Chapter 8466 — Customs Tariff Headings

8466.20.00Work holders

8466.30.00Dividing heads and other special attachments for machines

8466.9Other:

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Products classified under Tariff item 84.66

1-8 UNC Self-Opening Die Head

A compact self-opening die head designed for cutting 1-inch 8 UNC threads on Swiss-type CNC lathes and screw machines. It features a quick-change chaser system that reduces setup time, and is specifically designed for automatic thread cutting operations. This product falls under tariff item 8466.10.00 as a self-opening diehead used with machine tools of headings 84.56 to 84.65.

2" Self-Opening Circular Die Head

A precision 2-inch capacity self-opening die head for production threading of pipes and fittings on multi-spindle automatic lathes. It features adjustable lead angles and rapid open/close via cam actuation, making it suitable for high-volume threading operations. This product is classified under tariff item 8466.10.00 as a self-opening diehead for machine tools.

BT40 Tapered Tool Holder

A BT40 tapered shank tool holder for high-precision retention of cutting tools in vertical machining centers. It provides pull-stud retention and high runout accuracy, essential for aerospace and automotive machining applications. This product is classified under tariff item 8466.10.00 as a tool holder for machine tools of heading 84.61.

Carbide Forming Die Tool Holder for Press Brakes

A precision carbide tool holder engineered for securing forming-type dies in hydraulic press brakes of heading 84.62. It features a quick-change mechanism for punch and die sets used in sheet metal bending. This product is classified under tariff item 8466.10.00 as a tool holder for machine tools.

CAT50 V-Flange Tool Holder

A CAT50 V-flange tool holder for large horizontal machining centers handling parts up to 5 tons. It provides a 7:24 taper contact and high torque transmission for heavy roughing operations. This product is classified under tariff item 8466.10.00 as a tool holder for machine tools of heading 84.61.

Die Clamp Holder for Hydraulic Forming Presses

A heavy-duty die clamp tool holder for securing large forming dies in hydraulic presses of heading 84.62. It features a hydraulic clamping mechanism for automotive panel dies. This product is classified under tariff item 8466.10.00 as a tool holder for machine tools.

ER32 Collet Chuck Tool Holder

A precision ER32 collet chuck designed to hold end mills and drills securely in CNC milling machines of heading 84.61. It features a tapered shank for direct mounting on machine spindles and ensures accurate tool positioning. This product is classified under tariff item 8466.10.00 as a tool holder for machine tools.

High-Pressure Coolant Cutting Tool Holder

A cutting tool holder with integrated high-pressure coolant channels for through-tool delivery in machining centers. It is designed for extended tool life with cutting dies under flood coolant conditions. This product is classified under tariff item 8466.10.00 as a tool holder for machine tools.

HSK-A63 Tool Holder

A high-speed HSK-A63 hollow shank tool holder optimized for spindle speeds exceeding 40,000 RPM in 5-axis machining centers. It features a dual-contact interface for superior rigidity and vibration damping. This product is classified under tariff item 8466.10.00 as a tool holder for machine tools.

HSS Cutting Tool Holder for CNC Lathes

A high-speed steel (HSS) tool holder designed specifically to secure cutting-type dies in CNC lathes and turning centers of heading 84.58. It provides precise alignment and clamping for inserts used in metal turning. This product is classified under tariff item 8466.10.00 as a tool holder for machine tools.

Indexable Insert Collet for Swiss-Type Lathes

A precision collet-style tool holder for indexable cutting inserts in Swiss-type CNC lathes of heading 84.58. It is designed for micro-precision turning of medical components. This product is classified under tariff item 8466.10.00 as a tool holder for machine tools.

ISO30 Weldon Shank Tool Holder

An ISO30 taper tool holder with a Weldon 1-inch flat for secure drill mounting in small CNC mills and routers. It balances rigidity with weight reduction for high-speed drilling up to 20,000 RPM. This product is classified under tariff item 8466.10.00 as a tool holder for machine tools of heading 84.61.

NT30 NABOND Tool Holder

An NT30 NABOND dual-contact tool holder combining ISO30 taper with face contact for Japanese machining centers. It provides superior clamping force and runout control for mold and die work. This product is classified under tariff item 8466.10.00 as a tool holder for machine tools.

