{"product_id":"new-collet-assembly-850412-00308c-dosan-taper","title":"COLLET ASSEMBLY 850412-00308C Dosan Taper","description":"\u003cdiv class=\"koeed-container\" style=\"width:100%;color:#333;line-height:1.7;\"\u003e\n\n  \u003cstyle\u003e\n    .koeed-container h2,\n    .koeed-container h3{\n      color:#16c8c8;\n      margin-top:36px;\n      border-bottom:2px solid #16c8c8;\n      padding-bottom:8px;\n    }\n\n    .koeed-container table{\n      width:100%;\n      border-collapse:collapse;\n    }\n\n    .koeed-container th,\n    .koeed-container td{\n      border:1px solid #eeeeee;\n      padding:10px;\n      text-align:left;\n      vertical-align:top;\n    }\n\n    .koeed-container tr:nth-child(odd){\n      background:#f4fcfc;\n    }\n\n    .koeed-container tr:nth-child(even){\n      background:#fafafa;\n    }\n\n    .koeed-note{\n      background:#f4fcfc;\n      border-left:4px solid #16c8c8;\n      padding:14px;\n      margin:18px 0;\n    }\n\n    .koeed-tag{\n      display:inline-block;\n      background:#16c8c8;\n      color:#fff;\n      padding:4px 10px;\n      margin:4px 6px 4px 0;\n      border-radius:3px;\n    }\n  \u003c\/style\u003e\n\n  \u003ch2\u003eEngineer's Quick Brief\u003c\/h2\u003e\n\n  \u003cul\u003e\n    \u003cli\u003e\n\u003cstrong\u003e850412-00308C\u003c\/strong\u003e is a \u003cstrong\u003eDoosan \/ Daewoo DIN40 taper collet assembly\u003c\/strong\u003e used in CNC automatic tool changer (ATC) gripper systems.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eDesigned for BT40 \/ DIN40 spindle interfaces\u003c\/strong\u003e, this assembly is commonly installed in \u003cstrong\u003eDoosan CMV, HC, MYNX, NM, VC series machining centers\u003c\/strong\u003e.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eMain application:\u003c\/strong\u003e secure retention and release of tool holders during automatic tool exchange cycles in vertical machining centers.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eCritical maintenance role:\u003c\/strong\u003e worn tool grippers can cause tool drop, ATC misalignment, spindle taper damage, or tool unclamp alarms.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003cdiv\u003e\n    \u003cspan class=\"koeed-tag\"\u003eDIN40\u003c\/span\u003e\n    \u003cspan class=\"koeed-tag\"\u003eBT40\u003c\/span\u003e\n    \u003cspan class=\"koeed-tag\"\u003eTool Gripper\u003c\/span\u003e\n    \u003cspan class=\"koeed-tag\"\u003eATC Claw\u003c\/span\u003e\n    \u003cspan class=\"koeed-tag\"\u003eDoosan CNC\u003c\/span\u003e\n    \u003cspan class=\"koeed-tag\"\u003eMachining Center\u003c\/span\u003e\n  \u003c\/div\u003e\n\n  \u003ch2\u003eSEO Introduction\u003c\/h2\u003e\n\n  \u003cp\u003e\n    The \u003cstrong\u003eCOLLET ASSEMBLY 850412-00308C Doosan Taper\u003c\/strong\u003e is a precision CNC tool gripper component used in \u003cstrong\u003eDoosan Daewoo machining centers\u003c\/strong\u003e equipped with \u003cstrong\u003eDIN40 \/ BT40 spindle systems\u003c\/strong\u003e. 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.\n  \u003c\/p\u003e\n\n  \u003cp\u003e\n    The 850412-00308C collet assembly is widely applied in \u003cstrong\u003eDoosan CMV series\u003c\/strong\u003e, \u003cstrong\u003eMYNX series\u003c\/strong\u003e, \u003cstrong\u003eHC series\u003c\/strong\u003e, and related CNC milling platforms. It is commonly referenced as a \u003cstrong\u003etool gripper\u003c\/strong\u003e, \u003cstrong\u003eATC claw\u003c\/strong\u003e, or \u003cstrong\u003eDIN40 taper collet assembly\u003c\/strong\u003e in CNC maintenance documentation and spindle repair workflows.