The BOS-DS60 is a heavy-duty portable line boring machine engineered for large diameter bore repair without dismantling or transporting equipment to a workshop. Designed specifically for demanding industrial environments, the machine handles bore diameters from 65mm to 600mm while maintaining exceptional machining accuracy directly on-site.
Built for mining equipment, large excavators, crushers, cranes, and heavy construction machinery, the DS60 delivers workshop-grade precision in field conditions. With a powerful 3800W servo motor producing 220 N.m of torque, the BOS-DS60 represents the heavy-duty evolution of the BOS-DS50 platform for larger and more demanding repair operations.
Learn about line boring machine in India — pan-India delivery, pricing, and operator training.
Starting from₹5,75,000ex-GST — contact for current pricing & configuration
The BOS-DS60 was developed for technicians and repair teams who work on some of the largest and most demanding equipment in the field. Every component is engineered to deliver consistent accuracy, higher torque, flexible configuration, and reliable performance in environments where downtime is expensive and precision cannot be compromised.
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MASSIVE BORE RANGE
The DS60 handles bore diameters from 65mm all the way up to 600mm, making it suitable for the largest earth movers and mining equipment in operation. Optional bearing supports extend capability to cover nearly every bore size encountered in heavy industry, allowing technicians to handle multiple machine categories with one versatile system.
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HIGH-TORQUE SERVO MOTOR
Powered by a 3800W servo motor delivering 220 N.m of output torque, the DS60 handles tough materials and thick-walled bores that smaller machines cannot efficiently process. Stepless speed regulation from 30 to 133 RPM gives operators complete control over machining conditions and cutting performance.
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PATENTED MODULAR TOOL HOLDER
The DS60 features a patented modular tool holder system that is more convenient to transport and adapt than traditional fixed-size holders. Instead of carrying multiple dedicated tooling assemblies, operators can configure the modular holder for different bore sizes quickly and efficiently on-site.
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MULTIPLE BEARING SUPPORT OPTIONS
Three bearing support types — spherical, I-type double-arm, and cross-type — allow the DS60 to align and stabilize across virtually every bore configuration encountered in the field. This flexibility makes the machine suitable for everything from excavator pin bores to large crusher and crane repair operations.
Five Powerful Functions in One Machine
The BOS-DS60 combines multiple repair and restoration functions into one integrated platform, reducing setup time, minimizing equipment movement, and improving overall productivity on-site. Operators can switch between machining and welding functions without complex reconfiguration, making the DS60 an efficient solution for heavy industrial maintenance teams.
LINE BORING
The DS60 performs both automatic and manual line boring with complete operator customization of hole diameter and feed rate. Precision servo motor control ensures consistent bore geometry across the entire 65-600mm range while achieving a fine surface finish of Ra 3.2(25)μm.
AUTOMATIC WELDING
Operators simply enter the bore diameter on the control panel and select welding mode. The DS60 automatically calculates rotational speed and axial feed settings, ensuring consistent weld deposition for bores ranging from 65mm to 600mm with 3-4mm weld width capability.
SECTOR WELDING
Sector welding allows the DS60 to repair elliptical and irregularly worn bores with programmable welding zones from 4mm to 299mm. This automated capability restores bore geometry accurately while reducing unnecessary heat input and material buildup.
JUMP WELDING
Jump welding automatically skips grease holes, keyways, and interrupted surfaces while maintaining a 15mm intermittent clearance. This eliminates the need for manual masking or grinding cleanup after welding and ensures cleaner restoration work.
FLANGE FACING
The DS60 flange facing attachment machines large bore surfaces from 160mm to 600mm diameter with automatic radial feed synchronized to spindle speed. This makes it ideal for restoring mounting faces and flange surfaces on crushers, cranes, and excavator components.
Understanding BOS welding modes
Visual guide to inner circle, jump, and sector welding
Technical Specifications
The BOS-DS60 is engineered specifically for heavy-duty field operations where machining precision, reliability, and durability are critical. Every parameter is optimized to deliver stable performance across large bore repair applications in construction, mining, industrial, and infrastructure environments.
