YNF17551 CAT320D sprocket provides stable power transfer with a 21-tooth, 16-hole design for excavator undercarriage systems.
Designed specifically for Caterpillar CAT320D excavators
Heavy-duty 21 teeth and 16-hole mounting pattern
Manufactured using heat-treated alloy steel for long wear life
Ensures smooth engagement with track chains and reduces vibration
Ideal for repair shops, rental fleets, and parts distributors
The YNF17551 sprocket is designed for the CAT320D excavator, providing a reliable and efficient interface between the final drive and track chain. Its 21-tooth structure ensures accurate engagement, while the 16-hole mounting design offers secure installation and superior stability during high-load operations.
Constructed from heat-treated alloy steel, this sprocket delivers excellent resistance to abrasion, impact, and long-term stress—making it suitable for harsh construction, mining, and earthmoving environments. The precision-machined bolt circle ensures proper alignment, reducing wear on the chain and improving undercarriage service life.
With OEM-equivalent dimensions and performance, the YNF17551 sprocket is trusted by excavator maintenance workshops, fleet operators, and undercarriage parts distributors seeking durable, cost-effective replacement solutions.
| Parameter | Details |
|---|---|
| YNF Part Number | YNF17551 |
| Applicable Model | Caterpillar CAT320D |
| Product Type | Undercarriage Drive Sprocket |
| Teeth Count | 21 Teeth |
| Bolt Holes | 16 Holes |
| Material | Heat-treated alloy steel |
| Function | Transfers power from final drive to track chain |
| Resistance | Abrasion, impact, wear |
| Installation | Direct OEM replacement |
| Brand | YNF |
| Origin | China |
| MOQ | 1 Piece |
| Shipping | Sea, Air, Express |
| Payment Terms | T/T, PayPal, Western Union |
| Application Area | Description |
|---|---|
| Excavator Undercarriage System | Provides stable power transfer to track chain |
| Construction Machinery | Designed for heavy-duty, long-hour usage |
| Equipment Overhaul & Service | Replaces worn sprockets for CAT320D |
| Aftermarket Distribution | Suitable for global undercarriage parts suppliers |
Related Products:
CAT320D Track Chain
CAT320D Carrier Roller
Idler for CAT Excavators
Undercarriage Component Kits
FAQs：
Q: Is this sprocket compatible with CAT320D?
A: Yes, it is designed for CAT320D specifications.
Q: How many teeth does it have?
A: 21 teeth.
Q: How many bolt holes?
A: 16 holes.
Q: Is the material heat-treated?
A: Yes, for long-term durability and wear resistance.
The YNF17551 CAT320D sprocket offers strong, reliable power transfer using a tough heat-treated steel structure. Its 21-tooth and 16-hole configuration ensures smooth undercarriage operation and extended chain life. YNF Machinery provides stable supply, consistent quality, and competitive pricing—ideal for distributors, contractors, and fleet repair providers. Contact us today for your quotation.
