
MPN 850412-00308C
type Assembly
brand Dosan
model 850412-00308C
taper Taper
length 4.12 inches
diameter 0.850 inches
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Description


COLLET ASSEMBLY 850412-00308C Dosan Taper

The COLLET ASSEMBLY 850412-00308C Dosan Taper provides precise and reliable assembly solutions for industrial applications.

The COLLET ASSEMBLY 850412-00308C Dosan Taper is a precision mechanical assembly tool designed for accurate and efficient assembly operations. It features a high-quality taper design, ensuring durability and reliability in various industrial applications. The 0.850-inch diameter and 4.12-inch length make it suitable for a wide range of assembly tasks. Perfect for use in machine setup, tooling, and manufacturing environments.

Engineer's Quick Brief

  • 850412-00308C is a Doosan / Daewoo DIN40 taper collet assembly used in CNC automatic tool changer (ATC) gripper systems.
  • Designed for BT40 / DIN40 spindle interfaces, this assembly is commonly installed in Doosan CMV, HC, MYNX, NM, VC series machining centers.
  • Main application: secure retention and release of tool holders during automatic tool exchange cycles in vertical machining centers.
  • Critical maintenance role: worn tool grippers can cause tool drop, ATC misalignment, spindle taper damage, or tool unclamp alarms.
DIN40 BT40 Tool Gripper ATC Claw Doosan CNC Machining Center

SEO Introduction

The COLLET ASSEMBLY 850412-00308C Doosan Taper is a precision CNC tool gripper component used in Doosan Daewoo machining centers equipped with DIN40 / BT40 spindle systems. This assembly functions as part of the automatic tool changer (ATC) retention mechanism, ensuring stable tool clamping and reliable tool release during high-speed machining operations.

The 850412-00308C collet assembly is widely applied in Doosan CMV series, MYNX series, HC series, and related CNC milling platforms. It is commonly referenced as a tool gripper, ATC claw, or DIN40 taper collet assembly in CNC maintenance documentation and spindle repair workflows.

In industrial environments, this component directly impacts:

  • Automatic tool change reliability
  • Spindle retention accuracy
  • Tool holder positioning stability
  • High-speed machining safety
  • Tool unclamp consistency

Technical Specifications

Parameter Specification
Product Name Collet Assembly / Tool Gripper / ATC Claw
Manufacturer Compatibility Doosan / Daewoo CNC Machine Tools
Part Number 850412-00308C
Updated Version 850412-00308D
Taper Type DIN40 / BT40
Function Automatic Tool Changer Tool Retention
Application Position Spindle Tool Clamping Mechanism
Machine Type Vertical Machining Center (VMC)
ATC Compatibility Automatic Tool Changer Systems
Tool Holder Compatibility BT40 / DIN40 Tool Holders
Mechanical Role Retention Pull-Claw / Gripper Mechanism
Primary Material Hardened Alloy Steel
Wear Resistance High-cycle industrial tool change operation
Lubrication Requirement Periodic spindle mechanism lubrication recommended
Associated Maintenance Area Spindle rebuild / ATC maintenance
Common Failure Symptoms Tool drop, weak retention force, ATC alarm, incomplete unclamp, spindle drawbar instability
Compatible Series CMV Series, HC Series, MYNX Series, NM Series, VC Series
Alternative Reference Codes 850412-00308, 850412-00308A, 850412-00308B, 850412-00308D, R76441, R76441B, R76441C, AJDO02A0
Engineering Note: Incorrect gripper geometry or excessive wear can damage the spindle taper interface and reduce ATC repeatability. Always verify taper standard and pull-stud compatibility before installation.

