Tungsten Carbide axle sleeves&bushings

Crafted from tungsten carbide alloy, they boast hardness surpassing ordinary materials. Significantly enhancing stability and reliability, our sleeves & bushings deliver superior performance in extreme operating conditions.

Axle Sleeves & Bushings Kedel Provides for You

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What Are Tungsten Carbide Axle Sleeves & Bushings?

Tungsten carbide axle sleeves and bushings are tungsten carbide – based, wear – resistant sleeve – type transmission components that fit the shaft systems of various equipment. They feature extremely high hardness (Vickers hardness ≥ 1800Hv), excellent wear resistance and corrosion resistance, and can operate stably under high – load, severe abrasive, or corrosive conditions. Their main function is to isolate the direct contact between the shaft and the housing, reduce friction loss, protect transmission components, and maintain motion precision. They are key wear – resistant components in the transmission systems of equipment in industries such as mining, petrochemicals, and construction machinery, and are widely used in core positions like the main shafts of crushers, hydraulic cylinders, and mud pumps.

Structure and types of tungsten carbide axle sleeves & bushings

There are many types of tungsten carbide axle sleeves & bushings, and the following types are more suitable for the oil and gas industry

Sleeve Bearings

Structure: Precisely machined tungsten carbide – cobalt alloy sleeves with smooth inner and outer surfaces.
Key Advantages: Wear – resistant to reduce friction (30% less friction in oilfield pumps), high load – bearing capacity, and resistant to downhole fluid corrosion (service life 4 – 6 times that of steel bearings).
Typical Applications: Main bearings of downhole drilling motors, rotating shafts of oilfield centrifugal pumps, and gearboxes of drilling rigs.

Flanged Sleeve Bearings

Structure: Tungsten carbide sleeves with integral flanges, precision – ground surfaces, and tantalum carbide for enhanced performance.
Key Advantages: Easy installation with flanges, precise alignment (reducing failure risk by 40%), excellent wear and corrosion resistance (1/5 wear rate of bronze bearings), and high – temperature resistance (up to 250°C).
Typical Applications: Inlet/outlet sections of oilfield pipeline pumps, rotating components of oilfield heat exchangers, and valve actuators of oil and gas pipelines.

Drill Bushings

Structure: Tungsten carbide bushings with precisely sized inner holes for drill guidance, optional ceramic coating on the outer surface, high hardness (HRA 90 – 92), and impact resistance.
Key Advantages: Precise drill guidance (reducing bit deviation by over 50%), high wear resistance (3 – 5 times the service life of traditional bushings in hard – rock drilling), and impact resistance for continuous operation.
Typical Applications: Drill strings of drilling rigs, well completion reaming operations, and horizontal well drilling.

What Products Are Commonly Used For?

小标题

Petroleum Drilling Bit - Main Shaft Bearing

Withstands high temperatures (150℃+)，high pressures (30MPa+)，and rock cuttings abrasion，used in PDC bits and roller cone bits.

Screw Drilling Tool - Drive Shaft Protection Sleeve

Prevents mud corrosion and solid particle impact，extends the service life of downhole tools，suitable for directional and horizontal well drilling.

Oil Submersible Pump - Contact Surface of Plunger and Barrel

Resists corrosion from sulfides in crude oil and abrasion from sand particles，improves pump efficiency，common in rod and rodless pump systems.

Refinery Vacuum Tower - Oil and Gas Pipeline Interface at Tower Top

Withstands high-temperature (400℃+) oil and gas erosion，prevents pipeline corrosion and leakage，used in key parts of distillation units.

Tungsten carbide bushings and casings are not only used in the petroleum and natural gas industry but also widely applied in other above-mentioned fields, including mechanical engineering, mining and metallurgy, aerospace and military, chemical engineering and medical devices, as well as other specialized sectors.

Application Scenarios of Axle Sleeves & Bushings

碳化钨轴套与衬套凭借超高耐磨性、耐腐蚀性和尺寸稳定性，成为高负载、强磨损、恶劣环境中保护机械传动部件的核心选择

油气 / 采矿泥浆泵轴套

采矿破碎机主轴衬套

钻头喷嘴轴套

What You Need to Know About Tungsten Carbide Axle Sleeves & Bushings Parameters

tungsten carbide axle sleeves and bushings directly impacts equipment operation stability, service life, and production efficiency.

