GMT represents Berg Spanntechnik in India

Berg Spanntechnik is one of the leading specialists in tool clamping technology worldwide. The product range includes clamping systems for quick-release taper and hollow shaft tools in innumerable standard variants and special versions.

In addition to clamping systems for pallets, devices and changing processing units this product group also includes electro-mechanical and electronically programmable clamping systems offering an extensive capacity range.

Berg Spanntechnik supplies die clamping systems, slide locking systems, clamping systems for moving bolsters and transfer couplings for forming machines.

1. Clamping Systems - Tool Clamping

• Gripper HSK-Hollow Shank Tooling
• Standard HSK Gripper with force amplification / option preholding function
• Standard HSK Gripper with preholding function

Clamping Systems SK-Steep Taper Tooling

• Gripper SK Tooling
• Standard SK Gripper
• SK Gripper with preholding function
• SK Gripper with force amplification

Clamping Systems Coromant CaptoT

• Gripper Coromant CaptoT

Medium transfer (draw-bar/gripper
Spring Stacks
Operating systems

• Hydraulic Cylinder HDZ
• Multi-Energy Supply
• Hydraulic Cylinder HLZ
• Hydraulic Cylinder - HLZE
• Pressure Intensifer
• Rotating Hydraulic Cylinder
• Rotating Electromechanical Actuator

Hydraulic self-locking clamping systems
Clampforce Gauge System
2. Clamping Systems - Special Application

• Clamping head
• Clamping head self-locking, spring loaded
• Clamping head self-locking
  
• Zero point clamping system
  
• Clampforce gauge system for SP..., NSM-HV
  
• Hydromechanical clamping unit
  
• Electronically programmable clamping system
• Stationary electro-mechanical actuators with rotary power take-off
• Stationary electro-mechanical actuators with rotary power take-offt and automatic shifting mechanism
• Stationary electro-mechanical actuators with rotary power take-off and hydraulic (pneumatic) shifting device
  
• Hydraulic (pneumatic) central distributor
  
• Handling system

3. Clamping Systems - Forming technology
Clamping Systems with AS-Interface
Stationary Clamping Systems

• Electromechanical Clamping System Swing Out Style
• Electromechanical Clamping System Rotational Style
• Electromechanical Clamping System Pull-Back Rotational Style
• Electromechanical Clamping System Gripper Style
• Electromechanical Moving Bolster Clamp Wedgebar Style
• Hydromechanical Clamping System Wedgebar Style
• Hydromechanical Clamping System Swing Out Style
• Hydromechanical Clamping System Pull-Back Rotational Style

Self-Travelling Clamping Systems

• Electromechanical Clamping System Wedgebar Style
• Electromechanical Clamping System Bellcrank Lever Style
• Mechanical Clamping System Disk Spring Washer Style
• Hydromechanical Clamping System Drawbar Style
• Hydromechanical C-Clamping System selflocking
• Hydraulic Clamping System Drawbar Style
• Hydraulic C-Clamping System
• The Clamping Actuator with Push Pull Chain

Manually movable Clamping Systems

• Hydromechanical Clamping System Drawbar Style selflocking
• Hydromechanical C-Clamping System selflocking
• Hydromechanical Clamping System Drawbar Style
• Hydraulic C-Clamping System

Manual Clamping Systems

• Mechanical Clamping System
• Mechanical C-Clamping System

Slide Locking System Hydraulic Cushion Style
Transfer Rail Couplings

• Manual operated Transfer Rail Coupling Eccentric Cam Style
• Manual operated Transfer Rail Coupling Swing Out Style
• Electromechanical Transfer Rail Coupling
• Electromechanical Transfer Rail Coupling
• Hydromechanical Self-locking Transfer Rail Coupling
• Pneumatical Self-locking Transfer Rail Coupling

Clampforce gauge system
For more information contact www.gmt.co.in
Or call us at +918754483577

Indexing Tables for Special Purpose Machines

Hydraulic Rotary Indexing Tables (315mmØ to 1000mmØ) fitted with imported Hirth couplings, are designed for use on Special Purpose Machines, which ensure accurate indexing and repeated positioning. Both Universal (Maximum 8 indexing stations) and Fixed indexing models are available. An adjustable speed-control is available. Clockwise or anti-clockwise rotation is optionally available.

Pneumatic Rotary Indexing Tables (160mmØ to 315mmØ) fitted with imported Hirth couplings, are designed for use on Special Purpose Machines, which ensure accurate indexing and repeated positioning. Both Universal (Maximum 8 indexing stations) and Fixed indexing models are available. An adjustable speed-control is available. Clockwise or anti-clockwise rotation is optionally available. 
For more information visit www.gmt.co.in

Heavy duty single side lapping machine from GMT

	Models 300mm and 400mm dia :
GMT 300mm and 400mm dia lapping machines are bench models and are robust. The lap plate and conditioning rings are made from special, close-grained, cast iron. The lap plate is supported on a preloaded taper roller bearing for maximum stability.