Application Matrix

Industrial Scenario Role of 850412-00308C Operational Benefit
High-Speed CNC Milling Maintains secure tool retention during spindle acceleration Improves machining stability
Automatic Tool Change Systems Enables reliable tool gripping and release Reduces ATC cycle errors
24/7 Automated Production Supports continuous tool exchange operation Minimizes unplanned downtime
Spindle Rebuild Projects Replacement wear component for retention mechanism Restores spindle functionality
Aerospace Machining Supports precision tool holding Improves dimensional consistency
Automotive Component Manufacturing Maintains high-cycle ATC reliability Supports mass production efficiency

Troubleshooting & FAQ

Why does the CNC machine drop tools during ATC operation?

Common causes include worn gripper fingers, weakened drawbar force, improper pull stud dimensions, or excessive spindle taper contamination. The 850412-00308C assembly should be inspected for mechanical wear and deformation.

Can 850412-00308C replace 850412-00308D?

Several CNC spare part suppliers list 850412-00308D as an updated or replacement version of 850412-00308C. Compatibility should still be verified against spindle and ATC assembly drawings before installation.

Which Doosan machine series commonly use this collet assembly?

Reported compatible machine families include:

  • Doosan CMV Series
  • Doosan MYNX Series
  • Doosan HC Series
  • Doosan NM Series
  • Doosan VC Series
  • Daewoo DMV Series

What maintenance interval is recommended for tool grippers?

Inspection intervals depend on ATC cycle count and spindle load conditions. High-volume machining centers typically inspect gripper wear during scheduled spindle preventive maintenance.

What symptoms indicate spindle gripper wear?

  • Random ATC alarms
  • Incomplete tool release
  • Excessive spindle vibration
  • Tool retention inconsistency
  • Visible gripper deformation
  • Tool pull stud marking damage

Cross-Reference & Selection

Cross-Reference Guide

Reference Part Number Description Relationship
850412-00308 Earlier Doosan gripper version Backward reference
850412-00308A Revision A variant Series-compatible
850412-00308B Revision B variant Series-compatible
850412-00308D Updated replacement version Forward-compatible
R76441 Cross-reference industrial code Equivalent reference
R76441B Industrial replacement identifier Equivalent reference
R76441C Updated cross-reference code Equivalent reference
AJDO02A0 Alternative compatible identifier Equivalent reference
Selection Reminder: Always confirm spindle taper type (BT40 / DIN40), drawbar interface dimensions, and pull stud retention geometry before replacing ATC gripper assemblies.

About Koeed Automation

Expert Supply Solutions for Global Industrial Electronics

At Koeed.com, we are professional architects of the industrial electronics supply chain. We specialize in providing high-performance PLCs, HMIs, Servo Motors, Drives, and Converters to ensure that modern manufacturing operations remain efficient, reliable, and future-proof in 2026’s competitive landscape.

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We source only 100% authentic industrial hardware from global category leaders. Every component undergoes a rigorous verification process to meet Industry 4.0 reliability standards.

⚙️ Engineering Domain

Our experts provide more than just parts; we offer technical insight. We assist in complex product selection and compatibility audits for both legacy system upgrades and new installations.

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Time is money in industrial automation. Our optimized supply network ensures that critical components reach your facility quickly, significantly reducing unplanned downtime and operational loss.

Strategic Global Portfolio: Siemens, Omron, FANUC, Schneider Electric, Mitsubishi, Yaskawa, Allen-Bradley, and other elite industrial brands.

Supporting your vision for a smarter, more efficient industrial future.

Alternative Names


  • COLLET ASSEMBLY 850412-00308C
  • 850412-00308C Dosan Taper
  • Dosan COLLET ASSEMBLY 850412-00308C
  • 850412-00308C Taper Assembly
  • Precision Assembly Tool 850412-00308C

Special Reminder

Important

If you have any questions about product information and prices, please feel free to contact us by email or WhatsApp. We will respond quickly.

