Johnford GT Series โ€“ Large Horizontal Slant Bed Turning Centers

Machines in the Johnford GT Series of eight large, heavy duty horizontal slant bed turning centers feature a one piece, 45หš slant bed torque tube design. The torque tube, or hole cast through the center of the slant bed, maximizes bed rigidity and dissipates heat. For optimum strength and accuracy, the machines are cast from rigid Meehanite iron.

The machine saddle casting is inclined at 60หš to allow for the larger swing and capacities. Swing over the machine bed is 61โ€ณ (1,549 mm) and swing over the cross slide is 50โ€ณ (1270 mm). Distance between centers range from 40โ€ณ (1,016 mm) to 240โ€ณ (6,096 mm). All machines feature a single 12-tool turret and C-axis is optional.

Square box ways provide rigidity for heavy-duty turning. Hand-scraped sliding surfaces are coated with Turcite B to all enable high rapid traverse rates and accurate positioning. Pre-tensioned double-nut ballscrews minimize thermal growth.

A wide variety of spindles is available, with power ranging from 50 hp to 100 hp delivered through a 4-speed gearbox. The spindle structure is mounted with double row roller bearings in conjunction with angular contact ball bearings for high rigidity and accuracy. The spindle quill inner and outer linings are precision ground for fit with the spindle, to provide extreme concentricity and accuracy. A 24โ€ณ 3-jaw chuck is standard, as is a programmable hydraulic tailstock body and quill. Larger chucks, high-pressure coolant systems, tool presetting systems, radial and axial live tooling heads, and 12-station live tooling with a full contouring C axis are among the available options that enable the machines to be tailored to specific production needs.

Specifications

Item / Model

Swing Over Bed (in.)

61

61

61

61

61

61

61

61

Swing Over Cross Slide (in.)

50

50

50

50

50

50

50

50

Center Distance (in.)

40

60

80

100

120

160

200

240

Spindle Type

C,D,E,F,G,H,I,J,K

C,D,E,F,G,H,I,J,K

C,D,E,F,G,H,I,J,K

C,D,E,F,G,H,I,J,K

C,D,E,F,G,H,I,J,K

C,D,E,F,G,H,I,J,K

C,D,E,F,G,H,I,J,K

C,D,E,F,G,H,I,J,K

Turret Tools

12

12

12

12

12

12

12

12

Spindle HP

50 / 60 / 100

50 / 60 / 100

50 / 60 / 100

50 / 60 / 100

50 / 60 / 100

50 / 60 / 100

50 / 60 / 100

50 / 60 / 100

Spindle Drive

4 Speed Gear Box

4 Speed Gear Box

4 Speed Gear Box

4 Speed Gear Box

4 Speed Gear Box

4 Speed Gear Box

4 Speed Gear Box

4 Speed Gear Box

C Axis

Optional

Optional

Optional

Optional

Optional

Optional

Optional

Optional

Y Axis

No

No

No

No

No

No

No

No

Sub Spindle

No

No

No

No

No

No

No

No

Twin Turrets

No

No

No

No

No

No

No

No

Weight (lbs.)

40,000

45,000

50,000

55,000

60,000

70,000

80,000

90,000

A (A2-11)

4.5โ€

4.01โ€

3000

6.3โ€

12โ€~18โ€ hyd.

B (A2-11)

5.2โ€

4.56โ€

2000

7.1โ€

15โ€~24โ€ hyd.

C (A2-15)

5.98โ€

5.47โ€

1500

7.87โ€

20โ€~32โ€ hyd.

D (A2-15

7.28โ€

6.5โ€

1000

9.45โ€

20โ€~32โ€ hyd.

E (A2-15)

9.29โ€

8โ€

800

11.02โ€

24โ€~40โ€ hyd.

F (A2-20)

10โ€

โ€”-

500

12.5โ€

24โ€~40โ€ man.

G (A2-20)

12.5โ€

โ€”-

500

14โ€

24โ€~40โ€ man.

H (A2-20)

14โ€

โ€”-

400

16โ€

28โ€~40โ€ man.

I (A2-28

16โ€

โ€”-

350

18.5โ€

32โ€~48โ€ man.

J (A2-28)

21โ€

โ€”-

250

24โ€

32โ€~48โ€ man.

K(A2-32)

24โ€

โ€”-

200

27โ€

36โ€~48โ€ man.