\n  \u003c\/p\u003e\n\n  \u003cp\u003e\n    In industrial environments, this component directly impacts:\n  \u003c\/p\u003e\n\n  \u003cul\u003e\n    \u003cli\u003eAutomatic tool change reliability\u003c\/li\u003e\n    \u003cli\u003eSpindle retention accuracy\u003c\/li\u003e\n    \u003cli\u003eTool holder positioning stability\u003c\/li\u003e\n    \u003cli\u003eHigh-speed machining safety\u003c\/li\u003e\n    \u003cli\u003eTool unclamp consistency\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003ch2\u003eTechnical Specifications\u003c\/h2\u003e\n\n  \u003cdiv style=\"overflow-x:auto;\"\u003e\n\n    \u003ctable\u003e\n      \u003cthead\u003e\n        \u003ctr\u003e\n          \u003cth\u003eParameter\u003c\/th\u003e\n          \u003cth\u003eSpecification\u003c\/th\u003e\n        \u003c\/tr\u003e\n      \u003c\/thead\u003e\n\n      \u003ctbody\u003e\n\n        \u003ctr\u003e\n          \u003ctd\u003e\u003cstrong\u003eProduct Name\u003c\/strong\u003e\u003c\/td\u003e\n          \u003ctd\u003eCollet Assembly \/ Tool Gripper \/ ATC Claw\u003c\/td\u003e\n        \u003c\/tr\u003e\n\n        \u003ctr\u003e\n          \u003ctd\u003e\u003cstrong\u003eManufacturer Compatibility\u003c\/strong\u003e\u003c\/td\u003e\n          \u003ctd\u003eDoosan \/ Daewoo CNC Machine Tools\u003c\/td\u003e\n        \u003c\/tr\u003e\n\n        \u003ctr\u003e\n          \u003ctd\u003e\u003cstrong\u003ePart Number\u003c\/strong\u003e\u003c\/td\u003e\n          \u003ctd\u003e850412-00308C\u003c\/td\u003e\n        \u003c\/tr\u003e\n\n        \u003ctr\u003e\n          \u003ctd\u003e\u003cstrong\u003eUpdated Version\u003c\/strong\u003e\u003c\/td\u003e\n          \u003ctd\u003e850412-00308D\u003c\/td\u003e\n        \u003c\/tr\u003e\n\n        \u003ctr\u003e\n          \u003ctd\u003e\u003cstrong\u003eTaper Type\u003c\/strong\u003e\u003c\/td\u003e\n          \u003ctd\u003eDIN40 \/ BT40\u003c\/td\u003e\n        \u003c\/tr\u003e\n\n        \u003ctr\u003e\n          \u003ctd\u003e\u003cstrong\u003eFunction\u003c\/strong\u003e\u003c\/td\u003e\n          \u003ctd\u003eAutomatic Tool Changer Tool Retention\u003c\/td\u003e\n        \u003c\/tr\u003e\n\n        \u003ctr\u003e\n          \u003ctd\u003e\u003cstrong\u003eApplication Position\u003c\/strong\u003e\u003c\/td\u003e\n          \u003ctd\u003eSpindle Tool Clamping Mechanism\u003c\/td\u003e\n        \u003c\/tr\u003e\n\n        \u003ctr\u003e\n          \u003ctd\u003e\u003cstrong\u003eMachine Type\u003c\/strong\u003e\u003c\/td\u003e\n          \u003ctd\u003eVertical Machining Center (VMC)\u003c\/td\u003e\n        \u003c\/tr\u003e\n\n        \u003ctr\u003e\n          \u003ctd\u003e\u003cstrong\u003eATC Compatibility\u003c\/strong\u003e\u003c\/td\u003e\n          \u003ctd\u003eAutomatic Tool Changer Systems\u003c\/td\u003e\n        \u003c\/tr\u003e\n\n        \u003ctr\u003e\n          \u003ctd\u003e\u003cstrong\u003eTool Holder Compatibility\u003c\/strong\u003e\u003c\/td\u003e\n          \u003ctd\u003eBT40 \/ DIN40 Tool Holders\u003c\/td\u003e\n        \u003c\/tr\u003e\n\n        \u003ctr\u003e\n          \u003ctd\u003e\u003cstrong\u003eMechanical Role\u003c\/strong\u003e\u003c\/td\u003e\n          \u003ctd\u003eRetention Pull-Claw \/ Gripper Mechanism\u003c\/td\u003e\n        \u003c\/tr\u003e\n\n        \u003ctr\u003e\n          \u003ctd\u003e\u003cstrong\u003ePrimary Material\u003c\/strong\u003e\u003c\/td\u003e\n          \u003ctd\u003eHardened Alloy Steel\u003c\/td\u003e\n        \u003c\/tr\u003e\n\n        \u003ctr\u003e\n          \u003ctd\u003e\u003cstrong\u003eWear Resistance\u003c\/strong\u003e\u003c\/td\u003e\n          \u003ctd\u003eHigh-cycle industrial tool