Center Grinding Machine

5-125 mm︱ 50-1000 mm︱ 1000 mm︱ 1.9 KVA︱ 630 kg︱ 100 kg︱

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workpiece diameter 110 mm︱grinding depth 60 mm︱clamping length 2500 mm︱total power requirement kW︱weight of the machine ca. t︱dimensions of the machine ca. m︱

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workpiece diameter 100 mm︱grinding depth 50 mm︱clamping length 1000 mm︱total power requirement 0,5 kW︱weight of the machine ca. 0,4 t︱dimensions of the machine ca. m︱

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workpiece diameter 8-125 mm︱grinding depth 130 mm︱clamping length 50-1100 mm︱max. workpiece diameter 0 mm︱min. workpiece diameter 0 mm︱workpiece length mm︱total power requirement 1 kW︱weight of the machine ca. 500 kg︱dimensions of the machine ca. m︱

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T E C H N I C A (Switzerland) Centre Hole Grinding Machine Model ZSM 1000 Year approx. 1975 Serial No. J 1400 _______________________________________________________ Distance between centres 50 – 1,100 mm Height of centres 145 mm Workpiece Ø 8 – 125 mm Max. centre hole taper Ø 2 – 50 mm Max. centre hole taper angle 60 ° Clamping range of vice 4 – 150 mm Stroke of grinding head 130 mm Stroke of grinding tool on workpiece 0.75 – 5 mm Grinding tool Ø 15 – 60 mm Grinding spindle speeds 13,000 – 45,000 rpm Workpiece drive 0 rpm Total electrical load, approx. 0.5 kW - 380 V - 50 Hz Weight, approx. 500 kg Accessories / Special Features: * A cone shaped grinding wheel is employed, but it is only in line contact with the centrehole surface, in addition it is reciprocating simultaneously along this line. * The workpiece remains stationary, enabling the procuction of perfect centre holes. * To clamp cylindrical Workpieces one uses a height adjustable 2 jaw chuck which gives three point contact and always coincides with the center of the grinding spindle. * Height-adjustable workpiece centering tool with carbide inserts. Manual adjustment of appropriate workpiece diameter with a rachet coupling. * Manual dressing device, mounted on the side of the grinding spindle, stroke approx. 40 mm, for producing a geometrically exact conical form. * Pre-centering device for Workpiece only partially available. * Height-adjustable tailstock and bore in machine base allow longer workpieces. Condition : average to good/should be reconditioned. Machine can be inspected under power. Delivery : Ex stock, as inspected Payment : Net, after conclusion of contract

workpiece diameter 125 mm︱grinding depth 50 mm︱clamping length 2000 mm︱total power requirement 0,5 kW︱weight of the machine ca. 1000 kg︱dimensions of the machine ca. m︱

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T E C H N I C A (Switzerland) Centre Hole Grinding Machine Model ZSM 5100 – 2.000 Year approx.. 1975 S/N 66 32 7872 – J 3278 _______________________________________________________ Distance between centres 50 – 2.000 mm Height of centres approx. 125 mm Workpiece Ø in clamping Vice 8 – 125 mm Swing of workpiece over tailstockguide 290 mm Swing of Workpiece max. over grinding head pillar 300 mm Max.weight of workpiece 250 kg Max. centre hole taper Ø 2 – 50 mm Max. centre hole taper angle 60 ° Clamping range of vice approx. 5 – 160 mm Grinding head adjustable in vertical axis 160 mm Stroke of grinding tool on workpiece 0.75 – 5 mm Grinding tool Ø 15 – 60 mm Grinding spindle speeds 13,000 – 45,000 rpm Total electrical load, approx. 1 kW - 380 V - 50 Hz Weight, approx. 1.000 kg Accessories / Special Features Machine is suitable for workpiece length up to 2.000 mm with a basement extension * A cone shaped grinding wheel is employed, but it is only in line contact with the centrehole surface, in addition it is reciprocating simultaneously along this line. The workpiece remains stationary, enabling the generation of perfect centre holes. * To clamp cylindrical Workpieces one uses a height adjustable 2 jaw vice which gives three point contact and always coincides with the center of the grinding spindle. * Height-adjustable workpiece centering vice with carbide inserts. Manual adjustment of appropriate workpiece diameter with clamping screw. * Dressing device, mounted on the side of the grinding spindle, stroke approx. 40 mm, for producing a geometrically exact conical form and with oscillation of diamond tool. * Pre-centering device for Workpiece adjustment between centers. * Pneumatic Oil Lubrification of grinding spindle by oil-mist. * Manually adjustable Tailstock with handwheel but without motorized drive. Condition : Good to very good. Machine can be inspected under power. Delivery : Ex stock, as inspected Payment : Net, after conclusion of contract

