Shamrock Machinery Company
                            3200 North Freeway                                 Tel 713-699-3355 Fax 713-699-3389
                            Houston, Texas, USA 77009         email: sales@shamrockmachinery.com

The new Ryazan heavy-duty

four-guideway CNC lathe

The CNC engine lathe model RT950F4 is intended for rough and finish machining of rotary type workpieces (shafts, axes, drums, disks) made of cast iron and steel. This lathe has application in machine-building, ferrous metallurgy and shipbuilding.

Operations performed by the CNC lathe model RT950F4-6:

The lathe is equipped with a CNC system that allows both manual (with the carriage being manually controlled) and automatic workpiece machining (according to the program).

Cross feed drive 1pc.

Maximum workpiece diameter:

- set over bed 1880

- set over carriage 1500

- in the steady rest* 300…600*

- in the open rest* 500…1500*

Center height, mm 1085

Bed width, mm 1350

Maximum workpiece length, mm 6000

Maximum weight of a workpiece and steady rest, kg 40000

Cutting tool height, mm 40…50

Maximal working element travel, with the cutting tool, mm

- longitudinal carriage 6000

- cross slide 615

Spindle speed range, rev/min 1…250**

Travel discreteness, micron 1

Number of controlled axes 2 (3)

Rapid travel speed of the carriage, mm/min

- longitudinal 4000

- cross 2000

Max. spindle torque, kNm 33

Main travel drive power, kW (S1/S6) 100/130

Machine foot print, mm:

- length 15000

- width 5200

- height 3000

Total power of electrical motors, kW 110

Lathe weight (approximate, with the apart equipment), kg 46400

Max. workpiece diameter:

- set over bed 74’’

- set over carriage 59’’

- in the steady rest 12…23.6’’ *

- in the open rest 23,6…59’’ *

Center height, inch 42,7"

Bed width, inch 53,1 in

Maximum workpiece length, inch 236,2"

Maximum weight of a workpiece and steady rest, lbs 77000 lbs

Height of the set cutting tool 1,5…2’’

Max. travel of the working element with the cutting tool

- Longitudinal carriage 236’’

- Cross slide 37,4’’

Spindle rotation frequency range, rev/min 1…250*

Travel discreteness, mkm 1

Number of controlled axes 2 (3)

Rapid travel speed along the axes, inches/min

Longitudinal 157,5

Cross 78,7

Max. spindle torque, ft Lbs 24346

Main travel drive power S1(S6), HP 175/225

Machine foot print, inches

length 590

width 120

height 98,4

Total power of electrical motors, HP 147

Lathe weight (approximately, with the apart equipment), LBS 102000

The cast-iron bed consists of three joint segments: the under-headstock pedestal (L = 1990 mm), and few bed sections, available lengths are L = 5200 mm, L = 3900 mm.

The bed has three flat horizontal guideways: two front attached guideways made of hardened steel, and the back guideway made of cast iron. The front guideways are intended for the carriage. The back one is for the rests and the tailstock. The bed is pass-through, so the carriage is allowed to travel along the full bed length.

To compensate for the overturning moment caused by the cutting force there is an extra hardened steel guide-way positioned in the lower part of the bed.

The spindle stock is mounted on the head part of the bed. The main drive (N = 100 kWt, nnom = 1150 rev/min with controlled frequency) is connected with a main drive shaft of the spindle stock through a flexible sleeve-bolt coupling.

The spindle stock has three ranges. Speed is effected sleeplessly due to the changes of motor speed. Range switch is shifted hydraulically with the control from the operator desk. The maximum spindle speeds for the 1^st, 2^nd, and 3^rd range are 42 rev/min, 138 rev/min, and 250 rev/min, respectively.

The circular feedback encoder (1200 imp/rev) provides feedback relative to the spindle position and allows threading operations. The encoder is mounted on the back part of the spindle.

The lathe is equipped with a tail stock of 40-ton carrying capacity.

The tail stock has a prismatic quill with a built-in movable spindle. The quill travel is controlled by a worm gearbox with an electric drive. The quill drive mechanism is equipped with a visual control device to check the tightening force of a workpiece machined by the center. Manual quill travel is also available.

The housing of the tailstock is mounted on the bridge. The tail stock design allows it to move perpendicular to the guideways. The mechanism of clamping the bridge to the guideways is provided by a hydraulic drive.

The carriage of the lathe is a cross type design. The lower part of the carriage moves longitudinally along the bed guideways. The upper part of the carriage (the cross-slide) moves across the carriage guideways. The cutting tool slide (turret slide) is mounted on top of the cross-slide. The turret slide travels along the cross-slide guideways in manual mode. Workpiece machining diameter may be selected by moving the turret slide.

The high-torque motor (3000 rev/min) sets into motion the longitudinal feed drive by means of the Transmissions worm reducer.

The Heidenhein transducer of linear travel is mounted on the bed. It is meant as a feedback encoder of the longitudinal coordinate. An additional bearing which contacts the lower inclined guideway is mounted in the lower part of the longitudinal feed-drive housing.

The cross-slide travels through a precision worm reducer and a ball-screw pair 63х10, by means of the high-torque motor. Combined radial-thrust bearings are used as screw bearings. A rotary feedback encoder (2500 imp/rev) is mounted on the screw.

The slide travels manually across the lathe on a screw with a 50х3 trapezoid thread.

The operator area is built on the side platforms of the carriage housing. It provides convenient lathe control and observation of operations.

The lathe RT950F3 optionally is equipped with a V8-position turret head + live tools with a horizontal axis. – Included in present offer replacing of H4 turret head.

- 4 jaw chuck 1600 mm (63");

- set of tooling blocks 2+2;

- Stationary center M100 + intermediate bush + Morse 6 center;

- Motor – 100 kW;

- steady rest 300…600 mm (11.81 – 23.6");

- open rest 500…1500 mm (19.68 – 59.05");

- C-axis capability;

- V8 turret head + live tooling;

- set of leveling pads;

- chip conveyor ready (machine will be ready to install chip conveyor at Customer site);

- Automatic C-style hydraulic steady 100 – 500mm (3.93 – 19.68");

- Chip conveyor;

- Boring bar attachment;

- Tailstock with load pressure monitor;

- Hydraulic self centering chuck;