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High-Tensile Undercarriage Parts Bolt and Nut for Excavator Dozer Grader - China Suppliers and Factory
Overview
This high-tensile Tooth Block Screw (also known as an Adapter Bolt or Segment Bolt) is a critical fastening component designed for heavy-duty earthmoving machinery. It is engineered to securely attach cutting edges, blade segments, and adapter tips to excavator buckets and bulldozer blades. Manufactured to meet rigorous industry standards, this bolt ensures maximum stability and safety in extreme operating conditions.
Key Features
- Superior Material Strength: Forged from high-quality 40Cr Alloy Steel, offering excellent toughness and durability.
- High Hardness Grade: Heat-treated to achieve Grade 12.9 tensile strength, providing exceptional resistance to stretching and deformation.
- Precision Design: Features a specialized head profile (Round/Flat Head with drive slots) designed to sit flush against the blade or adapter, minimizing wear and preventing loosening under high vibration.
- Anti-Corrosion Finish: Treated with a protective coating (black oxide or similar) to resist rust and corrosion in harsh environments.
- Easy Installation: Designed for quick assembly and disassembly, reducing machinery downtime during maintenance.
Technical Specifications
| Product Name | Tooth Block Screw / Adapter Bolt |
| Material | 40Cr Alloy Steel |
| Hardness Grade | 12.9 (High Tensile) |
| Head Type | Round/Flat Head with Drive Slots (as per image) |
| Thread Type | Metric Coarse Thread (Standard for construction machinery) |
| Surface Treatment | Black Oxide / Phosphating / Painted (Customizable) |
| OEM Number Reference | Compatible with standard series (e.g., 114 series, specific numbers depend on exact sizing) |
Applications
Widely used in the undercarriage and ground engaging tools of various construction machinery, including:
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Excavators
Securing bucket adapters and side cutters.
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Bulldozers
Fixing cutting edges and end bits.
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Motor Graders
Attaching blade segments.
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Loaders
Bucket tooth systems.
Frequently Asked Questions (FAQ)
Q What is a Tooth Block Screw (Adapter Bolt) used for?
A Tooth Block Screw, also called an Adapter Bolt or Segment Bolt, is used to securely fasten cutting edges, blade segments, and adapter tips to excavator buckets, bulldozer blades, motor grader blades, and loader buckets in heavy-duty earthmoving applications.
Q What material is this Tooth Block Screw made from?
It is forged from high-quality 40Cr Alloy Steel, which provides excellent toughness, hardness, and durability under extreme working loads and vibration conditions common in construction and mining environments.
Q What does Grade 12.9 hardness mean for this bolt?
Grade 12.9 is the highest standard tensile strength grade for metric bolts. It means the bolt has a minimum tensile strength of 1220 MPa, making it highly resistant to stretching, shearing, and deformation — essential for heavy-duty fastening applications.
Q What surface treatment options are available?
The Tooth Block Screw is available with several surface treatment options including Black Oxide, Phosphating, and Painted finishes. Custom surface treatments can also be arranged based on specific environmental or operational requirements.
Q Is this bolt compatible with standard OEM machinery parts?
Yes, this bolt is compatible with standard OEM series references, including the 114 series and other common construction machinery standards. Specific compatibility depends on the exact sizing required; please contact us with your machine model for confirmation.
Q Can custom specifications be ordered?
Yes, we support custom orders for different thread sizes, head types, lengths, and surface treatments to meet specific machinery requirements. Please provide your technical drawings or OEM part numbers and our team will assist you with a tailored solution.