Blohm PROFIMAT MT 612

$700,000 - $1,100,000 Updated 2026-03-17

Key Specifications

table working area

600 × 1,200 mm (23.6 × 47.2 in)

max workpiece weight

1,200 kg (2,646 lb)

longitudinal travel x

1,400 mm (55.1 in)

cross travel y

700 mm (27.6 in)

vertical travel z

600 mm (23.6 in)

grinding spindle power

37 kW (49.6 HP)

Overview

The Blohm PROFIMAT MT 612 is a large-format CNC surface and profile grinding machine in Blohm's PROFIMAT MT (Multi-Technology) series, offering a 600 mm × 1,200 mm magnetic chuck working area and the capacity to handle heavy workpieces up to 1,200 kg. The PROFIMAT MT series represents Blohm's high-production surface and profile grinding platform, combining pendulum surface grinding capability with deep creep-feed profile grinding in a single machine architecture — the "MT" designation signifying the multi-technology approach that allows operators to program both grinding strategies within the same job without machine reconfiguration.

The PROFIMAT MT 612 is designed for industries where large, heavy workpieces must be ground to precise profile geometries: aerospace structural components, turbine engine casings, die and mold inserts, machine tool components, and large automotive stamping dies. The 600 × 1,200 mm table provides working area substantially larger than the standard 408 format (400 × 800 mm), enabling single-pass grinding of large workpieces that would require multiple setups on smaller machines. The heavy workpiece capacity of 1,200 kg allows the machine to handle large steel and superalloy castings and forgings without requiring specialized material handling.

The grinding spindle provides up to 37 kW of power with peripheral wheel speeds to 80 m/s, supporting both conventional abrasive wheels for steel and cast iron grinding and CBN/superabrasive wheels for hardened steel, aerospace alloys, and carbide grinding. The PROFIMAT MT 612 features CNC-controlled dressing with diamond form rolls for maintaining complex profiles across production runs — the dressing system allows profiles to be automatically reconditioned between workpieces or within cycles, maintaining geometric accuracy without operator dressing intervention.

Control is via the Siemens 840D sl platform with Blohm's grinding-specific OP 15 interface, which provides workpiece programming, dressing cycle management, thermal compensation, and production data logging. The machine can be equipped with Blohm's automatic wheel changer and robot loading interfaces for unattended production. Pricing for the PROFIMAT MT 612 typically falls in the $700,000–$1,100,000 range depending on configuration and automation level — competitive with the Mitsui Seiki MSG-612 and Okuma GP-47M in the large-format surface grinding segment.

Full Specifications

Parameter	Value
Table Working Area	600 × 1,200 mm (23.6 × 47.2 in)
Max Workpiece Weight	1,200 kg (2,646 lb)
Longitudinal Travel X	1,400 mm (55.1 in)
Cross Travel Y	700 mm (27.6 in)
Vertical Travel Z	600 mm (23.6 in)
Grinding Spindle Power	37 kW (49.6 HP)
Max Wheel Peripheral Speed	80 m/s
Max Grinding Wheel Diameter	500 mm (19.7 in)
Max Grinding Wheel Width	100 mm (3.9 in)
Rapid Traverse Longitudinal	30,000 mm/min (1,181 ipm)
Grinding Modes	Pendulum surface grinding + creep-feed profile grinding
Cnc Dressing	Diamond form roll CNC dressing (automatic in-cycle)
Machine Base	Polymer concrete (Granitan-type)
CNC Control	Siemens 840D sl with Blohm OP 15 interface

