JQH Pneumatic Winch Spare Parts Catalog (JQH-5×48 Series)

1

JQH-5×48-0003

Reel

Alloy steel 42CrMo + anti-rust coating

1. Abrasive wear from cable friction; 2. Fatigue cracking from repeated load

1. Inspect cable alignment monthly to avoid uneven wear; 2. Test tensile strength per GB/T 13239 quarterly

2

JQH-5×48-0004

Screw

Stainless steel 304

1. Thread galling from insufficient lubrication; 2. Corrosion from moisture

1. Apply anti-galling paste before assembly; 2. Clean and re-grease every 3 months

3

JQH-5×48-0005

Clutch

Alloy steel 35CrMo + friction lining

1. Friction lining wear from frequent engagement; 2. Misalignment-induced jamming

1. Adjust engagement clearance to 0.1-0.2mm; 2. Replace lining when wear exceeds 2mm

4

JQH-5×48-0006

Sleeve

Carbon steel Q355B + quenching treatment

1. Wear at rotational contact; 2. Deformation from impact load

1. Lubricate with lithium-based grease monthly; 2. Avoid sudden load changes

5

JQH-5×48-0007

Main axle

Alloy steel 42CrMo + carburizing

1. Bending deformation from overload; 2. Fatigue cracking at stress points

1. Do not exceed rated load (5t); 2. Inspect for cracks via ultrasonic testing every 6 months

6

JQH-5×48-0008

Base

Carbon steel Q235B + epoxy coating

1. Corrosion from ground moisture; 2. Bolt loosening from vibration

1. Install on dry, level surface; 2. Retorque fixing bolts monthly

7

JQH-5×48-0010

Inner gear ring

Alloy steel 20CrMnTi (gear steel)

1. Tooth wear from insufficient lubrication; 2. Pitting corrosion from contaminated oil

1. Use industrial gear oil (ISO VG 46); 2. Replace oil every 12 months or 500 operating hours

8

JQH-5×48-0011

Gear rack

Alloy steel 20CrMnTi

1. Tooth surface abrasion; 2. Misalignment-induced edge wear

1. Align with gear ring per GB/T 10095.1; 2. Apply anti-wear additive to gear oil

9

JQH-5×48-0013

Crankshaft

Alloy steel 42CrMo

1. Thermal fatigue from high-speed operation; 2. Bearing seat wear

1. Control operating speed within 1500rpm; 2. Inspect bearing fit every 3 months

10

JQH-5×48-0017

Body

Carbon steel Q355B + shot blasting

1. Corrosion from harsh environments; 2. Crack at mounting points

1. Touch up paint on scratches within 24 hours; 2. Ensure uniform load distribution at mountings

1

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Bearing

GB/T276-2000

GCr15 bearing steel + sealed cage

1. Lubricant degradation; 2. Contamination from dust/foreign particles

1. Use bearing grease (NLGI 2); 2. Install dust covers to prevent contamination

2

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Bearing

GB/T276-2000

GCr15 bearing steel

1. Overload-induced fatigue; 2. Misalignment-induced stress

1. Ensure radial clearance meets GB/T 4604; 2. Avoid eccentric load

3

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Bearing

GB/T276-2000

GCr15 bearing steel

1. High-temperature oxidation; 2. Lubricant starvation

1. Operate within -20℃ to 120℃; 2. Refill grease every 200 operating hours

4

-

Elastic retainer ring for shafts

GB/T894.1-2000

65Mn spring steel

1. Deformation from improper installation; 2. Fatigue from vibration

1. Use specialized pliers for installation; 2. Replace if deformation exceeds 1mm

5

-

Elastic retainer ring for shafts

GB/T894.1-2000

65Mn spring steel

1. Corrosion from moisture; 2. Wear at groove contact

1. Apply anti-rust oil after installation; 2. Inspect groove for wear monthly

6

-

Elastic retainer ring for shafts

GB/T894.1-2000

65Mn spring steel

1. Tensile fatigue; 2. Damage from disassembly

1. Do not reuse after disassembly; 2. Ensure proper fit in shaft groove

7

JQH-5×48-0051

Retainer ring 3

-

Stainless steel 304

1. Corrosion from chemical exposure; 2. Deformation from overload

1. Avoid contact with corrosive media; 2. Test load capacity annually

1

-

Seal ring

B95×120×12

GB/T13871-2000

Nitrile rubber (NBR 70)

1. Thermal aging; 2. Swelling from incompatible oil

1. Replace every 6 months; 2. Use NBR-compatible hydraulic oil

2

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Seal ring

B40×65×12

GB/T13871-2000

Nitrile rubber (NBR 70)

