Lanzhou LS Cantilever Sheave Set Parts

1

Cantilever Sheave Set - Sheave φ720/56 (111.53.16.01)

Sheave Body: 42CrMo Alloy Steel (Quenched & Tempered, Hardness HRC 30-35); Sheave Groove: Hard Chrome Plated (Coating Thickness ≥0.1mm, Hardness HRC ≥60); Hub: Forged Integral Structure; Surface Treatment: Shot Blasting + Epoxy Primer

1. Uneven groove wear due to misalignment between sheave and wire rope; 2. Groove surface peeling from high-pressure friction with wire rope; 3. Corrosion of sheave body in high-humidity offshore drilling environments; 4. Fatigue cracks in the sheave web due to cyclic load stress

1. Align the sheave with the wire rope centerline (deviation ≤0.5mm) during installation; inspect alignment weekly using a laser alignment tool; rework or replace the sheave if groove wear depth exceeds 2mm or uneven wear is ≥1mm; 2. Ensure the wire rope diameter matches the groove size (φ56); replace wire rope if it shows signs of uneven wear that may abrade the groove; 3. For offshore applications, apply marine-grade polyurethane topcoat annually; clean the sheave surface with fresh water after exposure to salt spray; 4. Conduct non-destructive testing (magnetic particle testing) on the sheave web every 6 months to detect fatigue cracks; replace the sheave immediately if cracks are found

2

Cantilever Sheave Shaft (111.53.16.03)

Shaft Body: 40CrNiMoA Alloy Steel (Quenched & Tempered, Hardness HRC 28-32); Journal Surface: Nitrided (Nitride Layer Thickness ≥0.3mm, Hardness HV ≥850); Keyway: Precision Milled; Surface Treatment: Black Oxide Coating + Anti-Rust Oil

1. Journal wear due to inadequate lubrication between shaft and bearing; 2. Shaft bending deformation under overload during lifting operations; 3. Keyway damage from torque transmission fluctuations; 4. Corrosion of non-nitrided surfaces in humid environments

1. Lubricate the journal with high-temperature lithium-based grease (NLGI Grade 2) before installing the bearing; replenish lubricant every 500 operating hours; inspect journal wear with a micrometer (replace shaft if wear exceeds 0.05mm); 2. Calculate the lifting load before operation; ensure it does not exceed the shaft’s rated load (refer to Lanzhou LS mast technical manual); avoid sudden load impacts; 3. Inspect the key and keyway for wear monthly; replace the key if fit clearance exceeds 0.1mm; rework the keyway if it shows signs of galling; 4. Apply anti-rust oil to non-nitrided surfaces monthly; store spare shafts in a dry, dehumidified warehouse (RH ≤60%)

3

Bearing 170×280×150 GB299-86 (2097734K)

Bearing Type: Spherical Roller Bearing (GB/T 299); Inner Ring/Outer Ring/Rollers: GCr15 Chrome Bearing Steel (Quenched & Tempered); Cage: Brass; Sealing Ring: Nitrile Butadiene Rubber (NBR); Lubrication: Factory-Filled Lithium-Based Grease

1. Bearing seizure due to sand dust intrusion through damaged seals; 2. Fatigue failure of rollers from inadequate lubrication or contaminated grease; 3. Corrosion of bearing rings in high-humidity environments; 4. Overheating damage from misalignment between shaft and bearing

1. Inspect the sealing ring for damage before installation; replace if cracks or hardening are found; install a dust cover on the bearing outer end to prevent sand dust intrusion; 2. Replace the lubricant every 6 months or if it becomes contaminated (dark color, presence of particles); use only clean, compatible grease (avoid mixing different grease types); 3. For humid drilling sites, apply anti-corrosion grease to the bearing outer surface monthly; store spare bearings in a sealed container with desiccant; 4. Ensure the shaft journal runout is ≤0.02mm during installation; align the bearing housing with the shaft centerline (deviation ≤0.1mm) to prevent overheating; monitor bearing temperature during operation (normal temperature ≤70℃; shut down if temperature exceeds 80℃)

1

Bolt M20×55 GB32.1-88 (M20×55-8.8)

Bolt Body: 45# Steel (Quenched & Tempered, Strength Grade 8.8); Thread: Precision Rolled (Grade 6g); Head: Countersunk Hexagon Socket (GB/T 32.1); Surface Treatment: Zinc Plating + Passivation; Shank: Smooth Precision Ground