workpiece diameter 2 - 60 mm︱clamping range 4 - 220 mm︱workpiece length 50 - 1.100 mm︱workpiece weight max. 120 kg︱Angle 60 Grad︱grinding wheel speeds max. 45.000 U/min︱total power requirement - kW︱weight of the machine ca. 0,7 t︱dimensions of the machine ca. 1,0 x 1,0 x 2,0 m︱Documents ︱

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Center Grinding Machine TECHNICA - ZSM 150

workpiece diameter 60 mm︱grinding depth 30 mm︱clamping length 1000 mm︱total power requirement kW︱weight of the machine ca. 0,6 t︱dimensions of the machine ca. 0,5 x 0,5 x 2,1 m︱

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center hole 2-50 mm︱workpiece diameter 8-125 mm︱workpiece length - min. 50 mm︱workpiece length - max. 1000 mm︱column - center height 145 mm︱grinding wheel speeds: ︱number 3 ︱from/to 13000-45000 U/min︱spindle turning speed range 400 U/min︱dimensions of the machine ca. 750x850x1800 mm︱weight of the machine ca. 475 kg︱

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workpiece diameter 30 - 325 mm︱grinding depth 60 mm︱clamping length 1000 mm︱center hole 1 - 30 mm︱total power requirement kW︱weight of the machine ca. 0,2 t︱dimensions of the machine ca. 0,5 x 0,5 x 1,7 m︱

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workpiece diameter 150 mm︱grinding depth 5,0 mm︱workpiece length 1.100 mm︱grinding spindle speed 45.000 U/min︱voltage 380 V︱total power requirement 0,5 kW︱weight of the machine ca. 490 kg︱dimensions of the machine ca. 1,00 x 0,85 x 1,85 m︱suction device 0,40 x 0,75 x 0,60 m︱

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- Serial-No.: J20720-89 - Machine ON: 3.680 h - Workpiece drive - Dressing device - Suction

internal diameter 100 mm︱grinding depth 160 mm︱swing diameter 300/450 mm︱centre height 290 mm︱max. outer diameter 300/450 mm︱work piece spindle speed 50-360/90-700 U/min︱weight of the machine ca. 2900 kg︱Machine size (LxWxH) 2500x1750x1800 mm︱swiveling workpiece drive ︱face grinding attachement mit Schleifscheibe ︱internal grinding extractor ︱internal grinding spindle DKF Typ SLA 60x400 mit 20 ︱grinding wheel dresser auf Tisch ︱ ︱3 jaw chuck Ø 200 mm︱grinding wheel cover ︱ ︱hydraulic unit ︱coolant system with magnet grate und Wassertank ︱frequency converter f. stufenlose Spindeldreh ︱

