United Grinding (Blohm) CNC Grinding Machines

Blohm Profimat MC 608

$400,000 - $650,000 Updated 2026-03-16

Key Specifications

Spindle Power

37 kW (49.6 hp)

clamping area

600 x 400 mm (23.6 x 15.7 in)

table traverse x

750 mm (29.5 in)

crossfeed y

420 mm (16.5 in)

vertical z

500 mm (19.7 in)

wheel dressing

CNC diamond roller dresser (profile)

Overview

The Blohm Profimat MC 608 is a CNC profile grinding machine — an advanced surface grinding system with CNC wheel dressing capability that enables the grinding of complex cross-sectional profiles in a single pass. Where the Planomat series grinds flat surfaces, the Profimat MC uses a CNC-dressed grinding wheel to produce complex 2D profiles in one pass across the workpiece face, eliminating the multiple setups required to produce these profiles with conventional machining or grinding.

The MC 608 provides a 600 x 400 mm (23.6 x 15.7 in) clamping area with X/Y/Z CNC axes plus a CNC diamond roller dresser that shapes the grinding wheel to the desired cross-sectional profile. The dressed wheel then grinds the profile into the workpiece — turbine blade roots (fir-tree profiles), form tools, gear rack profiles, punch profiles, and aerospace structural sections — with accuracy and surface finish that conventional machining cannot achieve in hardened material.

Blohm's Profimat is the benchmark machine in the precision profile grinding segment, used extensively in aerospace turbine manufacturing for grinding high-nickel alloy turbine blade root forms to ±0.003 mm profile accuracy. The machine handles difficult-to-machine materials including Inconel, Waspaloy, René alloys, and titanium at grinding parameters that produce acceptable residual stress profiles and surface integrity in these critical aerospace components.

At $400,000-$650,000 new depending on wheel dressing configuration and axis options, the Profimat MC 608 is a specialized investment for aerospace turbine manufacturers, precision tool manufacturers producing form tools and gauges, and any operation requiring accurate complex 2D cross-sectional profiles in hardened or difficult-to-machine materials.

Full Specifications

Parameter	Value
Clamping Area	600 x 400 mm (23.6 x 15.7 in)
Table Traverse X	750 mm (29.5 in)
Crossfeed Y	420 mm (16.5 in)
Vertical Z	500 mm (19.7 in)
Wheel Dressing	CNC diamond roller dresser (profile)
Max Wheel Speed	63 m/s (12,400 fpm)
Wheel Diameter	400 mm (15.7 in) maximum
Spindle Motor Power	37 kW (49.6 hp)
Profile Accuracy	±0.003 mm (±0.00012 in)
CNC Control	Fanuc with C.O.R.E. platform
Machine Weight	~9,000 kg (19,842 lb)
From	To
Newark New York	Las Vegas (LAS)
San Francisco	Newark/New York (EWR)
Los Angeles	Newark/New York (EWR)

Strengths & Limitations

Strengths

CNC diamond roller dresser enables complex 2D profile grinding in a single pass — impossible with flat surface grinding
±0.003 mm profile accuracy enables turbine blade root forms, gear rack profiles, and precision form tool geometries
37 kW spindle at 63 m/s wheel speed provides aggressive stock removal in Inconel, titanium, and hardened tool steel
400 mm maximum wheel diameter provides large wheel contact area for efficient material removal in profile grinding
Blohm's Profimat is the global standard in aerospace turbine blade root grinding — proven on Inconel, Waspaloy, René alloys
C.O.R.E. platform for shops operating multiple United Grinding machines

Limitations

$400K-$650K investment requires specialized profile grinding workload — not appropriate as a flat surface grinder
CNC diamond roller dresser adds significant programming and setup complexity versus flat surface grinding
37 kW spindle and 63 m/s wheel speed require significant electrical service capacity
9,000 kg machine weight requires substantial foundation preparation
Profimat applications require experienced profile grinding engineers — not a machine for general surface grinding operators

Best For

Aerospace turbine manufacturers grinding nickel alloy turbine blade fir-tree root forms to precise profile tolerance Precision form tool manufacturers producing complex profile gauges, form punches, and broach tools in HSS and carbide Gear and rack manufacturers requiring precise involute and rack profiles in hardened steel Defense and energy turbine manufacturers grinding compressor blade and disk profiles in titanium and nickel alloys Precision toolrooms producing complex cross-sectional profiles in hardened material where other processes cannot achieve required accuracy

Frequently Asked Questions

01 What is profile grinding and why is it needed?

Profile grinding uses a grinding wheel dressed to a specific cross-sectional shape (the profile) that is then ground into the workpiece face in a single pass. This produces complex 2D shapes — like turbine blade root fir-tree profiles, gear tooth involutes, and dovetail slots — in hardened materials with accuracy and surface integrity that milling, EDM, or flat grinding cannot match. Profile grinding is the required process for hardened aerospace turbine components where dimensional accuracy, surface finish, and residual stress all affect part life.

02 What is a CNC diamond roller dresser?

The CNC diamond roller dresser is a precision diamond-coated roller that rolls against the grinding wheel face under CNC control to form the desired profile shape into the wheel. The roller is pre-formed to the negative of the desired grinding profile. As the roller presses against the wheel, it removes grinding grain from the wheel surface to create the profile. CNC control of the roller path enables complex curved profiles with high accuracy.

03 Can the Profimat MC 608 grind Inconel turbine blades?

Yes. The Profimat MC 608 is specifically designed for creep-feed profile grinding of nickel superalloys including Inconel 718, Waspaloy, René 80, and similar aerospace turbine alloys. The 37 kW spindle and CBN grinding wheel capability provide the material removal rates and wheel life required for efficient turbine blade root grinding. Coolant delivery (high-pressure, high-volume) is critical for thermal management in nickel alloy grinding.

04 How does the Profimat compare to a conventional surface grinder for form grinding?

A conventional surface grinder with a form wheel can produce simple profiles but lacks the CNC dressing accuracy and grinding control of the Profimat. For simple forms (radius, chamfer), a form wheel on a surface grinder is adequate and much less expensive. For complex profiles like turbine blade fir-trees with 5-7 lobe geometries and ±0.003 mm tolerance, the Profimat is the appropriate machine — the alternative is slower, less consistent, and requires more operator skill.