change operation\u003c\/td\u003e\n        \u003c\/tr\u003e\n\n        \u003ctr\u003e\n          \u003ctd\u003e\u003cstrong\u003eLubrication Requirement\u003c\/strong\u003e\u003c\/td\u003e\n          \u003ctd\u003ePeriodic spindle mechanism lubrication recommended\u003c\/td\u003e\n        \u003c\/tr\u003e\n\n        \u003ctr\u003e\n          \u003ctd\u003e\u003cstrong\u003eAssociated Maintenance Area\u003c\/strong\u003e\u003c\/td\u003e\n          \u003ctd\u003eSpindle rebuild \/ ATC maintenance\u003c\/td\u003e\n        \u003c\/tr\u003e\n\n        \u003ctr\u003e\n          \u003ctd\u003e\u003cstrong\u003eCommon Failure Symptoms\u003c\/strong\u003e\u003c\/td\u003e\n          \u003ctd\u003e\n            Tool drop, weak retention force, ATC alarm, incomplete unclamp, spindle drawbar instability\n          \u003c\/td\u003e\n        \u003c\/tr\u003e\n\n        \u003ctr\u003e\n          \u003ctd\u003e\u003cstrong\u003eCompatible Series\u003c\/strong\u003e\u003c\/td\u003e\n          \u003ctd\u003e\n            CMV Series, HC Series, MYNX Series, NM Series, VC Series\n          \u003c\/td\u003e\n        \u003c\/tr\u003e\n\n        \u003ctr\u003e\n          \u003ctd\u003e\u003cstrong\u003eAlternative Reference Codes\u003c\/strong\u003e\u003c\/td\u003e\n          \u003ctd\u003e\n            850412-00308, 850412-00308A, 850412-00308B, 850412-00308D, R76441, R76441B, R76441C, AJDO02A0\n          \u003c\/td\u003e\n        \u003c\/tr\u003e\n\n      \u003c\/tbody\u003e\n    \u003c\/table\u003e\n\n  \u003c\/div\u003e\n\n  \u003cdiv class=\"koeed-note\"\u003e\n    \u003cstrong\u003eEngineering Note:\u003c\/strong\u003e 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.\n  \u003c\/div\u003e\n\n  \u003ch2\u003eApplication Matrix\u003c\/h2\u003e\n\n  \u003cdiv style=\"overflow-x:auto;\"\u003e\n\n    \u003ctable\u003e\n      \u003cthead\u003e\n        \u003ctr\u003e\n          \u003cth\u003eIndustrial Scenario\u003c\/th\u003e\n          \u003cth\u003eRole of 850412-00308C\u003c\/th\u003e\n          \u003cth\u003eOperational Benefit\u003c\/th\u003e\n        \u003c\/tr\u003e\n      \u003c\/thead\u003e\n\n      \u003ctbody\u003e\n\n        \u003ctr\u003e\n          \u003ctd\u003eHigh-Speed CNC Milling\u003c\/td\u003e\n          \u003ctd\u003eMaintains secure tool retention during spindle acceleration\u003c\/td\u003e\n          \u003ctd\u003eImproves machining stability\u003c\/td\u003e\n        \u003c\/tr\u003e\n\n        \u003ctr\u003e\n          \u003ctd\u003eAutomatic Tool Change Systems\u003c\/td\u003e\n          \u003ctd\u003eEnables reliable tool gripping and release\u003c\/td\u003e\n          \u003ctd\u003eReduces ATC cycle errors\u003c\/td\u003e\n        \u003c\/tr\u003e\n\n        \u003ctr\u003e\n          \u003ctd\u003e24\/7 Automated Production\u003c\/td\u003e\n          \u003ctd\u003eSupports continuous tool exchange operation\u003c\/td\u003e\n          \u003ctd\u003eMinimizes unplanned downtime\u003c\/td\u003e\n        \u003c\/tr\u003e\n\n        \u003ctr\u003e\n          \u003ctd\u003eSpindle Rebuild Projects\u003c\/td\u003e\n          \u003ctd\u003eReplacement wear component for retention mechanism\u003c\/td\u003e\n          \u003ctd\u003eRestores spindle functionality\u003c\/td\u003e\n        \u003c\/tr\u003e\n\n        \u003ctr\u003e\n          \u003ctd\u003eAerospace Machining\u003c\/td\u003e\n          \u003ctd\u003eSupports precision tool holding\u003c\/td\u003e\n          \u003ctd\u003eImproves dimensional consistency\u003c\/td\u003e\n        \u003c\/tr\u003e\n\n        \u003ctr\u003e\n          \u003ctd\u003eAutomotive Component Manufacturing\u003c\/td\u003e\n          \u003ctd\u003eMaintains high-cycle ATC reliability\u003c\/td\u003e\n          \u003ctd\u003eSupports mass production efficiency\u003c\/td\u003e\n        \u003c\/tr\u003e\n\n      \u003c\/tbody\u003e\n    \u003c\/table\u003e\n\n  \u003c\/div\u003e\n\n  \u003ch2\u003eTroubleshooting \u0026amp; FAQ\u003c\/h2\u003e\n\n  \u003ch3\u003eWhy does the CNC machine drop tools during ATC operation?