1. Thread seizure due to sand dust contamination during installation; 2. Bolt loosening from continuous drilling vibration; 3. Corrosion of zinc coating in salt-spray environments; 4. Hexagon socket damage from improper tool use

1. Clean threads with a wire brush before installation; apply anti-seize lubricant (copper-based) to threads to prevent seizure; use a torque wrench to apply the recommended torque (180-200 N·m for M20-8.8 bolts, per GB/T 16823.1); 2. Install spring washers (GB/T 93) or use thread-locking adhesive (Loctite 243) to prevent loosening; recheck torque every 2 weeks; 3. For offshore applications, replace with 316L stainless steel bolts; rinse with fresh water daily and apply anti-corrosion spray weekly; 4. Use a hexagon socket wrench of the correct size (avoid worn or mismatched tools) to prevent socket damage

2

Washer 20 GB93-87 (20)

Washer Body: 65Mn Spring Steel (Heat-Treated); Surface Treatment: Zinc Plating; Type: Single-Coiled Spring Washer (GB/T 93); Inner Diameter: φ20; Outer Diameter: φ32; Thickness: 3mm

1. Loss of elasticity due to over-compression during installation; 2. Corrosion of surface coating in humid environments; 3. Deformation due to uneven load distribution

1. Ensure the washer is properly matched to the bolt diameter (M20); do not use oversized washers; avoid over-tightening the bolt (follow torque guidelines) to prevent excessive compression; 2. Inspect washers for corrosion monthly; replace if rust or coating peeling is found; 3. Install the washer with the concave side facing the bolt head to ensure uniform load distribution; replace washers during each maintenance cycle (every 6 months)

3

Bolt M24×50 GB32.1-88 (M24×50-8.8)

Bolt Body: 40Cr Alloy Steel (Quenched & Tempered, Strength Grade 8.8); Thread: Precision Rolled (Grade 6g); Head: Countersunk Hexagon Socket (GB/T 32.1); Surface Treatment: Zinc Plating + Passivation; Shank: Smooth Precision Ground

1. Thread deformation due to over-tightening; 2. Bolt loosening from heavy-load vibration; 3. Corrosion of thread in drilling fluid-contaminated environments; 4. Shank wear due to friction with component holes

1. Use a torque wrench to apply the correct torque (320-350 N·m for M24-8.8 bolts, per GB/T 16823.1); do not exceed the rated torque to avoid thread deformation; 2. Use double nuts (slotted nut + cotter pin) for critical connections to enhance anti-loosening performance; recheck torque weekly during heavy drilling operations; 3. Clean the bolt with neutral detergent immediately after contact with drilling fluid; dry and apply anti-rust oil; 4. Ensure the component hole diameter matches the bolt shank (clearance ≤0.1mm); ream the hole if necessary to avoid shank friction

4

Washer 24 GB93-87 (24)

Washer Body: 65Mn Spring Steel (Heat-Treated); Surface Treatment: Zinc Plating; Type: Single-Coiled Spring Washer (GB/T 93); Inner Diameter: φ24; Outer Diameter: φ40; Thickness: 4mm

1. Spring fatigue and loss of elasticity due to long-term vibration; 2. Corrosion of steel substrate due to coating damage; 3. Cracking due to uneven load application

1. Replace spring washers every 6 months or if they show signs of flattening (loss of springiness); 2. Inspect the coating for scratches or peeling monthly; touch up with zinc-rich paint if damage is found; 3. Ensure the washer is installed flat (no tilting) to distribute load evenly; avoid using damaged washers (e.g., bent, cracked)

5

Bolt M16×35 GB32.1-88 (M16×35-8.8)

Bolt Body: 45# Steel (Quenched & Tempered, Strength Grade 8.8); Thread: Precision Rolled (Grade 6g); Head: Countersunk Hexagon Socket (GB/T 32.1); Surface Treatment: Zinc Plating + Passivation

1. Thread wear due to repeated assembly and disassembly; 2. Bolt loosening from light to moderate vibration; 3. Corrosion in high-humidity mining drilling environments; 4. Countersunk head damage from improper installation tools