Self-Opening Die Head 1-1/2"-12 UN

A reversible self-opening die head for automatic thread chasing on CNC lathes, size 1-1/2-inch to 12 UN threads. It opens and closes via spindle rotation without manual intervention, increasing productivity in high-volume screw machining. This product is classified under tariff item 8466.10.00 as a self-opening diehead.

SK40 Modular Tool Holder

A DIN-69871 SK40 steep taper tool holder with a hollow interior for through-tool coolant in European CNC machining centers. The modular design accepts various tool shanks via adapters. This product is classified under tariff item 8466.10.00 as a tool holder for machine tools.

Bevel Gear Generating Head

A rotary work head with a swivel axis designed to hold bevel gear blanks during generating cutting operations on machine-tools of heading 8464. It provides the exact cradle motion required for producing conical gears, ensuring precise tooth geometry. This work holder is essential for the accurate machining of bevel gears.

Cluster Gear Holding Fixture

A multi-station fixture designed to hold cluster gear assemblies during simultaneous hobbing operations on machine-tools of heading 8464. It features individual spindle adjustment for different gear sections, allowing precise positioning and alignment. This work holder enables efficient machining of complex compound gears.

Dividing Head for Gear Shaper

A rotary dividing head attachment that indexes workpieces precisely during gear shaping operations on machines of heading 8464. It is essential for creating accurate gear tooth profiles by ensuring exact angular positioning. This work holder is a critical component for gear manufacturing.

Face Gear Work Arbor

A precision arbor designed for holding face gear blanks during face milling or hobbing operations on machine-tools of heading 8464. It features face driver dogs for efficient torque transmission, ensuring secure workholding. This arbor is essential for accurate face gear production.

Gear Cutting Hob Tool Holder

A precision tool holder designed specifically for securing hobs in gear hobbing machines classified under heading 8464. It ensures accurate alignment and stability during the gear cutting process, contributing to high-quality tooth profiles. This tool holder is a specialized accessory for gear manufacturing.

Gear Shaving Fixture

A custom fixture for holding pre-cut gears during shaving operations on specialized gear finishing machines of heading 8464. It provides exact concentricity for final tooth profile refinement, ensuring high precision. This fixture is essential for achieving the required surface finish and accuracy.

Helical Gear Indexing Arbor

A precision arbor with a helical spline drive for indexing helical gear blanks in hobbing or shaping machines of heading 8464. It compensates for the helix angle during rotation, ensuring accurate tooth alignment. This work holder is essential for producing helical gears with precision.

Hypoid Gear Cradle Fixture

A tilting cradle fixture for holding hypoid gear blanks during generating cutting operations on machine-tools of heading 8464. It provides offset axis motion for hypoid tooth geometry, enabling the production of complex gear profiles. This fixture is a specialized work holder for hypoid gear manufacturing.

Index Plate Set for Gear Hobber

A matched set of index plates and sector plates for precise workpiece rotation in gear hobbing machines of heading 8464. It allows accurate tooth spacing for spur and helical gears, ensuring consistent gear quality. This set is a specialized work holder accessory for gear production.

Module Gear Chuck Adapter

A quick-change adapter plate system that converts standard chucks for metric module gear blanks on hobbing or shaping machines of heading 8464. It accommodates a range of 0.5 to 12 module sizes, providing flexibility in gear production. This adapter is a versatile work holder accessory.

Precision Gear Blank Centering Vise

An air-operated centering vise for automatically trueing gear blanks prior to cutting on machine-tools of heading 8464. Pneumatic actuation ensures high concentricity, improving machining accuracy. This vise is a specialized work holder for gear blank preparation.

Rack Gear Milling Vise

A specialized vise with 90° indexing for holding rack gear blanks during tooth milling on machines of heading 8465. The jaw design accommodates rack module and pitch line requirements, ensuring precise positioning. This vise is a work holder for rack gear production.

Spline Cutting Collet Chuck

A high-precision collet chuck for involute spline cutting on gear cutting machines of heading 8465. Quick-change collets accommodate various spline module sizes, enhancing production efficiency. This chuck is a specialized work holder for spline manufacturing.

Universal Gear Cutter Workholding Chuck

A self-centering chuck optimized for holding gear blanks in hobbing, shaping, and milling machines under headings 8461, 8464, and 8465. It features anti-slip jaws for high-torque gear cutting, ensuring secure workholding. This chuck is a versatile work holder for various gear machining operations.