1. Abrasion from piston movement; 2. Damage from sharp edges

1. Deburr piston edges before assembly; 2. Inspect seal surface monthly

3

JQH-5×48-0012

Pad 2

-

-

Rubber + steel core

1. Compression set from long-term load; 2. Tear from vibration

1. Control compression ratio at 15-20%; 2. Replace if compression set exceeds 3mm

4

JQH-5×48-0018

Pad 3

-

-

Rubber + steel core

1. Corrosion of steel core; 2. Rubber aging from UV exposure

1. Shield from direct sunlight; 2. Inspect for rust on core quarterly

5

JQH-5×48-0022

Gasket 1

-

-

Asbestos-free fiber + rubber coating

1. Damage from over-torque; 2. Leakage from uneven surface

1. Torque fasteners uniformly (30±3 N·m); 2. Replace after each disassembly

6

JQH-5×48-0023

Pad 4

-

-

Rubber + steel core

1. Wear from mechanical friction; 2. Deformation from impact

1. Apply lubricant to contact surface; 2. Avoid direct impact

7

JQH-5×48-0026

Gasket 2

-

-

Asbestos-free fiber + rubber coating

1. Chemical degradation from pneumatic oil; 2. Deterioration from moisture

1. Use compatible pneumatic oil; 2. Keep gasket dry during storage

8

JQH-5×48-0027

Pad 5

-

-

Rubber + steel core

1. Thermal expansion damage; 2. Rubber hardening

1. Operate within -10℃ to 80℃; 2. Replace if rubber hardness exceeds 85 Shore A

9

-

Oil cup

M10

GB/T1152-2000

Brass + zinc plating

1. Clogging from oil impurities; 2. Corrosion of thread

1. Clean oil cup monthly; 2. Apply thread sealant to prevent leakage

1

JQH-5×48-0019

Main valve

Stainless steel 304 + rubber seal

1. Seal wear from frequent operation; 2. Clogging from air impurities

1. Install air filter regulator; 2. Clean valve core every 3 months

2

JQH-5×48-0020

Main valve bush

Copper alloy

1. Wear from valve core movement; 2. Corrosion from moisture in air

1. Lubricate with pneumatic oil monthly; 2. Install dryer in air line

3

JQH-5×48-0021

Piston (For manual)

Aluminum alloy + rubber seal

1. Seal damage from lateral pressure; 2. Wear at cylinder contact

1. Ensure piston concentricity; 2. Replace seal every 4 months

4

JQH-5×48-0024

Distributing valve bush (For manual)

Copper alloy

1. Galling from insufficient lubrication; 2. Wear from valve rotation

1. Apply anti-seize paste; 2. Limit valve rotation angle to 90°

5

JQH-5×48-0025

Distributing valve (For manual)

Stainless steel 304

1. Tooth wear from manual operation; 2. Corrosion from humid air

1. Operate smoothly to avoid tooth impact; 2. Apply anti-rust oil monthly

6

JQH-5×48-0028

Fork (For manual)

Alloy steel 35CrMo

1. Bending deformation from excessive force; 2. Wear at connection points

1. Avoid overexertion during manual operation; 2. Lubricate connection points monthly

7

JQH-5×48-0029

Tube coupling (For manual)

Brass + zinc plating

1. Thread wear from repeated connection; 2. Leakage from seal damage

1. Use thread protectors when disconnected; 2. Replace seal after 5 connections

8

JQH-5×48-0030

Union nut (For manual)

Brass + zinc plating

1. Over-torque damage; 2. Corrosion of thread

1. Torque to 25±2 N·m; 2. Apply thread sealant for airtightness

9

JQH-5×48-0031

Hose adapter (For manual)

Stainless steel 304

1. Leakage from improper fit; 2. Wear from hose vibration

1. Ensure tight fit with hose; 2. Secure hose to reduce vibration

10

JQH-5×48-0032

Connector

Stainless steel 304

1. Corrosion from harsh environments; 2. Damage from impact

1. Inspect for corrosion monthly; 2. Install protective cover

11

APH8-03

Hose coupler

Brass + rubber seal

1. Seal wear from frequent coupling; 2. Pressure loss from loose fit

1. Replace seal every 6 months; 2. Ensure full engagement when coupling

1

-

Hoisting ring screw

M12

GB/T825-2000

Alloy steel 40Cr

1. Fatigue from repeated hoisting; 2. Thread damage from over-torque

1. Torque to 40±3 N·m; 2. Inspect for cracks before each hoisting

2

-

Key

12×40

GB/T1096-2000

45# carbon steel

1. Shear failure from overload; 2. Wear at keyway contact

1. Ensure tight fit in keyway; 2. Do not exceed rated torque

3

-

Key

6×32 (For manual)

GB/T1096-2000

45# carbon steel

1. Wear from manual operation; 2. Corrosion in keyway

1. Apply anti-rust oil in keyway; 2. Inspect fit every 3 months

4

-

Cotter pin

2.5×36

GB/T91-2000

Stainless steel 304

1. Bending fatigue from vibration; 2. Corrosion from moisture

1. Bend ends to 90° after installation; 2. Replace if bent or corroded

5

JQH-5×48-0033

Capstan nut

-

-

Stainless steel 304

1. Thread wear from frequent adjustment; 2. Damage from impact

1. Adjust smoothly to avoid thread damage; 2. Use wrench instead of hammer

How often should gear oil be replaced in the inner gear ring?

Replace industrial gear oil (ISO VG 46) every 12 months or 500 operating hours, whichever comes first. For dusty environments, shorten the interval to 8 months to prevent contamination.

What type of lubricant is suitable for bearings and rotating parts?

Use lithium-based grease (NLGI 2) for general bearings and rotating parts. For high-temperature environments (>100℃), switch to high-temperature synthetic grease to avoid degradation.

How to prevent seal ring swelling and failure?

Use NBR-compatible pneumatic/hydraulic oil, avoid mixing oil types, and replace seal rings every 6 months. Store spare seals in a cool, dry place to prevent premature aging.