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  • Offer Profile
  • Okamoto Machine Tool Works Ltd. Japan has been the world‘s leading manufacturer of high-quality grinding machines and equipment since 1926.

    The intense collaborations between Okamoto Machine Tool Works Ltd. Japan and Okamoto Machine Tool Europe GmbH guarantees the development
    and manufacture of innovative grinding machines with the very highest precision. In our actions, we aspire to respond positively to
    the market and make use of investments for future growth for the overall success of our company.

Product Portfolio
  • MACHINES

      • SURFACE GRINDING

          • ACC CA/CAiQ

          • Precision surface and profile grinding machine

            With a grinding length of 600 – 1000 mm and a cross travel of 400 – 600 mm the Okamoto ACC-CA/CAiQ is ideally suited for the toolroom. It features a high level of standard equipment to ensure easy handling, quick and precise small part production. The robust cast iron construction and double-V slideways in the table ensure long term precision. The intuitive operation of the controls simplifies usage and increases productivity considerably.

            • Surface and profile grinding machine
            • Choice of touch screen control or simple PLC controller
            • Moving column design
            • Magnetic chuck sizes from 600 x 400 to 1000 x 600 mm

            Additional equipment
            • Elektro-permanent magnetic chuck
            • Hydraulic overhead dresser with compensation
            • Coolant system with paper filter
          • ACC CA2/CA3

          • Precision surface grinding machine

            With a grinding length of 600 – 1000 mm and a cross travel of 400 – 600mm the Okamoto ACC-CA2/CA3 is ideally suited for the toolroom. It features a high level of standard equipment to ensure easy handling, quick and precise small part production. The robust cast iron construction and double-V table slideways (CA2) ensure long term precision. The intuitive operation of the controls simplifies usage and increases productivity considerably.

            • CNC surface & profile grinding machine
            • e.g. 3 axes simultaneously
            • Column feed for cross movement
            • Dialogue input system

            Additional equipment
            • Hydraulic oil temperature controller
            • Wheel flange
            • Balancing unit with arbour
            • Electromagnetic chuck
            • Coolant systems
          • ACC CHNC

          • Double column surface and profile grinding machine

            With a grinding length of 2000 – 4000 mm and a cross travel of 1050 – 2050 mm the Okamoto ACC-CHNC Series is ideally suited for both toolroom and production use. It features a high level of standard equipment to ensure easy handling, quick and precise
            part production. The robust cast iron construction and double-V table slideways together with gantry cross slide ensure long term precision. The intuitive operation of the controls simplifies usage and increases productivity considerably.

            • Double column machine
            • Robust construction for the very highest geometry requirements
            • Precision surface processing
            • Conversation software

            Additional equipment
            • Electro-(permanent) magnetic chuck
            • Paper band filter coolant system
            • Hydraulic overhead dresser with compensation
          • ACC CHIQ

          • Precision double column machine

            The ACC-CHiQ series meets the very highest requirements in terms of precision to be found in the manufacture for parts in tool and mould construction, in hot runner technology and punching die construction.
            The cross slideways can be adjusted mechanically and can be realigned at any time as needed. In doing so, the CNC does not need to be compensated which in turn affords advantages in a higher surface quality and smoothness.

            • Double column machine
            • PC control with touchscreen
            • Simple data input via symbols
            • Stable construction for the very highest geometry requirements
            • Mechanically adjustable cross slideways

            Additional equipment
            • Electro-permanent magnetic chuck
            • Paper band filter coolant system
            • Overhead dresser with compensation
            • Column increase 200mm
          • ACC GX

          • Precision surface grinding machine

            With a grinding length of 500 – 1000 mm and a cross travel of 200 –
            500 mm the Okamoto DX Series is ideally suited for the toolroom.
            It features a high level of standard equipment to ensure easy handling,
            quick and precise small part production. The robust cast iron
            construction and double-V slideways in both table and crossfeed
            ensure long term precision.

            • Hydraulic surface grinder with automatic feed
            • Moving saddle design
            • Double-V slideways longitudinal and cross
            • PLC controller with proven reliability

            Additional equipment
            • Electro-permanent magnetic chuck
            • Wheel head mounted Hydraulic dresser
            • Paper band filter with coolant system
            • Cross-feed digital readout
            • Spindle speed inverter
          • ACC SA

          • Precision surface grinding machine

            With a grinding length of 500 – 600 mm and a cross travel of 200 – 300 mm the Okamoto SA Series is ideally suited for the toolroom. It features a high level of standard equipment to ensure easy handling, quick and precise small part production. The robust cast iron construction and double-V slideways in both table and crossfeed ensure long term precision. The intuitive operation of the controls simplifies usage and increases productivity considerably.

