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Excavator Track Guide Idler E300b E325 E330 Front Idler for ...

The Caterpillar E325 idler roller, often manufactured using ZG40Mn (cast manganese steel), is a critical undercarriage component designed to maintain proper track alignment and tension. These idlers are typically created through casting or forging, providing high structural strength to support the heavy weight of excavator equipment.

This video shows an example of a caterpillar undercarriage part:

00:00

Made-in-China.com• May 2, 2026

Key Technical Features: ZG40Mn Idlers

Material: ZG40Mn (Cast Manganese Steel), which provides excellent wear resistance and structural integrity for heavy-duty applications.
Production Method: Generally produced via casting or precision forging.
Hardness: Heat-treated (quenched) to achieve a surface hardness of HRC 50–56, with hardened depth of 8–12mm to resist cracking and collapse.
Design: Often features a central flange to absorb side thrust and maintain alignment, ensuring stable operation.

This video demonstrates the construction and function of an excavator front idler:

00:25

Made-in-China.com• Mar 21, 2026

Specifications and Compatibility

Web results

CAT 325 Idler - WorthPart

WorthPart

http://www.worthpart.com › IDLER-ASSY › productsDe...

WorthPart

http://www.worthpart.com › IDLER-ASSY › productsDe...

40Mn2 ,40MnB. Surface Hardness, HRC52-58. Warranty, 6 months ... Idler roller is precision machined to house special high impact low wear bimetallic bushing.Read more

Caterpillar E325 idler roller ZG40Mn from www.worthpart.com

Missing: ~~E325~~ ‎~~ZG40Mn~~

Caterpiller E325 excavator undercarriage part track roller

Quanzhou Red Hill Engineering and Machinery Co., Ltd.

https://www.rhundercarriage.com › caterpiller-e325-exca...

Quanzhou Red Hill Engineering and Machinery Co., Ltd.

https://www.rhundercarriage.com › caterpiller-e325-exca...

Caterpiller E325 excavator undercarriage part track roller. We produce track rollers for CAT 70B, 305, 302.5, 200B, 320, 325, 330, 345.Read more

Caterpillar E325 idler roller ZG40Mn from www.rhundercarriage.com

Missing: ~~ZG40Mn~~ ‎| Show results with: ZG40Mn

Excavator E325 Track Roller For Caterpillar Undercarriage

WorthPart

http://www.worthpart.com › productsDetail-_425

WorthPart

http://www.worthpart.com › productsDetail-_425

Functions: Support the track as its most between the sprocket and idler. Guide the track between the sprocket and idler. Strength to resist failure before tread ...Read more

Missing: ~~ZG40Mn~~ ‎| Show results with: ZG40Mn

Caterpiller E325 excavator undercarriage part track group

Quanzhou Red Hill Engineering and Machinery Co., Ltd.

https://www.rhundercarriage.com › caterpiller-e325-exca...

Quanzhou Red Hill Engineering and Machinery Co., Ltd.

https://www.rhundercarriage.com › caterpiller-e325-exca...

Caterpiller E325 excavator undercarriage part track group ; Color, Black,yellow ; Material, ZG40Mn ; Method, casting ; Heat Treatment, Yes ; Hardness, HRC51-56.Read more

Idler Wheel

lkparts.com

https://www.lkparts.com › excavator-idler-wheel-front-id...

lkparts.com

https://www.lkparts.com › excavator-idler-wheel-front-id...

Excavator Idler wheel front idler guide roller Laike Construction Machinery ; shell for idler, ZG40Mn ; bolt and nut, 40Cr ; Technical data for Track chain.Read more

Caterpillar E325 idler roller ZG40Mn from www.lkparts.com

Crawler Excavator Parts Idler for E323DL E324D E325 ...

Alibaba.com

https://www.alibaba.com › product-detail › Crawler-Ex...

Alibaba.com

https://www.alibaba.com › product-detail › Crawler-Ex...

Part name. front idler/ idler roller/ idler wheel ; Material. 40Mn2,50Mn/35SiMn ; Finish. Smooth ; Colors. Black or yellow ; Technique. Forging casting.Read more

Missing: ~~ZG40Mn~~ ‎| Show results with: ZG40Mn

7100035 Idler Grp 325 made to fit CATERPILLAR

g&t engine parts

https://gtengineparts.com › caterpillar

g&t engine parts

https://gtengineparts.com › caterpillar

7100035 Idler Grp 325. Price: $1467 Stock: 1 available. Ltd. Warranty: 1 Year. Weight: 374 lbs.

$1,334.00In stock$400 delivery30-day returns

Missing: ~~roller~~ ‎~~ZG40Mn~~

Caterpillar E325 Idler | Excavator Undercarriage Component

constructionparts-en.com

http://constructionparts-en.com › 1-3-2-5-idler

constructionparts-en.com

http://constructionparts-en.com › 1-3-2-5-idler

The idler for Caterpillar E325 excavators delivers stable track alignment and long-term wear resistance, supporting efficient operation in heavy-duty ...