JQH Pneumatic Winch Parts Catalog-2

1

Distributing Valve Bush

JQH-5×48-0024

Copper Alloy ZCuSn10Pb1 (Babbitt Lining)

1. Dry friction-induced wear due to insufficient lubrication; 2. Abrasion from contaminated air-borne particles.

1. Ensure continuous lubrication via the winch's oil supply system; 2. Regularly replace air filter elements to prevent particle ingress.

2

Distributing Valve

JQH-5×48-0025

Stainless Steel 304 (Precision Machined)

1. Valve core/seat wear from cyclic pressure fluctuations; 2. Seal degradation due to chemical interaction with low-grade lubricants.

1. Use lubricants compliant with the winch's technical specifications; 2. Monitor air pressure stability to avoid sudden surges.

1

Gear Rack

JQH-5×48-0011

Alloy Steel 40CrNiMoA (Carburized & Quenched)

1. Tooth surface pitting due to fatigue from heavy loads; 2. Abrasive wear from insufficient gear oil or contaminated lubricant.

1. Maintain gear oil at the specified level and replace per maintenance cycle; 2. Avoid overloading the winch beyond its rated capacity.

2

Inner Gear Ring

JQH-5×48-0010

Alloy Steel 20CrMnTi (Gear Hobbing & Heat-Treated)

1. Gear tooth wear from misalignment with mating gears; 2. Corrosion in humid/offshore environments reducing structural integrity.

1. Check gear alignment during maintenance and adjust if needed; 2. Apply anti-corrosion coating to exposed surfaces in harsh environments.

1

Bearing 108

GB276-82

GCr15 Bearing Steel (Sealed Double Row)

1. Lubricant degradation leading to metal-to-metal contact; 2. Bearing race damage from axial overload.

1. Use high-temperature, anti-wear bearing grease; 2. Ensure proper axial clearance during installation to avoid overload.

2

Bearing 203

GB276-82

GCr15 Bearing Steel (Deep Groove Ball Type)

1. Contamination by dust/water causing corrosion and pitting; 2. Fatigue failure from prolonged high-speed operation.

1. Inspect and clean bearing seals regularly; 2. Avoid continuous operation at maximum speed for extended periods.

3

Bearing 209

GB276-82

GCr15 Bearing Steel (C3 Clearance Grade)

1. Thermal expansion-induced seizure in high-temperature environments; 2. Wear from misalignment of rotating shafts.

1. Ensure adequate ventilation around the bearing area; 2. Align rotating shafts precisely during assembly.

4

Elastic Retainer Ring for Shafts 18

GB894.1-86

Spring Steel 60Si2Mn (Heat-Treated)

1. Elastic fatigue from repeated shaft vibration; 2. Wear of the ring edge due to contact with rotating components.

1. Replace retainer rings if they lose rebound elasticity; 2. Ensure the shaft groove is free of burrs to prevent abnormal wear.

5

Elastic Retainer Ring for Shafts 17

GB894.1-86

Spring Steel 65Mn

1. Deformation from improper installation (over-expansion); 2. Corrosion leading to brittleness and breakage.

1. Use specialized retainer ring pliers for installation; 2. Apply anti-rust oil to the ring and groove in humid environments.

6

Elastic Retainer Ring for Shafts 42

GB894.1-86

Spring Steel 60Si2Mn

1. Shear failure due to excessive axial load on the shaft; 2. Wear from continuous contact with heavy components.

1. Verify that axial loads are within the ring's rated capacity; 2. Inspect the ring's fit in the groove regularly for looseness.

1

Oil Drain Screw Plug

JQH-5×48-0036

Carbon Steel Q235 (Zinc-Plated)

1. Thread wear from frequent disassembly for oil changes; 2. Seal damage due to over-tightening.

1. Use a torque wrench to apply specified torque during assembly; 2. Replace the sealing washer each time the plug is removed.

2

Tube Coupling

JQH-5×48-0029

Brass H62 (Precision Machined)

1. Leakage and wear from tube misalignment; 2. Corrosion in saltwater/offshore environments.

1. Ensure tubes are aligned before coupling installation; 2. Use anti-corrosion tape on threads in offshore applications.

3

Union Nut

JQH-5×48-0030

Brass H62

1. Thread stripping from over-tightening; 2. Wear of the sealing surface due to repeated assembly.

1. Tighten only until a secure seal is achieved (avoid over-torque); 2. Inspect the sealing surface for scratches before assembly.

