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Forged Excavator Pin Bracket and Heavy-Duty Hinge Support Seat with Closed-Die Forging Quenching and Tempering and ±0.05 mm CNC Machining Tolerance
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Forged Excavator Pin Bracket and Heavy-Duty Hinge Support Seat with Closed-Die Forging Quenching and Tempering and ±0.05 mm CNC Machining Tolerance

MOQ: 1000pcs
Price: $0.5-2
Standard Packaging: Wooden case
Delivery Period: 30 days
Payment Method: D/A,T/T,D/P
Supply Capacity: 10000PCS/month
Details Information
Product Description
Detail Information
Place of Origin
Qingdao, China
Brand Name
Qingdao Sande Tech Co.,Ltd
Certification
ISO, DIN, AISI, ASTM, BS, JIS, etc.
Model Number
OEM
Design:
Customized Drawing Or Sample
Application:
Machinery
Molding Technics:
Pressure Casting
Warranty:
3-5 Years, Up To Your Material
Quality Control:
ISO9001,100% Inspection Before Shipping
Production Capacity:
100,000 Pieces Per Month
Product Description
Forged Excavator Pin Bracket & Heavy-Duty Hinge Support Seat
Product Overview

Our forged solutions provide critical structural components for heavy construction machinery, including the Forged Excavator Pin Bracket (H-link/boom bracket) and Heavy-Duty Hinge Support Seat (hydraulic cylinder bracket/stabilizer pivot seat).

These components serve as primary articulation and load-transfer interfaces in excavators, backhoes, dozers, concrete pump trucks, and forestry equipment. Our closed-die forging process produces components with unbroken grain flow lines that follow geometric contours, eliminating internal voids, porosity, and weak heat-affected zones for superior fatigue resistance and impact toughness.

All products undergo:

  • Precision CNC machining of pin bores, mounting faces, and hinge slots
  • Heat treatment (quenching and tempering) for uniform hardness
  • Anti-corrosion coating (epoxy, zinc-rich primer, or phosphating) for outdoor durability

Our components meet or exceed OEM specifications for excavator models ranging from 1-ton mini-excavators to 100-ton heavy quarry machines.


Product Specifications
Forged Excavator Pin Bracket (H-Link / Boom Bracket)
Parameter Specification
Process Closed-die forging (drop forging / press forging)
Applicable Excavator Weight 1 ton to 100+ tons
Materials Q345B, 35CrMo, 40Cr, 42CrMo, or OEM-specified alloys
Forging Ratio ≥ 3:1 (ensuring internal densification)
Heat Treatment Quenching + tempering (HB 220-280 or customer-specified)
CNC Machining Tolerance ±0.05 mm for pin bores; ±0.1 mm for mounting interfaces
Pin Bore Diameter Range 30 mm to 180 mm
Surface Finish (Ra) 1.6 - 3.2 µm for bearing surfaces
Coating Epoxy primer + polyurethane topcoat (≥120 µm DFT)
Non-Destructive Testing Magnetic particle inspection (MPI) or ultrasonic testing (UT) available
Heavy-Duty Hinge Support Seat (Cylinder Bracket / Stabilizer Pivot)
Parameter Specification
Process Closed-die forging or upset forging for thick-wall sections
Load Capacity Designed for static loads up to 50+ tons per hinge point
Materials 35CrMo, 42CrMo, 45# steel, or ductile cast iron
Heat Treatment Normalizing + tempering (HB 200-250) or induction hardening of pin holes
CNC Machining Tolerance ±0.1 mm for hinge slot width; ±0.05 mm for pivot bore
Wall Thickness Uniformity ±0.5 mm after machining
Surface Finish (Ra) 3.2 µm for unpainted mating surfaces
Corrosion Protection Zinc phosphating + powder coating (≥80 µm) for salt spray resistance up to 500 hours
Traceability Material lot number stamped + test certificate EN 10204 3.1 available

