551-6551 Planet Gear is a steel drivetrain component used in Caterpillar final-drive planetary gear sets. It has 23 spur gear teeth and measures approximately 250.55 mm in outside diameter, 148.78 mm in inside diameter and 86 mm in width. Designed for CAT 793D and 793F series applications, the gear supports reliable power and torque transmission in heavy-duty mining and off-highway operations.
| Item | Specification |
|---|---|
| Product Name | Planet Gear |
| Part Number | 551-6551 |
| Brand | Caterpillar (CAT) |
| Machine Model | CAT 793D / 793F |
| Weight | 16.4 kg |
| Material | Low Alloy Steel |
| Condition | Brand New – Genuine |
| Warranty | 6 Months |
| Packaging | Standard Export Carton |
| Availability | Generally in stock |
| Origin | China |
The 551-6551 Planet Gear is a precision drivetrain component designed for use in the planetary gear sets of Caterpillar final drives. It plays an important role in transferring torque through the final-drive system while supporting reliable power transmission under demanding operating conditions.
Made from steel, the gear features 23 spur gear teeth and is manufactured to Caterpillar specifications. Its dimensions are approximately 250.55 mm outside diameter, 148.78 mm inside diameter and 86 mm width, providing the required fit within the applicable planetary assembly.
The 551-6551 is officially listed for:
It is also listed under Caterpillar off-highway truck applications including the 793, 793D and 793F. Compatibility should be confirmed against the machine serial number and configuration before ordering.
The 551-6551 is particularly suitable for heavy-duty haulage equipment operating in demanding mining and earthmoving environments.
YLCM provides secure export packaging to protect the planet gear during transportation and storage.
Packaging can be customized according to product dimensions, quantity and shipping requirements.
YLCM offers flexible international transportation solutions:
The most suitable shipping method can be arranged according to destination, order quantity, delivery schedule and cargo requirements.
Q1: What is 551-6551?
A: 551-6551 is a Caterpillar planet gear designed for use in planetary gear sets of final drives.
Q2: Which CAT machines use 551-6551?
A: Caterpillar officially lists 793D, 793F, 793F CMD, 793F OEM and 793F XQ, among other 793-series applications.
Q3: What material is 551-6551 made from?
A: Caterpillar specifies steel, with the detailed material classification listed as low alloy steel.
Q4: How many teeth does the 551-6551 gear have?
A: The gear has 23 spur gear teeth.
Q5: What are the dimensions of 551-6551?
A: The published dimensions are approximately 250.55 mm outside diameter, 148.78 mm inside diameter and 86 mm width.
Q6: Is 551-6551 suitable for CAT 793D?
A: Yes. CAT officially lists the 793D among the compatible truck and off-highway truck models.
Q7: Can YLCM help verify compatibility?
A: Yes. Send the part number, machine model, serial number and required quantity for compatibility verification.
Q8: How can I request a quotation?
A: Contact YLCM with the part number, machine model, quantity and destination. We can check availability, pricing, lead time, packaging and shipping options.
Looking for 551-6551 Planet Gear for CAT 793D or 793F? Contact YLCM for the latest quotation and availability.
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YLCM can assist with compatibility verification, quotation, lead time, export packaging and international logistics.
