GP-Rundschleifmaschinen
- Offer Profile
- GP-Rundschleifmaschinen GmbH is an owner-operated company. Experience, know-how, qualified employees and the dedication to set standards with expert innovation regarding construction and design is typical for GP. Within the framework of specialized solutions, we offer you the ideal cylindrical grinding machine specifically tailored to your spectrum of parts. Meanwhile, GP has a leading position in the production of universal, external and internal cylindrical grinding machines. We are quite fast when it comes to service, 100% precise in carrying out our work and very reliable.
Product Portfolio
Machines
CNC cylindrical grinding machines
Distance between centers 300 - 1600 mm Height between centers 180 - 300 mm Axes X / Z / C / B Workpiece headstock MK4 - MK6 Workpiece weight up to 250 kg Grinding discs Ø 400 - 750 mm Grinding headstock 5,5 - 30 kW Tailstock MK4 GP CNC cylindrical grinding machines constructed on the basis of a Karstens, Bahmüller or Schaudt
Distance between centers 300 - 1600 mm Height between centers 180 - 300 mm Axes X / Z / C / B Workpiece headstock MK4 - MK6 Workpiece weight up to 250 kg Grinding discs Ø 400 - 750 mm Grinding headstock 5,5 - 30 kW Tailstock MK4
Options- Internal grinding
- Surface grinding
- Automatic balancing
- In-process measuring systems
- Absolute measuring systems
- Tool entry detection
- Crash control
- Automated loading systems
- Special versions
Conventional cylindrical grinding machines
- Karstens universal cylindrical grinding machines are
designed for external, internal and surface grinding. They meet the high
requirements of users regarding precision and reliability. Retrofitting is
not much of an issue here; this is guaranteed by the special construction
characteristics.
- Infeed drive via DC motor Air-cushion supported quick adjustment of the grinding headstock – for rapidly and securely approaching the grinding position
- Separate drive for spindles for external and internal grinding
- Fully automatic work flows, infeed movement via multiple switch: Rapid forward travel, rapid return travel, grinding operation, infeed stop, mym infeed
- Automatic longitudinal grinding cycle
- Central lubricant supply for all grinding areas
- Workpiece headstock with steplessly variable drive with revolving spindle which can be fixed in position
- A broad spectrum of accessories to fulfill almost any grinding task
Retrofitting
- Retrofitting of cylindrical grinding machines
Machine refurbishment as an economic alternative
The signs of the time also do not leave most modern machine tools untouched. The result is decreasing productivity, machine downtimes, tolerance fluctuations or increasing energy consumption.
In addition to this, an increasingly longer lifecycle is expected from the machines.
Retrofitting, i.e. the refurbishment of cylindrical grinding machines, is efficiently combatting the signs of the time. This process results in machines which are as good as new. The complete mechanics (bearings, spindles and the complete geometry of the cylindrical grinding machine) is renewed or newly produced. The CNC control and drive area no longer corresponding to the state of the art is replaced by a new, economic solution, i.e. by a new control. Here, the term “efficiency” can be interpreted as achieving an unbeatable price-performance ratio with the same quality in comparison with new machines. This leads to a significant performance increase, a higher degree of efficiency and an assured spare part supply for the new components.
Not only the optics is an issue, the machine is refurbished from scratch.
The advantages of retrofitting:- Higher productivity and production security owing to less downtimes and idle times of the old machine. More rapid cycle times of the machining process
- Precision and high quality as well as simple operation and programming even without CNC programming skills
- Spare part supply assured in the long term
- Latest standards equal to new machines
- Customized solutions: replacement of controls/drives or mechanical modernization as a complete package, if required – full flexibility
- More or less a new machine is produced for the price of a good used machine – i.e. unbeatable when it comes to price-performance ratio
- Environmentally friendly – expensive disposal is no longer necessary
- User friendly – no need to get used to a new machine
Retrofitting Bahmüller cylindrical grinding machines
- GP retrofitting on Bahmüller cylindrical grinding
machines
With our GP retrofitting, all wear parts are always renewed. Exclusively wear-free elements, such as the machine bed and the cast parts, are reused which provides an enormous advantage regarding machine stiffness. Despite many years of use, after a GP retrofit the same quality known from new machines can be effortlessly achieved. Regarding machine and work safety, the latest technology adhering to current standards is used. Thus, a >>new<< machine is created fulfilling today’s requirements. Its most significant advantage is the unbeatable price-performance ratio in contrast to the purchase of a comparable new machine.
