Precision Boring for Large Couplings & Flanges
Designed specifically for boring precision interference-fit bolt holes in large couplings and flanges.
This machine is engineered for boring precision coupling bolt holes in turbines and other coupling applications, optimized for machining fit bolts in large couplings. With features like rapid installation, high-precision machining, and excellent bore roundness and straightness, it maximizes the reduction of turbine overhaul downtime.
Powerful, Versatile & Easy to Use
Precision Alignment: Quickly produces accurately aligned bolt holes in a single pass.
No Honing Required: Eliminates the need for lengthy honing operations.
Universal Fit: Universal coupling mounting system compatible with all turbine couplings on the market.
Easy Inspection: Allows for quick removal of the boring bar without altering machine settings, facilitating easy measurement and inspection of the bore.
Feed Options: Various feed methods available to meet different requirements.
Reverse Feed: Reversible mechanical feed is ideal for confined spaces, enabling back-spotfacing and counterboring.
Drive Variety: Multiple drive options available — hydraulic, pneumatic, or contact a sales representative for custom electric drive solutions.
Tooling Flexibility: Easily switch between High-Speed Steel (HSS) and Carbide tooling.
Compact Design
Rigid & Compact: Extremely rigid yet compact structure.
Tight Spaces: Easily installed in confined spaces.
One-Person Operation: Installation and setup can be completed by a single person.
Minimal Clearance: The rotary drive unit and axial feed system require only a 2.0-inch (50.8 mm) gap between the coupling hub OD and the bolt circle.
Specifications (Customized Configurations Are Available)
| Item | Imperial | Metric |
| Boring Diameter Range | 2.1-4.2 Inches | 53.3-106.7 Millimeters |
| Boring Bar Length | 18 Inches (457.2 mm) 24 Inches (609.6 mm) 30 Inches (762.0 mm) 34 Inches (863.6 mm) |
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| Coupling Outer Diameter Range | 27-60 Inches (Maximum diameter can be extended by installing longer chains. For larger diameters, please contact a Mantsch representative) | 685.8-1524.0 Millimeters (Maximum diameter can be extended by installing longer chains. For larger diameters, please contact a Mantsch representative) |
| Axial Feed Rate - Mechanical Feed | 0-0.010 Inches/Rev 0-3.5 Inches/Min | 0-0.254 Millimeters/Rev 0-88.9 Millimeters/Min |
| Drive Unit Reduction Ratio | 1:1.15 | 1:1.15 |
| Boring Bar Output Torque (All configured with 5 HP Hydraulic Power Unit) - 2.2 Cubic Inch Hydraulic Motor | 19.5 Foot-Pounds | 26.4 Newton-Meters |
| Mounting System Adjustment Range - Lateral Fine Adjustment | +/-0.125 Inches | +/-3.175 Millimeters |
| Radial Fine Adjustment | Boring Bar Diameter | +/-12.7 Millimeters |
Bearing Span Requirements
The distance between the cutting position and the bearing must not exceed 5 times the boring bar diameter.
The recommended maximum bearing span to meet the specifications is as follows:
| Boring Bar Diameter | Imperial | Metric |
| 1-7/8 Inches | 19 Inches | 482.6 Millimeters |
Maximum Distance Between Rotary Drive Unit (RDU) and Bearing Bracket:
•24 Inches (609.6 mm) Support Beam: 18.4 Inches (467.4 mm)
•36 Inches (914.4 mm) Support Beam: 30.4 Inches (772.2 mm)
•48 Inches (1219.2 mm) Support Beam: 42.4 Inches (1077.0 mm)
The BB5500 mounts via the coupling's outer diameter. Due to the length limitations of the Rotary Drive Unit (RDU) and the bearing bracket, the distance from the coupling's outer diameter to the bolt circle diameter is limited and varies with the coupling diameter.
Example Bolt Circle Ranges
| Coupling Outer Diameter | Minimum Bolt Circle Diameter | Maximum Bolt Circle Diameter |
| 27 Inches (685.8 mm) | 18.2 Inches (462.3 mm) | 22.9 Inches (581.5 mm) |
| 44 Inches (1117.7 mm) | 36.3 Inches (922.0 mm) | 40.9 Inches (1038.9 mm) |
| 60 Inches (1524.0 mm) | 52.9 Inches (1343.7 mm) | 57.5 Inches (1460.5 mm) |
如需减小最小螺栓圆直径，可订购间隔块
Our AdvantagesMACTECH
Service Hotline+86-010-57536806
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Full-Chain Service Capability
Integrating full-chain services including advanced equipment supply, professional technical personnel deployment, and customized solution design to achieve one-stop satisfaction of user needs.
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Customized R&D Capability
Customized intelligent equipment can be tailored to meet users' specific needs, precisely matching application requirements across different scenarios.
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Strong Support System
Equipped with a professional technical service team and a comprehensive support team, providing users with timely and effective pre-sales consultation, in-sales guidance, and after-sales service.
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Strong Industry Reputation
Over the years, we have consistently upheld our commitment to quality, building a solid reputation and trust within the industry through reliable products and services.
