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JOHN DEERE THRESHING ELEMENT

POS #1 9 TOOTH SET OF 3 TEBBR2 AH209118-9RB AH216674

Product Code: CMAH2166749RB
$1534.50
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John Deere® Compatible 9-Tooth Chrome Fully Rifled Threshing Element Kit

Restore aggressive threshing performance with this premium aftermarket 9-tooth chrome fully rifled threshing element kit. Designed as a direct replacement for selected John Deere® combine harvesters fitted with TriStream™ (Bullet™) rotors, this kit is engineered for Rotor Position 1, where crop first enters the threshing system.

Each kit contains three heavy-duty mounting bases and three replaceable hardened chrome threshing elements. The fully rifled 9-tooth design provides continuous crop engagement across the complete working surface while the replaceable chrome wear section offers exceptional abrasion resistance and reduced long-term maintenance costs. Built for demanding harvesting conditions, this kit delivers reliable threshing performance and extended service life.

John Deere® OEM Cross-Reference

  • Replaces OEM Part Numbers: AH209118, A-AH209118-9RB, A-TEBBR2
  • Rotor Position: Position 1 (Front Cone)

Rotor Fitment

  • Rotor Type: TriStream™ / Bullet™
  • Rotor Location: Position 1 only.
  • Kit Contents: Three rotor bases, three replaceable chrome threshing elements and assembly hardware.
John Deere® Position 1 Chrome Threshing Element Compatibility
Series Models Rotor Type
John Deere® STS Series 9650, 9750, 9660, 9760, 9860, 9670, 9770, 9870, 9880 TriStream™ / Bullet™
John Deere® S6 Series S650, S660, S670, S680, S690 Standard Fitment
John Deere® S7 Series S7 600, S7 700, S7 800, S7 900, S770, S780, S790 Standard Fitment


Technical Specifications

  • Premium aftermarket high-wear threshing element kit.
  • Fully rifled 9-tooth chrome threshing element design.
  • Heavy-duty rotor mounting bases.
  • Replaceable hardened chrome wear elements.
  • Excellent resistance to abrasion and impact.
  • Designed specifically for Rotor Position 1.
  • Suitable for grain and corn harvesting applications.
  • Supplied as a kit of three bases and three chrome threshing elements.
  • Assembly hardware included (rotor mounting fasteners not included).
  • Fast Australia-wide shipping available.

Technical Overview

Rotor Position 1 is the first point of contact between the incoming crop and the threshing system. These elements receive the highest impact loading and play an important role in establishing efficient crop flow into the rotor and concave area. Replacing worn threshing elements helps maintain consistent threshing performance and efficient crop processing.

This kit features a fully rifled 9-tooth chrome threshing element with a continuous working surface for consistent crop engagement. The replaceable chrome wear element provides exceptional wear resistance while allowing future replacement of the wear component without replacing the complete assembly. For a detailed explanation of fully rifled and interrupter-style threshing elements, including operating characteristics, typical crop applications and selection considerations, click the Technical tab.

Installation Tip

Always replace Position 1 threshing elements as a complete set of three to maintain correct rotor balance and consistent threshing performance. Before installation, inspect the mounting bases, clean all mating surfaces and tighten fasteners to the manufacturer's recommended torque specifications.


The C&M Difference

Collier & Miller supplies premium aftermarket threshing components engineered for dependable fit, extended service life and reliable harvesting performance. Our high-wear replacement kits are designed to restore rotor efficiency while helping reduce maintenance costs and minimise downtime during critical harvest periods.

Technical Guide: Fully Rifled and Interrupter Threshing Elements

John Deere® threshing elements are available in different working-surface configurations to change how crop material is moved and disturbed as it passes through the rotor.

The correct element configuration depends on crop type, moisture content, straw condition, threshing difficulty, rotor loading and the required balance between grain separation, throughput and grain quality.

The comparison below explains the general differences between a fully rifled threshing element and an interrupter-style threshing element.

Fully Rifled Threshing Element Interrupter-Style Threshing Element
Fully rifled John Deere compatible threshing element with continuous diagonal ribs across the working surface John Deere compatible interrupter threshing element with diagonal ribs terminating against a raised cross-member

Element Design

A fully rifled element has raised diagonal ribs extending continuously across the working surface. These ribs maintain consistent contact with crop material as it moves through the threshing section.

Element Design

An interrupter-style element combines a rifled working surface with a raised cross-member. The diagonal ribs terminate against this bar rather than continuing across the full working face.

Operating Characteristics

  • Provides continuous threshing action across the working surface.
  • Promotes steady crop movement through the rotor.
  • Maintains consistent contact with the crop mat.
  • Can improve separation in tough or difficult-to-thresh crops.
  • May help reduce crop slippage in green or damp conditions.
  • Supports higher throughput where additional threshing action is required.

Operating Characteristics

  • Interrupts crop movement across the rifled surface.
  • Creates an additional change in crop direction at the cross-member.
  • Produces a more concentrated point of crop disturbance.
  • Can help break apart dense or matted crop material.
  • May increase threshing action at a selected position within the rotor.
  • Provides a different crop-handling effect from a continuously rifled element.

