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Komatsu dozer segment teeth, often referred to as sprocket segments or drive segments, are vital undercarriage components designed to drive the track chain. Unlike solid sprockets, these segments come in multiple pieces, allowing for easier replacement without breaking the track, which is particularly beneficial for heavy-duty bulldozers.
Key Features and Specifications:
- Compatibility: Available for a wide range of Komatsu dozers, including D31, D37, D40, D41, D50, D53, D60, D65, D85, D155, and D275 models.
- Material: Usually forged from high-strength alloy steel (e.g., 35MnB, 42SiMnCr) for superior durability and wear resistance.
- Design: Often features 3-hole, 2-teeth or similar configurations, with 9-piece sets being common for larger machines.
- Manufacturing: They are forged, precision-machined, and heat-treated to withstand extreme operating conditions, with tooth profiles engineered for precise engagement with track links.
- Heat Treatment: External teeth are typically induction hardened for maximum surface wear resistance.
Common Part Numbers and Models:
- 131-27-42220: Fits D40A-1, D40PF-1, D45A-1, D50A-16, D53A-16.
- 154-27-12273 / 154-27-71630: Fits D85A-18, D85A-21, D85EX.
- 14X-27-15112: Fits various models including D85ESS-2A.
- 6D4-27-31000: Commonly for D65.
- 155-27-00151: Fits D85A-18/D95S.
Maintenance and Inspection:
- Inspection: Regularly inspect for cracks, uneven wear on the sides or tips of the teeth, and check the tightness of the mounting bolts.
- Wear Factors: Improper track tension, operating on steep slopes, or worn track links can accelerate segment wear.
- Replacement: Segmented sprockets allow for replacing only the worn segments rather than the entire sprocket, reducing maintenance costs.
These segments are available as genuine Komatsu parts or through various aftermarket suppliers.
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Segment Teeth 131-27-42220 for Komatsu Dozer ...
FridayParts
https://www.fridayparts.com › segment-teeth-131-27-4...
FridayParts
https://www.fridayparts.com › segment-teeth-131-27-4...
Prevent premature track wear with our high-strength Segment Teeth. Ensure smooth operation & avoid costly downtime. High quality for For KOMATSU.
$926.50In stock10–18 day delivery90-day returns
Crawler sprockets D155AX-6 segment teeth for ...
Xiamen Fortune Industrial Co., Ltd.
https://www.fortunepart.com › Sprocket and Segments
Xiamen Fortune Industrial Co., Ltd.
https://www.fortunepart.com › Sprocket and Segments
Crawler final drive gear sprockets and segments teeth for Komatsu bulldozer D155AX-6,D275,D355AX-6 undercarriage repair and replacement.Read more
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What are segments on a dozer?
Segments serve the same purpose but come in multiple pieces instead of one solid sprocket ring. They are commonly used on larger crawler dozers and excavators. Benefits include: Easy replacement (single worn segments can be swapped)
The Complete Guide to Sprockets and Segments - MST Parts Group
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Why is the Komatsu D355A so famous?
In 2004, this bulldozer gained infamy through its unconventional use by Marvin Heemeyer during an event in Granby, Colorado. This incident led to the machine earning the nickname "Killdozer," cementing its place in discussions around machinery and its impact on society.Feb 6, 2025
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Is Komatsu Chinese or Japanese?
Japanese
(株式会社小松製作所, Kabushiki-gaisha Komatsu Seisakusho) or Komatsu (コマツ) is a Japanese multinational corporation that manufactures construction, mining, forestry and military heavy equipment, as well as diesel engines and industrial equipment like press machines, lasers and thermoelectric generators.
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https://en.wikipedia.org › wiki › Komatsu_Limited
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Web results
Komatsu D60 D65 Sprocket Segment for ...
gfm parts
https://gfmparts.com › UNDERCARRIAGE › Sprocket
gfm parts
https://gfmparts.com › UNDERCARRIAGE › Sprocket
Our sprocket teeth are made of high-strength alloy steel through precision forging and heat treatment processes. They are one-piece and have excellent wear ...Read more
Komatsu Style Sprockets & Segments
SJ GET Parts
https://www.sj-get.com › Komatsu Style
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https://www.sj-get.com › Komatsu Style
NBSJ offers an extensive range of bucket tooth & adapter, cutting edge & end bit, ground-engaging tools, wear parts, spare parts and attachments for earthmoving ...Read more
Komatsu Bulldozer D85A-18 D85A-21 Sprocket ...
bestundercarriageparts.com
https://www.bestundercarriageparts.com › komatsu-bull...
bestundercarriageparts.com
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segment sprocket teeth is a component of a track system,featuring teeth that engage with the track links,enabling motion in crawler-tracked machinery.Read more
14X-27-15112 Komatsu Teeth
777parts.org
https://www.777parts.org › part-komatsu › teeth
777parts.org
https://www.777parts.org › part-komatsu › teeth
Buy Komatsu Teeth 14X-27-15112 genuine, new aftermarket tractor parts with delivery. TEETH Cross Reference number: Compare Prices:Read more
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KOMATSU D85 Undercarriage Teeth Segment Group ...
Echoo Corporation
https://www.echooparts.com › sale-54558957-oem-154...
Echoo Corporation
https://www.echooparts.com › sale-54558957-oem-154...
High-performance OEM replacement teeth for KOMATSU D85 bulldozer undercarriage. Made from 45Mn steel with HRC52-58 hardness for extreme durability.
D85A-18 segment dozer undercarriage replacement
xtptrack.com
https://www.xtptrack.com › Portfolio
xtptrack.com
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Oct 30, 2025 — Bolt Size (mm):23.50 · Number of Sprocket Bolts: 2 · Number of Sprocket Segments: 2 (One sprocket need 2pcs segment 2hole 2teeth and 7PCS segment ...Read more
Drive Sprocket Segment Group For Komatsu ...
kthpart.com
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The sprocket segment Group,which is also called drive wheel or segment teeth,is one part of undercarriage parts for crawler heavy equipment such as excavator, ...Read more
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