Fine Boring

For Tight Tolerances and Defined Surface Finishes

Fine boring is the final machining step for producing bores with precise dimensional accuracy and geometric tolerances.
URMA fine boring heads deliver repeatable precision and consistent surface quality, covering diameters from 0.2 mm to very large bores.

Depending on the application, combine the appropriate fine boring head with suitable extensions and modular interfaces to achieve long tool overhangs while maintaining high process stability and flexibility in scaling your machining strategy.
The DigiTec system enables digital fine adjustments in increments of 0.001 mm on diameter, while analog adjustment is available in increments of 0.01 mm on diameter.

VersaMax Typ25

Diameter	18 mm – 153 mm
Method	Fine boring
Modular Interfaces	Alpha, Beta, Gamma
Machining Length	Application-dependent, with optional VAS interface
Fine Adjustment	0.010 mm/Ø (0.001 mm/Ø with DigiTec)
Coolant Supply	Internal coolant supply
Inserts	ISO-standard inserts; Wiper technology
Key Features	- Type A25 – balanceable fine boring heads, Ø 20–67 mm - High-performance fine boring heads for high-speed machining
Lead Time	Available from stock

IntraMax

Diameter	49 mm – 297 mm
Method	Two-edge roughing, staggered roughing, RFP, finishing, SHF
Modular Interfaces	Alpha, Beta, Gamma
Machining Length	Application-dependent, with optional VAS interface
Fine Adjustment	0.010 mm/Ø (0.001 mm/Ø with DigiTec)
Coolant Supply	Internal coolant supply
Inserts	ISO-standard inserts; optional Wiper technology
Key Features	- Ground serrations for high stability and precision - Large bore diameters on lower-power machines - Internal and external machining - Axial grooving (compatible with Horn technology)
Lead Time	Available from stock

MegaMax

Diameter	150 mm – 805 mm
Method	Two-edge roughing, staggered roughing, RFP, finishing, SHF
Modular Interfaces	Alpha, Beta
Machining Length	Application-dependent
Fine Adjustment	0.010 mm/Ø (0.001 mm/Ø with DigiTec)
Coolant Supply	Internal coolant supply
Inserts	ISO-standard inserts; Wiper technology
Key Features	- Lightweight diameter brackets - Ground serrations for high stability and precision - Roughing insert holders with various approach angles
Lead Time	Available upon request

Digitec

DigiTec is URMA’s digital fine adjustment system for fine boring heads ranging from 0.2 to 2,400 mm in diameter. The adjustment movement is measured directly and displayed on a large screen, enabling adjustment increments of 0.001 mm/Ø without reading errors, even in poor lighting conditions.
A single handheld device controls the entire DigiTec product family. With the battery and display integrated into the handheld unit, the system is virtually maintenance-free. It can be switched between mm and inches, as well as diameter and radius modes, and can also be used in hybrid mode with the conventional scale when needed.

URMA Test Center – Where Innovation Meets Precision

At the URMA Test Center, precision tools are developed and optimized under real-world conditions. Materials, machining strategies, and the latest technologies are extensively tested to ensure that URMA solutions meet the highest standards of efficiency, quality, and reliability.

Your benefits:

Customized test scenarios: Tailored to your specific requirements.
Practical analysis: Simulated manufacturing processes for optimal results.
On-site expertise: Direct collaboration with URMA experts to develop innovative solutions.

zur übersicht

Fine Boring

For Tight Tolerances and Defined Surface Finishes

Your Part – Our Challenge

VersaMax Typ25

MicroMax

IntraMax

MegaMax

SuperMegaMax

Digitec

URMA Test Center – Where Innovation Meets Precision

Do you have any questions?

Gianni Bara – Director Sales Tools

Diameter	0.2 mm – 40 mm
Modular Interfaces	Alpha, Beta, Gamma
Machining Length	Up to 8xD
Fine Adjustment	0.010 mm/Ø (0.001 mm/Ø with DigiTec)
Coolant Supply	Internal coolant supply
Insert	ISO-standard inserts
Key Features	- Up to 20,000 rpm with adjustable balancing - Easy adjustment without additional tools or a machine, thanks to the integrated balancing scale
Lead Time	Available from stock

Diameter	500 mm – 2'400 mm
Method	Two-edge roughing, staggered roughing, RFP, finishing, SHF
Machining Length	Application-dependent
Fine Adjustment	0.010 mm/Ø (0.001 mm/Ø with DigiTec)
Inserts	ISO-standard inserts; Wiper technology
Key Features	- Spindle-nose mounting recommended - Lightweight support arms - Ground serrations for high stability and precision
Lead Time	Available upon request

Search

Fine Boring

For Tight Tolerances and Defined Surface Finishes

Your Part – Our Challenge

VersaMax Typ25

MicroMax

IntraMax

MegaMax

SuperMegaMax

Digitec

URMA Test Center – Where Innovation Meets Precision

Do you have any questions?

Gianni Bara – Director Sales Tools