            • Reinforced machine construction
            • Automatic grinding cycles
            • Double-V table and cross slideways
            • Table dresser option

            Additional equipment
            • Electro-(permanent) magnetic chuck 500 mm x 200 mm / 600 mm x 300 mm
            • Paper band filter coolant system
            • Temperature stabilized wheelhead
            • Fully automated balancing system
            • Wheel flange
          • ACC SA1

          • Next Generation

            Standard surface grinder series equipped with a newly developed user friendly controller.

            • Best step up from the ever popular Okamoto ACC-DX Series
            • Crossfeed setting by Teach-In
            • Compact footprint design
            • New control with LCD touch screen allows for easy monitoring of the machine functions and grind process
            • Auto dress with compensation is standard
            • Spindle inverter unit is standard
            • Auto-retract function is standard

            Additional equipment

            • Elektro-permanent magnetic chuck with chuck controller
            • Paper band filter coolant system
            • Temperature stabilized wheelhead
            • Wheel balancing systems
            • Wheel flange
          • ACC SAiQ

          • New model series of medium size surface grinding machines

            Better operability and repeatable accuracy are considered as the most important factor.

            increased functions

            • Electro permanent magnet 400 x 200 mm
            • Coolant system with paper filter
            • ISO software, profile creation software
            • Okamoto-I-CAM, CAD/CAM software
          • ACC 818 NC

          • Endless challenge to Zero

            Simply the best CNC profile grinding machine developed from our long experience in the grinding machine market. The advantages are manifold: Compact Moving Saddle Design, Fanuc CNC Control with dialogue software, 1/10 Micron AC Servo Motors, Fully Automatie Grind Cycle, automatie profile wheel dressing with Compensation, for the purpose of long lifetime and maintenance free operation, oil lubrication with automatic lubrication is applied to the guide and slide way, combination of both scraped V-V slide way and low friction Turcite assure accurate grinding for life, all castings exhibit high static and dynamic stiffness and excellent damping qualities.

            • Grinding wheel (2O5 x 13 x 31.75 mm)
            • Grinding wheel adaptor for wheels
            • Levelling screws and plates
            • Necessary Tools
            • Worklight

            Additional equipment
            • Coolant System
            • Grinding wheel balancer
            • Magnetic chuck
            • Spare wheel adaptor
          • ACC 450 AV

          • Precision surface and profile grinding machine

            To avoid effects of heat expansion and vibration, the hydraulic unit is isolated from the main unit.
            For the purpose of long lifetime and maintenance free operation, oil lubrication with automatic lubrication is applied to the guide and slide way. Combination of both scraped V-V slide way and low friction Turcite assure accurate grinding for life. All castings exhibit high static and dynamic stiffness and excellent damping qualities.

            • Surface and profile grinding machine
            • Choice of touch screen control or simple PLC controller

            Additional equipment
            • Dust Suction System
            • Coolant System
            • Grinding wheel balancer
            • Magnetic chuck
            • Overhead Dresser – Manual
            • Digital Readout for Crossfeed
            • Spare wheel adaptor
          • LINEAR 350 B

          • Manual precision surface grinding machine

            With a grinding length of 350 mm and a cross travel of 150 mm the Linear 350B is ideally suited for the toolroom. It features a high level of standard equipment to ensure easy handling and the manual control allows quick and precise small part production.

            • Machine base made of cast iron
            • Vibration -reducing construction
            • Table slideway with linear rollers

            Additional equipment
            • Electro-magnetic chuck
            • Balancing unit with arbour
            • Wheel flange
        • CYLINDRICAL GRINDING

            • UGM 5V

            • Precision vertical universal cylindrical grinding machine with B axis

              With the introduction of this new universal series of vertical and internal grinding machines, Okamoto combines its extensive know-how in the field of internal and external grinding in an entirely new design.

