Custom TYL V17 Bucket Tooth & 8842-V17 Adapter Assembly

1. V17 Bucket Tooth Overview

The V17 bucket tooth is a “Twin Tiger Long” (TYL) style tooth. The V17 series belongs to the Super V style (or similar helical taper/vertical pin) tooth system, widely used on compact crawler excavators, skid-steer loaders, and mini-excavators (typically in the 1.5-ton to 3.5-ton class).

The core of this system lies in its streamlined nose design and tight fit. The low-profile shape reduces digging resistance; however, for the V17 size class, the greatest manufacturing challenge is ensuring the tooth remains securely attached to the adapter without loosening or detaching under frequent, high-frequency vibration.

1.1 Structural Design

Bifurcated Point: The classic TYL design features two tips—either asymmetrical or symmetrical. This geometry concentrates the excavator’s digging force onto a very small contact area, generating extremely high penetration force per square inch.

1.2 Self-Sharpening Effect:

The cross-section of the V17 bucket tooth tapers from back to front. As the tooth wears and material is lost from the top and bottom surfaces, the tip maintains its sharpness rather than becoming blunt like a standard flat-tipped tooth.

1.3 Applications

Key Advantages:

Extremely compacted hard soil, frozen ground, and gravel-laden shale layers. In these conditions, standard “Long” dirt teeth fail to penetrate, whereas V17 teeth can shatter hard layers like an ice axe.

Not Recommended For:

Operations requiring a flat trench bottom (the twin tips will leave ridges); highly abrasive environments consisting purely of sand or loose stone (the small contact area leads to rapid tip wear).

2. 8842-V17 Adapter: In-Depth Analysis

The 8842-V17 is a critical load-bearing component that connects the bucket’s base edge (lip plate) to the V17 tooth. Structure and Compatibility
Two-Strap / Flush-Mount Design: The 8842-V17 is typically a two-sided, straddle-style adapter (featuring legs that extend over both the top and bottom of the bucket lip). This design evenly distributes the prying forces generated during excavation across both sides of the main cutting edge, preventing the lip from tearing.

Lip Thickness Compatibility: The 8842 model is designed for specific cutting edge thicknesses (the V17 class typically accommodates 12mm–20mm / 0.5″–0.75″). A fit that is too loose results in excessive welding gaps, while a fit that is too tight makes assembly impossible; this places extremely high demands on the manufacturer’s control over internal casting dimensions.

Nose Geometry: The “nose” at the front of the adapter must fit perfectly into the internal cavity of the V17 tooth. The V-series is characterized by multi-surface contact (sometimes featuring a slight helical taper), requiring exceptional dimensional stability.

3. Product Specifications

Parameter	Specification
Product Name	OEM V17 Bucket tooth and 8842-V17 Adapter
Part No	V17 + 8842-V17
Bucket Tooth	V17 TYL
Adapter	8842-V17
Pin/washer	V17 pin
Weigth	1.09kg / 2.4lb
Type	Flex Pin
Colour	Original / Black/ Yellow
Tensile Strength(MPa)	≥1350
Yield Strength(MPa)	≥1100
Impact (J)	≥25
Hardness (HB)	450-520
Materials	Chromium Moly Alloy
Production Processes	Lost-Wax/ Silica Sand
Certificates	IS09001-2005
Heat Treatment	Normalizing, Quenching, Tempering
Application	Compact crawler excavators, skid-steer loaders, and mini-excavators

 

4. Manufacturing and Quality Control Challenges for This Model

As an investment casting foundry with CNC secondary machining capabilities, we offer the following advantages:

4.1 Advantages of Investment Casting for Internal Features

With sand casting, the internal cavities (blind holes) of V17 bucket tooth and the pin holes of 8842 adapters are prone to issues such as incomplete sand removal or dimensional drift.

Truecast Advantage: We utilize precision investment casting (silica sol or composite water-glass processes) to ensure the internal cavities of V17 TYL teeth are perfectly smooth and free of shrinkage voids. This guarantees a contact surface area of ​​over 80% when the tooth is fitted to the adapter, thereby preventing stress concentrations and premature breakage caused by point contact.

4.2 CNC Machining to Improve Assembly Yield

Small excavators operate at high frequencies and experience significant vibration. If the nose dimensions of the 8842-V17 adapter are too large, the tooth cannot be installed; if they are too small, the tooth will wobble during operation, leading to rapid pin shear.

Truecast Advantages: CNC precision machining of the nose mating surfaces and pin holes allows for tight tolerance control. This ensures that every 8842-V17 adapter fits perfectly with standard V17 pins right out of the box, enabling true “Ready-to-Assemble” capability.

4.3 Heat Treatment and Material Composition

V17 Bucket Tooth: Due to the slender profile of the twin-point design, the tip is highly susceptible to breakage upon impact with large boulders. Low-carbon alloy steels containing elements such as boron and molybdenum (e.g., 30CrMo) must be used. Rigorous tempering is applied to achieve an overall hardness of 48–52 HRC while ensuring the core of the tooth tip maintains an ambient-temperature impact toughness of at least 18J.

8842-V17 Adapter: While the adapter does not directly engage in the cutting process, it must withstand immense torque and requires excellent weldability. Consequently, the carbon equivalent must be strictly controlled, and hardness is typically maintained at 43–48 HRC to prevent cold cracking during customer welding operations.

5. Post-Maintenance Recommendations

• Regular Inspection: Check the wear of the bucket teeth and the tightness of the pins every 50 working hours.
• Replace in Sets: When teeth are severely worn and digging efficiency drops, replace both the teeth and the pins simultaneously to prevent loose fittings from damaging the adapter.
• Keep it Clean: Clear mud and rocks trapped between the tooth and adapter after operations to prevent corrosion and jamming.

6. Complementary Product Recommendations

For optimal performance, we highly recommend sourcing these matching components:

• V17 Pin & Retainer: Made of high-strength spring steel to ensure teeth stay locked under severe vibration.
• Excavator Cutting Edges: High-wear-resistant base edges designed for perfect welding with the adapters.
• Bucket Protectors: Heel shrouds and lip protectors to extend the overall lifespan of your bucket.

7. Common Concerns from Buyers, Wholesalers & Customizers (FAQ)

Q1: As a supplier, what is your Minimum Order Quantity (MOQ)?
A: To support B2B clients in testing and market promotion, our MOQ for standard stock items is relatively low. For Custom and OEM orders, the MOQ is evaluated reasonably based on mold development and production runs.

Q2: What is the typical Lead Time?
A: For standard items, we maintain steady inventory and can ship within 10-15 days. For large-scale production or new mold custom orders, the lead time is generally 25-35 days.

Q3: Can you guarantee the quality matches original equipment manufacturer parts?
A: Absolutely. As an expert manufacturer, we rely on high-precision investment casting and CNC machining centers. All products undergo rigorous spectrometer and flaw detection tests before leaving the factory. The lifespan and fitment perfectly rival, and in specific custom materials, even exceed original standards.