SEO Title: Quenched Forged 40Mn2 Drive Sprocket for 5-80 Ton Excavators
Meta Description: Forged 40Mn2 drive sprocket with 4-8mm medium-frequency quench layer, HRC48-56 tooth hardness, fits CAT, Komatsu, Hitachi and Sany 5-80 ton crawler machines.
URL Slug: /quenched-forged-40mn2-drive-sprocket
Quenched Forged 40Mn2 Drive Sprocket for 5-80 Ton Crawler Machines
A quenched forged drive sprocket made from 40Mn2 steel, formed by integral forging and finished with automatic medium-frequency tooth-surface quenching to a 4-8mm wear-resistant layer. The sprocket transmits drive-wheel power to the track chain, so tooth profile accuracy and core toughness decide how the machine walks under continuous heavy load. Built for 5-80 ton crawler excavators and bulldozers working in mining, quarry and road construction conditions.
Forged 40Mn2 drive sprocket with quenched tooth surface
Key Features
Integral forging body
40Mn2 is forged as one piece, giving a dense metal texture and strong impact resistance, so teeth resist breaking when the track meets rock or hard debris.
4-8mm quenched wear layer
Automatic medium-frequency tooth-surface quenching produces a 4-8mm hardened layer at HRC48-56, keeping the wear surface working longer between replacements.
Precise tooth profile
Machined tooth geometry gives good meshing with the track link and bushing, reducing uneven load on the chain during forward, reverse and steering cycles.
Stocked mainstream models
Inventory covers mainstream CAT, Komatsu, Hitachi, Sany, SDLG and Shantui machine models for fast delivery on repeat orders.
Insured quality
Produced under an ISO9001:2015 quality management system with full-process inspection before shipment, plus a 12-month quality warranty.
Technical Specifications
| Product type | Quenched forged drive sprocket |
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| Raw material | 40Mn2 |
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| Tooth surface hardness | HRC48-56 |
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| Quenching depth | 4-8mm (6-8mm on heavy mining builds) |
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| Load capacity | Fits 5-80 ton machinery |
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| Working temperature | -30°C to 60°C |
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| Heat treatment | Automatic medium-frequency tooth-surface quenching |
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| Quality system | ISO9001:2015, certificate 30324Q20588R1M, valid to 2027-06-05 |
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| Warranty | 12 months |
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Models and Options
Forged sprockets are matched to these machine families:
- CAT: D11T, D10N, D9R, D8T, D475A, D375A, D355A/D275A, D155A, D65A, E390, E374, E349
- Komatsu: PC200, PC650, PC1250, PC2000
- Hitachi: EX1200, EX200
- Sany: SY215, SY375, SY980
- XCMG: XE215, XE335C, XE1250, XE2000
- Also matched for SDLG and Shantui crawler machines
Materials and Structure
40Mn2 is selected for its combination of hardenability and core toughness. The sprocket is integrally forged rather than assembled, so the tooth ring and hub share one continuous grain flow. After machining, the tooth surface alone is induction quenched to a 4-8mm depth, leaving the inner body ductile enough to absorb shock while the working face stays hard. The finished part is checked for dimensions, hardness and surface flaws before packing.
Applications
Mining engineeringRoad constructionEarthmovingQuarry siteLandscapingMunicipal works
The forged sprocket suits open-pit mining, national road reconstruction, urban municipal earthwork and mountain stone quarry work, where machines run 24-hour cyclic operation with frequent forward and reverse walking.
Customization
ODM customization is supported, including free logo engraving and model-specific matching for machines outside the standard stock list. Share your machine brand, model and working condition and the engineering team will confirm the matching tooth count and dimensions.
Case Study
In an Australian open-pit iron ore operation, 5,600 sets of full forged heavy-duty undercarriage were supplied for CAT 6060 excavators and D11T bulldozers. The program used 40Mn2 integral forging with a 6-8mm deep medium-frequency quench layer to resist quartz-bearing ore abrasion and rock impact. Over 22 months of continuous full-load running, service life was 52% longer than ordinary cast undercarriage parts from general suppliers, monthly replacement frequency dropped by more than half, and overall mine equipment maintenance cost fell by 45%. Each batch was supported by raw material spectrum testing and third-party hardness certification.
FAQ
How do I confirm the right sprocket for my machine?Send the machine brand, model and serial or undercarriage part number. The sprocket is then matched against the model list covering CAT, Komatsu, Hitachi, Sany, SDLG, Shantui and XCMG machines from 5 to 80 tons.
What is the difference between this forged version and a cast sprocket?This version is integrally forged from 40Mn2 and then tooth-quenched to 4-8mm depth, which gives a denser structure and higher impact resistance for mining and quarry duty. Cast sprockets are a separate product type for lighter, general duty.
What hardness should I expect on the teeth?Tooth surface hardness is HRC48-56, with a hardened layer depth of 4-8mm depending on the model and duty class.
What working temperature range is it rated for?The sprocket is rated for -30°C to 60°C, covering cold-region winter work and hot open-pit summer conditions.
Is a warranty provided?Yes, a 12-month quality warranty applies, supported by full-process inspection before shipment.
Can you supply a custom marking on the sprocket?Yes, ODM customization with free logo engraving is available. Confirm the artwork and the model before production.
Inquiry Information
Contact: Jenny Zhao | Email: jennyzhao@fcm.net.cn | Tel / WhatsApp: +86 13853728022
Shandong Fivecreation Construction Machinery Co., Ltd. — North End of Meilishan Road, Gaoxin District, Jining City, Shandong Province, China. Send machine model and quantity for a matched quotation.
Image Filename and Alt Suggestions
- drive-sprocket-40mn2-forged-side-view.png — Alt: Forged 40Mn2 drive sprocket for CAT D11T and Komatsu PC2000 crawler machines, side profile view
- drive-sprocket-40mn2-quenched-teeth-detail.png — Alt: Close-up of quenched tooth surface on a 40Mn2 sprocket showing HRC48-56 hardened layer
- drive-sprocket-40mn2-packaging-batch.png — Alt: Batch of forged drive sprockets prepared for shipment in the factory packing area
