Technical Report: Adapter Sleeves, Lock Nuts and Lock Washers
2025-11-26
1. Material Composition
· Adapter Sleeves:
· Core Material: High-carbon bearing steel (e.g., GCr15) with surface hardness HRC 58–62 for wear resistance and fatigue strength
· Surface Treatment: Phosphating or black oxide coatings to reduce corrosion in industrial environments
· Lock Nuts:
· Steel Variants: Carbon steel (AISI 1045) or stainless steel (AISI 304) for high torque resistance
· Thread Design: Metric fine threads (e.g., Tr1000×8) for precise axial adjustment in bearing assemblies
· Lock Washers:
· Stainless Steel: AISI 316 for chemical resistance in marine or food-grade applications
· Star Teeth Design: Precision-stamped edges for vibration resistance and torque retention (≤5% loss after 10⁴ cycles)
2. Structural Design
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Component
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Key Features
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Adapter Sleeves
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Tapered inner bore (1:12 ratio) and threaded ends for radial fixation of bearings
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Lock Nuts
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Hexagonal or flanged design with integrated grooves for cotter pin insertion
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Lock Washers
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Double-lip raised edges or star-shaped teeth to prevent loosening under cyclic loads
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3. Manufacturing Processes
00001. Adapter Sleeves:
· Heat Treatment: Induction hardening and tempering to stabilize dimensional accuracy (±0.02 mm)
· Grinding: CNC cylindrical grinding for surface roughness ≤Ra 0.4 μm
00002. Lock Nuts:
· Cold Forging: High-pressure forming to minimize material waste and enhance thread integrity
· Thread Rolling: ISO metric threads with tolerance class 6g for compatibility with adapter sleeves
00003. Lock Washers:
· Laser Cutting: Precision alignment of teeth geometry (≤±0.1 mm deviation)
· Stress Relief Annealing: Eliminate internal stresses after stamping
4. Performance Parameters
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Parameter
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Adapter Sleeves
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Lock Nuts
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Lock Washers
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Max Load Capacity
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150–300 kN (d1=500–1000 mm)37
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50–200 kN axial load67
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10–50 kN clamping force15
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Temperature Range
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-20°C to +150°C47
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-30°C to +120°C6
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-50°C to +200°C5
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Torque Resistance
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N/A
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200–800 N·m (flange nuts)67
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80–90% torque retention5
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5. Industrial Applications
· Bearing Assembly:
· Adapter sleeves (e.g., H311, AHX3126) secure spherical roller bearings (e.g., 23126CCK/W33) in mining equipment
· Automotive Transmissions:
· Lock nuts (Tr530×6) and star-tooth washers stabilize wheel bearings under dynamic loads
· Heavy Machinery:
· Stainless steel lock washers prevent corrosion in conveyor systems exposed to moisture
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Hunan Jintai Hardware And Machinery Co.,Ltd
Rm.426, Hunan International Commerce Centre,Jintai Square,410001 Changsha,Hunan,P.R.China
Contact: Ms. Susan Shi
Cell(whatsapp): +86 135-1748-9983
(Chat Online)