I. Basic Physical Parameters

1. Material Composition

Primarily based on a tungsten carbide (WC) matrix, combined with binders like cobalt (Co). Common grades include YG8 (with approximately 8% Co) and YG15 (with around 15% Co). Grades with higher cobalt content offer better toughness for impact – prone conditions, while those with lower cobalt content prioritize hardness for wear – intensive scenarios.
Special alloys with added elements like titanium (Ti) or tantalum (Ta) can be customized to enhance high – temperature resistance and corrosion resistance (e.g., for axle sleeves in high – temperature pumps in the petrochemical industry).

2. Hardness

Typically ranges from HRA85 to 92 (Rockwell hardness A scale), far higher than ordinary steel sleeves (a significant difference when converted from HRC50 – 60). This ensures wear resistance in extreme conditions; for example, axle sleeves in mine crushers require HRA≥90 to withstand sand and rock impacts.

3. Density

Approximately 13.5 – 14.5g/cm³ , varying with cobalt content and alloy composition. The high – density characteristic helps maintain structural stability during high – speed rotation and under high pressure, reducing the risk of centrifugal deformation.

II. Dimensional and Installation Parameters

1. Nominal Dimensions

Inner Diameter (ID): Ranges from φ5mm to φ500mm , suitable for shaft diameters in applications from precision machine tool spindles (small inner diameters) to large mining equipment (large inner diameters). For instance, the inner diameter precision of axle sleeves in aero – engines can reach within ±0.005mm.
Outer Diameter (OD) and Length (L): Customizable as needed. Common axle sleeve lengths range from 10mm to 500mm; due to the need to support long shafts, axle sleeves in oil mud pumps are often over 200mm in length.

2. Tolerance and Fit

Inner Diameter Tolerance: For precision scenarios (e.g., aerospace, high – end machine tools), it can reach H7 grade (within ±0.015mm) to ensure accurate fit with shafts. For heavy – duty industrial scenarios (e.g., mining), H8 grade is commonly used, allowing a larger gap to compensate for installation errors.
Interference Fit: When fitting with mounting seats, the interference ranges from 0.02mm to 0.1mm . Too little interference may cause loosening, while too much may crush the axle sleeve. It needs to be designed according to equipment conditions (e.g., vibration intensity, load direction).

III. Performance – Related Parameters

1. Wear Resistance

Measured by “wear amount”. In laboratory simulations of mine conditions (sand scouring, heavy – load friction), high – quality tungsten carbide axle sleeves have a wear amount < 0.1mm over 1000 hours , far better than steel sleeves (which have a wear amount exceeding 1mm under the same conditions).
Related Parameter: Surface roughness Ra, which can reach Ra≤0.8μm after precision grinding. Low roughness reduces the friction coefficient, lowers the risk of abrasive particle embedment, and extends wear – resistant service life.

2. Compressive Strength

Under normal conditions, it ranges from 3000 – 5000MPa . It needs to withstand extreme pressures in equipment like mine crushers and high – pressure oil pumps (e.g., axle sleeves in mud pumps need to have a compressive strength ≥4000MPa to handle 2000bar pump pressure), preventing cracking and deformation under high pressure.

3. Temperature Resistance

Short – term heat resistance can reach 800℃ – 1000℃ , with a continuous operating temperature of ≤600℃ . In high – temperature equipment such as metallurgical continuous casting machines and aero – engines, it ensures the stable operation of shaft components and prevents softening – induced failure due to high temperatures.

IV. Application – Adapted Parameters

1. Operating Condition – Adapted Parameters

Applicable Pressure: Ranges from atmospheric pressure to 3000bar (e.g., axle sleeves in high – pressure valves in the petrochemical industry need to adapt to 3000bar pressure). It must match the pressure of the equipment’s hydraulic and fluid systems to prevent high – pressure leakage and component damage.
Applicable Rotational Speed: Ranges from ≤10000r/min (for precision machine tool spindles) to ≤1000r/min (for heavy – duty mining equipment). For high rotational speeds, strict control of dynamic balance and centrifugal force is required to ensure shaft system stability.

2. Special Environment – Adapted Parameters

Corrosion Resistance Grade: In chemical acid – base environments, it needs to be verified by “salt spray test duration”. For example, axle sleeves in petrochemical pumps require a 500 – hour salt spray test with no significant corrosion to ensure service life in harsh media.
Impact Toughness: Measured by “impact energy”. Axle sleeves in mine crushers need to have impact energy ≥5J/cm² to withstand high – frequency impacts during ore crushing and prevent brittle fracture.