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S151The Powerfulfor large and complex workpieces.

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Advantages

S151 – Dimensions• Swing360mm(�4.�7”)• Grindingdiameter300mm(��.8”)• Grindingdepth�00mmforinternal(7.87”)/

�00mmforexternalgrinding(3.94”)• Spindlespeeds

–internalgrinding6000–60000min-�–externalgrinding6000min-�

• Workpieceweightincludingchuckmax.�50kg(330lbs)/�50kg(550lbs)

Hardware• Compactmachinefortheinternalandexter-

nalgrindingofawiderangeofworkpieces inonesetup• Exceptionallypreciseandefficientmachine• Speciallydevelopedforindividualcompo-

nentsandsmallseriesproduction• Turretwithtwoorfourgrindingspindels• Workheadonswiveltable–5/+30deg manual(Optional:B5-axis)

• Beneficialprice-performanceratiomeanslowerpartcosts

• Shortdeliverytimesthroughadvance productionandavailabilityofvariable components• Widerangeofaccessories

Software• ExtremelyeasyprogrammingwithStuder

Pictogramming• StuderGRINDprogrammingsoftwarefor

producinggrindinganddressingprogramsonaPC

• Standardizedinterfacesforloaderand peripheraldevices

S151

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With its very broad working range, this powerful, compactly designed machine permits internal and external grinding of workpieces up to 300 mm (11.8”) in diameter. The substantial accom-modation capacity of the sturdy workhead and the spindle turret with up to 4 grinding spindles open up a wide area of applications and are suit-able for complete machining in one setup.

This exceptionally precise and efficient machine has been specially developed for individual com-ponents and small series production operations. The beneficial price-performance ratio means lower part costs.

The unique, workshop-oriented Studer Picto-gramming software ensures reliable and ef-ficient programming of grinding and dressing

ThepowerfulCNCInternalCylindricalGrindingMachineforindividualandsmallseriesproduction.

cycles. Even the CNC newcomer will master sim-ple setup and resetting processes without any difficulty in the shortest possible time. And the possibilities are so great that even the grinding specialist will be astonished by the machine‘s performance.

The systematic development, production, assem-bly and testing of our products are carried out in a process-oriented manner, complying with the strict VDA 6.4 and ISO 9001 directives.

The Powerful for large and complex workpieces.

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1 | Turret-type spindle holder

2 | Single-spindle holder

3 | External grinding spindle

4 | Workhead

5/6 | Integrated ring sensor on workhead with wheel contact detection

7 | Large selection of chucks

Grindingspindleholder

The basic version of the S151 is fitted with a sin-gle grinding spindle holder, which can be fixed manually in one of the following three positions: + 6 deg, 0 deg, – 6 deg. This enables functional face grinding for contact and sealing surfaces. The large mounting bore permits the use of HF Internal grinding spindles of up to 170 mm (6.7”) in diameter.

As an option, an automatically swivelling grind-ing spindle turret head with Hirth serration can be fitted to the cross-slide unit to accommodate up to four HF grinding spindles. This means that even complex machining on internal and external diameters can be performed with high precision and with suitable machining parameters. And all this with minimal downtimes and high precision at the same time.

- Single-spindleorturret-typespindleholder

- Spindleholderboreuptodia.�70mm(6.7”)

- Completemachininginonesetup

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Workhead

The workhead is movable and is fitted to a swivel table that can be swivelled from – 5 deg to + 30 deg via a fine taper adjustment (Optional: B5-axis). This enables easy setting of the machine for the efficient production of internal and exter-nal tapers, also on long workpieces.

The rigidly designed workhead with preloaded precision ball bearings ensures the secure clamping of maximum loads of up to 300 Nm on

- Massiveconstruction

- Lowmaintenance

- Highroundnessvalues

the A6 spindle head interface fitted as standard in accordance with DIN55026 (Optional: A8 spin-dle head with 400 Nm).

The integrated ring sensor (optional) guarantees reliable wheel contact detection even with small diameters. Downtimes are reduced to a mini-mum and process safety enhanced. Adaptation to the different grinding wheels and materials is carried out via control parameters.

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Dressing

Fixed dressing tool holder plus fixtures to ac-commodate rotating dressing tools mean that the S151 can be adapted to the customer‘s re-quirements. Rotating dressing tools are particu-larly suitable for dressing ceramic-bonded CBN grinding wheels.

1 | Swivelling dressing attachment with dressing spindle

2 | Dressing turbine (rotating dressing unit)

3 | Cross-slide design with cross-slide

4 | Machine bed

- Fixeddresser

- Dressingturbine(rotatingdressingunit)

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Machinebase

The grey cast-iron, torsion-resistant machine base has very good damping properties. The mounting surfaces for the guiderails are ma-chined directly in the machine base.

Cross-slide

The rigidly ribbed cross-slide on the S151 pro-vides the ideal basis for universal operations. The transverse X axis and the longitudinal Z axis glide on high-precision, maintenance-free guid-erails and are driven by a three-phase servomo-tor drive via a ball screw with a direct coupling. The spindle nuts and the roller guideways are greased by means of a central greasing unit, which acts as a pulse greasing device. The high rigidity of the axis concept ensures slip-stick-free fine in-feed and optimum grinding results. A

linear absolute measuring system with a resolu-tion of 0.0001 mm (0.000,004”) provides for the highest possible positioning and repetition accu-racy, while the highly dynamic axes allow travel speeds of up to 25 000 mm/min (984 ipm).