              • CNC universal vertical grinding machine
              • Pivoting wheel head (B axis)
              • Automatic Tool Changer for 4 wheels
              • Roundness 0.9 μm

              Additional equipment
              • 3-jaw chuck 500mm diameter manual
              • wheel mounts / holder with clamping cone BT40
              • coolant system with paper belt filter SBF 60
              • coolant system with magnet separator and temperature controller
            • OGM 250 UDXB

            • Universal cylindrical grinding machine

              A Universal cylindrical grinding machine having a diameter capacity of 200 mm and with 500 mm between centres, the OGM 250 UDXB is ideally suited for toolroom small batch production. it is delivered with a comprehensive level of standard equipment to suit toolroom production and allows quick and easy setup. The
              stable design of the spindle head together with double-V table slideways provides for a robust machine with long-term precision. The intuitive operation of the controls simplifies usage and increases productivity considerably.

              • Proven PLC type Okamoto DX control
              • With internal grinding unit in the standard equipment
              • AC motor ball screw table drive mounted on a T-shaped cast iron machine bed

              Additional equipment
              • Set of 6 Automatic driving dogs Φ5-80 mm capacity
              • Static Balancing unit with arbour
              • Table angle measuring system
              • Internal grinding unit
              • Self-centring chuck
              • Manual type 2- and 3-point steady rests
            • OGM 350 NCIII / UNCIII

            • Precision cylindrical grinding machine

              Standard software with 10-step grinding program. Software for profile grinding optionally available. Entry of grinding data via touchscreen. Wheel and work spindles driven by Fanuc AC servomotors. Shoulder locator and gap eliminator are
              included in the standard equipment.

              • External / universal cylindrical grinding machine
              • FANUC touchscreen control featuring easy to use software
              • Sizes from 500 mm to 1500 mm between centres

              Additional equipment
              • Self centring 3-jaw chuck with adaptor Ø 200 mm
              • Paper filter coolant system with 120 litre tank
              • Work light LED
            • UGM 360 NC

            • Precision cylindrical grinding machine with B-axis

              Standard software with 10-step grinding program. Software for profile grinding optionally available. Entry of grinding data via touchscreen. Wheel and work spindles driven by Fanuc AC servomotors. A swing down wheel dressing device for internal grinding is included in the standard equipment.

              • Double V table slideways
              • T-shaped machine bed
              • Temperature-stabilized spindles
              • Low-maintenance B-axis motor with direct drive
              • Directly powered ball screws

              Additional equipment
              • Motor-powered tailstock
              • Roll dresser
              • Gap Elimination
              • Programming software iCAM / EDELAC Win
            • IGM 15 NCIII/NCIII-2

            • Internal grinding machine with single or twin spindles

              Standard software with 10-step grinding program Software for plain bore, taper and contour grinding with 2-axis control. Entry of grinding data via touchscreen with easy to use software. Wheel and workhead spindles are driven by AC servomotors. High precision is further optimized via thermally stabilized infeed ball screw.

              • Internal cylindrical grinding machine for bore lengths up to 150 mm
              • FANUC touchscreen with easy to use software input
              • Single spindle or Twin spindle model with high frequence motor-driven spindles

              Additional equipment
              • 3-jaw chuck
              • Selection of internal spindles with quill
              • Coolant system with paper belt filter
              • Coolant system with magnetic separator and temperature controller
          • PROFILE GRINDING

              • UPZ NC II

              • NC-controlled surface & profile grinding machine

                With a grinding length of 400 – 500 mm and a cross travel of 200 – 250mm the Okamoto UPZ NCII Series is ideally suited for the toolroom. It features a high level of standard equipment to ensure easy handling, quick and precise small part production. The robust cast iron construction and double-V slideways in both table and crossfeed ensure long term precision. The intuitive operation of the controls simplifies usage and increases productivity considerably.

                • FANUC 0i control
                • „Teach-in process“
                • Scale-Feed-Back for the Z axis
                • Temperature-stabilized grinding spindle head

                Additional equipment

                • Electro-(permanent) magnetic chuck
                • Paper band filter coolant system
                • Precision static balancing unit
                • Diamond roll / disk dressing unit
                • Temperature stabilized wheelhead
              • UPZ 52Li

              • Ultra Precision surface and profile grinding machine

                This high speed grinding machine has a length capacity of 500 x 200mm width and is suitable for use in the toolroom or in a production environment. The stable design of the wheel head and slideways with linear guideways in both the table and cross slides guarantee the highest precision over a long time. The easy to use software in the machine control simplifies programming and increases production.

