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Excavator Boom and Arm Manufacturing
NG Attachments manufactures heavy-duty excavator boom and arm assemblies for standard earthmoving, quarry work, demolition, infrastructure, utility excavation, severe-duty construction and special engineering applications. We produce standard mono booms, excavator arms / sticks, reinforced front attachment structures and custom-engineered boom and arm solutions according to original machine geometry and project-specific working requirements.
In excavator design, the boom is the main structural member connected to the upper frame and responsible for primary lifting load transfer, while the arm transfers digging force, reach motion and bucket-side working loads. For this reason, boom and arm production is not only a fabrication process but a structural engineering task requiring accurate geometry, reliable plate design, reinforced pivot zones, precision pin bore machining and durable welding quality.
NG Attachments manufacturing scope: excavator boom production, excavator arm manufacturing, custom stick fabrication, boom and arm replacement structures, reinforced front-end fabrication, reverse engineering, pin bore machining, bushing housing preparation and hydraulic line routing support.
What Is an Excavator Boom and Arm?
The excavator boom is the primary front structural member of the machine. It is mounted to the upper structure and works with the boom cylinders to lift and position the working equipment. The excavator arm, also called the stick or dipper arm, is connected to the boom by pin joints and controls digging movement, forward reach and force transfer toward the bucket or working attachment.
Under real site conditions, both boom and arm operate under repeated dynamic loads, cyclic stresses, digging resistance, impact forces and local stress concentration around pivot points and cylinder connections. This is why a correctly manufactured boom and arm set must maintain structural reliability, dimensional accuracy and OEM-compatible motion geometry.
NG Attachments Boom and Arm Manufacturing Capabilities
| Capability | Description | Typical Benefit |
|---|
| Standard Boom Manufacturing | Production of OEM-compatible mono boom structures for crawler and wheeled excavators. | Maintains original digging kinematics and lifting geometry. |
| Excavator Arm / Stick Production | Custom arm fabrication for general excavation, heavy-duty service and machine-specific replacement. | Reliable reach control and digging performance. |
| Reinforced Structural Solutions | Additional reinforcement in pivot zones, cylinder ear locations and heavy-stress regions. | Improved service life for severe-duty applications. |
| Pin Bore Machining | Precision boring and machining of critical connection points after fabrication. | Better alignment, lower wear and correct fit. |
| Bushing Housing Preparation | Accurate housing preparation for bushing systems in boom and arm pin locations. | Stable operation and easier maintenance planning. |
| Hydraulic Routing Support | Preparation for protected hose routing, pipe fixing points and hammer line layout if required. | Cleaner service layout and better field durability. |
| Reverse Engineering | Measurement-based reproduction from existing parts, damaged units or project references. | Supports fast replacement and custom development. |
Engineering Approach for Excavator Boom and Arm Production
A reliable excavator boom and arm design must handle bending loads, repeated excavation cycles, cylinder reaction forces, local stress concentration and real working impacts coming from terrain resistance. In structural terms, the boom carries the main upper-side load path, while the arm transmits digging force toward the bucket or working attachment. Therefore, correct plate layout, smooth load transition, proper pivot reinforcement and dimensional stability are essential.
NG Attachments focuses on the core requirements of practical excavator front-end manufacturing:
- OEM-compatible boom and arm geometry
- Correct pivot center positioning
- Controlled plate thickness distribution
- Reinforced cylinder ear and pin connection zones
- Reliable welding sequence and fabrication discipline
- Accurate bore machining and alignment
- Hydraulic routing compatibility for working service
- Project-based reinforcement for harsh environments
Excavator Boom and Arm Solutions by Equipment Type
Standard Crawler Excavator Boom and Arm
Suitable for general excavation, loading, trenching, utility work, site development and infrastructure projects. These are the most common boom and stick structures used on medium and large crawler excavators worldwide.
Wheeled Excavator Boom and Stick
Designed for municipal, roadwork, urban maintenance and mobility-focused excavation applications where fast relocation and compact site adaptation are important.
Heavy-Duty Excavator Boom and Arm
Manufactured for demanding rock, quarry, demolition-support and high-load service conditions where front structure durability becomes critical.
Demolition and Special Application Front Structures
Project-based boom and arm solutions for special jobs such as reinforced demolition service, difficult access work and attachment-driven field operations.
Long Reach and Custom Geometry Configurations
Custom-engineered boom and arm layouts for canal cleaning, slope shaping, dredging support and special reach requirements.
