LUDWIG HUNGER WERKZEUG- UND MASCHINENFABRIK GMBH

The new portable HUNGER universal refacing machine UDM4E is a versatile machine offering a choice of modular components for refacing valves and valve seats as well as counterboring seat ring pockets and resurfacing the sealing surfaces on cylinder heads, cylinder liners and engine blocks of large diesel and gas engines. Key features: - No abrasive dust. A fast clean cut, - Compact and handy design - Modular add-on components provide a flexible solution for multiple projects - Powered by SELV (Safety Extra Low Voltage) to avoid risk of electrical shock - Power supply with universal AC input - Fast set-up time - Easy to use - The economical solution for both field and workshop use »Roundness, concentricity and surface finish of the refaced faces are within manufacturers’ specifications or even better«

Machine Base Heavily ribbed cast iron structure for vibration-free performance. Adjustable slideways for wheelhead infeed and workhead traverse. Wheelhead Box type monobloc noted for its excellent vibration dampening characteristics. The precision motor grinding spindle is permanently sealed and lubricated. Workhead Located on a swivel plate which can be set to the required angular position by means of a wide-spaced scale. Collets for perfect valve alignment. Dressing Attachment The dressing attachment is permanently mounted on the worktable for rapid wheel dressing. Wet Grinding Coolant is delivered by an industrial type flood pump. The baffled coolant tank is easily removed from the machine base for cleaning. Electrical System Individual grinding spindle motor, work spindle motor and coolant pump motor all controlled by switches grouped in front of the wheelhead for ease of operation.

Machine Base Heavily ribbed cast iron structure with integrated slideway for wheelhead. The machine base houses an industrial type flood pump for delivering coolant to the grinding site and a baffled coolant tank which can be drawn out for ease of cleaning. Workhead and Steady Rest Both the workhead and the steady rest are adjustable along the swivel plate to clamp each valve on that part of the valve stem which normally travels in the valve guide. The combination of collet chucking and the unique Hunger steadying provides double support of long valves to ensure the ultimate in valve refacing accuracy. Automated Oscillation An oscillating equipment for automated power traverse of valve face across the grinding wheel is available as an option to ensure efficient stock removal and superior finish. The stroke of oscillation is infinitely adjustable.

Machine Base Heavily ribbed cast iron structure with integrated dove tailed slideway for the workhead and steady rest. The machine base houses an industrial type flood pump for delivering coolant to the grinding site and a baffled drawer type coolant reservoir which can be drawn out for ease of cleaning. The machine base houses also the control panel for the motors. Grinding Spindle The permanently sealed and lubricated grinding spindle slides on a swivel plate which is provided with an integrated dove tailed slideway. The swivel plate is set to the desired valve angle by means of a wide spaced scale. Steady Rest An unique selfcentering steady rest is provided for additional support of long stem valves. Both the workhead and the stready rest are adjustable along the slideway on the machine base to clamp the valve on that part of the valve stem which normally travels in the valve guide.

Machine Base Heavily ribbed cast iron structure with integrated dove tailed slideway for the workhead and steady rest. The machine base houses an industrial type flood pump for delivering coolant to the grinding site and a baffled drawer type coolant reservoir which can be drawn out for ease of cleaning. The machine base houses also the control panel for the motors. Grinding Spindle The permanently sealed and lubricated grinding spindle slides on a swivel plate which is provided with an integrated dove tailed slideway. The swivel plate is set to the desired valve angle by means of a wide spaced scale. Steady Rest An unique selfcentering steady rest is provided for additional support of long stem valves. Both the workhead and the stready rest are adjustable along the slideway on the machine base to clamp the valve on that part of the valve stem which normally travels in the valve guide.

Selfcentering Steady (Option) Selfcentering steady rests are available to fit on the swivel plate slideway for additional support of long stem valves. Both the workhead and the stready rest are adjustable along the swivel plate to clamp each valve on that part of the valve stem which normally travels in the valve guide. The combination of collet chucking and the unique Hunger steadying provides double support of long valves to ensure the ultimate in valve refacing accuracy. Oscillating Equipment (Option) An oscillating equipment for automated power traverse of valve face across the grinding wheel is available to ensure efficient stock removal and superior finish. The stroke of oscillation is infinitely adjustable. Automated Infeed (Option) Power infeed is available for automatic grinding according to a preselected program. The feed rate, the total infeed and the sparkout time can be easily selected.

Application The SG 175 support grinder is designed for grinding the conical seating surface of valves of medium speed diesel engines on a standard lathe. Handling The support grinder is clamped in the toolpost located on the top slide of the lathe. The grinding angle corresponding to the required valve seat angle is adjusted by turning the top slide of the lathe to an angular position which corresponds to the valve seat angle and which is defined by the template supplied with the grinder. The valve stem is clamped in the chuck of the lathe and the valve face is ground by feeding the grinding wheel into the rotating valve face. Features The precision grinding spindle is permanetly sealed and lubricated for lifetime accuracy. The wheel guarding system is designed to the prevailing safety regulations. The cone-shaped head of the template is provided with a bore receiving the dressing diamond so that the grinding wheel can be properly dressed after adjustment of the grinding angle.

Advantages - Very short refacing time! - No dust! - No noise! - Powered by low operating voltage! Features The machine is fitted with two motors providing a smooth cutting action. The operating voltage supplied to the motors by a compact power supply unit is of the low voltage type to eliminate electric hazards. The exchangeable adapter head with the built-in slideway for cutting tool travel ensures a precise seat angle eliminating faulty setting operations. Roundness, concentricity and surface finish of the refaced valve seat are within manufacturers’ specifications or even better. Handling Setup is fast and easy. First, lock the pilot with mounted centering spider in the valve guide. Then, lower the machine over the pilot and position the cutting tool in front of the inner edge of the valve seat. Turn micrometer downfeed to set the desired depth of cut. Refacing is automatic. Pressing one button is enough to start the refacing pass.

Advantages - Very short refacing time! - No dust! - No noise! - Powered by low operating voltage! Features: The machine is fitted with two motors providing a smooth cutting action. The operating voltage supplied to the motors by a compact power supply unit is of the low voltage type to eliminate electric hazards. The exchangeable adapter head with the built-in slideway for cutting tool travel ensures a precise seat angle eliminating faulty setting operations. Roundness, concentricity and surface finish of the refaced valve seat are within manufacturers’ specifications or even better. Handling Setup is fast and easy. First, lock the pilot with mounted centering spider in the valve guide. Then, lower the machine over the pilot and position the cutting tool in front of the inner edge of the valve seat. Turn micrometer downfeed to set the desired depth of cut. Refacing is automatic. Pressing one button is enough to start the refacing pass.

Advantages - Very short refacing time - Easy to use - Modular add-on components - Powered by low operating voltage Features The machine is fitted with two motors providing a smooth cutting action. The operating voltage supplied to the motors by a compact power supply unit is of the low voltage type to eliminate electric hazards. The exchangeable adapter head with the built-in slideway for cutting tool travel ensures a precise seat angle eliminating faulty setting operations. Roundness, concentricity and surface finish of the refaced valve seat are within manufacturers’ specifications or even better. Handling Setup is fast and easy. First, lock the pilot with mounted centering spider in the valve guide. Then, lower the machine over the pilot and position the cutting tool in front of the inner edge of the valve seat. Turn micrometer downfeed to set the desired depth of cut. Refacing is automatic. Pressing one button is enough to start the refacing pass.