STF-Series

Models: STF-4440, STF-5040, STF-5540, STF-604
Swing44 – 60 in.
Centers40 in.
Bore6, 9, 12 & 15 in.
Bed Width32 in.

Overview

The extra heavy duty big bore T-lathe (Facing Lathe) has swings of 40”, 50”, 56” , 60” and spindle bores of 6”, 9”, 12”, and 15” diameter. It has no tailstock. The center distance is 40” The machine bed is 32” wide. It is designed specifically for large diameter but short length work pieces.

  • Swing over bedways: 40”, 50”, 56” and 60”.
  • Distance between centers: 40″
  • Spindle bore: 6″ standard, 9″, 12″, 15″ optional
  • Spindle motor: 15 hp, 30 hp, 40 hp, larger hp available
  • Bed width: 32″
  • It has no tailstock
  • M code 4 step auto change speeds

Features

Three Points Support Headstock Spindle

The headstock casting is designed with one ball bearing and two tapered roller bearings supporting the full length of the spindle shaft.

Spindle bore sizes are available in 6”, 9”’ 12” , 15” and 20” Double chucks are available as options.

Gears and shafts are made from hardened and ground alloy steel, the spindle is made from forged, chrome alloy material.

One Piece Casting Bed/Base

The oversized 32” wide bedways are induction hardened and ground for long lasting accuracy.

One piece casting bedways and base offer rigidity and stiffness to the entire machine to enhance heavy cutting

Center Mount Ball Screw

The ball screw that drives the carriage and cross slide is mounted between the bed ways in the center of the bed. Unlike the conventional design with the ball screw installed in front of the bed, this design disperse the driving force equally between the two sets of bedways and deliver a more positive force along the Z axis.

Large Selections Of Tool Posts

There are different types of optional turret tool posts to be mounted on the cross slide. There are 4 way, 6 way, 8, 12 positions hydraulic or motorized tool holding devices for different works.

