Cummins 6BT Engine Main Bearing & Connecting Rod Bearing 0.25 Undersize for B Series Diesel

Product Details

Product Overview

This high-quality engine bearing set is specifically manufactured for the Cummins 6BT (B Series) diesel engine. Designed as a 0.25mm undersize (0.010″) repair solution, this kit includes both main bearings and connecting rod bearings, providing a complete overhaul solution for worn crankshaft journals. Ideal for industrial, marine, agricultural, and automotive applications, this product is sourced from a leading manufacturer with global export capabilities. We serve major markets including North America, Europe, Southeast Asia, the Middle East, and Africa, ensuring fast and reliable shipping to ports like Houston, Rotterdam, Dubai, and Singapore.

Key Features & Benefits

• Precision Engineering: Manufactured to OEM specifications for exact fit and reliable performance in Cummins 6BT engines.
• Superior Material: Constructed from high-strength steel-backed aluminum alloy or tri-metal layers for excellent fatigue resistance and load-bearing capacity.
• Enhanced Durability: Designed to withstand high compression and extreme operating temperatures, reducing wear on the crankshaft.
• Undersize Solution: The 0.25mm undersize allows for crankshaft journal regrinding, extending engine life without replacing the entire crankshaft.
• Complete Kit: Includes all necessary main and rod bearings for a full engine rebuild, saving time and ensuring component compatibility.

Technical Specifications

OEM Cross-Reference

This bearing set is a direct replacement for the following OEM and aftermarket part numbers:

• Cummins OEM: 3912505, 3912506, 3912507, 3920345
• Main Bearing Set: 3912506 (Std/Undersize)
• Connecting Rod Bearing Set: 3912505 (Std/Undersize)

Compatibility

• Engine Models:
  • Cummins 6BT 5.9L (All variants including 6BTA, 6BTAA)
  • Cummins B Series (Mechanical and Electronic)
• Vehicle Applications:
  • Dodge Ram 2500/3500 (1989-2002)
  • Ford F-Series (with Cummins conversion)
  • Various industrial, marine, and agricultural equipment (Case, New Holland, John Deere, etc.)
• Year Range: 1989 – 2006 (depending on specific application)

Global Supply & Distribution

We are a dedicated supplier of diesel engine components with a robust global logistics network. Our products are shipped worldwide with expedited options available.

• Worldwide Shipping: We ship to over 50 countries via DHL, FedEx, UPS, and sea freight.
• Major Markets: Strong presence in North America (USA, Canada, Mexico), Europe (UK, Germany, Netherlands), Asia-Pacific (Australia, Japan, Singapore), and Middle East (UAE, Saudi Arabia).
• Fast Delivery: Stock items are dispatched within 24-48 hours. Sea freight to major ports typically takes 15-30 days.
• Trade Compliance: All products meet international export standards and include necessary documentation for customs clearance.

Quality Assurance

• Manufacturing Standards: Produced in ISO 9001 certified facilities, adhering to strict quality control processes.
• Testing: Each batch undergoes dimensional, material hardness, and fatigue testing to ensure reliability.
• Warranty: All bearings are backed by a 12-month warranty against manufacturing defects.
• Certification: Compliant with SAE and ASTM standards for engine bearing materials.

FAQ

Q1: What does “0.25 undersize” mean for my Cummins 6BT engine?
A: An undersize bearing is used when the crankshaft journal has been reground due to wear or scoring. The 0.25mm undersize bearing has a slightly thicker wall to compensate for the material removed from the journal, restoring the correct oil clearance and preventing engine knock or failure.

Q2: Is this a complete set for a 6BT rebuild?
A: Yes, this listing includes both the main bearings (7 pieces) and connecting rod bearings (6 pieces) required for a full 6BT engine rebuild. However, you will still need to purchase separate thrust washers and seal rings for a complete bottom-end overhaul.

Q3: How do I verify the correct bearing size for my engine?
A: You must measure the reground crankshaft journal diameter with a micrometer. The 0.25mm undersize is standard for a single regrind. If your journal has been previously ground to 0.50mm, you will need a 0.50mm bearing set. Always check the stamping on the back of the old bearing for size confirmation.