RYAZAN MODEL RT317-8 Manual Lathe

This machine is of much heavier construction than the previous lathes listed featuring wider bed design. Maximum diameter 1700mm over the bed, 1200mm over the carriage and 8000mm between centres. This model incorporates reduction drive pinion and ring gear onto the chuck for heavy cutting applications.

FEATURES

The machine is designed for performing various lathe operations, including taper turning and cutting metric, inch and module threads. Compared to other machines of its class, the lathe offers higher rigidity, vibration resistance and non susceptibility to thermal effects. These features allow machining to higher accuracy.

Ample power of main drive, a wide range within which spindle rotation frequency and feed rates can be carried, enable high speed steel and carbide tipped tools to be used expediently for machining ferrous and non ferrous metals.

This machine is a very heavy duty lathe built to toolroom standards. The main speed box has 24 speeds ranging from 5 500 r.p.m. It is a fully enclosed gearbox with it’s own lubrication system fed by a plunger type pump, cam operated from gearbox lay shaft. The headstock has no clutches at all and has to be started forward and reverse from a stop position. When using low speeds (5 63 revs.) the 1250mm diameter steel 4-jaw chuck supplied with the machine is driven via a pinion gear meshing with an internal ring gear on the back of the chuck. This ensures ample power while turning at slow speeds on large diameters, an electro magnetic brake is supplied.

The feed box is mounted on the front of the machine below the speed box and has its own lubrication system with a similar plunger type pump operated on the feed shaft, all gears and spline shafts are made from alloy steel and are hardened and ground, in the feed box and speed box. All feeds and thread cutting speeds can be easily changed without the need for additional change gears. An amp meter is located on the panel beside the headstock which can be easily seen from the saddle.
The saddle is supplied with quick traverse which is driven through a separate motor mounted on the right hand lower end of the saddle and supplies drive through a gearbox and two electro magnetic clutches which has a separate lubrication system to drive quick traverse, longitudinal and cross directions. The quick traverse is controlled by a four way switch (joystick) mounted on a panel above the quick traverse electric motor. The quick traverse is simply selected by pushing the four way switch in the direction you want to go which automatically engages the feed and by pushing the button located on the top of the four way switch engages the quick traverse in the same direction. A work light is mounted on the saddle.

All RT317 series machines are equipped with an additional guide rail which is mounted on the front face below the apron. This guide rail takes tool load when the tool is machining large diameters.
All RT317 lathes are equipped with toolslide which sits on top of the compound slide. The toolslide has a movement of approximately 150mm and has no power feed to this slide.

The on/off switch for the coolant pump is mounted below the quick traverse switch. On the end of the saddle to the left of the quick traverse switch are three switches – one is emergency stop, one forward direction and the other reverse direction. These switches are also mounted on the headstock. below these switches is a lever for engaging and disengaging the lead screw. A cross slide handle and longitudinal handle are fitted with a safety device so that it does not spin while in quick traverse.

The travelling steady is mounted at the back of the cross slide on the saddle. The travelling steady and the mounting frame are two separate pieces and it enables you approximately 300mm of longitudinal adjustment of the position of the travelling steady. This means that the travelling steady can be fixed either behind or in front of the tool. The travelling steady’s capacity is approximately 250mm diameter.

The machines are fitted with a heavy duty tailstock which is equipped with its own quick traverse drive and these lathes are capable of carrying workpieces weighing up to 10,000 kgs between centres. The tailstock is of extremely heavy construction and is fitted with built in live centre by simply inserting a dead centre. When drilling, the live centre becomes dead.

The tailstock quill is fitted with both a conventional feed handle at the end and to the side of it a reduction feed device which makes it much easier for heavy drilling. The tailstock is moved along the length of the bed by the means of a pinion gear engaging with an inverted rack on the under side front edge of the bed and is moved via a crank handle. When locking the tailstock, there is a pin device which engages with lugs on the bed itself, a combination of the tailstock locking on this bed lug and four lock down screws maintain an absolute positive locking while doing heavy work.

The fixed steady rest has a maximum diameter of 500mm and is supplied with hardened rollers on the tips as well as two sets of roller guides to enable the full movement. There is also an open-type steady rest provided with diameter range 600mm to 950mm.

The bed of the machine is a one- or two-piece casting depending on the length which has a very wide longitudinal slide and a heavy web construction making it easy to remove the swarf from the back of the machine. The slideways are hardened and ground and the base of the machine houses a coolant tank and pump.

Safe operation on the machine is ensured due to provision of a safeguard for the chuck and zone of cutting, mechanisms for disengaging the handwheels of longitudinal traverse and cross traverse, use of low voltage in control circuits.

SPECIFICATIONS

Maximum diameter over bed 1700mm
Maximum diameter over carriage 1300mm
Maximum length between centres 8000mm
Maximum diameter of surface machined – over bed 1300mm
Maximum diameter of surface machined – over carriage 1300mm
Maximum length of machining 7700mm
Maximum length of machining taper using taper turning attachment 700mm
Maximum angle of machining using taper turning attachment +/-10°
Maximum weight of workpiece held between centres 10000kg
Height of cutting tool set in toolpost 50mm
Inside cone of headstock spindle Metric 140
Spindle bore 128mm
Tailstock taper Morse 6
Spindle nose, DIN 15
Maximum carriage travel – Longitudinal 7700mm
Maximum carriage travel – Cross 750mm
Maximum carriage travel – Compound slide 240mm
Spindle speed range 5-500rpm
Feed ranges, mm/minute – Longitudinal 0.06-2.27
Feed ranges, mm/minute – Cross 0.022-0.825
Feed ranges, mm/minute – Compound slide 0.022-0.825
Pitch of thread cut – Metric thread 1-96mm
Pitch of thread cut – English thread 24-¼TPI
Pitch of thread cut – Module thread 0.5-24mm
Pitch of thread cut – Pitch, diametral pitch 96-1
Number of thread ranges – metric 45
Number of thread ranges – English 34
Number of thread ranges – module 33
Number of thread ranges – pitch 38
Number of feed ranges – longitudinal 64
Number of feed ranges – cross 64
Number of feed ranges – compound 64
Rapid traverse speed – longitudinal 3000mm/min
Rapid traverse speed – cross 1000mm/min
Rapid traverse speed – compound slide 1000mm/min
Main motor drive power 30kW
Total of installed power 32.76kW
Overall dimensions – Length 11200mm
Overall dimensions – Width 2275mm
Overall dimensions – Height 2450mm
Overall dimensions – Weight 26000kg
Accuracy – surface finish, cylindrical 2.5 Microns
Accuracy – surface finish, conical 20 Microns

STANDARD ACCESSORIES

Electrical equipment (one set)
Coolant System (one set)
Travelling workrest (70mm – 250mm)
Stationery workrest (100mm – 500mm)
Open-type steady rest (600mm – 950mm)
Centres (2 pieces)
Service Tools (one set)
Service Manual
Steel 4-Jaw Face Plate Chuck (1250mm)

OPTIONAL ACCESSORIES

Taper turning attachment
Thread indicator
Heavy duty closed rest (180 – 650mm)
Heavy duty open roller rest (600 – 1100mm)
Increased load capacity between centres to 25,000 kg
Please note that the information shown above is subject to change without notice.