Excavator Brands and Model Families We Can Support
NG Attachments can support a wide range of excavator brands and model families depending on machine class, technical data, reverse engineering scope and project requirements. We work on standard replacement structures as well as project-specific boom and arm fabrication.
| Brand | Machine Families | Example Models / Series | Boom & Arm Scope |
|---|
| Caterpillar | Mini, small, medium, large, wheeled, long reach, demolition excavators | 305, 308, 315, 320, 323, 330, 336, 340, 349, M315, M318, M320 | OEM-compatible boom production, arm replacement, reinforced fabrication |
| Komatsu | Small, mid-size, large, wheeled and mining excavators | PC88, PC130, PC138, PC200, PC210, PC290, PC360, PC490, PC650, PW series | Standard boom and stick manufacturing, custom structural adaptation |
| Hitachi | Mini, crawler, large construction, mining and special front excavators | ZX85, ZX130, ZX160, ZX210, ZX225, ZX350, ZX490, EX mining series | Boom and arm fabrication for general and severe-duty service |
| Volvo CE | Compact, crawler and wheeled excavators | EC55, EC140, EC210, EC220, EC250, EC300, EC380, EW series | Replacement booms, custom sticks and reinforced front structures |
| Hyundai | Compact, crawler and wheeled excavators | R80, R140, R210, R220, R260, R330, HX series, HW series | Boom-arm production, geometry-based replacement and custom fabrication |
| DEVELON / Doosan | Crawler and large excavator families | DX140, DX225, DX300, DX350, DX420, DX490 and equivalent series classes | Standard and reinforced boom / stick fabrication |
| JCB | Tracked excavators and heavy excavator families | JS and related tracked excavator series | Replacement and custom-engineered front-end structures |
| Kobelco | Conventional, SR and mini compact excavators | SK75SR, SK85MSR, SK140SRLC, SK210, SK260, SK350, SK500 | Custom boom and arm structures based on technical reference data |
| Liebherr | Crawler, wheeled, demolition and mining excavators | R series, A series and project-based model groups | Heavy structural fabrication and project-based replacements |
| SANY | Mini, medium and large excavators | SY series according to tonnage class | Reverse-engineered boom and arm production |
| XCMG | Crawler and wheeled excavators | XE series according to market and tonnage class | Custom boom / stick production on request |
| LiuGong | Construction excavator families | 9-series and regional excavator classes | Boom and arm fabrication for replacement demand |
| CASE / New Holland / Sunward | General construction excavators by region | Mid-size and heavy excavator groups depending on market | Project-based reverse engineering and custom manufacturing |
Applications of Custom Excavator Boom and Arm Manufacturing
| Application | Requirement | NG Attachments Solution |
|---|
| General Earthmoving | Standard working range and durable front structure | OEM-compatible boom and arm production |
| Quarry and Rock Service | Higher resistance against impact and heavy digging loads | Reinforced structural fabrication |
| Demolition Support | Front-end durability under attachment-driven severe duty | Project-based boom and arm strengthening |
| Utility and Trenching Work | Stable geometry and reliable reach control | Machine-specific stick and boom fabrication |
| Replacement After Damage | Dimensional compatibility and structural reliability | Reverse engineering and replacement manufacturing |
| Special Projects | Custom geometry or site-driven structural needs | Project-specific boom and arm design support |
Why NG Attachments?
NG Attachments combines heavy fabrication capability with practical attachment engineering experience. Our focus is not only to manufacture a boom or stick that looks correct, but to produce a structure that works reliably in the field, preserves machine movement logic and supports long-term service use.
- Project-based engineering and fabrication logic
- Heavy-duty manufacturing background
- Machine-brand flexibility
- OEM-compatible geometry focus
- Precision machining support for connection points
- Export-oriented communication and production discipline
Frequently Asked Questions
Can you manufacture only the excavator arm or only the boom?
Yes. We can manufacture only the boom, only the arm, or the complete boom and arm set depending on your replacement or project requirement.
Compatible Excavator Models
NG Attachments manufactures excavator boom and arm assemblies compatible with a wide range of global models including:Caterpillar CAT 301, 302, 303, 305, 308, 315, 320, 323, 330, 336, 340, 349, 352,
Komatsu PC30, PC55, PC88, PC130, PC200, PC210, PC240, PC290, PC360, PC490, PC650,
Hitachi ZX17, ZX35, ZX85, ZX130, ZX210, ZX225, ZX350, ZX470, ZX490,
Volvo EC55, EC140, EC210, EC220, EC250, EC300, EC380, EC480, EC750,
Hyundai R55, R80, R140, R210, R220, R260, R330, R520,
Doosan DX140, DX225, DX300, DX350, DX420, DX490,
Liebherr R914, R924, R934, R946, R956, R970, R9800,
Kobelco SK75, SK140, SK210, SK260, SK350, SK500,
CASE CX130, CX210, CX250, CX300, CX350,
JCB JS130, JS160, JS200, JS220, JS300,
SANY SY75, SY135, SY215, SY335, SY500,
XCMG XE135, XE215, XE370, XE500, XE700
