Jyoti CNC lathes take heavy, stable, cuts

Jyoti slant-bed DX Series CNC lathes from Fortron use high grade close grain cast iron structures for stability and minimal distortion, enabling heavy cuts for improved productivity.

UK machine tool agent, Fortron UK, showed examples of the Jyoti DX series CNC lathes range at the UK's MACH 2008 machine tool exhibition last week.

The DX Series feature a rigid single piece slant bed and saddle made from high grade close grain cast iron for stability and minimal distortion, enabling heavy cuts for improved productivity.

Fortron told manufacturingtalk that the machines exhibit virtually no vibration.

It results in better surface finishes even on hard materials.

The smaller DX 100, DX 160 and DX 200 lathes use a 30 deg slant bed while the larger DX 250 and DX 350 machines have a 45 deg bed.

* Consistent machining performance - Jyoti's 'Step-up Structure Concept' enables consistent machining performance because of widely spaced linear guideways.

The machines also have three-point levelling, which eliminates any twisting of the bed and minimises the time and effort needed to install or relocate them, said Fortron.

Features of the DX Series include the following.

* Power outputs from 7kW for the DX 100 up to 25.5kW for the DX 350.

* Standard turning diameters are from 100mm diameter up to 400mm diameter.

* Axis travels range from 360mm in X and 200mm in Z for the DX 100 up to 250mm in X and 1700mm in Z for the long bed version of the DX 350.

* All have rapid traverse rates of 24m/min.

Fortron said that every spindle for the DX series is manufactured in-house at Jyoti using world class machinery and assembled in a cleanroom.

The spindle is housed in a cartridge with three super precision angular contact bearings in the front and two angular contact bearings at the rear end.

This design is suited to the radial as well as the axial cutting loads.

UK sales manager, Mark Devall, said: "As the UK's premier manufacturing technology event, MACH provided the ideal opportunity to demonstrate to UK industry the Jyoti DX series.

The DX 200 shown on our stand provided a great example of the outstanding value to machine performance ratio available from Fortron".

* DX 200 - equipped with an eight-station high speed bi-directional tooling turret, the DX 200 has a tool change time of just 0.5s.

With axis travels of 200mm and 500mm in X and Z respectively, the DX 200 has a 12kW motor.

Swing over bed is 500mm and maximum turning diameter is 350mm.

A manually movable tailstock with hydraulically actuated quill is a standard feature of the DX 200.

A programmable tailstock with hydraulic motion is offered as an optional extra.

Control system is the Siemens 802D CNC.

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