4

Hose Adapter

JQH-5×48-0031

Brass H62 (Barbed Connection)

1. Wear of barbs due to frequent hose removal; 2. Cracking from vibration-induced fatigue.

1. Avoid unnecessary hose removal; 2. Secure hoses with clamps to reduce vibration transfer to the adapter.

5

Sealing Ring 406512

GB9877.1-88

Fluorine Rubber (FKM) (Oil & High-Temp Resistant)

1. Aging and cracking due to high temperature and lubricant exposure; 2. Damage from improper installation (twisting).

1. Replace seals during each major maintenance cycle; 2. Ensure the seal is correctly seated without twists before assembly.

6

Screw Plug M10×1

JB/ZQ4450-86

Carbon Steel 45# (Zinc-Plated)

1. Corrosion of threads leading to seizure; 2. Seal failure from contaminated sealing surfaces.

1. Clean the sealing surface thoroughly before installation; 2. Apply anti-seize compound to threads in corrosive environments.

7

Screw Plug

JQH-5×48-0044

Carbon Steel Q235 (Zinc-Plated)

1. Wear of the hexagonal head due to improper tool use; 2. Leakage from worn thread seals.

1. Use the correct size socket wrench for installation/removal; 2. Replace the integrated seal if leakage is detected.

1

Key 6×32

GB1096-79

Alloy Steel 40Cr

1. Shear failure due to excessive torque transmission; 2. Wear of key and keyway from misalignment.

1. Ensure the key fits snugly in the keyway (no excessive clearance); 2. Avoid sudden torque spikes during winch start-up.

2

Key 12×40

GB1096-79

Alloy Steel 45# (Heat-Treated)

1. Fatigue wear from cyclic torque loading; 2. Corrosion leading to reduced shear strength.

1. Lubricate the key and keyway during assembly; 2. Inspect for corrosion regularly in humid environments.

3

Screw M10×30

GB70-85

Alloy Steel 8.8 Grade (Zinc-Plated)

1. Thread loosening due to continuous vibration; 2. Stress corrosion cracking in corrosive atmospheres.

1. Use thread-locking adhesive or lock washers during assembly; 2. Re-torque screws periodically to maintain tightness.

4

Pin

JQH-5×48-0042

Carbon Steel 45# (Quenched & Tempered)

1. Shear wear from relative movement between connected parts; 2. Bending deformation from impact loads.

1. Ensure the pin is fully seated in the mounting hole; 2. Avoid impact loads on the connected components during operation.

5

Rivet 6×22

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 regularly; 2. Use anti-corrosion coating in offshore applications.

1

Fork

JQH-5×48-0028

Alloy Steel 40Cr (Forged)

1. Bending deformation from excessive force during operation; 2. Wear of the pin hole due to repeated pivoting.

1. Operate the fork within its rated force capacity; 2. Lubricate the pin hole regularly to reduce friction.

2

Cover 2

JQH-5×48-0026

Gray Cast Iron HT250

1. Impact damage from external debris; 2. Corrosion leading to seal groove degradation and leakage.

1. Install a protective shield in debris-prone environments; 2. Inspect the seal groove for corrosion during maintenance.

3

Hand Lever

JQH-5×48-0021

Carbon Steel Q235 (Powder-Coated)

1. Fatigue cracking at the handle base from repeated force application; 2. Coating wear leading to corrosion.

1. Avoid applying excessive force beyond the lever's design limit; 2. Touch up worn powder coating with anti-rust paint.

4

Spring

JQH-5×48-0043

Spring Steel 60Si2Mn (Heat-Treated)

1. Elastic fatigue from repeated compression/extension; 2. Corrosion leading to reduced spring force or breakage.

1. Avoid over-compressing the spring beyond its elastic limit; 2. Keep the spring area clean and dry to prevent corrosion.

5

Hoisting Ring Screw

GB825-88

Alloy Steel 20CrMnTi (Grade 8)

1. Thread wear from repeated installation/removal; 2. Fatigue failure from overloading or side loading.

1. Use only for vertical lifting (avoid side loading); 2. Inspect threads for wear before each use.

6

Lining Plate

JQH-5×48-0103

High-Manganese Steel ZGMn13 (Wear-Resistant)

1. Abrasive wear from contact with lifting cables or debris; 2. Impact damage from heavy load impacts.

1. Inspect plate thickness regularly (replace if below wear limit); 2. Keep the plate surface clean to reduce abrasive wear.

7

Supporting Bracket

JQH-5×48-0102

Alloy Steel 40Cr (Welded & Heat-Treated)

1. Weld joint fatigue from continuous vibration; 2. Corrosion leading to structural weakening.

1. Inspect weld joints for cracks regularly; 2. Apply anti-corrosion paint to the entire bracket surface.