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Home > Lathe > ROUNDTOP MACHINERY INDUSTRIES CO., LTD. > Specification


	ROUNDTOP MACHINERY INDUSTRIES CO., LTD. The fact that ROUNDTOP has had very rapid growth since our establishment has not changed our view that every day is an opportunity for even greater achievement. In 1979 we were producing only one model of conventional milling machine. Now we are one of the most diversified manufacturers producing vertical machining centers, horizontal machining centers, double column machining centers, Multi-Axis/5-Face Machining Centers, vertical turning centers, high speed machining centers and CNC lathes.
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JF-1740

Please visit our on-line digital catalogs for details.

Features

Hardened and ground bedways are made of high tensile cast iron to obtain high rigidity.
Broad slideways not only allow heavy cutting and retain accuracy even at a rapid traverse, but also give smooth and steady movement.
Gear-driven headstock with precision ground and hardened shave & gears ensures heavy cutting.
Headstock is equipped with Auto. Lubrication pump to ensure the smooth rotation and power transmission of gears and to extend the life expectancy of gears.
The main spindle is made of CR-MO alloy steel & supported at 3 points with 3 high precision taper roller bearings.

SPECIFICATION \ MODEL

JF-17 SERIES

JF-1730

JF-1740

JF-1760

Capacity

Swing Over Bed

430

Swing Over Gap

610

Swing Over Cross Slide

270

Distance Between Centers

800mm, 1100mm, 1700mm

Width Of Bed

300

Length Of Gap

150

Main Spindle

Spindle Nose

ASA-A1-6, D1-6

Spindle Bore

54mm, (2-1 / 8")

Taper Of Spindle

MT. No: 6

Spindle Speeds (60 Hz)

12 - step, 35 - 2000 rpm

Carriage

Cross Slide Travel

265

Compound Rest Travel

150

Tailstock

Quill Travel

150

Quill Diameter

Taper Of Center

MT # 4

Feed & Thread

Lead Screw

35 4TPI or Pitch 6 mm

Inch Thread No Range

44 Kinds 2 - 72

Metric Thread No Range

39 Kinds 0.2 - 14

D.P. No Range

DP 8 - 44

Module Pitches No Range

MP 0.3 - 3.5

Sliding Feeds (LONG)

0.03 - 0.85 mm (0.0012" - 0.034")

Surfacing Feeds (CROSS)

1 / 2 of Longitudinal feeds

Power

Main Drive Motor

5HP or (optional 7 - 1 / 2 HP)

Coolant Pump Motor

1 / 8 HP