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100 % before loading warranty: none one used internal grinding machine, make: Jotes, type: SOJ 10M, year of produktion 1986

internal diameter 300 mm︱grinding depth mm︱swing diameter 300/350 mm︱workpiece length - max. 2300 mm︱table rotating -2/+6 °︱table speeds 0-4000 mm/min︱max. workpiece weight 400 (fliegend, 150mm von kg︱workhead - center taper 6 MK︱Rotation speed of workhead 0 - 400 1/min︱workhead motor 4 kw︱3-jaw chuck 250 (selbstschließend) mm︱grinding motor 11 kW︱coolant pump 2,2 kW︱CNC controller Siemens 840 D oder SPS vo ︱servo motors ︱autom. sensing device for grinding wheel Option ︱ ︱linear scales and ballscrew in allen Achsen ︱grinding wheel dresser ︱ ︱

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PERFORMANCE AND PRECISION DEGREE Robbi grinding machines are according to the international precision normes ISO 2433. The table movement linearity is guaranteed by a max. deviation of 0,002 mm/mt. The obtainable grinding roundness is : 0,4m (**) (**) for a test workpiece ground in our factory during machine testing The CNC controls : Wheel head movement (AXIS X) Longitudinal table movement (AXIS Z) Work head spindle rotation speed The available programs permit the programming of the following grinding cycles Plunge Cylindrical pass Cylindrical pass with interpolation between table and wheel movement to grind taper workpieces Radius The software for the workpiece grinding operation is very simple and intuitive. To facilitate the programming the software is equipped with an exemplifying graphics, to input the data for each parameter. The software, has been specially studied, so as to permit also non specialised operators to programme without any problems complex workpieces. When the workpiece grinding programme has been completed the CNC will automatically make up a summary list, where only the geometric parameters are evidenced. This list permits with a glance to verify the complete programme; this operation is very helpful to verify eventual input data errors or to check rapidly a workpiece programme when reloaded from the file. While the programme is in execution, it is possible to intervene and modify in real time the technologic parameters, such as: increments, dwell inversion times, sparkout passes. Also, it is possible to intervene with the jog handwheel. The Grinding Machine is composed of : BASE Structure in normalised and stabilised cast iron with large ground guides. The lubrication plant supplies a constant oil flow distributed over the complete length of the guides. In the middle of the base, there is positioned the ball screw for the table longitudinal movement. On all the lower part of the perimeter are situated the recesses for machine levelling. Considering the base structure, usually a foundation is not required. TABLE The table is manufactured in two parts, both are in normalised and stabilised cast iron. The lower part is composed of wide guides which are ground and accurately hand scrapped, for a better sliding. The upper part, is swivelable in the two directions, suitable for grinding tapered workpieces. It includes a micrometric device with centesimal dial gauge for taper control. WORKHEAD The structure in normalised, stabilised and well ribbed cast iron, allows to support the workpiece weight and the force generated by the grinding operation. The spindle rotates on high precision ball bearings, guaranteeing restricted tolerance and maximum rigidity in the working. The spindle rotation is by means of a three phase motor with variable speed controlled by an inverter. INTERNAL GRINDING SPINDLE CARRIAGE The structure is composed of a carriage, where the internal grinding spindle is located. The working feed, is obtained by a re-circulating ball screw and preloaded nut. The screw movement is assured by a brushless motor. The incremental optic rule guarantees a wheelhead positioning precision of 0,001 mm. INTERNAL GRINDING SPINDLE As there are many and various types of Internal Grinding Spindles, according to the diameters and lengths that need to be ground, the machine is supplied without an internal grinding spindle, so that the customer may select which type is more suitable for his job. The machine is manufactured standard with a belt transmission suitable for diam. mm. 60, diam. mm. 80 and diam. mm. 100 internal grinding spindles. On request, high frequency spindles may be assembled. WHEELHEAD FOR FACE GRINDING The structure is composed of a carriage, where the face grinding device is located. The positioning is obtained by an hydraulic cylinder. The diamond dressing device is assembled on the face grinding device casing. MANUAL FEED HANDWHEELS Electronic type, with double selection of the increments division 0.1 - 0.01 and 0.001 mm. for wheelhead and table movements. DIAMOND DRESSER The internal diamond dressing device is very strong and is positioned on the table. It starts hydraulically, when the dressing operation is selected, by the operator. The dressing operation may be carried out manually or in automatic cycle. EQUIPMENT AND ELECTRICAL PLANT In a cooled cabinet, separate from the machine. HYDRAULIC PLANT The hydraulic power pack, is separate from the machine and activates the hydraulic diamond dresser and face grinding device. LUBRICATION PLANT The lubrication power pack, is separate from the machine and supplies continuous oil to the wheelhead guides. The recovered oil is filtered and then resent to the power pack. The re-circulating ball screw nut for the working feed, is grease lubricated. COOLANT PLANT Large capacity tank for the coolant water, complete with electric equipment. Equipped with coolant magnet cleaner and coolant paper roll cleaner. PROTECTIONS For the protection of the operator all movable parts are covered with suitable guards. Precisely: protection casing for belts, protection casing for grinding wheel and bellows for guides. The machine is completely closed and the front protection is a sheet sliding doors with poly-carbonate shields. A safety device, does not permit the automatic cycle to start if the front sliding doors are open.