Product Advantages
Forged Excavator Pin Brackets
  • Superior Grain Flow: Continuous grain fibers prevent crack initiation under cyclic digging forces
  • Higher Impact Toughness: Absorb sudden shock loads without fracturing (Charpy V-notch impact values exceed 50 J at -20°C)
  • No Internal Defects: Eliminates shrinkage cavities, porosity, and cold shuts common in cast brackets
  • Dimensionally Stable: Maintain geometry with ±0.05 mm pin bore alignment
  • Weight Optimization: 10-15% weight reduction compared to over-engineered castings
Heavy-Duty Hinge Support Seats
  • Thick-Section Integrity: Solid, void-free thick walls (30-80 mm) resist deformation
  • Bolt-On Ready: Precision-machined mounting faces for direct OEM replacement
  • Wear-Resistant Pin Holes: Induction hardening extends bushing and pin life by 2x
  • Corrosion Resistance: Multi-layer coating withstands 500+ hours salt spray testing
  • 100% Interchangeability: Perfectly mirrored left/right components without field modification
Shared Advantages
  • Full Traceability: Unique laser-etched ID linking to material certs and inspection reports
  • Rapid Prototyping: 3D simulation of grain flow and stress analysis before tooling
  • Cost-Effective: More economical than castings or fabrications at quantities above 500 pieces

Product Applications
Industry / Equipment Component Usage Recommended Product
Hydraulic Excavators (1-100 ton) Boom-to-arm connection (H-link) Forged Excavator Pin Bracket
Backhoe Loaders Dipper arm pivot bracket Forged Pin Bracket
Bulldozers Cylinder hinge seat for blade tilt & ripper Heavy-Duty Hinge Support Seat
Concrete Pump Trucks Outrigger stabilizer pivot Hinge Support Seat
Forestry Harvesters Boom articulation joints (high-impact) Forged Pin Bracket (42CrMo)
Off-Highway Trucks Suspension hinge brackets Heavy-Duty Hinge Support Seat
Material Handlers (Scrap/Port) Grapple arm pivot brackets Forged Pin Bracket (wear-resistant coating)
Skid Steer Loaders Lift arm hinge supports Hinge Support Seat (compact design)

Typical Replacement Interval:

  • Forged pin brackets: 8,000-12,000 operating hours (2-3x longer than cast equivalents)
  • Hinge support seats: 6,000-10,000 hours or when pin bore wear exceeds 0.5 mm oversize

Frequently Asked Questions
Why choose a forged pin bracket over a cast or welded one?
Forged brackets have continuous grain flow around pin holes and stress concentrations, providing 30-50% higher fatigue strength than castings. Welded assemblies suffer from heat-affected zone softening and potential weld porosity.
What is the typical lead time for a custom bracket?
For existing forging tooling: 2-3 weeks. For new custom designs requiring forging dies: 6-8 weeks including die manufacturing and sample approval.
Do you provide brackets for older/discontinued excavator models?
Yes. We maintain forging tooling for many legacy models from Caterpillar, Komatsu, Hitachi, Kobelco, and Hyundai.
Can you add hardened bushings or replaceable wear sleeves?
Yes. We can machine pin bores for press-fit bronze or PTFE-lined bushings, or induction-harden the bore surface for bushing-free designs.
What heat treatment do you apply?
Standard treatment is quenching and tempering for tensile strength of 850-1000 MPa. We adjust heat treatment based on operating conditions.
Do you provide test reports for material certification?
Yes. Every lot can be accompanied by EN 10204 Type 3.1 mill certificates and third-party inspection reports from SGS, BV, or TÜV.
What is the maximum size bracket you can forge?
Our 4,000-ton forging press can produce pin brackets weighing up to 500 kg individually.
How should I store coated brackets before installation?
Store indoors on wooden pallets. Standard coating provides 6 months outdoor storage protection.
Can you supply a complete pin, bushing, and bracket kit?
Yes. We can supply machined chromed pins, induction-hardened bushings, grease nipples, and seals as ready-to-install kits.
What is your warranty on forged components?
12-month warranty against material defects and forging flaws, with coverage for premature wear if inspection confirms compliance with tolerances.
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Hot Forged Components,  

Hot Forged Parts

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Products
PRODUCTS DETAILS
Products