Standard Equipment :
	Heavy duty steel fabricated housing.
	Abrasive distribution system with pump, tank and infinitely variable flow control.
	Cast alloy lap plate, radially serrated.
	Three adjustable conditioning rings with yoke and bearing assemblies.
	Automatic lapping cycle timer.
	Drive unit, 0.37 kw motor with gear box.
	Reverse mechanism.
	Three pressure plates with lifting eye bolts.
	Three felt pads.
Optional Equipment :
	Variable speed drive.
	Special lap plate for lapping tungsten carbide, ceramics, etc.
	A handy machine cabinet which permits storage for all accessories.

GMT Metrology bed plates and special products

Large Size GMT Cast iron bed Plate Size: 6000X4000 mm (consists of 4000x1500– 4 Nos)

Cast Iron Bed Plates Size : 7000 X 500 X 250 mm Cast Iron Bed Plate  Size : 4000 X 1250 mm Cast iron Matched surface plates Size : 4000 X 3000 mm (3000 X 1000 – 4 Nos) Cast Iron Bed Plate Size : 9000 X 350 mm (3000 X 350 – 3 Nos) Cast Iron Matched Surface Plate Size : 6000 X 3000 mm (3000 X 1000 – 6 Nos) Cast Iron Matched Surface Plate Size : 4800 X 2400M (2400 X 1200 – 4 Nos)

GMT BELT GRINDING MACHINE

GMT is among the leading belt grinder manufacturer in India. Belt Grinding Machines achieve rates of high production efficiency, quality finish and economy never realized in any other method of grinding or polishing. For example, by changing grit sizes, a machine may be converted from a heavy duty grinder to a fine micro-polisher. Belt grinding machines can be adopted for semi-automatic or fully automatic working. Further, in most applications, belt grinding imposes less strain on the workpiece when compared to other forms of grinding, cracking, burning etc, do not occur.
Classification of Belt Grinding Machines
Abrasive belt grinding machines are usually classified by the surface that forms the backup of the coated abrasive at the work area. This backup has an important effect on the material removal rate and on the finish. The backup governs choice of contact pressure, the angle of cut and the speed of operation. Belt Grinding Machines may be broadly classified according to the backups used as : Platen Grinding Machines: Contact Wheel Grinding Machines Free Belt Grinding Machines Centreless Grinding Machines In construction, all the machines are similar. A coated abrasive belt runs over two pulleys - one driving pulley one idler pulley. There is (a) provision to prevent the belt from 'walking' or 'running' off the pulleys.

Accuracy, applications and features of GMT Planetary Lapping Machines

Accuracy:		Planetary Lapping Machine Lap plate with work carriers Optical flat
	One light band to two light band over 75Ø component. (i.e. 0.3µ to 0.6µ over 75mmØ).
	Surface finish : 0.2µ Ra.
	Parallelism : 0.002mm over 75mmØ.
Applications :
These machines can be very sucessfully used in:
	Electronic industries for lapping silicon wafers, germanium wafers, ferrite and piezo electric ceramics.
	Pump industries for lapping mechanical seals made of tungsten carbide and ceramics.
	Air compressor industries for lapping compressor valve plates.
	Automotive industries for lapping thrust washers and distance pieces used in power steering.
Features :
	The machine is constructed on a rigid welded hollow section steel frame, which houses a AC motor offered with variable frequency drive and a worm and worm wheel reduction gear unit.
	The central gear, internal ring gear and work carriers are driven a AC motor.
	The drive from the AC motor is taken through a worm and worm wheel reduction unit and then goes centrally through the main spindle to the central gear to the internal ring gear, through the work carriers.
	The drive from reduction gear unit is through a unidirectional clutch arrangement. This arrangement ensures a smooth motion when the machine is started. This feature also eliminates breakage of fragile components like silicon and germanium wafers while starting and stopping the machine.
	Both the lap plates are stationary. The differential motion given to the work carrier results in a random figure of '8' motion. This ensures that the component comes in contact over the entire area of the lap plate in so far as is feasible in line with the geometry of the component.
	A special camel back straight edge permits rapid and accurate assessment of the flatness of the lap plates.
	A set of special cast iron lapping gears are supplied with the machine for relapping the top and bottom lap plates.
	An independent slurry pump feeds the mixture of abrasive and oil to an abrasive feed assembly.It is then distributed through a spider to the working face by means of strategically located holes. A separate stirrer motor is attached with the pump to continuously stir the abrasive with oil.
	The main spindle bearings are sealed against ingress of the abrasive slurry. The used slurry is carried away by a suitable arrangement and is collected in a removable tank.

ADVANTAGES OF GMT PLANETARY LAPPING MACHINE

GMT Flat Lapping Machines

GMT Planetary Lapping Machines can lap both sides of a work piece simultaneously. As a consequence work pieces are processed efficiently without manual interruption to get improved parallelism and acts as an surface finishing machine. This double sided lapping machine is an ideal lapping tool for lapping silicon wafers and germanium wafers. 

GMT planetary lapping machines finds application in electronics, quartz, ceramics, semiconductor, surgical instruments and optical industries 

Workpieces to be lapped are placed inside the work carriers. The work carriers are gear cut on the outer diameter and recessed to hold the component inside. Abrasive fluid is fed onto the lap plates continuously. 

The planetary lapping machines are ideally suited to lap thin, fragile materials like silicon and germanium wafers extensively used in electronic industries. Other materials made of tungsten, ceramics, steel, bronze, carbon, aluminum, cast iron, plastics, stainless steel, stellite, ferrite and alumina can also be lapped on these machines.