internal diameter 300 mm︱grinding depth 260 mm︱swing diameter 500 mm︱spindle nose A2-5 ︱workhead motor 1,8 kw︱max. workpiece weight 50 kg︱work piece spindle speed 0-1000 U/min︱workpiece length - max. 300 mm︱grinding wheel speeds 20.000 1/min︱grinding wheel motor 3,75 kW︱rapid speed 8 m/min︱positioning accuracy X/Y/Z: 0,001 mm︱repeating accuracy X/Y/Z: 0,001 mm︱ 3350x2250x1950 mm︱Weight approx. 5 t︱CNC controller FANUC CNC-Steuerung 0i T ︱Scales Heidenhain in der X-Achse ︱servo spindle motor für Werkstückantrieb ︱frequency converter ︱3 jaw chuck Ø hydr. 200 mm︱

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internal diameter 250 mm︱grinding depth mm︱swing diameter 455 mm︱workpiece length - max. 1200 mm︱table rotating -4/+8 °︱table speeds 0-4000 mm/min︱max. workpiece weight 80 kg︱workhead - center taper 5 MK︱Rotation speed of workhead 0 - 400 1/min︱workhead motor 4 kw︱3-jaw chuck 250 (selbstschließend) mm︱grinding motor 4 kW︱coolant pump 2,2 kW︱Weight approx. 2,4 t︱machine dimensions 3200 x 2100 mm︱CNC controller Siemens 840 D oder SPS vo ︱servo motors ︱autom. sensing device for grinding wheel Option ︱ ︱linear scales and ballscrew in allen Achsen ︱