1. Minimize unnecessary assembly and disassembly; replace bolts if thread wear (fit clearance ≥0.1mm) is detected; 2. Apply thread-locking adhesive (Loctite 222) for light-load connections to prevent loosening; 3. Store spare bolts in a dry, sealed container with desiccant; apply anti-rust oil before installation in humid environments; 4. Use a countersunk hexagon socket wrench to ensure full contact with the bolt head; avoid using flat-head screwdrivers that may damage the countersunk surface

6

Washer 16 GB93-87 (16)

Washer Body: 65Mn Spring Steel (Heat-Treated); Surface Treatment: Zinc Plating; Type: Single-Coiled Spring Washer (GB/T 93); Inner Diameter: φ16; Outer Diameter: φ26; Thickness: 2.5mm

1. Deformation due to mismatched bolt diameter (oversized bolt); 2. Corrosion of surface coating in damp underground mining environments; 3. Loss of elasticity due to long-term compression

1. Strictly match the washer to the bolt diameter (M16); do not use M16 washers with M20 bolts; 2. For underground mining applications, use galvanized washers with enhanced coating thickness; inspect for corrosion weekly; 3. Replace washers during each maintenance cycle; avoid reusing washers that have been flattened

7

Round Nut M160×3 (111.53.16.11)

Nut Body: 42CrMo Alloy Steel (Quenched & Tempered); Thread: Precision Tapped (Grade 6H); Surface Treatment: Black Oxide Coating; Type: Round Nut with Lock Groove (GB/T 812); Lock Groove: Precision Milled

1. Thread seizure due to insufficient lubrication during installation; 2. Nut loosening from heavy-load vibration; 3. Corrosion of black oxide coating in humid environments; 4. Lock groove damage from cotter pin installation

1. Apply molybdenum disulfide grease to threads before installation; use a spanner wrench to tighten the nut (avoid impact tools); 2. Install a cotter pin (matching the lock groove size) to prevent loosening; inspect the cotter pin weekly for wear or breakage; replace if damaged; 3. Apply anti-rust oil to the nut surface monthly; store spare nuts in a dry, oiled container; 4. Use a cotter pin of the correct diameter (do not force oversized cotter pins into the lock groove) to avoid groove damage

8

Washer 160 GB858-88 (160)

Washer Body: Q235 Steel (Hot-Rolled); Surface Treatment: Zinc Plating; Type: Curved Washer (GB/T 858); Inner Diameter: φ160; Outer Diameter: φ220; Thickness: 8mm

1. Deformation due to over-tightening of the round nut; 2. Corrosion of surface coating in salt-spray environments; 3. Wear of contact surface due to vibration

1. Tighten the round nut to the recommended torque (refer to Lanzhou LS mast technical manual); avoid over-tightening to prevent washer deformation; 2. For offshore applications, replace with 316L stainless steel washers; clean with fresh water daily; 3. Inspect the washer’s contact surface for wear monthly; replace if uneven wear exceeds 1mm

1

Felt Ring 190 (111.53.16.06)

Felt Material: Industrial Wool Felt (Density: 0.35-0.40 g/cm³); Inner Diameter: φ190mm; Outer Diameter: φ220mm; Thickness: 15mm; Treatment: Impregnated with Anti-Rust Oil

1. Degradation and hardening due to long-term absorption of dust and contaminated lubricant; 2. Fraying of felt fibers due to friction with rotating shaft; 3. Swelling and loss of sealing performance due to contact with drilling fluid

1. Inspect the felt ring monthly for hardening, fraying, or contamination; replace every 3 months or immediately if it loses flexibility; 2. Ensure the felt ring is properly installed (snug fit with the shaft, no gaps); avoid over-tightening to prevent excessive friction; 3. Keep the felt ring away from drilling fluid; clean the surrounding area with a brush weekly to remove dust; 4. Impregnate new felt rings with clean lubricating oil before installation to enhance sealing and reduce initial friction

2

Oil Cup M10×1 GB1152-79 (M10×1)

Cup Body: Carbon Steel (Zinc Plated); Lid: Carbon Steel (Zinc Plated); Thread: M10×1 (Metric Fine Thread); Sealing Gasket: NBR Rubber; Type: Straight Nozzle Oil Cup (GB/T 1152)