Worm Gear Hobbing Mandrel

A tapered mandrel with drive flats for holding worm gear blanks during hobbing operations on machine-tools of heading 8464. It is designed for single-threading and multi-start worms, ensuring accurate gear production. This mandrel is a specialized work holder for worm gear manufacturing.

Angle Head Attachment for Machining Centers

An angle head special attachment for machining centers that redirects the spindle axis to 90 degrees, enabling access to undercuts and deep cavities without repositioning. It is a special attachment for machine tools, classified under tariff item 8466.30.00.

Band Saw Resaw Guide Attachment

A precision-machined aluminum guide that mounts to band saws for straight, tall resawing cuts in lumber, stabilizing the workpiece vertically. It is a special attachment for woodworking machines, classified under tariff item 8466.30.00.

CNC Dividing Head for Milling Machines

A precision dividing head designed for use with CNC milling machines, enabling accurate angular indexing and rotation of workpieces for machining complex geometries like gears and splines. It is a special attachment for machine tools, classified under tariff item 8466.30.00.

CNC Router Dust Collection Shroud

A specialized attachment that mounts to CNC woodworking routers to capture and direct wood dust away from the cutting area, improving visibility and safety. It is designed solely for use with woodworking machines, falling under tariff item 8466.30.00.

Drill Press Wood Boring Head

A multi-spur adjustable boring head for clean, precise mortise and tenon holes in woodworking drill presses. It mounts directly to the drill press quill for woodworking machines, classified as a special attachment under tariff item 8466.30.00.

High-Precision Air-Bearing Dividing Head

An air-bearing dividing head for 5-axis machining centers, offering sub-arcsecond accuracy for aerospace and semiconductor applications. It functions as a special attachment for machine tools, falling under tariff item 8466.30.00.

Jointer Fence Micro-Adjustment Kit

A precision micro-adjuster attachment for jointer fences, allowing 0.001-inch incremental angle adjustments for perfect edge jointing. It is a special attachment for woodworking jointers, falling under tariff item 8466.30.00.

Manual Indexing Dividing Head BS-0 Model

The BS-0 manual dividing head is a compact accessory for vertical milling machines, featuring a 3-jaw chuck and worm gear for 360:1 ratio indexing in 2.5-degree increments. It is a special attachment for machine tools, classified under tariff item 8466.30.00.

Miter Saw Laser Guide Attachment

A red laser line generator that clamps to miter saw arms, projecting precise cut lines on wood workpieces for accurate angle cuts. It is exclusively for woodworking miter saws, classified as a special attachment under tariff item 8466.30.00.

Planer Thickness Gauge Digital Readout

A digital display attachment that mounts to thickness planers for precise mm/inch thickness measurement, replacing manual scales. It is solely for woodworking planers, classified as a special precision attachment under tariff item 8466.30.00.

Router Lift Collet Adjustment Mechanism

A mechanical lift system for precise collet height adjustment on router table lifts, enabling bit changes without tools. It is designed exclusively for woodworking router machines, falling under tariff item 8466.30.00.

Semi-Automatic Dividing Head with Pneumatic Clamp

A semi-automatic dividing head for horizontal boring mills, including pneumatic clamping and servo-driven indexing for high-volume production. It qualifies as a special attachment for machine tools under tariff item 8466.30.00.

Shaper Spindle Dust Shield

A transparent polycarbonate shield enclosing shaper spindles to contain wood chips and flying debris during profile cutting. It is custom-fit for woodworking shapers, classified as a special safety attachment under tariff item 8466.30.00.

Table Saw Featherboard Attachment

A safety device with flexible plastic fingers that guides wood stock firmly against the fence on table saws, preventing kickback during ripping operations. It is exclusively compatible with woodworking table saws, falling under tariff item 8466.30.00.

Universal Dividing Head DH-250 for Gear Cutting

The DH-250 universal dividing head supports gear hobbing and shaping machines, with rapid traverse and multiple spindle configurations. It is a dedicated dividing head accessory for machine tools, falling under tariff item 8466.30.00.

Cast Iron Chip Pan for Machining Center

This rough cast iron chip pan is designed to collect metal chips and coolant during machining operations on machines of heading 84.64, such as grinding or polishing machines for mineral materials. It is cleaned and machined only to remove risers and locate assembly points, leaving it unfinished for custom drain integration. As a part specifically for heading 84.64 machines, it falls under tariff item 8466.91.00.