\u003c\/h3\u003e\n\n  \u003cp\u003e\n    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.\n  \u003c\/p\u003e\n\n  \u003ch3\u003eCan 850412-00308C replace 850412-00308D?\u003c\/h3\u003e\n\n  \u003cp\u003e\n    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.\n  \u003c\/p\u003e\n\n  \u003ch3\u003eWhich Doosan machine series commonly use this collet assembly?\u003c\/h3\u003e\n\n  \u003cp\u003e\n    Reported compatible machine families include:\n  \u003c\/p\u003e\n\n  \u003cul\u003e\n    \u003cli\u003eDoosan CMV Series\u003c\/li\u003e\n    \u003cli\u003eDoosan MYNX Series\u003c\/li\u003e\n    \u003cli\u003eDoosan HC Series\u003c\/li\u003e\n    \u003cli\u003eDoosan NM Series\u003c\/li\u003e\n    \u003cli\u003eDoosan VC Series\u003c\/li\u003e\n    \u003cli\u003eDaewoo DMV Series\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003ch3\u003eWhat maintenance interval is recommended for tool grippers?\u003c\/h3\u003e\n\n  \u003cp\u003e\n    Inspection intervals depend on ATC cycle count and spindle load conditions. High-volume machining centers typically inspect gripper wear during scheduled spindle preventive maintenance.\n  \u003c\/p\u003e\n\n  \u003ch3\u003eWhat symptoms indicate spindle gripper wear?\u003c\/h3\u003e\n\n  \u003cul\u003e\n    \u003cli\u003eRandom ATC alarms\u003c\/li\u003e\n    \u003cli\u003eIncomplete tool release\u003c\/li\u003e\n    \u003cli\u003eExcessive spindle vibration\u003c\/li\u003e\n    \u003cli\u003eTool retention inconsistency\u003c\/li\u003e\n    \u003cli\u003eVisible gripper deformation\u003c\/li\u003e\n    \u003cli\u003eTool pull stud marking damage\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003ch2\u003eCross-Reference \u0026amp; Selection\u003c\/h2\u003e\n\n  \u003ch3\u003eCross-Reference Guide\u003c\/h3\u003e\n\n  \u003cdiv style=\"overflow-x:auto;\"\u003e\n\n    \u003ctable\u003e\n      \u003cthead\u003e\n        \u003ctr\u003e\n          \u003cth\u003eReference Part Number\u003c\/th\u003e\n          \u003cth\u003eDescription\u003c\/th\u003e\n          \u003cth\u003eRelationship\u003c\/th\u003e\n        \u003c\/tr\u003e\n      \u003c\/thead\u003e\n\n      \u003ctbody\u003e\n\n        \u003ctr\u003e\n          \u003ctd\u003e850412-00308\u003c\/td\u003e\n          \u003ctd\u003eEarlier Doosan gripper version\u003c\/td\u003e\n          \u003ctd\u003eBackward reference\u003c\/td\u003e\n        \u003c\/tr\u003e\n\n        \u003ctr\u003e\n          \u003ctd\u003e850412-00308A\u003c\/td\u003e\n          \u003ctd\u003eRevision A variant\u003c\/td\u003e\n          \u003ctd\u003eSeries-compatible\u003c\/td\u003e\n        \u003c\/tr\u003e\n\n        \u003ctr\u003e\n          \u003ctd\u003e850412-00308B\u003c\/td\u003e\n          \u003ctd\u003eRevision B variant\u003c\/td\u003e\n          \u003ctd\u003eSeries-compatible\u003c\/td\u003e\n        \u003c\/tr\u003e\n\n        \u003ctr\u003e\n          \u003ctd\u003e850412-00308D\u003c\/td\u003e\n          \u003ctd\u003eUpdated replacement version\u003c\/td\u003e\n          \u003ctd\u003eForward-compatible\u003c\/td\u003e\n        \u003c\/tr\u003e\n\n        \u003ctr\u003e\n          \u003ctd\u003eR76441\u003c\/td\u003e\n          \u003ctd\u003eCross-reference industrial