1. Clogging of oil nozzle due to contaminated lubricant or dust; 2. Leakage from damaged sealing gasket; 3. Corrosion of zinc coating in humid environments; 4. Thread damage during installation/removal

1. Clean the oil nozzle with a wire brush before refueling; use only clean, filtered lubricant (particle size ≤10μm); 2. Inspect the sealing gasket for cracks or hardening monthly; replace if damaged; 3. Apply anti-rust oil to the cup body and thread monthly; store spare oil cups in a dry container; 4. Install/remove the oil cup using a wrench (avoid hand-tightening with excessive force); ensure the thread is clean before installation to prevent cross-threading

3

Screw Plug M10×1 (111.53.16.02)

Plug Body: 45# Steel (Black Oxide Coating); Thread: M10×1 (Metric Fine Thread); Sealing Washer: Copper; Head: Hexagon Socket

1. Oil leakage due to damaged copper washer; 2. Thread wear due to repeated installation/removal; 3. Corrosion of plug body in drilling fluid-contaminated environments; 4. Hexagon socket damage from improper tool use

1. Replace the copper washer every time the screw plug is removed; ensure the washer is properly seated before tightening; 2. Minimize unnecessary removal of the screw plug; inspect threads for wear (e.g., burrs, deformation) before reinstallation; 3. Clean the plug and thread with diesel oil after contact with drilling fluid; dry and apply anti-rust oil; 4. Use a hexagon socket wrench of the correct size (avoid worn tools) to prevent socket damage; tighten the plug to the recommended torque (15-20 N·m)

1

Spacer φ190/φ170 (111.53.16.05)

Spacer Body: 45# Steel (Quenched & Tempered); Inner Diameter: φ170mm; Outer Diameter: φ190mm; Length: 50mm (Precision Ground); Surface Treatment: Black Oxide Coating

1. Deformation due to improper installation (excessive axial force); 2. Wear of end faces due to vibration-induced friction with bearings; 3. Corrosion of surface coating in humid environments

1. Install the spacer with a press fit (avoid hammering); ensure axial force during installation does not exceed 5kN (refer to Lanzhou LS mast assembly manual); inspect for deformation using a dial indicator (runout ≤0.02mm); 2. Lubricate the spacer end faces with lithium-based grease before installation to reduce friction; inspect end face wear every 6 months (replace if wear exceeds 0.1mm); 3. Apply anti-rust oil to the spacer surface monthly; store spare spacers in a dry, flat position to prevent bending

2

Through Cover (Ⅰ) (111.53.16.07)

Cover Body: Gray Cast Iron HT200; Surface Treatment: Shot Blasting + Epoxy Paint; Sealing Groove: Precision Milled; Mounting Holes: Precision Drilled (Interchangeability Grade H7)

1. Crack damage from impact during transportation or maintenance; 2. Sealing groove wear due to repeated assembly/removal of gaskets; 3. Corrosion of paint coating in salt-spray environments

1. Use protective packaging during transportation; handle the cover with care (avoid dropping or collision); inspect for cracks using dye penetrant testing (DPT) before installation; 2. Replace the sealing gasket every time the cover is removed; avoid scraping the sealing groove with sharp tools; 3. For offshore applications, apply marine-grade polyurethane topcoat annually; clean the cover surface with fresh water after exposure to salt spray; 4. Tighten the mounting bolts evenly (crosswise sequence) to prevent cover deformation

3

Adjustable Mat t=0.2/t=0.5 (111.53.16.08)

Mat Body: 65Mn Spring Steel; Thickness: 0.2mm/0.5mm (Precision Rolled); Surface Treatment: Phosphating + Oil Coating; Flatness: ≤0.01mm/m

1. Deformation due to excessive load; 2. Wear of contact surfaces due to repeated adjustments; 3. Corrosion of phosphating coating in humid environments

1. Calculate the applied load before use; ensure it does not exceed the mat’s rated load (0.5kN/mm² for 65Mn steel); replace mats if permanent deformation occurs; 2. Minimize repeated adjustments; use a feeler gauge to determine the required thickness before installation; 3. Store adjustable mats in a dry, flat container to prevent bending; apply anti-rust oil before use in humid environments

4

Through Cover (Ⅱ) (111.53.16.09)

