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Giustina Rotary Surface Grinders are field proven because they are backed by more than 150 years of engineering experience in designing and manufacturing production grinders and special grinding machines for a multitude of industries worldwide.
This series of rotary surface grinders are high production and an efficient solution for processing flat and parallel surfaces at the lowest per piece cost. Available with one, two, three, four or five vertical wheelheads.
These machines are ideal for connecting rods, rocker arm pads, disc brakes or special applications where faces to be ground are offset (on different planes). Equipped with modular wheelhead columns and various rotary table sizes, many solutions are possible according to the process requirements.
Table diameter: 1000 up to 2500 mm.
Grinding wheel diameter: 450 to 660 mm.
Wheel motor power: up to 50 kW
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Features:
Three axes automatic surface grinder with small footprint.
Castings are made of high quality ribbed cast iron, which have been tempered to achieve extreme rigidity.
X&Y slide ways are laminated with Turcite-B, hand-scraped with sufficient lubrication. ( 250AHD with ball bearing table and D-2 (SKD-11) slide ways).
The elevation guide ways (Z axis) are hand-scraped then secured to the column structure.
The spindle is supported by CP4 preloaded super precision angular contact ball bearings. This will guarantee a maximum run-out of 2 microns for heavy duty, stable and accurate grinding.
Separate hydraulic system with a specially designed valve enables smooth table reversing with a 26 meter/min table speed.
Automatic lubricating system to ensure smooth and long lasting operation in all 3-axes.
Automatic down-feed gearbox for accurate down-feed increment.
Sizes available from ( 250~400 )mm by ( 500~800 )mm.
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Grinding machines with sliding - R50 30
TRAVELS
Longitudinal travel 630 mm
Cross travel 310 mm
Vertical travel 400 mm
Distance between table and grinding wheel 460 mm
Distance between electo-permanent chuck and grinding wheel 390 mm
Distance between ground and magnetic chuck top part 1020 mm
SPINDEL & GRINDING WHEEL
Spindle power with electronic starter 2,2 / 3 kW/hp
Standard dimensions of the grinding wheel 225 x 25 x 76 mm
Rotation speed of the grinding wheel 2850 rpm
Wheel-dressing system on spindel : Z'=52mm Y'=35 mm
MOVEMENT
Automatique longitudinal travel with 3 phase motor and frequency converter : variable speed 1 à 30 m/mn
Automatic cross travel : incremental movement, continuous scanning and quick
movement with variable speed
40 à 1000 mm/mn
Ball screw with electronic vernier 0,001 mm
Rapid vertical feedrate 300 mm/mn
Slow vertical movement speed 0,3 à 10 mm/mn
Vertical ball screw with electronic vernier to 0,001 mm
ELECTRO-PERMANENT CHUCK
Ajustable attraction power, complete automatic demagnetization NEOMICRO 500 x 300
OVER-ALL MEASURMENTS AND SUPPLIES
Machine dimensions 1930 x 1690 x 1800 mm
Running dimensions 2590 x 1690 x 1800 mm
Total machine power 6 kW
Load capacity in addition to the chuck 300 kg
Machine net weight 1700 kg
VERSION SM
Rapid vertical feedrate 0,1 à 650 mm/mn
Slow vertical movement speed 0,1 à 2 mm/mn
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The ULC/ULG series has been developed with the goal of turning and grinding free-form surface and asphere lenses as well as their respective molds with high efficiency and high precision. Moreover, as shown in the figures below, optimized machine structure and options are available for various applications and high cost performance is achieved.
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Channel grinder
to relief-grind automatically narrow radii or to grind-in rule joints. MDM capable.
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MAXI
Traveling column surface grinding machines with 2 automation level:
CN compact plus / CNC diatronic
9 models: 1200/750 - 1500/750 – 2000/750
2000/1000 – 2500/1000 – 3000/1000
2000/1100 – 2500/1100 – 3000/1100
Max. grindable surface: 1200x750(775) ÷ 3000x1100 mm
The traveling column plane surface grinding machine of the MAXI line are advanced technology machines designed and built to assure high production capacity, precision and reliability. The T-structure of the highest rigidità is made from stress-relieved Meehanite cast iron. All machine axis slideways (table, column and wheelhead) are hydrostatic. The hydrostatic lubrication, eliminating sliding friction, allows to use all the power installed and to achieve extremely regular and precise movements without wear and stickslip effects.
The spindle (original DELTA design) is the fruit of many years of study and experimentations, and is one of
DELTA grinding machine strong points. The spindle, directly driven via coupling by a servoventilated motor,
is supported on the wheel side by a no-wear hydrodynamic bearing of the Mackensen type providing for very
smooth rotation and very quiet operation. A pair of preloaded precision ball bearings are mounted at the back.
The attention paid to the ergonomy of the machine, provided with complete protection, allows the operator
of a very good view and to work very easily under the best safety conditions, simplifying loading and unloading
operations.
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MINI
Traveling column surface grinding machines with 3 automation level:
Diastep / CN compact plus / CNC diatronic
Models: MINI 12 - Max. grindable surface 1300x650 mm
MINI 15 - Max. grindable surface 1500x650 mm
The traveling column plane surface grinders of the MINI line are advanced technology machines designed and built to assure high production capacity, precision and reliability.
The T-structure of the highest rigidità is made from stress-relieved Meehanite cast iron.
All machine axis slideways (table, column and wheelhead) are hydrostatic.
The hydrostatic lubrication, eliminating sliding friction, allows to use all the power installed and to achieve extremely regular and precise movements without wear and stickslip effects.
The spindle (original DELTA design) is the fruit of many years of study and experimentations, and is one of DELTA grinding machine strong points. The spindle, directly driven via coupling by a servoventilated motor, is supported on the wheel side by a no-wear hydrodynamic bearing of the Mackensen type providing for very smooth rotation and very quiet operation. A pair of preloaded precision ball bearings are mounted at the back. The attention paid to the ergonomy of the machine, provided with complete protection, allows the operator of a very good view and to work very easily under the best safety conditions, simplifying loading and unloading operations.
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Features
- Longitudinal slideways.
- High precision heavy duty spindle design .
- Automatic lubrication system.
- Stable feed , superior accuracy.
- Smooth and accurate wheelhead movement.
- Automatic wheel dressing with.
- Compensation .
- Computer-Aided engineering .
- Spindle head counterweight balance system.
- Hydraulic system temperature regulator
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PLANE SURFACES VERTICAL AXIS GRINDING MACHINES
The vertical axis grinding machines DELTA are machines designed
and made with modern technologies and on the basis of a long and
consolidated experience in the sector (over 20.000 units sold all over
the world).
Quite easy to use and highly reliable, these grinding machines are
employed in many and different fields: from micromechanics to the
aircraft, shipbuilding and motor industry; from the tool industry to
material testing laboratories, technical institutes and vocational
schools; from the sheet metal industry (where they are used for the
sharpening of punches) to the wood industry; from the industry of
machine tools, household appliances, etc., to the food industry.
MODELS
LB300 AND LF350 WITH FIXED TABLE
Max. grindable surface 330x140 mm / 360x155 mm
LC400 AND LC500 WITH ROTATING TABLE
Max. grindable surface ø300 / ø400 / ø500
LP500/200 WITH OSCILLATING TABLE
Max. grindable surface 500x200 mm
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Surface grinding machines