MAIN PARAMETERS
Power3800W
Voltage220V / 380V
Hertz50Hz / 60Hz
Output Torque220 N.m
Speed30–133 RPM
Speed RegulationStepless
Axial Feed Speed0–0.5 (s)
LINE BORING
Line Boring Diameter65–600mm
Line Boring Bar DiameterØ60mm
Standard Bar Length2200mm
Axial Machining Length0.5–1000mm
Axial Machining Depth1.5mm
Radial Cutting Width0–3mm
Axial Cut Depth0–1.5mm
Cut Width0.02–1mm
Ellipticity Tolerance±0.02mm
Taper Angle Tolerance±0.02
Surface RoughnessRa 3.2(25) μm
Forward and Reverse OperationsYes
AUTO WELDING
Welding Diameter65–600mm
Weld Width3–4mm
Welding Gun Cable Length4540mm
Welding Torch Tube Lengths200/240/300/800mm
Axial Welding LengthLess than 1000mm
Axial Cut Depth0–1.5mm
Intermittent Welding Width15mm
Sector Welding Width4–299mm
Applicable Welding MachineCO2 / MIG 210–500
Recommended Wire Diameter0.8 / 1.0 / 1.2mm
FLANGE FACING
Machining Range160–600mm
Speed30–133 RPM
Radial Feed MethodAutomatic
BEARING SUPPORTS
Spherical Bearing SupportØ55–270mm
I-Type Double-Arm Support170–620mm
Cross-Type Support180–780mm
ID Mount Self-Aligning (Large)Ø340–650mm
ID Mount Self-Aligning (Small)Ø140–360mm
AXIAL FEED SCREW
Standard Length600mm
Maximum Custom Length1000mm
MODULAR TOOL HOLDER
Tool Holder Installation HoleØ14mm
Total Height560mm
Round Knife EdgeØ14mm
Square Knife Notch16mm
What's Inside the BOS-DS60
Every component inside the BOS-DS60 is built for demanding industrial repair environments where reliability and serviceability are essential. The modular design allows operators to quickly assemble, transport, maintain, and configure the system for different bore repair applications across multiple equipment categories.
Line Boring Bar
Spherical Bearing Support Frame
Bearing Support Assembly
Alignment and Bearing
Big Tool Holder (Modular)
Gearbox
Axial Feed Motor
Servo Motor (3800W)
Axial Feed Frame Assembly
Axial Feed Screw Bar
Three Bearing Support Configurations
The BOS-DS60 includes multiple bearing support configurations so operators can adapt the machine for virtually any field repair scenario. Each support system is engineered for stability, accurate alignment, and efficient setup across different equipment categories and bore sizes.
SPHERICAL BEARING SUPPORT
The standard spherical bearing support frame fits bore diameters from Ø55mm to 270mm, making it suitable for common excavator and backhoe pin bores. Quick-adjust support arms allow technicians to position and align the system rapidly while maintaining stable machining performance.
I-TYPE DOUBLE-ARM SUPPORT
The I-type bearing support uses a double-arm mounting structure and handles diameters from 170mm to 620mm. Its heavy-duty construction provides additional stability during large bore repair operations on stone crushers, mining machines, and heavy excavators.
CROSS-TYPE BEARING SUPPORT
The cross-type support extends capability to bore diameters from 180mm to 780mm, making the DS60 one of the most versatile portable line boring systems available. This support type is ideal for ultra-large industrial, crane, and mining equipment applications.
Where the BOS-DS60 Works
The BOS-DS60 is built for the toughest and largest equipment operating in demanding industrial environments. Its large machining range, high torque output, and multiple support systems make it ideal for on-site repair operations where downtime, transportation, and workshop delays create significant operational costs.
LARGE EXCAVATORS (20T–100T+)
Large mining and construction excavators often feature boom and arm pin bores exceeding 200mm in diameter. The DS60 repairs these bores directly on-site, eliminating expensive transportation and reducing machine downtime significantly.
STONE CRUSHERS & ROCK BREAKERS
Crusher pivot bores experience severe impact loads and continuous wear during operation. The DS60's 220 N.m torque output and large bore capability make it ideal for restoring crusher bores efficiently without complete disassembly.
CRANES & HEAVY LIFTING EQUIPMENT
Crane pivot and boom pin bores require accurate restoration to maintain structural safety and operational performance. The DS60 achieves ±0.02mm ellipticity tolerance, helping restore bores close to factory specification directly at the work site.
MINING & INDUSTRIAL MACHINERY
From draglines and rope shovels to industrial presses and plant machinery, the DS60 covers nearly every heavy-duty cylindrical bore repair application encountered in mining, manufacturing, and infrastructure industries worldwide.
BOS-DS50 vs BOS-DS60 — Which One Do You Need?
Both machines are engineered for portable on-site line boring and welding operations, but they are designed for different equipment classes and workload requirements. The DS50 is ideal for standard excavator and backhoe repair operations, while the DS60 is purpose-built for large excavators, crushers, cranes, and mining machinery requiring higher torque and larger bore capability.
Feature
BOS-DS50
BOS-DS60
Boring Range
55–160mm
65–600mm
Boring Bar
Ø50mm
Ø60mm
Motor Power
3100W
3800W
Output Torque
130 N.m
220 N.m
Spindle Speed
50–255 RPM
30–133 RPM
Bar Length
1600mm
2200mm
Best For
Standard excavators, backhoe loaders
Large excavators, crushers, cranes, mining
Welding Range
45–160mm
65–600mm
Flange Facing
120–300mm
160–600mm
Trusted by 1000+ Customers Across India & Internationally
BOS machines are trusted by infrastructure companies, mining operators, heavy equipment dealers, and industrial maintenance teams across multiple industries. Our portable line boring systems are used daily in demanding field conditions where accuracy, reliability, and service support are essential.
Answer these questions to find the right BOS machine
Frequently Asked Questions — BOS-DS60
Below are some of the most common technical and operational questions customers ask about the BOS-DS60 portable line boring machine. These answers are designed to help repair teams, equipment owners, and maintenance contractors better understand the machine's capabilities and applications.
