JQH Pneumatic Winch Parts Catalog-3

1

Double-gear

JQH-5×48-0038

Alloy Steel 20CrMnTi (Carburized & Quenched, Hardness ≥ HRC58)

1. Tooth surface pitting and spalling due to fatigue from continuous heavy-load transmission; 2. Abrasive wear caused by contaminated gear oil containing metal particles.

1. Maintain gear oil at the specified level and replace it per the manufacturer’s maintenance cycle; 2. Install a magnetic oil filter to capture metal debris and prevent gear contamination.

2

Main Axle

JQH-5×48-0007

Alloy Steel 42CrMo (Quenched & Tempered, Tensile Strength ≥ 1080MPa)

1. Journal wear due to insufficient lubrication or bearing failure; 2. Bending deformation caused by axial overload or misalignment of connected components.

1. Regularly inspect bearing condition and lubricant quality; 2. Ensure precise alignment of the main axle with mating components during assembly to avoid eccentric loads.

3

Small Shaft

JQH-5×48-0039

Alloy Steel 40Cr (Heat-Treated)

1. Shear wear at the keyway due to cyclic torque fluctuations; 2. Corrosion in humid environments leading to reduced structural integrity.

1. Lubricate the keyway and shaft surface regularly; 2. Apply anti-corrosion coating to exposed shaft sections in offshore or high-humidity environments.

4

Reel

JQH-5×48-0003

Carbon Steel Q355B (Welded & Stress-Relieved)

1. Abrasive wear on the drum surface from repeated cable friction; 2. Weld joint fatigue due to cyclic loading during lifting operations.

1. Inspect the drum surface for wear grooves regularly; resurface or replace if wear exceeds 10% of the cable diameter; 2. Avoid sudden load impacts that stress weld joints.

1

Brake Steel Band

JQH-5×48-0106

Spring Steel 65Mn (Heat-Treated, Surface Shot Peened)

1. Fatigue cracking due to repeated tension and release during braking cycles; 2. Corrosion-induced weakening in humid or corrosive environments.

1. Inspect for cracks or deformation after every 500 braking cycles; 2. Apply anti-rust lubricant to the steel band surface, avoiding contact with the friction lining.

2

Brake Band

JQH-5×48-0107

Asbestos-Free Friction Material (Reinforced with Aramid Fibers)

1. Abrasive wear from continuous contact with the reel during braking; 2. Glazing of the friction surface due to overheating from frequent heavy-load braking.

1. Monitor friction material thickness; replace if below 3mm; 2. Avoid prolonged continuous braking to prevent overheating; allow cool-down periods between heavy-load stops.

3

Clutch

JQH-5×48-0005

Alloy Steel 40CrNiMoA (Precision Machined)

1. Wear of the clutch engagement teeth due to misalignment during shifting; 2. Seizure caused by insufficient lubrication or contaminated lubricant.

1. Ensure smooth, aligned shifting to avoid tooth impact; 2. Use high-pressure, anti-wear lubricant specifically formulated for clutch systems.

4

Clutch Spring

JQH-5×48-0045

Spring Steel 60Si2Mn (Heat-Treated, Shot Peened)

1. Elastic fatigue from repeated compression and extension during clutch engagement/disengagement; 2. Corrosion leading to reduced spring force or sudden breakage.

1. Inspect spring free length regularly; replace if it deviates by more than 5% from the nominal value; 2. Keep the clutch housing clean and dry to prevent corrosion.

1

Nut M12

GB41-86

Alloy Steel 8.8 Grade (Zinc-Plated, Passivated)

1. Thread loosening due to continuous vibration; 2. Stress corrosion cracking in saltwater or high-humidity environments.

1. Use lock washers or thread-locking adhesive during assembly; 2. Re-torque nuts periodically and replace if threads are damaged or corroded.

2

Screw M12×45

GB70-85

Alloy Steel 8.8 Grade (Zinc-Plated)

1. Thread wear from repeated assembly/disassembly; 2. Shear failure due to over-tightening or eccentric loading.

1. Use a torque wrench to apply the specified torque during installation; 2. Avoid reusing screws that have been tightened beyond their yield strength.

3

Bolt M6×25

GB5781-86

Carbon Steel 4.8 Grade (Zinc-Plated)

1. Corrosion of the bolt shank leading to reduced tensile strength; 2. Head failure due to improper tool use during installation.

1. Use the correct size socket wrench to avoid stripping the bolt head; 2. Apply anti-corrosion coating to bolts used in offshore or corrosive environments.

4

Gasket 12

GB97.1-85

Steel Sheet with Zinc Plating

1. Deformation and fatigue due to repeated thermal cycling; 2. Corrosion leading to seal failure and leakage.

1. Replace gaskets during each disassembly of the connected components; 2. Ensure the mating surfaces are clean and flat before installation.

