YOX Series Fluid Coupling Parts

1

YOX400-6

High-carbon alloy steel (42CrMo)

1. Long-term overload beyond torque limit; 2. Impurities in working oil causing abrasive wear.

1. Regularly check oil quality and replace with ISO VG46 hydraulic oil; 2. Install a precision filter in the oil circuit.

2

YOX400-9

High-carbon alloy steel (42CrMo)

1. Improper oil level leading to insufficient lubrication; 2. Frequent start-stop causing thermal fatigue.

1. Maintain oil level at 2/3 of the coupling cavity; 2. Avoid frequent emergency stops in 1 hour.

3

YOX400-11

High-carbon alloy steel (42CrMo)

1. Misalignment between input and output shafts; 2. Corrosion from humid working environments.

1. Align shafts with a dial indicator (error ≤0.2mm); 2. Apply anti-rust coating to external surfaces in humid workshops.

4

YOX420-2

Alloy cast iron (QT500-7)

1. Impact load from sudden material blocking; 2. Thermal deformation due to poor heat dissipation.

1. Install a torque limiter to avoid impact load; 2. Clean the cooling fins weekly to ensure heat dissipation.

5

YOX450-7

High-carbon alloy steel (42CrMo)

1. Wear of sealing rings leading to oil leakage and dry friction; 2. Long-term operation at high temperature.

1. Replace nitrile rubber seals every 6 months; 2. Control working temperature below 110℃.

6

YOX450-11

High-carbon alloy steel (42CrMo)

1. Screw loosening caused by vibration leading to partial wear; 2. Oil oxidation resulting in abrasive particles.

1. Retighten connecting screws monthly with a torque wrench; 2. Replace oil every 2000 operating hours.

7

YOX450-13

High-carbon alloy steel (42CrMo)

1. Improper installation causing uneven stress distribution; 2. Foreign objects entering the coupling cavity.

1. Follow HG4-692-67 installation specifications; 2. Install a protective cover to prevent foreign objects from entering.

8

YOX560-3

Alloy cast iron (QT600-3)

1. Overheating due to insufficient oil circulation; 2. Fatigue crack caused by long-term heavy load.

1. Check oil circulation pipeline for blockage monthly; 2. Avoid continuous operation at over 90% of rated torque.

1

HG4-692-67

Fluid coupling sealing and connecting parts

Nitrile rubber + carbon steel

1. Aging due to long-term contact with high-temperature oil; 2. Mechanical extrusion during disassembly.

1. Store in a cool, dry environment (temperature 5-25℃); 2. Use special tools for disassembly to avoid extrusion.

2

GB/T276-94

Deep groove ball bearings for fluid couplings

GCr15 bearing steel

1. Contamination of lubricating grease with impurities; 2. Excessive axial load causing raceway wear.

1. Use lithium-based grease (NLGI 2) and replace every 1500 hours; 2. Control axial displacement within 0.1mm.

1

How to confirm if HG4-692-67 parts are compatible with YOX series couplings?

HG4-692-67 specifies sealing and connecting parts for YOX400-YOX560 series. Check the coupling’s nameplate for standard compliance; our parts fully meet this standard for direct replacement.

2

What is the service life of YOX560-3 parts under heavy load conditions?

Under normal maintenance (oil change every 2000 hours, alignment check monthly), the service life is 8000-10000 operating hours. Avoid continuous overload to extend service life.

3

Why do GB/T276-94 bearings need regular grease replacement?

GCr15 bearings rely on grease for lubrication and heat dissipation. Long-term operation causes grease oxidation and impurity mixing, leading to raceway wear. Regular replacement (every 1500 hours) ensures bearing performance.