The BOS-DS60 is the heavy-duty variant of the BOS portable line boring platform and is specifically designed for large bore repair operations. Compared to the BOS-DS50, the DS60 supports a much larger 65–600mm machining range, a stronger Ø60mm boring bar, and significantly higher output torque of 220 N.m. It also includes multiple bearing support configurations and a patented modular tool holder system for enhanced flexibility. The DS60 is best suited for large excavators, crushers, cranes, mining equipment, and industrial machinery requiring larger bore capability and heavier cutting performance.
The standard configuration of the BOS-DS60 supports boring and welding operations from 65mm to 600mm diameter. Additional bearing support configurations extend overall application capability even further depending on machine setup and alignment requirements. The spherical support covers up to 270mm, the I-type support handles up to 620mm, and the cross-type support expands capability up to 780mm diameter applications. Custom machine configurations and extensions are also available for specialized industrial requirements.
The correct bearing support depends on the size and configuration of the bore being repaired. The spherical support system covering Ø55–270mm is ideal for standard excavator and backhoe pin bores commonly encountered in construction equipment maintenance. The I-type double-arm support handles larger bores between 170mm and 620mm and is frequently used for crushers, heavy excavators, and industrial equipment. For ultra-large bore applications in cranes, mining machinery, and specialized industrial systems, the cross-type support expands capability up to 780mm. BOS also offers ID mount self-aligning systems for internal bore mounting where traditional external supports cannot be used.
Yes, the BOS-DS60 is designed as a complete 5-function repair platform capable of both welding and boring operations within the same setup. The welding attachment mounts directly onto the same boring bar assembly, eliminating the need for repeated alignment or repositioning between repair stages. Operators simply input bore dimensions into the control system and select the required welding mode, including spiral, sector, jump, or bore welding. Once material buildup is completed, the machine can immediately switch to precision boring mode for final machining and finishing operations.
Traditional portable line boring machines often require separate dedicated tool holders for different bore sizes, increasing tooling costs and transportation requirements. The BOS-DS60 uses a patented modular tool holder system that can be assembled and configured for multiple bore ranges using one adaptable platform. This significantly reduces the amount of equipment technicians need to carry to remote job sites while improving setup flexibility. The modular holder includes a total height of 560mm with Ø14mm round knife edge compatibility and 16mm square knife notch positions for versatile cutting tool installation.
The BOS-DS60 operates on either 220V or 380V industrial power at both 50Hz and 60Hz frequency standards. The main drive system uses a powerful 3800W servo motor supported by an independent axial feed motor for stable and controlled machining performance. For remote field deployment, the machine is generator compatible, and a properly rated 5–6 kVA generator is typically sufficient for standard operation. Customers can specify voltage requirements during ordering to ensure compatibility with local power infrastructure and regional electrical standards.
The BOS-DS60 is engineered to achieve highly precise machining tolerances suitable for heavy industrial repair operations. The machine maintains ellipticity tolerance of ±0.02mm and taper angle tolerance of ±0.02 while delivering surface roughness values of Ra 3.2(25) μm. Stepless speed regulation combined with servo motor positioning control gives operators exceptional control over feed rate and cutting conditions. This level of precision allows restoration of worn bores to near-factory specifications across machining lengths up to 1000mm.
The standard boring bar supplied with the BOS-DS60 measures Ø60mm × 2200mm and is suitable for most heavy equipment repair operations. For larger or specialized applications, custom boring bar lengths can be manufactured using the required workpiece dimensions and machine allowance calculations. The axial feed screw is supplied as standard in 600mm length and can be customized up to 1000mm depending on operational requirements. Both forward and reverse machining operations are supported for increased versatility during repair work.
The BOS-DS60 is widely used across heavy construction, mining, infrastructure, marine, industrial, and energy sectors. Common applications include large excavators, crushers, rope shovels, cranes, thermal power plant machinery, steel plant equipment, road construction machinery, and industrial presses. Any industry operating heavy equipment with cylindrical bore wear can benefit from portable on-site repair using the DS60. Its large machining range and multiple support systems make it adaptable across a broad variety of industrial repair scenarios.
Yes, PR Crane & Earthmovers provides complete operator training and after-sales technical support for every BOS-DS60 installation. Customers receive operational guidance, setup assistance, and troubleshooting support directly from the BOS technical team. Spare parts and service assistance are available through the Udaipur head office and Bangalore branch network, ensuring fast support for domestic and international customers. With more than 1000 customers served globally, BOS continues to provide long-term service support for field repair professionals.
Get in Touch with Our Team
Contact the BOS team for BOS-DS60 pricing, technical consultation, machine demonstrations, or application guidance for your repair operations. Our specialists can help you choose the correct configuration based on your equipment type, bore range, and operational requirements.
Head Office
352, B-Block, Transport Nagar, Balicha,
Udaipur, Rajasthan – 313002
Thank you for reaching out. Our team will contact you within one business day. Meanwhile, download
the BOS-DS60 product brochure for full specifications and application details.