5

Gasket 8

GB96-85

Copper Sheet (Soft Annealed)

1. Crushing due to over-tightening of fasteners; 2. Oxidation of the copper surface leading to poor sealing.

1. Torque fasteners to the recommended value to avoid over-compression; 2. Store gaskets in a dry environment to prevent oxidation.

6

Rivet 3×13

GB867-86

Aluminum Alloy 5056

1. Fatigue failure due to cyclic vibration; 2. Corrosion in saltwater environments leading to material weakening.

1. Inspect rivets for looseness or deformation during regular maintenance; 2. Use anti-corrosion sealant around rivet heads in offshore applications.

7

Rivet 2×4

GB827-86

Aluminum Alloy 1050

1. Shear damage from improper installation (over-setting); 2. Wear due to contact with moving components.

1. Use a rivet gun with the correct die size for installation; 2. Ensure rivets are not in contact with rotating or sliding parts.

8

Seal Ring B9512012

GB9877.1-88

Fluorine Rubber (FKM) (Temperature Range: -20℃ to 200℃)

1. Aging and cracking due to prolonged exposure to high temperature and lubricating oil; 2. Damage from improper installation (twisting or stretching).

1. Replace seals during each major maintenance cycle; 2. Use a seal installation tool to avoid twisting; ensure the seal groove is clean and free of burrs.

9

Screw

JQH-5×48-0004

Carbon Steel 45# (Quenched & Tempered)

1. Thread wear from frequent adjustment; 2. Corrosion leading to thread seizure.

1. Lubricate threads with anti-seize compound before installation; 2. Avoid over-tightening when making adjustments.

1

Base

JQH-5×48-0008

Gray Cast Iron HT300 (Resin Sand Casting, Stress-Relieved)

1. Crack formation due to uneven foundation or overloading; 2. Corrosion in humid environments leading to reduced load-bearing capacity.

1. Ensure the winch is mounted on a level, rigid foundation; 2. Apply anti-corrosion paint to the base surface, touching up scratches promptly.

2

Hand Lever

JQH-5×48-0101

Carbon Steel Q235 (Powder-Coated, Ergonomic Design)

1. Fatigue cracking at the handle-base junction due to excessive force application; 2. Powder coating wear leading to corrosion and reduced grip.

1. Avoid applying force beyond the lever’s rated capacity; 2. Touch up worn powder coating with anti-rust paint and ensure the grip surface is clean.

3

Adjusting Screw

JQH-5×48-0104

Alloy Steel 40Cr (Precision Ground Threads)

1. Thread wear from frequent adjustment; 2. Seizure due to contamination with dust or debris.

1. Lubricate threads with high-temperature grease regularly; 2. Install a protective cap to prevent debris ingress into the thread area.

4

Coupling

JQH-5×48-0105

Ductile Iron QT450-10 (Rubber Insert)

1. Wear of the rubber insert due to misalignment and vibration; 2. Damage to the coupling hubs from excessive torque.

1. Ensure precise alignment of connected shafts to minimize vibration; 2. Inspect the rubber insert for cracks or hardness degradation regularly.

5

Pad 2

JQH-5×48-0012

Rubber EPDM (Heat & Oil Resistant)

1. Compression set due to continuous load; 2. Aging and hardening from exposure to high temperature and lubricants.

1. Replace pads if they lose more than 30% of their original thickness; 2. Avoid direct contact with incompatible chemicals or excessive heat sources.

6

Sleeve

JQH-5×48-0006

Copper Alloy ZCuSn5Pb5Zn5

1. Abrasive wear due to relative movement with mating shafts; 2. Corrosion leading to increased clearance and vibration.

1. Lubricate the sleeve inner diameter regularly; 2. Inspect clearance with the shaft periodically; replace if excessive.

7

Split Cap

JQH-5×48-0046

Carbon Steel Q235 (Zinc-Plated)

1. Wear of the split interface due to repeated assembly/disassembly; 2. Corrosion leading to reduced clamping force.

1. Use a torque wrench to ensure uniform clamping force during assembly; 2. Replace if the split interface is worn or corroded.

8

Nameplate

JQH-5×48-0041

Stainless Steel 304 (Etched, UV-Resistant Coating)

1. Fading of printed information due to prolonged UV exposure; 2. Scratching and corrosion in harsh industrial environments.

1. Avoid using abrasive cleaners on the nameplate; 2. Apply a clear protective film if the winch is installed outdoors or in corrosive areas.

9

Elastic Retainer Ring for Holes 40

GB893.1-86

Spring Steel 60Si2Mn (Heat-Treated)

1. Elastic fatigue from repeated expansion during assembly/disassembly; 2. Wear of the ring edge due to contact with moving components.

1. Use specialized retainer ring pliers for installation/removal to avoid over-expansion; 2. Ensure the hole groove is free of burrs to prevent abnormal wear.