code\u003c\/td\u003e\n          \u003ctd\u003eEquivalent reference\u003c\/td\u003e\n        \u003c\/tr\u003e\n\n        \u003ctr\u003e\n          \u003ctd\u003eR76441B\u003c\/td\u003e\n          \u003ctd\u003eIndustrial replacement identifier\u003c\/td\u003e\n          \u003ctd\u003eEquivalent reference\u003c\/td\u003e\n        \u003c\/tr\u003e\n\n        \u003ctr\u003e\n          \u003ctd\u003eR76441C\u003c\/td\u003e\n          \u003ctd\u003eUpdated cross-reference code\u003c\/td\u003e\n          \u003ctd\u003eEquivalent reference\u003c\/td\u003e\n        \u003c\/tr\u003e\n\n        \u003ctr\u003e\n          \u003ctd\u003eAJDO02A0\u003c\/td\u003e\n          \u003ctd\u003eAlternative compatible identifier\u003c\/td\u003e\n          \u003ctd\u003eEquivalent reference\u003c\/td\u003e\n        \u003c\/tr\u003e\n\n      \u003c\/tbody\u003e\n    \u003c\/table\u003e\n\n  \u003c\/div\u003e\n\n  \u003cdiv class=\"koeed-note\"\u003e\n    \u003cstrong\u003eSelection Reminder:\u003c\/strong\u003e Always confirm spindle taper type (BT40 \/ DIN40), drawbar interface dimensions, and pull stud retention geometry before replacing ATC gripper assemblies.\n  \u003c\/div\u003e\n\n  \u003cscript type=\"application\/ld+json\"\u003e\n  {\n    \"@context\":\"https:\/\/schema.org\",\n    \"@type\":\"FAQPage\",\n    \"mainEntity\":[\n\n      {\n        \"@type\":\"Question\",\n        \"name\":\"Why does the CNC machine drop tools during ATC operation?\",\n        \"acceptedAnswer\":{\n          \"@type\":\"Answer\",\n          \"text\":\"Common causes include worn gripper fingers, weakened drawbar force, improper pull stud dimensions, or excessive spindle taper contamination.\"\n        }\n      },\n\n      {\n        \"@type\":\"Question\",\n        \"name\":\"Can 850412-00308C replace 850412-00308D?\",\n        \"acceptedAnswer\":{\n          \"@type\":\"Answer\",\n          \"text\":\"Several CNC spare part suppliers identify 850412-00308D as an updated replacement version of 850412-00308C, but compatibility verification is recommended.\"\n        }\n      },\n\n      {\n        \"@type\":\"Question\",\n        \"name\":\"Which Doosan machine series commonly use this collet assembly?\",\n        \"acceptedAnswer\":{\n          \"@type\":\"Answer\",\n          \"text\":\"Compatible machine families include CMV, MYNX, HC, NM, VC, and selected Daewoo DMV series machining centers.\"\n        }\n      },\n\n      {\n        \"@type\":\"Question\",\n        \"name\":\"What maintenance interval is recommended for tool grippers?\",\n        \"acceptedAnswer\":{\n          \"@type\":\"Answer\",\n          \"text\":\"Inspection intervals depend on ATC cycle count, spindle load, and production environment. Preventive spindle maintenance schedules are recommended.\"\n        }\n      },\n\n      {\n        \"@type\":\"Question\",\n        \"name\":\"What symptoms indicate spindle gripper wear?\",\n        \"acceptedAnswer\":{\n          \"@type\":\"Answer\",\n          \"text\":\"Typical symptoms include ATC alarms, inconsistent tool retention, incomplete unclamping, spindle vibration, and visible gripper wear.\"\n        }\n      }\n\n    ]\n  }\n  \u003c\/script\u003e\n\n\u003c\/div\u003e","brand":"COLLET_ASSEMBLY","offers":[{"title":"Default Title","offer_id":44263158841529,"sku":"166365029034","price":844.59,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0268\/8476\/7929\/files\/s-l1600_c518c4ad-2534-4122-b194-43c6afeed9c8.png?v=1723787794","url":"https:\/\/koeed.com\/pt\/products\/new-collet-assembly-850412-00308c-dosan-taper","provider":"KOEED","version":"1.0","type":"link"}