Overview

This technical catalog from URMA Systems details a comprehensive range of precision reaming and boring tools, covering diameters from 0.2 mm to 2400 mm. It emphasizes modular tooling systems, digital measurement integration, and specialized components designed for high-precision machining applications.

1. Product Families and Modular Systems

The catalog is organized into key product families including Alpha-/Beta-Modul systems, DigiTec digital fine boring heads, MicroMax finishing tools, VersaMax roughing and finishing tools, IntraMax, MegaMax, SuperMegaMax systems, LBS-System, modular components, special tools, and software support.

Alpha-/Beta-Modul System

• Two main coupling types: MCC (axial threaded connection) for high stability and mass symmetry, and MCM (side lock system) for flexibility and higher torque transmission.
• Both MCC and MCM codes must match for proper assembly.

DigiTec Digital Fine Boring Heads

• Digital measurement technology integrated across fine boring heads (Ø 0.2 to 2400 mm).
• Features include a single handheld control unit, direct tool movement measurement, large digital display, metric/inch and diameter/radius switching, hybrid operation, and upgradeability from 2011 models onward.

MicroMax Finishing Tools

• Designed for finishing diameters 0.2 - 40 mm with Alpha and Beta versions.
• Adjustments down to 1 µm per diameter with DigiTec display; otherwise 10 µm.
• Carbide mini-boring bars and ISO-compatible insert holders with 7° or 11° clearance angles.
• Recommendation to use precision ground inserts for optimal fit and performance.

VersaMax Type 14 Roughing Tools

• Diameter range 19.5 to 153 mm with patented double cutter head design.
• Cutting forces directed into tool body for stability.
• Supports double cutter and offset roughing with individual radial adjustment.
• Uses ISO standard coolant-through inserts and 45° chamfer rings for edge preparation.

2. Technical Specifications and Parameters

• Diameter ranges span micro (0.2 mm) to large scale (2400 mm).
• Cutting depth formula: ap = (DA - Di) / 4, where DA is outer diameter and Di inner diameter.
• Feed rates and chip load optimized via insert holder design, including offset inserts for balanced chip load and double cutting depth at half feed rate.
• Balancing of fine boring heads reduces residual imbalance by up to 100 times, improving surface finish and tool life.

3. Insert Holders and Inserts

• Various holders for ISO inserts with 7° and 11° clearance angles, including combination and wiper insert holders.
• Wiper inserts enable doubling feed rates while maintaining or improving surface quality; require 95° insert holders.
• Insert holders available for roughing, finishing, offset roughing, and fine boring.

4. Roughing and Finishing Process (RFP)

• Simultaneous single-pass roughing and finishing using radial and axial offsets of boring heads.
• Applicable on IntraMax (Ø 49 - 297 mm), MegaMax (Ø 150 - 805 mm), and SuperMegaMax (Ø 500 - 2400 mm) systems.
• Benefits include reduced tooling costs, shorter machining times, high surface finish, and IT7 tolerance in one pass.
• Recommended roughing insert cutting depth approx. 2.5 mm for steel.

5. Modular Components and Adaptors

• Includes intermediate adaptors, diameter extenders (steel and aluminum), consoles, and tool holders.
• Adaptors comply with DIN 69871-A/D, MAS-BT, HSK63-A, and other international standards.
• Reducers available in Beta-Beta, Beta-Alpha, and Alpha-Beta configurations.
• Modular design allows flexible assembly and customization across diameter ranges.

6. Assembly, Adjustment, and Balancing Procedures

• Assembly involves loosening locking screws, aligning slots and keys, and tightening screws in sequence.
• Cutting edge orientation adjusted by setting correction angles and locking plugs accordingly.
• Balancing fine boring heads uses balance rings with scales for steel or carbide boring bars.
• Pre-setting boring diameters via micrometer screws or setting dials.
• Double cutter diameter setting includes individual blade adjustment and locking.

7. Tool Management Software

WinTool software integrates URMA catalog for tool management, ordering, and assembly configuration. It supports multiple languages and is freely downloadable.

8. Spare Parts and Maintenance

• Comprehensive spare parts listings for all systems, including clamping screws, inserts (cermet and carbide), reducers, boring bars, display units, and adaptors.
• Order numbers and specifications provided for easy identification and procurement.
• Maintenance supported by detailed parts catalog to ensure operational continuity.

9. Technical Standards and Compatibility

• Components conform to DIN 69871 (A/D and B), DIN 69893-A, ISO 26623 PSC, ISO DIN 2080, and other relevant standards.
• Coolant tubes and nozzles referenced but often not included; verify before ordering.
• Strong recommendation to bolt tools directly to spindle nose for enhanced stability, especially in large diameter systems.

10. Critical Recommendations and Best Practices

• Use balanced fine boring heads (e.g., A25) for higher RPM, improved surface finish, and reduced vibration.
• Employ Wiper inserts with 95° holders to maximize feed rates without compromising quality.
• Utilize DigiTec digital display units for precision adjustments down to 1 µm per diameter.
• Ensure correct insert holder and insert selection based on machining operation and diameter range.
• Follow coolant and lubrication specifications to optimize tool life and machining quality.
• Verify correct orientation of floating bolts and keyways during assembly.
• Use modular adaptors and extenders to accommodate varying workpiece diameters and machining setups.

Conclusion

The URMA catalog provides a detailed, modular, and technologically advanced portfolio of precision boring and reaming tools optimized for a wide diameter range. Integration of digital measurement technology and patented mechanical designs ensures high accuracy, reliability, and ease of use. Comprehensive spare parts and modular components support maintenance and adaptability, making the systems suitable for demanding precision machining applications.