The retrofitting process
All assembly groups of the old cylindrical grinding machine, such as Z axis, X axis, the grinding headstock, the workpiece headstock and the tailstock are disassembled, completely dismantled and all wear parts renewed. The machine bed is sand-blasted and/or polished and repainted according to your color requirements. On the inside, the bed and the assemblies are protected with an oil-resistant gearbox paint coat. The guideways of the axes are re-ground according to factory standards. All V and face plates are re-scraped and measured to produce the basis for our µ-precise geometry. The machine is equipped with a new switchgear cabinet with new Siemens components. The old CNC control is replaced by a modern and efficient Siemens 840 D sl control with new axis drives and servo motors. A new, modern and ergonomic fully enclosed guarding section is attached to the machine. All V belts and all cables and switches are replaced by new ones. The geometry is completely readjusted and ground in.
The result: “As good as new.” Retrofitting Karstens cylindrical grinding machines
- GP retrofitting on Karstens cylindrical grinding
machines
The name Karstens is still synonymous with cylindrical grinding machines made in Germany with more than 9000 machines sold. Karstens cylindrical grinding machines can be found in any industry sector and are grinding precisely and reliably to this date. The cylindrical grinding machines are characterized by the high requirements of their users in terms of precision, reliability and stability. There exist different machine types such as external cylindrical grinding machines, internal cylindrical grinding machines and universal cylindrical grinding machines. These machines form the basis for our GP cylindrical grinding machines.
With our GP retrofitting, all wear parts are always renewed. Exclusively wear-free elements, such as the machine bed and the cast parts, are reused which provides an enormous advantage regarding machine stiffness. Despite many years of use, after a GP retrofit the same quality known from new machines can be effortlessly achieved. Regarding machine and work safety, the latest technology adhering to current standards is used. Thus, a >>new<< machine is created fulfilling today’s requirements.
Its most significant advantage is the unbeatable price-performance ratio in contrast to the purchase of a comparable new machine.
The retrofitting process
All assembly groups of the old cylindrical grinding machine, such as Z axis, X axis, the grinding headstock, the workpiece headstock and the tailstock are disassembled, completely dismantled and all wear parts renewed. The machine bed is sand-blasted and/or polished and repainted according to your color requirements. On the inside, the bed and the assemblies are protected with an oil-resistant gearbox paint coat. The guideways of the axes are re-ground according to factory standards. All V and face plates are re-scraped and measured to produce the basis for our µ-precise geometry.
The machine is equipped with a new switchgear cabinet with new Siemens components. The old CNC control is replaced by a modern and efficient Siemens 840 D sl control with new axis drives and servo motors. A new, modern and ergonomic fully enclosed guarding section is attached to the machine. All V belts and all cables and switches are replaced by new ones. The geometry is completely readjusted and ground in.
The result: “As good as new.” Controls & Service
Infeed control K11
- New digital Siemens infeed control for
Karstens K11
Completely compatible with old Karstens control. Only plug in the existing cables – ready to go! Digital display and entries via touchscreen.
Functions:- Grooving cycle
- Longitudinal grinding cycle
- Returning
Service
- So that everything always runs smoothly for you.
A standstill owing to an accident or a malfunction is not really pleasant and also ties up valuable capital if the machine is not able to produce. Therefore, we at GP make sure that we are at your premises within 48 hours – so that everything runs smoothly again quite soon. Most of the time, a machine fails just when you don’t really need this at all. Here we can step in as well.
Our GP service can be with you within 48 hours everywhere in Europe.
And without exaggeration, we can say that our specialists live and breathe cylindrical grinding machines. If it should be impossible for technical reasons to put your machine into operation again, we also have a solution ready in such instances. The broad service portfolio of GP-Rundschleifmaschinen will surely offer the right machine for you.
Adjusting the geometry
Over the years, the geometry of your cylindrical grinding machines will increasingly become imprecise. We measure all axes of your machine and readjust the geometry so that your cylindrical grinding machine will reach the highest levels of precision again.
Axis conversion from hydraulic axes to CNC-controlled ball screw
To reach the latest state of the art and exact preciseness with your current machine, we convert your old hydraulically driven axes to electrically driven axes with ball screw. New drives and new servo motors including all cables in connection with highly precise measuring systems are installed. Thanks to these improvements, your machine will be able to catch up effortlessly with the “new” ones on the market in terms of precision.