Hot Forging Parts

Steel Forging Parts

Aluminum Forging Parts

Drop Forged Chain

Conveyor Chain

Machining Parts

Copper Forging Parts

Zinc Zamak Forging Parts
name
  • name
  • name
  • name
  • name
  • name
Forged Excavator Pin Bracket and Heavy-Duty Hinge Support Seat with Closed-Die Forging Quenching and Tempering and ±0.05 mm CNC Machining Tolerance
MOQ: 1000pcs
Price: $0.5-2
Standard Packaging: Wooden case
Delivery Period: 30 days
Payment Method: D/A,T/T,D/P
Supply Capacity: 10000PCS/month
Detail Information
Product Description
Detail Information
Place of Origin
Qingdao, China
Brand Name
Qingdao Sande Tech Co.,Ltd
Certification
ISO, DIN, AISI, ASTM, BS, JIS, etc.
Model Number
OEM
Design:
Customized Drawing Or Sample
Application:
Machinery
Molding Technics:
Pressure Casting
Warranty:
3-5 Years, Up To Your Material
Quality Control:
ISO9001,100% Inspection Before Shipping
Production Capacity:
100,000 Pieces Per Month
Minimum Order Quantity:
1000pcs
Price:
$0.5-2
Packaging Details:
Wooden case
Delivery Time:
30 days
Payment Terms:
D/A,T/T,D/P
Supply Ability:
10000PCS/month
Product Description
Forged Excavator Pin Bracket & Heavy-Duty Hinge Support Seat
Product Overview

Our forged solutions provide critical structural components for heavy construction machinery, including the Forged Excavator Pin Bracket (H-link/boom bracket) and Heavy-Duty Hinge Support Seat (hydraulic cylinder bracket/stabilizer pivot seat).

These components serve as primary articulation and load-transfer interfaces in excavators, backhoes, dozers, concrete pump trucks, and forestry equipment. Our closed-die forging process produces components with unbroken grain flow lines that follow geometric contours, eliminating internal voids, porosity, and weak heat-affected zones for superior fatigue resistance and impact toughness.

All products undergo:

  • Precision CNC machining of pin bores, mounting faces, and hinge slots
  • Heat treatment (quenching and tempering) for uniform hardness
  • Anti-corrosion coating (epoxy, zinc-rich primer, or phosphating) for outdoor durability

Our components meet or exceed OEM specifications for excavator models ranging from 1-ton mini-excavators to 100-ton heavy quarry machines.


Product Specifications
Forged Excavator Pin Bracket (H-Link / Boom Bracket)
Parameter Specification
Process Closed-die forging (drop forging / press forging)
Applicable Excavator Weight 1 ton to 100+ tons
Materials Q345B, 35CrMo, 40Cr, 42CrMo, or OEM-specified alloys
Forging Ratio ≥ 3:1 (ensuring internal densification)
Heat Treatment Quenching + tempering (HB 220-280 or customer-specified)
CNC Machining Tolerance ±0.05 mm for pin bores; ±0.1 mm for mounting interfaces
Pin Bore Diameter Range 30 mm to 180 mm
Surface Finish (Ra) 1.6 - 3.2 µm for bearing surfaces
Coating Epoxy primer + polyurethane topcoat (≥120 µm DFT)
Non-Destructive Testing Magnetic particle inspection (MPI) or ultrasonic testing (UT) available
Heavy-Duty Hinge Support Seat (Cylinder Bracket / Stabilizer Pivot)
Parameter Specification
Process Closed-die forging or upset forging for thick-wall sections
Load Capacity Designed for static loads up to 50+ tons per hinge point
Materials 35CrMo, 42CrMo, 45# steel, or ductile cast iron
Heat Treatment Normalizing + tempering (HB 200-250) or induction hardening of pin holes
CNC Machining Tolerance ±0.1 mm for hinge slot width; ±0.05 mm for pivot bore
Wall Thickness Uniformity ±0.5 mm after machining
Surface Finish (Ra) 3.2 µm for unpainted mating surfaces
Corrosion Protection Zinc phosphating + powder coating (≥80 µm) for salt spray resistance up to 500 hours
Traceability Material lot number stamped + test certificate EN 10204 3.1 available