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PERFORMANCE AND PRECISION DEGREE Robbi grinding machines are according to the international precision normes ISO 2433. The table movement linearity is guaranteed by a max. deviation of 0,002 mm/mt. The obtainable grinding roundness is : 0,4m (**) (**) for a test workpiece ground in our factory during machine testing The CNC controls : Wheel head movement (AXIS X) Longitudinal table movement (AXIS Z) Work head spindle rotation speed The available programs permit the programming of the following grinding cycles Plunge Cylindrical pass Cylindrical pass with interpolation between table and wheel movement to grind taper workpieces Radius The software for the workpiece grinding operation is very simple and intuitive. To facilitate the programming the software is equipped with an exemplifying graphics, to input the data for each parameter. The software, has been specially studied, so as to permit also non specialised operators to programme without any problems complex workpieces. When the workpiece grinding programme has been completed the CNC will automatically make up a summary list, where only the geometric parameters are evidenced. This list permits with a glance to verify the complete programme; this operation is very helpful to verify eventual input data errors or to check rapidly a workpiece programme when reloaded from the file. While the programme is in execution, it is possible to intervene and modify in real time the technologic parameters, such as: increments, dwell inversion times, sparkout passes. Also, it is possible to intervene with the jog handwheel. The Grinding Machine is composed of : BASE Structure in normalised and stabilised cast iron with large ground guides. The lubrication plant supplies a constant oil flow distributed over the complete length of the guides. In the middle of the base, there is positioned the ball screw for the table longitudinal movement. On all the lower part of the perimeter are situated the recesses for machine levelling. Considering the base structure, usually a foundation is not required. TABLE The table is manufactured in two parts, both are in normalised and stabilised cast iron. The lower part is composed of wide guides which are ground and accurately hand scrapped, for a better sliding. The upper part, is swivelable in the two directions, suitable for grinding tapered workpieces. It includes a micrometric device with centesimal dial gauge for taper control. WORKHEAD The structure in normalised, stabilised and well ribbed cast iron, allows to support the workpiece weight and the force generated by the grinding operation. The spindle rotates on high precision ball bearings, guaranteeing restricted tolerance and maximum rigidity in the working. The spindle rotation is by means of a three phase motor with variable speed controlled by an inverter. INTERNAL GRINDING SPINDLE CARRIAGE The structure is composed of a carriage, where the internal grinding spindle is located. The working feed, is obtained by a re-circulating ball screw and preloaded nut. The screw movement is assured by a brushless motor. The incremental optic rule guarantees a wheelhead positioning precision of 0,001 mm. INTERNAL GRINDING SPINDLE As there are many and various types of Internal Grinding Spindles, according to the diameters and lengths that need to be ground, the machine is supplied without an internal grinding spindle, so that the customer may select which type is more suitable for his job. The machine is manufactured standard with a belt transmission suitable for diam. mm. 60, diam. mm. 80 and diam. mm. 100 internal grinding spindles. On request, high frequency spindles may be assembled. WHEELHEAD FOR FACE GRINDING The structure is composed of a carriage, where the face grinding device is located. The positioning is obtained by an hydraulic cylinder. The diamond dressing device is assembled on the face grinding device casing. MANUAL FEED HANDWHEELS Electronic type, with double selection of the increments division 0.1 - 0.01 and 0.001 mm. for wheelhead and table movements. DIAMOND DRESSER The internal diamond dressing device is very strong and is positioned on the table. It starts hydraulically, when the dressing operation is selected, by the operator. The dressing operation may be carried out manually or in automatic cycle. EQUIPMENT AND ELECTRICAL PLANT In a cooled cabinet, separate from the machine. HYDRAULIC PLANT The hydraulic power pack, is separate from the machine and activates the hydraulic diamond dresser and face grinding device. LUBRICATION PLANT The lubrication power pack, is separate from the machine and supplies continuous oil to the wheelhead guides. The recovered oil is filtered and then resent to the power pack. The re-circulating ball screw nut for the working feed, is grease lubricated. COOLANT PLANT Large capacity tank for the coolant water, complete with electric equipment. Equipped with coolant magnet cleaner and coolant paper roll cleaner. PROTECTIONS For the protection of the operator all movable parts are covered with suitable guards. Precisely: protection casing for belts, protection casing for grinding wheel and bellows for guides. The machine is completely closed and the front protection is a sheet sliding doors with poly-carbonate shields. A safety device, does not permit the automatic cycle to start if the front sliding doors are open.

centre height 200 mm︱internal diameter 1-100 mm︱grinding depth 120 mm︱table adjustment: 250 mm︱total power requirement 10 kW︱weight of the machine ca. 2,5 t︱dimensions of the machine ca. 2x1,7x2 m︱

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Accessories : Three-jaw chuck 125 mm tool spindle head swivelling 30 - 0 - 90 degrees 2 grinding spindles Spare belt unfortunately no coolant tank

315 mm︱ mm︱ 560 mm︱ 12 kW︱ 5,2 t︱

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Table length 1000 mm︱Table width 400 mm︱Grinding length 450 mm︱

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