Cast Iron Column Housing for Vertical Machining Center

This cast iron column housing is a structural component for the vertical column of machining centers under heading 84.64, supporting the spindle assembly. It is cleaned and machined only for gate/riser removal and assembly location, remaining unfinished for further processing. As a part of heading 84.64 machines, it is classified under tariff item 8466.91.00.

Cast Iron Coolant Trough Rough Casting

This rough cast iron coolant trough is designed to channel coolant in machines of heading 84.64, preventing thermal damage during grinding operations. It is machined only for sprue removal and base locating pads, remaining unfinished for custom integration. As a part of heading 84.64 machines, it is classified under tariff item 8466.91.00.

Cast Iron Electrical Box Mounting Plate Rough

This rough cast iron plate is designed for mounting electrical enclosures on grinding machine frames of heading 84.64, with only fin removal machining. It supports control boxes safely and is oversized for custom cutouts. As a part of heading 84.64 machines, it falls under tariff item 8466.91.00.

Cast Iron Gib Strip Blank for Machine Slides

These rough cast iron blanks are for gib strips used in slideways of heading 84.64 grinders, with gate removal and edge cleanup machining. They provide adjustable wear surfaces for precise table movement and are supplied oversized for final fitting. As parts of heading 84.64 machines, they are classified under tariff item 8466.91.00.

Cast Iron Headstock Base for Cylindrical Grinder

This cast iron base is for the headstock assembly in cylindrical grinding machines of heading 84.64, cleaned and minimally machined to remove risers for finishing fixture location. It supports the rotating workpiece during OD/ID grinding operations. As a part of heading 84.64 machines, it falls under tariff item 8466.91.00.

Cast Iron Machine Base for CNC Machining Center

This rough cast iron machine base is a foundational mounting component for machines of heading 84.64, such as CNC grinding machines. It is cleaned and minimally machined only to remove casting defects like fins and gates. As a part of heading 84.64 machines, it is classified under tariff item 8466.91.00.

Cast Iron Motor Mounting Bracket Rough

This rough cast iron bracket is for mounting spindle motors in heading 84.64 machines, cleaned and sprue-machined for locator pads only. It provides vibration-damping support and has a final hole pattern to be completed post-import. As a part of heading 84.64 machines, it falls under tariff item 8466.91.00.

Cast Iron Saddle Casting for Grinder Carriage

This cast iron saddle is a sliding structural element for the carriage assembly of precision grinding machines under heading 84.64, with basic cleaning and fin removal machining. It guides workpiece movement and is designed for final machining. As a part of heading 84.64 machines, it is classified under tariff item 8466.91.00.

Cast Iron Spindle Nose Adapter Blank

This rough cast iron blank is for spindle nose adapters used in heading 84.64 machining centers, cleaned and machined only to remove casting fins and permit location in CNC finishing equipment. It interfaces the spindle with tooling. As a part of heading 84.64 machines, it falls under tariff item 8466.91.00.

Cast Iron Splash Guard Base Casting

This cast iron base is for coolant splash guards on grinding machines of heading 84.64, with basic casting cleanup machining. It anchors the protective shield assembly and has rough vertical faces for custom shield attachment. As a part of heading 84.64 machines, it is classified under tariff item 8466.91.00.

Cast Iron Tailstock Base for Grinder

This rough cast iron base is for tailstock support in universal grinders of heading 84.64, machined only for riser removal and fixture pads. It centers long workpieces during grinding and is a blank for quill bore machining. As a part of heading 84.64 machines, it falls under tariff item 8466.91.00.

Cast Iron Way Cover Housing

This cast iron housing is for slideway protective covers on heading 84.64 machines, cleaned and gate-machined minimally. It protects precision ways from chip and coolant damage and is rough for telescopic cover assembly. As a part of heading 84.64 machines, it is classified under tariff item 8466.91.00.

Cast Iron Worktable for Surface Grinder

This rough cast iron worktable is for surface grinding machines under heading 84.64, processed only by cleaning and machining to eliminate sprues, risers, and for fixture alignment. It provides the flat working surface for workpiece support. As a part of heading 84.64 machines, it falls under tariff item 8466.91.00.