  • Business Days Only (Monday through Saturday)
  • It takes up to 10 days from the time of ordering (excluding Saturdays and Sundays) to the time of delivery to your designated location. Worldwide delivery.
  • Within 3 days after placing the order, we will send you photos and videos of the product via email or WhatsApp for confirmation

International shipping - items may be subject to customs processing depending on the item's customs value.
Sellers declare the item's customs value and must comply with customs declaration laws.
As the buyer, you should be aware of possible:

  • Delays from customs inspection.
  • Import duties and taxes which buyers must pay.
  • Brokerage fees payable at the point of delivery.

Shipping Policy

Global Delivery

We ship to customers all over the world. Our primary logistics providers are DHL, UPS, TNT, FedEx, and EMS.

Processing Time

All orders are processed within 72 hours of purchase. Please note that this applies to business days only.

Shipping Rates & Delivery Estimates

Shipping charges for your order will be calculated and displayed at checkout. Delivery estimates are within 7-14 days. Please note that these shipping times are only estimates and unfortunately, cannot be guaranteed.

Shipment Confirmation & Order Tracking

You will receive a Shipment Confirmation email once your order has shipped containing your tracking number(s). The tracking number will be active within 24 hours.

Customs, Duties, and Taxes

Please note, international shipping services do vary from country to country. To find out the exact services that are available, please put in your full address at checkout. Shipping internationally does mean that you may be required to pay customs and import taxes. All international customers are responsible for the customs rates within their own country. For further information, we recommend contacting your local customs office.

Damages

We take every reasonable precaution to ensure that products are not damaged. If the item is damaged in transit, please immediately contact us. We are not liable for any products damaged or lost during shipping. If you received your order damaged, please contact the shipment carrier to file a claim. Please save all packaging materials and damaged goods before filing a claim.

Force Majeure

When encountering with force majeure, the processing of orders will be delayed. Nevertheless, it is ensured that your order will be processed in a fast manner when weather permits.

Address Verification

Please verify you have the correct shipping address on your order PRIOR to making payment as this is the address we will ship to.

Return Policy

For more information, visit our Return Policy page.

International shipping - items may be subject to customs processing depending on the item's customs value.

Sellers declare the item's customs value and must comply with customs declaration laws.
As the buyer, you should be aware of possible:
• Delays from customs inspection.
• Import duties and taxes which buyers must pay.
• Brokerage fees payable at the point of delivery.

Contact Us

If you have any questions about your order, please contact us at moritta@koeed.com.

Return Policy

Return and Refund Policy

We want you to be completely satisfied with your purchase on our store. If for any reason you are not entirely satisfied, we're here to help!

Returns

You have a generous 30 calendar days to return an item from the date you received it. To be eligible for a return, ensure the item is in its original, unworn, and unused condition with tags and packaging intact. Retain your receipt or proof of purchase for eligibility. Please note that certain items are non-returnable like perishables, custom products, personal care goods, hazardous materials, flammable liquids, and gases. Reach out for clarifications on specific items.

Return Process

Commence the return process by reaching out to us at moritta@koeed.com. Upon approval, we will furnish you with a return shipping label and detailed instructions for dispatching your package. Unnotified returns will not be accepted.

Damages and Issues

Kindly review your order upon delivery. Notify us promptly if it arrives defective, damaged, or incorrect. We will address the matter swiftly.

Exchanges

Facilitate a swift exchange by returning the original item once approved and making a new purchase.

EU 14-Day Cooling Off Period

EU-bound shipments allow a 14-day cancellation or return period without justification. Conditions mirror standard returns.

Refunds

Upon receiving and inspecting your return, we’ll inform you of the refund status. Approved refunds are automatically processed within 10 business days via the initial payment method. Allow time for financial institutions to finalize the refund. For delays exceeding 15 business days post-approval, contact us at moritta@koeed.com.

Shipping

You will be responsible for paying for your own shipping costs for returning your item. Shipping costs are non-refundable. If you receive a refund, the cost of return shipping will be deducted from your refund.

Contact Us

If you have any questions on how to return your item to us, feel free to contact us at moritta@koeed.com.

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