LUDWIG HUNGER WERKZEUG- UND MASCHINENFABRIK GMBH

Application The VD4HD/-30° can be used for refacing the external conical landing face on valve cages. Capacity Max. refacing diameter 250mm Angle of transverse feed -30° Features Drive unit and gear head of the VD4HD/-30° are identical with the drive unit and gear head of the VD4E Valve Seat Refacing Machine. If a VD4HD is already on hand, only the D4/-30° adapter head is required for refacing the external conical landing face on valve cages. The D4/-30° adapter head is bolted to the gear head in place of the seat refacing adapter head. The pilot used for valve seat refacing can be also used for centering the VD4HD/-30°.

Working Principle: The counterbore is machined to the preset depth by the simultaneous application of both a rotary and vertical or horizontal feed motion to the carbide cutting insert. While the cutting insert rotates in a circle around the counterbore, a feed gear mechanism ensures a continuous feed motion. The lathe-type refacing action provides smooth and closely fitting contact surfaces for oversize valve seat rings. Features: The motor drive unit of the VD4HD-ADM is identical with the motor drive unit of the VD4HD Valve Seat Refacing Machine and, therefore, is only required, if no VD4HD is at hand. Two types of exchangeable boring gear heads are available. The standard AV boring head is provided with a vertical slide for counterboring. The optional AVH boring and facing head is provided with a vertical and a horizontal slide for counterboring and facing the bottom of the bore.

Application The VD4HD-RC is designed for refacing • the landing surface for the cylinder liner on the engine block, • the landing surface for the cylinder head on the cylinder liner and • the landing surface for the cylinder liner on the cylinder head. Features Drive unit and gear head of the VD4HD-RC are identical with the drive unit and gear head of the VD4HD Valve Seat Refacing Machine. If you have already a VD4E machine and you want to use it with our new face turning heads, we can convert it into the new high performance VD4HD System. The three available face turning heads should be used according to our recommendation with the VD4HD drive unit and the related power supply type 4HD. We would be glad to advise you about our new VD4HD system and send you an offer for this. The D4/0° adapter head is bolted to the gear head in place of the valve seat refacing head. The VD4HD-RC is centered by a pilot assembly which is designed to fit to the engine component to be serviced.

Application The RCM is designed for refacing - the landing surface for the cylinder liner on the engine block, - the landing surface for the cylinder head on the cylinder liner - the landing surface for the cylinder liner on the cylinder head. Capacity Refacing diameter range 200 - 720mm Features The RCM is fitted with two motors providing a smooth cutting action. The speed of the motors is infinitely variable so that the cutting speed can be adapted to the diameter and material of the landing surface. A separate power supply unit is provided for ease of operation. A small hand-held remote control is supplied so that the operator can conveniently switch on and off the machine while watching the refacing operation. The remote control includes an emergency stop to stop the machine in case of emergency. The RCM is centered by a pilot tailored to the specific engine component to be serviced.

Application The Hunger SHM is designed for precision honing of cylinder liners with bore diameter from 150 to 640 mm. Features • Air powered honing. Powerfull air motor for rotary motion of honing head, air hoist for stroke motion and, as an unique feature, air cylinders for stone feeding. • Superior control. Manual buttons are provided for fine adjusting setting of honing head RPM, stroking rate and stone feeding pressure. • Pressure gauges for displaying the selected setting of honing head RPM, stroking rate and stone feeding pressure. • Two-hand control actuation to protect the operator according to the stringent EC safety regulations. • Automated stroking between adjustable end stops. • Drawer-type honing liquid reservoir acting as support for the cylinder liner and mounted on casters for ease of loading and unloading the cylinder liner.

Application With the mobile honing machine PHM, the cylinder liners of large diesel engines can be honed in the crankcase when installed. The stationary honing machine base HMB is required for honing removed cylinder liners. An optional comfort control panel including the regulator valves and the manometer gauges can be provided at the lower end of the preassembled drive unit within easy reach of the operator while standing at cylinder liner level. A single central air treatment unit with air filter and lubricator is also provided for trouble free operation. Automatic stroking is available as a option. The stroking lenght can be adjusted by means of end stops.

Application The HMB Honing Rigs are designed for honing cylinder liners removed from the engine block with the corresponding mobile Hunger PHM Honing Machines. - Honing Rig Type HMB 340 is tailored to the Honing Machine Type HBM 340. - Honing Rig Type HMB 640 is tailored to the Honing Machine Type HBM 640. Features Rigid base structure including upright supporting tubes for mounting the mobile PHM Honing Machine. The liner to be honed is placed on top of a honing liquid reservoir which is slideably mounted on the base structure. The reservoir can be drawn out for ease of loading and unloading of the cylinder liner by means of a crane. An electric pump is provided to supply honing liquid to a spray nozzle. The spray nozzle is mounted on a magnetic base which can be attached to the frame tube to direct the honing liquid to the area to be honed.

Application The NTS is designed for testing and servicing fuel injectors of large diesel engines. Use NTS for examining the spray pattern, for leak testing of the needle seating and for. Features The infinitely adjustable testing pressure is is generated by means of an air powered double acting high pressure pump. The attachment for clamping the fuel injector is of rigid design and swivel-mounted so that the injector can be turned to horizontal position for ease of servicing. The transparent container for collecting the testing liquid is provided with an outlet for removing the liquid by suction.

Application The portable HD 1500 is designed for delivering high hydraulic pressure up to 1500 bar required for operating hydraulic tools, especially hydraulic tools for loosening and tightening the clamping connections provided at large diesel engines. Capacity hydraulic pressure up to 1500 bar. Drive medium Compressed air with at least 6 bar. Features The hydraulic pressure is adjustable up to 1500 bar. Up to four hydraulic tools can be supplied simultaneously.

Application The portable HD 2500 is designed for delivering high hydraulic pressure up to 2500 bar required for operating hydraulic tools, especially hydraulic tools for loosening and tightening the clamping connections provided at large diesel engines. Capacity hydraulic pressure up to 2500 bar. Drive medium Compressed air with at least 6 bar. Features The hydraulic pressure is adjustable up to 1500 bar. Up to four hydraulic tools can be supplied simultaneously.