Cover Body: Gray Cast Iron HT200; Surface Treatment: Shot Blasting + Epoxy Paint; Sealing Groove: Precision Milled; Mounting Holes: Precision Drilled (Interchangeability Grade H7)

1. Crack damage from impact during maintenance; 2. Sealing failure due to gasket degradation; 3. Corrosion of cast iron substrate due to paint peeling

1. Use a rubber mallet for installation/removal to avoid impact damage; inspect for cracks monthly; 2. Replace the sealing gasket every 6 months or if it shows signs of hardening/cracking; 3. Inspect the paint coating monthly; touch up with matching epoxy paint if peeling is found; 4. Ensure the cover is clean before installation (no dust or debris on the sealing surface) to prevent uneven pressure distribution

5

Locating Block δ10 (111.53.16.10)

Block Body: Q235 Steel (Hot-Rolled); Thickness: 10mm; Surface Treatment: Zinc Plating; Mounting Holes: Precision Drilled; Positioning Surface: Precision Ground (Flatness ≤0.02mm)

1. Wear of positioning surface due to vibration-induced friction; 2. Corrosion of zinc coating in humid environments; 3. Deformation due to improper installation (over-tightening of mounting bolts)

1. Lubricate the positioning surface with anti-wear grease monthly to reduce friction; inspect for wear every 6 months (replace if wear exceeds 0.1mm); 2. For underground mining applications, apply anti-corrosion spray weekly; 3. Tighten the mounting bolts to the recommended torque (avoid over-tightening) to prevent block deformation; use a level to verify the positioning surface flatness after installation

6

Foot Block δ14 (111.53.16.12)

Block Body: Q235 Steel (Hot-Rolled); Thickness: 14mm; Surface Treatment: Zinc Plating; Mounting Holes: Precision Drilled; Bearing Surface: Reinforced with Welding

1. Wear of bearing surface due to heavy-load bearing; 2. Corrosion of zinc coating in drilling fluid-contaminated environments; 3. Welding seam cracking due to impact

1. Inspect the bearing surface for wear monthly; rework or replace if wear exceeds 1mm; 2. Clean the block with neutral detergent immediately after contact with drilling fluid; dry and apply anti-rust oil; 3. Inspect the welding seam for cracks using DPT every 6 months; repair if cracks are found; 4. Ensure the block is installed on a flat, level surface to distribute load evenly

7

Baffle Plate δ20 (111.53.16.04)

Plate Body: Q345 Steel (Hot-Rolled); Thickness: 20mm; Surface Treatment: Shot Blasting + Anti-Rust Paint; Mounting Holes: Precision Drilled

1. Bending deformation due to impact from falling debris; 2. Corrosion of paint coating in humid environments; 3. Wear of edge due to friction with moving components

1. Install a protective guard around the baffle plate in high-debris areas; inspect for deformation monthly; straighten or replace if bent; 2. Apply anti-rust paint annually; inspect for corrosion monthly; 3. Ensure the baffle plate is properly spaced from moving components (clearance ≥5mm) to avoid friction; adjust if necessary

8

Baffle Plate (111.53.16.13)

Plate Body: Q235 Steel (Hot-Rolled); Thickness: 10mm; Surface Treatment: Zinc Plating; Mounting Holes: Precision Drilled

1. Corrosion of zinc coating in salt-spray environments; 2. Deformation due to uneven load application; 3. Edge damage from impact

1. For offshore applications, replace with 316L stainless steel baffle plates; rinse with fresh water daily; 2. Ensure the plate is installed to distribute load evenly; avoid concentrated loads; 3. Use a file to smooth any sharp edges after damage; inspect for edge damage monthly

9

Wire Line φ2 L=400 GB343-82 (φ2)

Wire Line Material: High-Carbon Steel (0.82-0.90%C); Diameter: φ2mm; Length: 400mm; Surface Treatment: Galvanized; Structure: 1×7 Stranded (GB/T 343)

1. Fatigue breakage due to repeated bending; 2. Corrosion of galvanized coating in humid environments; 3. Wear of strands due to friction with sharp edges

1. Avoid repeated bending of the wire line (minimum bending radius ≥20mm); replace if any broken strands are found; 2. Store the wire line in a dry, coiled position to prevent kinking; apply anti-rust oil before use; 3. Ensure the wire line does not come into contact with sharp edges (install protective sleeves if necessary); inspect for wear weekly