Specs / Models

Dimensions STF-4440 STF-5040 STF-5540 STF-6040
Maximum Swing Over Bed44.09 in.
(1120 mm)
51.97 in.
(1320 mm)
55.18 in.
(1401 mm)
59.06 in.
(1500 mm)
Swing Over Cross Slide27.56
(700 mm)
35.43 in.
(900 mm)
35.43 in.
(900 mm)
39.37 in.
(1000 mm)
Spindle Bore6 in. (152 mm)
9 in. (229 mm)
12 in. (305 mm)
15 in. (381 mm)
6 in. (152 mm)
9 in. (229 mm)
12 in. (305 mm)
15 in. (381 mm)
6 in. (152 mm)
9 in. (229 mm)
12 in. (305 mm)
15 in. (381 mm)
6 in. (152 mm)
9 in. (229 mm)
12 in. (305 mm)
15 in. (381 mm)
Main Motor30 hp (Std.)
(22.37 Kw)
40 hp & 60 hp
(Opt.) (29.82 Kw & 44.74 Kw)
30 hp (Std.)
(22.37 Kw)
40 hp & 60 hp
(Opt.) (29.82 Kw & 44.74 Kw)
30 hp (Std.)
(22.37 Kw)
40 hp & 60 hp
(Opt.) (29.82 Kw & 44.74 Kw)
30 hp (Std.)
(22.37 Kw)
40 hp & 60 hp
(Opt.) (29.82 Kw & 44.74 Kw)
CNC ControlFANUC Oi-TDFANUC Oi-TDFANUC Oi-TDFANUC Oi-TD
Bed STF-4440 STF-5040 STF-5540 STF-6040
Bed Way Construction2 V, 2 Flat Ways2 V, 2 Flat Ways2 V, 2 Flat Ways2 V, 2 Flat Ways
Width of Bed31.88 in.
(810mm)
31.88 in.
(810mm)
31.88 in.
(810mm)
31.88 in.
(810mm)
Length of Bed135.83 in.
(3450 mm)
135.83 in.
(3450 mm)
127.95 in
(3250 mm)
135.83 in.
(3450 mm)
Travel STF-4440 STF-5040 STF-5540 STF-6040
X-Axis Travel
(Varies by different turrets installed)
19.69 in.
(500 mm)
19.69 in.
(500 mm)
19.69 in.
(500 mm)
19.69 in.
(500 mm)
Z-Axis Travel39.37 in.
(1000 mm)
39.37 in. (1000 mm)39.37 in.
(1000 mm)
39.37 in.
(1000 mm)
X-Axis Ball Screw Diameter1.57 in.
(40 mm)
1.57 in.
(40 mm)
1.57 in.
(40 mm)
1.57 in.
(40 mm)
Z-Axis Ball Screw Diameter2.48 in.
(63 mm)
2.48 in.
(63 mm)
2.48 in.
(63 mm)
2.48 in.
(63 mm)
Motor STF-4440 STF-5040 STF-5540 STF-6040
Spindle Motor30 hp (STD Fanuc Alpha 22)
22.37 Kw)
Opt: 40 hp or 60 hp ( 29.82 Kw & 44.74 Kw)
30 hp (STD Fanuc Alpha 22)
22.37 Kw)
Opt: 40 hp or 60 hp ( 29.82 Kw & 44.74 Kw)
30 hp (STD Fanuc Alpha 22)
22.37 Kw)
Opt: 40 hp or 60 hp ( 29.82 Kw & 44.74 Kw)
30 hp (STD Fanuc Alpha 22)
(22.37 Kw (STD Fanuc Alpha 22)
Opt: 40 hp or 60 hp (29.82 Kw & 44.74 Kw)
X-Axis Servo Motor4 hp
(3 kw)
4 hp
(3 kw)
4 hp
(3 kw)
4 hp
(2.98 kw)
Z-Axis Servo Motor5 hp
(3.72 kw)
5 hp
(3.72 kw)
5 hp
(3.72 kw)
5 hp
(3.72 kw)
Hydraulic Pump2 hp
(1.5 kw)
2 hp
(1.5 kw)
2 hp
(1.5 kw)
2 hp
(1.5 kw)
Coolant Pump1.7 hp
(1.27 kw)
1.7 hp
(1.27 kw)
1.7 hp
(1.27 kw)
1.7 hp
(1.27 kw)
Machine Weight STF-4440 STF-5040 STF-5540 STF-6040
Weight25,960 lbs.
(11,775 kg)
27,500 lbs.
(12,474 kg)
29,040 lbs.
(13,172 kg)
30,140 lbs.
(13,671 kg)
Dimensions STF-4440 STF-5040 STF-5540 STF-6040
Length
(Length with Chip Conveyor)
15.45 ft.
(4.70 M)
15.45 ft.
(4.70 M)
15.45 ft.
(4.70 M)
17.05 ft.
(5.19 M)
Width8.26 ft.
(2.51 M)
8.26 ft.
(2.51 M)
8.26 ft.
(2.51 M)
8.78 ft.
(2.67 M)
Height7.5 ft.
(2.28 M)
7.5 ft.
(2.28 M)
7.5 ft.
(2.28 M)
7.67 ft.
(2.33 M)

Accessories

Standard Accessories

  • Controller: Fanuc Oi TF
  • Flat belt conveyor
  • Spindle 4-steps speed auto change
  • X/Z axes auto lubrication system
  • Coolant system
  • X/Z-axes with Turcite-B on slideways
  • X/Z-axes C3 ballscrew
  • Manual tailstock, MT 6
  • Steady rest 16”
  • Full enclosure splash guard
  • Heat exchanger
  • Electronic handwheel (MPG)
  • Work lamp

Optional Accessories

  • 4 jaw chuck, different sizes
  • 3 jaw chuck, different sizes
  • 3 jaw hydraulic chuck, different sizes
  • Face plate with 4 jaws, different sizes
  • Steady rest , over 16”, different sizes
  • Follow rests, different sizes
  • Boring attachment for bar dia. 120mm
  • Spindle chiller
  • Rear chuck Adapter
  • Hydraulic turret 4-way turret
  • Hydraulic turret V-8 tools, includes boring toolholder 3 pcs, facing toolholder 1 pc and turret sleeve
  • Hydraulic turret V-12 tools, includes boring toolholder 3 pcs, facing toolholder 1 pc and turret sleeve

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