Specifications sourced from blohm-machines.com — verified 2026-03-28

Strengths & Limitations

Strengths

600 × 1,200 mm working area handles large aerospace structural components, die blocks, and turbine casings in a single setup that would require multiple setups on smaller format machines
Multi-technology pendulum + creep-feed capability in one machine eliminates the need for separate surface and profile grinders for shops processing both flat surfaces and complex profiles
37 kW spindle with 80 m/s peripheral speed supports CBN creep-feed grinding of aerospace superalloys and hardened tool steels at high material removal rates
Automatic CNC diamond roll dressing maintains complex profiles in-cycle without operator intervention — critical for long production runs where wheel wear must be continuously compensated
Heavy 1,200 kg workpiece capacity allows direct loading of large die blocks, turbine casings, and aerospace forgings without special considerations for table load limits

Limitations

At $700,000–$1,100,000, the PROFIMAT MT 612 is a major capital investment — only justified for operations with consistent volumes of large-format surface and profile grinding work
The machine's large footprint and weight (requiring reinforced concrete foundations) make installation more complex than smaller grinders and limit flexibility in shop floor layout changes
Complex setups on large and heavy workpieces require experienced grinders who understand thermal effects on large workpieces — straightness and flatness errors from workpiece heat buildup are more difficult to manage on large parts

Best For

Aerospace tier 1 and tier 2 suppliers grinding large structural components, turbine engine casings, and compressor housings where the 600 × 1,200 mm table provides the working area needed Die and mold manufacturers grinding large injection mold cavities, stamping die inserts, and precision forming tools where the profile grinding capability maintains complex contour geometries Machine tool builders producing precision machine beds, guideways, and table surfaces where flatness and parallelism tolerances require a heavy-duty surface grinder with full CNC control Contract grinding shops that differentiate by handling the large workpieces that most competitors' smaller machines cannot accommodate

Frequently Asked Questions

01 What is the difference between the PROFIMAT MT 408 and MT 612?

The PROFIMAT MT 408 has a 400 × 800 mm working area and typically handles workpieces up to 600–800 kg. The MT 612 doubles the table area to 600 × 1,200 mm and increases the workpiece capacity to 1,200 kg. Both machines share the same multi-technology (pendulum + creep-feed) architecture and Siemens 840D sl control. The MT 612 is specified when workpiece size or production volume exceeds what the 408 format can handle in a single setup.

02 Can the PROFIMAT MT 612 perform creep-feed grinding?

Yes. The MT designation indicates the machine is configured for both pendulum surface grinding (high traverse speed, small depth of cut) and creep-feed grinding (very slow traverse, large depth of cut, up to full-depth profile generation in a single pass). Creep-feed mode is engaged through the CNC program and requires adequate spindle power (37 kW on the MT 612), appropriate wheel grade, and high-volume coolant delivery. The machine's polymer concrete base provides the rigidity needed for deep creep-feed cuts.

03 What foundation requirements does the PROFIMAT MT 612 need?

Large surface grinders like the MT 612 require a reinforced concrete foundation typically 400–600 mm thick, isolated from shop floor vibration where possible. The machine weight (approximately 20,000–25,000 kg depending on configuration) requires the floor load capacity and foundation design to be verified by a structural engineer before installation. Blohm provides foundation drawings and load specifications as part of the installation package.

04 What wheel specifications are used on the PROFIMAT MT 612?

The MT 612 accommodates grinding wheels up to 500 mm diameter × 100 mm wide. For surface grinding of hardened steel and cast iron, vitrified aluminum oxide or silicon carbide wheels are standard. For creep-feed grinding of aerospace superalloys (Inconel, titanium), vitrified CBN or conventional wheels with appropriate bond and grade are specified based on material and MRR requirements. For profile grinding that requires high form holding, harder-grade vitrified wheels with CNC dressing maintain profile accuracy over longer dressing intervals.

05 Can automation be added to the PROFIMAT MT 612?

Yes. Blohm and United Grinding offer automation packages including robot loading/unloading, automatic wheel changers (multiple wheel stations for different operations), and pallet-based workholding with System 3R or EROWA zero-point systems. The Siemens 840D sl control provides the PROFINET I/O and program management infrastructure for cell integration. For very large workpieces, overhead crane-assisted loading with safety interlocks is also a standard option.