- Compactdesignwithcross-slide

- highrigidity

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Machinecontrolandoperation

The S151 is equipped with the extremely reliable Fanuc 21i-TB, with optimized drive elements. The clearly and ergonomically arranged controls make setup and part changeover very easy for the user. The entire grinding and dressing pro-grams are created and corrected directly on the machine. Measurement offsets can be carried

out during the grinding process without modify-ing the workpiece program.

The portable control unit makes setup close to the grinding process child’s play.

- PCUmanualcontrolunit

- EMC-testedcontrolcabinet

- Ergonomicallyarrangedcontrols

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1 | Machine control with Sensitron air-gap bridging device

2 | Manual control unit

3 | Internal view of the control cabinet

4 | Pictogramming

5 | StuderGRIND modular programming software

Programming

The sophisticated mechanical engineering con-cept of the S151 is completed by a grinding soft-ware program developed in-house by Studer and continuously further optimized in collaboration with customers. This software offers:• Pictogramming: The operator strings the indi-

vidual grinding cycles together – the control unit generates the ISO code.

• Microfunctions: Free programming of grinding and dressing process sequences for optimiza-tion of the grinding process.

• StuderGRIND: Programming software for special applications such as form and thread grinding and profiling the grinding wheel for complex workpiece forms; the program is cre-ated on the PC and transferred directly to the machine control.

- Ergonomicallyarrangedcontrols

- Pictogramming

- StuderGRINDprogrammingsoftware

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Accessoriesandservices

There is an extensive range of accessory equip-ment available for all Studer cylindrical grind-ing machines, including centers, dressing tools, grinding wheels, clamping devices, internal grinding spindles, in-process gauging devices, etc.

The Studer Training Department organizes cours-es for hundreds of customers every year special-izing in programming and machine use – a sound basis for optimum use of your Studer machines.

Maintenance courses are tailored to the respec-tive requirements of the maintenance depart-ments. On request, they can also take place on the customer’s premises. Studer specialists col-laborate in grinding problems, in order to achieve the optimal solution

1 | Teleservice

2 | Deployment of engineers on the customer’s premises

3 | Operating worldwide

4 | Training on simulators

The after sales service is able to speak the user’s language and operates on a worldwide basis. This ensures that the service technicians do not have to travel far to make customer visits. The well thought-out service offer enables them to support the user to operate the machine in an optimal manner. And spare parts availability is guaranteed for a minimum of 10 years after in-stallation.

- Commissioning

- Training

- Productionsupport

- Warrantyextension

- HelpLine

- Maintenance

- Repair

- Teleservice

- Inspection

- Spareparts

- Overhaul

3463 mm80

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m14

72 m

m82

7 m

m

3150

mm

2550 mm

4018

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970

mm

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Main dimensions

Swing (with splash guard) 360 mm (530 mm) 14.2” (20.86”)

Grinding depth for internal grindingGrinding depth for external grinding

200 mm (7.85”)100 mm (3.93”)

Cross-slide: longitudinal axis

Max. travel 530 mm (20.8”)

Max. speed 25 000 mm/min (984 ipm)

Resolution 0,0001 mm (0.000,004”)

Transverse axis

Max. travel 360 mm (14.2”)

Max. speed 12 500 mm/min (492 ipm)

Resolution 0,0001 mm (0.000,004”)

Grinding spindle holder

Spindle diameter for HF spindles(diameter differences via reduction sleeves)

dia. 170 mmdia. 120 mm and 150 mm (4.7”, 5.9”)

Spindle speeds for internal grinding 6000 – 60 000 rpm

Spindle speeds for external grinding 6000 rpm

Optional: turret-type for 2 or 4 spindlesHirth serration with 3° graduation

Workhead

Speed range 1 – 800 min-1

Spindle head in accordance with DIN 55026 A6 (A8)

Spindle feedthrough 40 mm (1.56”)

Driving power 3 kW (4.1 hp)

Load during live grinding 300 Nm (400 Nm) 223 ft lbs (297 ft lbs)

Manual longitudinal adjustment 290 mm (11.41”)

Connected loads

Total connected load 45 kVA

Air pressure 5 – 10 bar

Extraction capacity for cooling lubricant mist– emulsion 1800 m3/h

Total weight 4000 kg (8800 lbs)

The information given is based on the technical levels of our machine at the time of this brochure going to print. We

reserve the right to further develop our machines technically and make design modifications. This means that the

dimensions, weights, colours, etc. of the machines supplied can differ. The diverse application possibilities of our

machines depend on the technical equipment specifically requested by our customers. The equipment specifically

agreed with the customer is therefore exclusively definitive for the equipping of the machines, and not any general

data, information or illustrations.

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Prin

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ISO 9001

VDA6.4certified

Fritz Studer AGCH-3602 ThunTelephone +41-33-439 11 11 · Telefax +41-33-439 11 12www.studer.com