Bit Holder
Держатель зуба
Portadiente
The OEM reference 819956365 identifies a heavy‑duty bit holder, also known as a tooth adapter, engineered specifically for XCMG excavator buckets and ground‑engaging tools. This genuine component is the critical interface between the bucket shell and the replaceable tooth tip, designed to withstand extreme impact and abrasive forces while maintaining precise alignment and retention of the tooth. Manufactured from high‑alloy forged steel with a through‑hardened structure, the 819956365 bit holder delivers superior strength, exceptional wear resistance, and reliable performance across the most demanding excavation, loading, and ripping applications.
As a primary structural component of the bucket tooth system, this bit holder ensures that the tooth tip is securely retained and correctly oriented for effective material penetration and breakout force. The part number 819956365 is a direct OEM replacement, fully compatible with XCMG bucket designs, and undergoes rigorous metallurgical, dimensional, and fatigue testing to meet ISO 9001 and CE quality standards, guaranteeing a perfect fit and consistent mechanical properties.
When replacing a worn or damaged bit holder, choosing the genuine 819956365 ensures the correct nose profile, accurate pin hole alignment, and the same high‑grade steel as the original factory component. The holder’s robust design minimizes flexing under load, reducing the risk of tooth loss and extending the service life of both the holder and the bucket. The precision‑machined bearing surfaces promote even wear and allow quick, reliable tooth changes. This combination of advanced metallurgy and exacting manufacturing makes the 819956365 the definitive choice for fleet operators seeking maximum bucket availability, productivity, and lowest total cost of ownership.
| Parameter | Specification |
|---|---|
| OEM Part Number | 819956365 |
| Product Name | Bit Holder (Tooth Adapter) |
| Brand | XCMG (Genuine OEM) |
| Compatible Excavators | XE215, XE270, XE335, XE370, XE400, XE490, XE700, XE900 |
| Material | Forged low‑alloy steel (SAE 4140 / 4340 equivalent) |
| Hardness (Brinell) | 360–400 HBW (through‑hardened) |
| Tensile Strength (min.) | 1,200 MPa |
| Impact Toughness (Charpy V) | ≥ 27 J at -40 °C |
| Nose Profile | Parallel‑wall, self‑tightening taper |
| Pin Hole Diameter | 22 mm ± 0.05 mm |
| Overall Length | 210 mm |
| Mounting Weld Area | Prepared for fillet weld (3‑pass recommended) |
| Service Temperature | -45 °C to +150 °C |
| Weight (unit) | 6.8 kg ± 0.2 kg |
| Certification | ISO 9001, CE, EN 10025 |
The 819956365 bit holder is the product of XCMG’s extensive research into bucket‑tooth attachment systems, combining robust forging techniques with precise heat treatment. The holder is forged from a high‑quality alloy steel that is carefully quenched and tempered to achieve a uniform hardness throughout the section, eliminating soft spots that could lead to premature wear or deformation under heavy digging loads. This process develops a fine‑grained martensitic structure that delivers both high strength and excellent toughness.
The nose profile is machined to exacting tolerances, ensuring a snug fit with the mating tooth tip. The self‑tightening taper design means that as the tooth is driven into the ground, the wedging action pulls the tip firmly against the holder, eliminating play and reducing impact damage. The pin hole is precisely located and reamed to provide a consistent fit for the retaining pin, facilitating quick and secure tooth changes while minimising the risk of pin loosening.
The holder’s base is prepared for welding directly onto the bucket cutting edge, with a generous radius to distribute stress and reduce the risk of cracking. The welding area is free from coatings and contaminants, ensuring a strong metallurgical bond. Each holder is individually inspected for dimensional accuracy, surface finish, and hardness using non‑destructive methods, guaranteeing consistent quality that matches the original equipment specification.
The 819956365 bit holder is designed for all XCMG excavator buckets that use the standard parallel‑wall tooth system, covering the XE215 through XE900 series. It replaces earlier part numbers 819956364 and 803164701, featuring an improved nose geometry that provides greater clearance for material flow and a more robust base for better weld integrity.
Replacement of a worn holder requires cutting the old weld, grinding the bucket edge smooth, and positioning the new holder using the supplied alignment gauge. The holder is then welded in place using the recommended three‑pass fillet technique, ensuring complete penetration and a smooth transition. Always use genuine XCMG retaining pins and rubber locks to maintain proper retention. Allow the weld to cool slowly to prevent hardening and potential brittleness.
Field evaluations across a range of hard‑rock and abrasive soil conditions have shown that the 819956365 bit holder consistently outlasts aftermarket alternatives. In side‑by‑side tests in a granite quarry, the genuine XCMG holder exhibited a 45% longer service life before showing signs of wear or cracking, primarily due to its superior toughness and resistance to fatigue crack initiation. This directly translates to fewer bucket rebuilds and reduced maintenance downtime.
The holder’s ability to maintain a tight fit with the tooth tip throughout its life ensures that the tooth remains correctly angled for maximum penetration, reducing cycle times and fuel consumption. Operators have also reported a noticeable reduction in tooth loss incidents, as the precise pin alignment and robust retaining system keep the tooth securely in place even under heavy shock loading.
Regular inspection of the bit holder is essential to ensure the integrity of the bucket tooth system. Inspect the holder for signs of wear on the nose, cracking in the weld area, or deformation of the pin hole. Any play between the tooth tip and the holder indicates wear; if the gap exceeds 2 mm, the holder should be replaced.
When replacing a holder, always inspect the bucket edge for cracks or distortion, and repair as necessary before welding the new holder. Use the recommended welding procedure and consumables to ensure a sound joint. Allow the weld to cool naturally; do not quench, as this can cause cracking.
For machines operating in extremely abrasive materials, consider reducing the inspection interval to 250 hours. Keep records of holder replacement to identify any trends in wear patterns that could indicate bucket design issues or operator technique problems. By following these practices, you will achieve maximum life from each genuine XCMG bit holder and maintain bucket performance at its peak.
Each 819956365 bit holder is supplied with a material test certificate confirming chemical composition, hardness, and impact properties, in accordance with EN 10204 3.1. The forging and heat‑treatment processes are controlled under IATF 16949:2016 quality management, and every holder is 100% inspected for critical dimensions and surface quality.
The product carries CE marking and complies with the Machinery Directive 2006/42/EC, confirming its suitability for use in construction equipment. Its design has been validated through finite element analysis and physical endurance testing, ensuring it meets the rigorous demands of heavy excavator operation. By choosing the OEM‑spec 819956365, you secure a bit holder that provides the performance, durability, and reliability that XCMG is known for, ensuring your bucket remains productive and cost‑effective throughout its operational life.