Product Advantages
Forged Excavator Pin Brackets
  • Superior Grain Flow: Continuous grain fibers prevent crack initiation under cyclic digging forces
  • Higher Impact Toughness: Absorb sudden shock loads without fracturing (Charpy V-notch impact values exceed 50 J at -20°C)
  • No Internal Defects: Eliminates shrinkage cavities, porosity, and cold shuts common in cast brackets
  • Dimensionally Stable: Maintain geometry with ±0.05 mm pin bore alignment
  • Weight Optimization: 10-15% weight reduction compared to over-engineered castings
Heavy-Duty Hinge Support Seats
  • Thick-Section Integrity: Solid, void-free thick walls (30-80 mm) resist deformation
  • Bolt-On Ready: Precision-machined mounting faces for direct OEM replacement
  • Wear-Resistant Pin Holes: Induction hardening extends bushing and pin life by 2x
  • Corrosion Resistance: Multi-layer coating withstands 500+ hours salt spray testing
  • 100% Interchangeability: Perfectly mirrored left/right components without field modification
Shared Advantages
  • Full Traceability: Unique laser-etched ID linking to material certs and inspection reports
  • Rapid Prototyping: 3D simulation of grain flow and stress analysis before tooling
  • Cost-Effective: More economical than castings or fabrications at quantities above 500 pieces

Product Applications
Industry / Equipment Component Usage Recommended Product
Hydraulic Excavators (1-100 ton) Boom-to-arm connection (H-link) Forged Excavator Pin Bracket
Backhoe Loaders Dipper arm pivot bracket Forged Pin Bracket
Bulldozers Cylinder hinge seat for blade tilt & ripper Heavy-Duty Hinge Support Seat
Concrete Pump Trucks Outrigger stabilizer pivot Hinge Support Seat
Forestry Harvesters Boom articulation joints (high-impact) Forged Pin Bracket (42CrMo)
Off-Highway Trucks Suspension hinge brackets Heavy-Duty Hinge Support Seat
Material Handlers (Scrap/Port) Grapple arm pivot brackets Forged Pin Bracket (wear-resistant coating)
Skid Steer Loaders Lift arm hinge supports Hinge Support Seat (compact design)

Typical Replacement Interval:

  • Forged pin brackets: 8,000-12,000 operating hours (2-3x longer than cast equivalents)
  • Hinge support seats: 6,000-10,000 hours or when pin bore wear exceeds 0.5 mm oversize

Frequently Asked Questions
Why choose a forged pin bracket over a cast or welded one?
Forged brackets have continuous grain flow around pin holes and stress concentrations, providing 30-50% higher fatigue strength than castings. Welded assemblies suffer from heat-affected zone softening and potential weld porosity.
What is the typical lead time for a custom bracket?
For existing forging tooling: 2-3 weeks. For new custom designs requiring forging dies: 6-8 weeks including die manufacturing and sample approval.
Do you provide brackets for older/discontinued excavator models?
Yes. We maintain forging tooling for many legacy models from Caterpillar, Komatsu, Hitachi, Kobelco, and Hyundai.
Can you add hardened bushings or replaceable wear sleeves?
Yes. We can machine pin bores for press-fit bronze or PTFE-lined bushings, or induction-harden the bore surface for bushing-free designs.
What heat treatment do you apply?
Standard treatment is quenching and tempering for tensile strength of 850-1000 MPa. We adjust heat treatment based on operating conditions.
Do you provide test reports for material certification?
Yes. Every lot can be accompanied by EN 10204 Type 3.1 mill certificates and third-party inspection reports from SGS, BV, or TÜV.
What is the maximum size bracket you can forge?
Our 4,000-ton forging press can produce pin brackets weighing up to 500 kg individually.
How should I store coated brackets before installation?
Store indoors on wooden pallets. Standard coating provides 6 months outdoor storage protection.
Can you supply a complete pin, bushing, and bracket kit?
Yes. We can supply machined chromed pins, induction-hardened bushings, grease nipples, and seals as ready-to-install kits.
What is your warranty on forged components?
12-month warranty against material defects and forging flaws, with coverage for premature wear if inspection confirms compliance with tolerances.
Tags: 

Metal Forging Parts,

Hot Forged Components,

Hot Forged Parts

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