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CENTERLESS GRINDING MACHINE
High productivity and optimized changeover times, maximum stiffness, best vibration damping, thermal stability and low maintenance.
These are the defining features of Estarta, the most complete family of centerless grinders.
Every detail is important when handling wheels up to 25.6” (650 mm) wide, grinding workpieces up to 9.8” (250 mm) in diameter with up to 148 hp (110 kW) power:
- Oversized ball screws
- Twin-grip spindles
- Extra clamping in the regulating wheel head

The combination of a cantilever spindle for the grinding wheel and twin-grip for the regulating wheel gives you the best of both worlds.


Best dressing technology
- OptiDress
- Linear motors
- Simultaneous dressing of both wheels possible
Best productivity
Stiff and stable machine with wheel widths up to 25.6” (650 mm) and reduced dressing times. Designed to optimize productivity.
Best process stability
Natural granite bed for the best vibration damping, stiffness and thermal stability, oversized ball screws… All designed to guarantee the best accuracy, with minimum maintenance over the life of the machine.
Optimized machine design for best set-up and operating access
- Fixed work center, making it easy to integrate peripherical equipment
- Easy-to-use DoGrind+ HMI
- Minimized tooling needs inside the machine
- Improved ergonomic access
Close to 100% availability: Almost no maintenance needed
ESTARTA has up to 32% fewer components than other machines in the market, using only electric and pneumatic actuators, reducing gear boxes and transmissions.
The need for maintenance is virtually eliminated and the environmental footprint is very small.
We can offer you a machine including (un)loading systems, feeding or storage systems, and auxiliary stations.
Estarta-650 | Estarta-400 | Estarta-250 | Estarta-175 | ||
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Max. workpiece diameter | mm | 250 | 150 | 150 | 40 |
Grinding wheel diameter (OD x width x ID) | mm | Ø650 x 650 x Ø304.8 | Ø650 x 400 x Ø304.8 | Ø650 x 250 x Ø304.8 | Ø508 x 175 x Ø304.8 |
Max. grinding wheel peripheral speed | m/s | 120 | 120 | 120 | 120 |
Regulating wheel diameter (OD x width x ID) | mm | Ø400 x 650 x Ø203.2 | Ø400 x 400 x Ø203.2 | Ø400 x 250 x Ø203.2 | Ø305 x 175 x Ø127 |
Main motor | kW | 55-110 | 37-90 | 22-37 | 11-22 |
Net weight | kg | 16500 | 12500 | 12000 | 8000 |
Estarta-650 | Estarta-400 | Estarta-250 | Estarta-175 | ||
---|---|---|---|---|---|
Max. workpiece diameter | in | 9.8 | 5.9 | 5.90 | 1.6 |
Grinding wheel diameter (OD x width x ID) | in | Ø25.6 x 25.6 x Ø12 | Ø25.6 x 15.75 x Ø12 | Ø26 x 9.8 x Ø12 | Ø20 x 6.9 x Ø12 |
Max. grinding wheel peripheral speed | sfpm | 23620 | 23620 | 23620 | 23620 |
Regulating wheel diameter (OD x width x ID) | in | Ø15.74 x 25.59 x Ø8 | Ø15.74 x 15.74 x Ø8 | Ø16 x 9.84 x Ø8 | Ø12 x 6.88 x Ø5 |
Main motor | hp | 73.75-147.51 | 49.61-120.69 | 29.5-49.6 | 14.75-29.5 |
Net weight | lb | 36370 | 27550 | 26450 | 17630 |
Cross spider
Drill
Taps
Steering rack
Punch
Inner & outer ring
Roller
Piston for radial & axial motors
Spool valve
EV motor shaft
EV motor shaft e-bike
EV reducer shaft
Electric turbo shaft
Assisted electric braking system
Connecting rod bolts
Diesel injection
Electric motor shaft
Fastener
Piston rod
Needle
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We have a 24-hour shipment program to exchange your damaged or worn spindle for one we have in stock to eliminate downtime
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Remote machine diagnosis: Keep your machine connected and analyze the vibration threshold of your machine spindles

