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PC400 track rollers (such as part 208-30-00210) made from 40Mn2 or 40MnB steel are high-strength, forged, or cast components designed for Komatsu excavators to provide superior wear resistance and durability in heavy-duty mining and construction applications. These rollers typically feature a surface hardness of HRC 50–58 and a hardened depth of 4–12 mm to withstand significant impact and load-bearing stress.

Material: The body is forged or cast from 40Mn2 or 40MnB (often 50Mn or 40MnB is used in conjunction), which offers high strength and durability, according to WorthPart and Alibaba suppliers.
Hardness & Depth: Surface heat treatment (quenching) achieves HRC 50-58, with a hardened layer depth of 4–10 mm or 8–12 mm.
Internal Component: The center shaft is frequently made of 42CrMo forged steel, offering a higher core hardness (over HRC 28) to resist breakage, per Pingtai Machinery.
Sealing: Specialized sealing (high-sealing aprons or double-lip seals) is used to prevent contamination from dirt and water, according to Pingtai and XMGT.
Technique: Forging is generally preferred for mining-grade rollers for better structural integrity, say Pingtai and ETW International.
Warranty: Many suppliers, including Pingtai and WorthPart, offer a warranty ranging from 6 months to 2 years, often citing 2,000 working hours.

PC400 Carrier Roller Manufacturers 208-30-00320 – Pingtai
Feedback (2) ... The center shaft of the carrier roller material is 42CrMo and forged . The hardness of surface heat treatment can...
www.pingtaimachinery.com
Construction machinery excavator undercarriage parts 50Mn ...
Table_title: Track roller Product Information Table_content: header: | Material | 50Mn/40Mn2 | row: | Material: Colors | 50Mn/40Mn...
Komatsu PC400 Bottom Roller Undercarriage Parts - Alibaba.com
For PC400 Excavator Track Roller Bottom Undercarriage Part 50Mn/40MnB Material HRC50-56 Hardness.
Alibaba.com

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Web results

PC400 Carrier Roller Manufacturers 208-30-00320 - Pingtai

pingtaimachinery.com

https://www.pingtaimachinery.com › pc400-carrier-roller...

pingtaimachinery.com

https://www.pingtaimachinery.com › pc400-carrier-roller...

Komatsu PC400 series undercarriage parts are specifically designed to provide extended life and durability for the toughest working conditions.Read more

Pc400 Excavator Track Rollers(464)

Alibaba.com

https://www.alibaba.com › showroom › pc400-excavat...

Alibaba.com

https://www.alibaba.com › showroom › pc400-excavat...

Discover premium PC400 excavator track rollers with HRC50-58 hardness, forged steel construction, and ISO9001 certification for reliable undercarriage ...

Construction machinery excavator undercarriage parts 50Mn ...

bestpartscn.com

https://www.bestpartscn.com › 50mn40mn2-product

bestpartscn.com

https://www.bestpartscn.com › 50mn40mn2-product

Track roller Product Information Material 50Mn/40Mn2 Finish Smooth Colors Black or yellow Technique Forging casting Surface.

PC240-3/PC300-5/6/PC300-7/PC350/PC400-5/6 for Excavator ...

Made-in-China.com

https://chinaysm.en.made-in-china.com › product › Chi...

Made-in-China.com

https://chinaysm.en.made-in-china.com › product › Chi...

Material, 40MN2 or 50Mn. Surface hardness, HRC 50-58, depth 4-10 mm. Finish, Smooth. Colors, Black or yellow. Technique, Forging or casting.

Track Link PC400-1 PC400-3 PC400-5 - SANQI

bestundercarriageparts.com

https://www.bestundercarriageparts.com › track-link-pc...

bestundercarriageparts.com

https://www.bestundercarriageparts.com › track-link-pc...

our track links are forged with 35Mnb or 40Mn2 which is through a proper heat treatment allowing durability and impact. Our links are highly praised in the ...Read more

Excavator Bottom Roller Track Roller For E320; PC220-5

Xi'an Yingming Machine Co., Ltd.

https://www.ymgmrrackroller.com › product › excavator...

Xi'an Yingming Machine Co., Ltd.

https://www.ymgmrrackroller.com › product › excavator...

The materials avaliable for Track roller and Carrier roller are 40Mn2、40MnB、50Mn,depending on working conditions.The rollers are normalized with precision ...Read more

40Mn2 Steel Undercarriage Track Roller XE950 Excavator ...

Shandong Fivecreation Construction Machinery.Co., Ltd.

https://www.undercarriagetrackroller.com › sale-381115...

Shandong Fivecreation Construction Machinery.Co., Ltd.

https://www.undercarriagetrackroller.com › sale-381115...

Undercarriage Track Roller is a heavy-duty component used in construction and engineering appliions, specifically for bulldozers and other heavy machinery.Read more

PC400 excavator bottom roller

Quanzhou Red Hill Engineering and Machinery Co., Ltd.

https://www.rhundercarriage.com › pc400-excavator-bot...

Quanzhou Red Hill Engineering and Machinery Co., Ltd.

https://www.rhundercarriage.com › pc400-excavator-bot...

PC400 excavator spare part bottom roller · PC400 bottom roller · PC400 undercarriage part track roller · PC400 track roller 40Mn2 · PC400 excavator bottom roller ...

Kuwait Track roller PC400

Fujian Yongsheng Machinery Parts Co., Ltd.

https://www.fj-ysm.com › dtl › Encsprodetail › Kuwait-...

Fujian Yongsheng Machinery Parts Co., Ltd.

https://www.fj-ysm.com › dtl › Encsprodetail › Kuwait-...

We use 40Mn2 original steel for forging, which has excellent density. After heat treatment, the hardness can reach 50-55. Additionally, we employ friction ...Read more

Komatsu track roller assembly factory

DPW-parts

https://www.hangongmachinery.com › 450-Komatsu-Tra...