                • Table drive via linear motor
                • Workpiece measuring system
                • CCD-Camera
                • High speed reciprocation up to 500/min
                • Temperature stabilised wheelhead

                Additional equipment

                • Elektro-permanent magnetic chuck 500 mm x 200 mm
                • Paper band filter coolant system
                • Mist collector
                • 2-point rotary dresser
                • Measuring system incl. CCD camera and software
              • UPZ 210 Li/LiII

              • Ultra Precision surface and profile grinding machine

                With a machine weight of 5700 kg this machine offers the basis of a low vibration ultra precision profile grinding machine. High precision linear guideways and optional hydrostatic ways are paired with a linear motor drive for the table that allows a table oscillation speed of up to 250 reciprocations in each direction per minute. The machine is equipped with two independent wheel heads mounted on precision linear guideways positioned with linear motors. the twin wheel head can be utilised for roughing and finish grinding or for grinding both left and right sides of a profile in one operation. When combined with an optional CCD measuring camera, it is able to automatically measure and optionally compensate any eventual error to guarantee a perfect component in a single operation without operator intervention.

                • CNC Fast Resiprocation grinding machine with linear motor drives
                • Available in single spindle wheel head and double spindle wheel head variations
                • Carbide grinding with 520 oscillations per minute
                • Rough grinding, fine grinding, measuring, with automatic compensation in one loading

                Additional equipment

                • Coolant system
                • Mist collector
                • Temperature stabilization
                • Cleaning cycle during measurement
              • ACC 818 NC**

              • Endless challenge to Zero

                Simply the best CNC profile grinding machine developed from our long experience in the grinding machine market. The advantages are manifold: Compact Moving Saddle Design, Fanuc CNC Control with dialogue software, 1/10 Micron AC Servo Motors, Fully Automatie Grind Cycle, automatie profile wheel dressing with Compensation, for the purpose of long lifetime and maintenance free operation, oil lubrication with automatic lubrication is applied to the guide and slide way, combination of both scraped V-V slide way and low friction Turcite assure accurate grinding for life, all castings exhibit high static and dynamic stiffness and excellent damping qualities.

                • Grinding wheel (2O5 x 13 x 31.75 mm)
                • Grinding wheel adaptor for wheels
                • Levelling screws and plates
                • Necessary Tools
                • Worklight

                Additional equipment

                • Coolant System
                • Grinding wheel balancer
                • Magnetic chuck
                • Spare wheel adaptor
            • ROTARY TABLE GRINDING

                  • PRG DXNC

                  • Precision rotary table grinding machine

                    Horizontal spindle CNC rotary table grinding machine. This machine has a portal design, with moving column crossfeed. The table is in constant rotary motion, which adapts automatically to the changing grinding diameter. Furthermore, the table can be pivoted ± 3° for calibration.

                    • Rotary table grinding machine with horizontal spindle
                    • Variable table speed with constant cutting speed
                    • Portal design with cast iron construction
                    • FANUC control

                    Additional equipment
                    • Variable speed control for the grinding wheel
                    • Work light LED LED
                    • Oil mist extraction
                    • Coolant system with paper filter and magnet separator
              • DOUBLE COLUMN GRINDING

                    • ACC CHNC

                    • Double column surface and profile grinding machine

                      With a grinding length of 2000 – 4000 mm and a cross travel of 1050 – 2050 mm the
                      Okamoto ACC-CHNC Series is ideally suited for both toolroom and production use. It
                      features a high level of standard equipment to ensure easy handling, quick and precise
                      part production. The robust cast iron construction and double-V table slideways
                      together with gantry cross slide ensure long term precision. The intuitive operation
                      of the controls simplifies usage and increases productivity considerably.

                      • Double column machine
                      • Robust construction for the very highest geometry requirements
                      • Precision surface processing
                      • Conversation software
                      Additional equipment
                      • Electro-(permanent) magnetic chuck
                      • Paper band filter coolant system
                      • Hydraulic overhead dresser with compensation
                • LAPPING & POLISHING MACHINES

                      • AERO LAP

                      • Finishing system for polishing / lapping irregular profiles

                        For extremely fine lapping of irregular profiles, AERO LAP is also equipped for small tools and parts. The special suspension multicone enables an automated lapping process without changing the geometry of the components to be worked. Multicone is a special elastic carrier medium to which diamond powder has been added. The media is directed onto the workpiece via a nozzle from a special turbine. 

                        • Easy lapping of irregular profiles
                        • Improves tool life of all tools (drills, milling cutters, form punches, etc.)
                        • Suitable for PVD/CVD coating (pre/mirror-gloss lapping)
                        • Negligible production of dust and odour