Typical Applications (Guide Only)

The following crop types are general recommendations only. Actual performance will vary according to crop and machine conditions.

  • Wheat
  • Barley
  • Oats
  • Corn or maize
  • Sorghum
  • General cereal and grain crops
  • Rice where the correct rice-specific configuration is fitted

Typical Applications (Guide Only)

The following crop types are general recommendations only. Actual performance will vary according to crop and machine conditions.

  • Tough or high-yield wheat
  • Durum and other hard-to-thresh cereals
  • Canola
  • Green-stem soybeans
  • High-moisture corn or maize
  • Rice in damp or difficult harvesting conditions
  • Crops producing dense or matted straw

Potential Advantages

  • Consistent threshing action across the full working face.
  • Good general-purpose crop movement.
  • Suitable for a broad range of cereal and grain crops.
  • Can assist rotor feeding in green or damp material.

Potential Advantages

  • Creates additional crop disturbance at the cross-member.
  • Can help open dense crop mats.
  • May improve threshing where crop is passing through too smoothly.
  • Can be used strategically as part of a mixed element configuration.

Potential Limitations

  • More aggressive threshing may increase grain damage in fragile crops.
  • Can create additional broken straw and fines.
  • May increase load on the cleaning system if settings are too aggressive.

Potential Limitations

  • Additional crop disturbance may increase straw break-up.
  • Can increase fines or grain damage if incorrectly applied.
  • May not be required where crop flow and separation are already satisfactory.

Configuration Comparison

Feature Fully Rifled Interrupter Style
Working surface Continuous diagonal ribs Diagonal ribs terminating at a raised cross-member
Crop movement Continuous movement across the working face Crop movement is interrupted at the cross-member
Threshing action Consistent across the working surface More concentrated at the interruption point
Typical purpose Promote crop flow and provide consistent threshing action Increase crop disturbance and help break apart dense material
Typical use General cereal and grain harvesting Tough, damp, matted or difficult-to-thresh crop conditions

Guide Only

The crop and application recommendations shown on this page are intended as a general guide only. The optimum threshing element configuration will depend on crop variety, moisture content, straw condition, rotor speed, concave type, concave clearance, feed rate and overall machine setup.

Results may vary between crops, regions and harvesting conditions. Operators should assess grain quality, rotor losses, crop throughput and cleaning-system load when selecting or changing threshing elements.


Selecting the Correct Element

A fully rifled element is generally considered where continuous crop movement and consistent threshing action are required across the working surface.

An interrupter-style element may be considered where additional crop disturbance is required to break apart dense material, alter crop movement or increase threshing action at a selected position within the rotor.

Some machines may use a combination of fully rifled and interrupter-style elements. The number and position of each element should be selected according to the machine model, crop conditions and the required harvesting outcome.

Important Setup Note

Threshing performance is influenced by the complete machine setup, not the threshing element alone. Rotor speed, concave clearance, concave configuration, crop moisture and machine loading should all be checked before changing element configurations.

Machine adjustments should be made gradually while monitoring grain cracking, unthreshed heads, rotor losses, broken straw, fines and cleaning-system performance.

Technical References & Further Reading

This technical guide has been prepared using a combination of original equipment manufacturer (OEM) publications, published agricultural engineering resources and Collier & Miller's engineering experience supporting combine harvesters operating in Australian harvesting conditions.

Reference Description
John Deere® Operator's Manuals Rotor setup, threshing system adjustment and crop-specific operating recommendations.
John Deere® Parts Catalogues (PC Series) Threshing element identification, rotor configurations and compatible component assemblies.
John Deere® Technical Manuals Combine servicing procedures and threshing system maintenance information.
John Deere® Shop.Deere.com Published descriptions of standard, high-wear and rifled threshing elements.
Kondex Corporation® Published technical information relating to aftermarket threshing components and harvesting performance.
University Agricultural Extension Publications Research relating to combine setup, grain quality, threshing efficiency and harvest loss reduction.


Related Technical Guides

  • Understanding John Deere® Threshing Elements
  • Choosing the Correct Concave for Your Crop
  • Rotor Speed and Concave Clearance Explained
  • Reducing Grain Damage During Harvest
  • Improving Combine Throughput in Tough Harvesting Conditions
  • Understanding Crop Flow Through the Rotor

Document Information

Document Type Technical Information Guide
Subject John Deere® Fully Rifled vs Interrupter Threshing Elements
Prepared By Collier & Miller 
Revision Version 1.0
Technical Review July 2026


Engineering Disclaimer

This article is provided for general technical information only and should not be interpreted as a definitive machine setup guide. Harvesting performance is influenced by crop variety, moisture content, straw condition, machine configuration, rotor speed, concave selection, feed rate and operating conditions.

The crop applications shown within this guide are intended as typical examples only and should not be considered prescriptive recommendations. Operators should always refer to the appropriate John Deere® operator's manual and adjust machine settings to suit prevailing harvesting conditions.

John Deere® is a registered trademark of Deere & Company. Reference to OEM part numbers, machine models and trademarks is for identification and compatibility purposes only. Collier & Miller is an independent manufacturer and supplier of aftermarket agricultural replacement parts.

AH216674 DB185 H208187 H212563 TEBBR2 AH209118-9RB
B6:
H7

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