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Home > CNC 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.
	www.johnford.com.tw \| PRODUCT \| E-CATALOG \| VIDEO

ST-80	Please visit our on-line digital catalogs for details.
E-CATALOG \| VIDEO

Features

Operations of internal and external machining for turning, boring and facing both ends of medium or small size parts can be finished in one setting.
Save time on part loading, unloading and tool setting between two operations and increase productivities.
Second operation can be processed right after bar material being cut off.
Finished parts will be collected with programmable parts catcher (optional) automatically.
This lathe is one of the supreme efficient productive machines.

ITEM / MODEL		ST-80
		B	C	D
Swing Over Bed (mm)		920 (36.2")	920 (36.2")	920 (36.2")
Swing Over Cross Slide (mm)		700 (27.6")	700 (27.6")	700 (27.6")
Chuck Size (mm)		381 (15") (Std.) 450 (18") (Opt.)	510 (20") (Std.) 610 (24") (Opt.)	510 (20") (Std.) 610 (24") (Opt.)
Bar Capacity (mm)		116 (4.6")	139 (5.5")	165 (6.5")
Spindle Nose		A2-11	A2-15	A2-15
Spindle Bore (mm)		132.5 (5.2")	152 (6")	185 (7.3")
Spindle Speed, Step (s)		Auto 4 speeds	Auto 4 speeds	Auto 4 speeds
Spindle Speed Range (rpm)		2000	1500 (Std.) 1400 (Opt.)	1000
Spindle Motor (kW) (30 min/con.)		22 / 26 (Std.) 30 / 37 (Opt.)	30 / 37 (Std.) 37 / 45 (Opt.)	30 / 37 (Std.) 37 / 45 (Opt.)
Spindle Bearing Diameter (mm)		180 (7.1")	200 (7.9")	240 (9.4")
No. Of Tools		12
Cross Travel (X-Axis) (mm)		370 (14.6")
Y-Axis Travel (Opt.) (mm)		75 (3")
Longitudinal Travel (Z-Axis) (mm)		2000 / 2400 / 3050 (78.7" / 94.5" / 120.1") 4050 / 5050 / 6050 (159.4" / 198.8" / 238.2")
Rapid Traverse (m/min)		X:10 Y:10 Z:12
Tailstock Travel (mm)		1700 / 2100 / 2800 (66.9" / 82.7" / 110.2") 3750 / 4750 / 5750 (147.6" / 187" / 226.4")
Tailstock Quill Travel (mm)		150 (5.9")
Tailstock Quill Diameter (mm)		200 (7.9")
Tailstock Spindle Taper		MT #7
Servo Motor (X-Axis) (kW)		7
Servo Motor (Y-Axis) (Opt.) (kW)		3
Servo Motor (Z-Axis) (kW)		7
Bed Inclination		60
Weight (kg)		15000 / 16500 / 20100 (33000 / 36300 / 44220) 24100 / 28100 / 32100 (53020 / 61820 / 70620)	15300 / 16800 / 20300 (33660 / 36960 / 44660) 24200 / 28200 / 32200 (53240 / 62040 / 70840)	15500 / 17000 / 20500 (34100 / 37400 / 45100) 24500 / 28500 / 32500 (53900 / 62700 / 71500)
Machine Dimensions (mm)	W x H	2460 x 2870 (96.9" x 113")
	L	6852 / 7252 / 8052 / 9450 /10450 /11450 (269.8" / 285.5" / 317" / 372" / 411.4" / 450.8")

ITEM / MODEL		ST-80
		BH	CH	DH
Swing Over Bed (mm)		1000 (39.4")	1000 (39.4")	1000 (39.4")
Swing Over Cross Slide (mm)		800 (31.5")	800 (31.5")	800 (31.5")
Chuck Size (mm)		381 (15") (Std.) 450 (18") (Opt.)	510 (20") (Std.) 610 (24") (Opt.)	510 (20") (Std.) 610 (24") (Opt.)
Bar Capacity (mm)		116 (4.6")	139 (5.5")	165 (6.5")
Spindle Nose		A2-11	A2-15	A2-15
Spindle Bore (mm)		132.5 (5.2")	152 (6")	185 (7.3")
Spindle Speed, Step (s)		Auto 4 speeds	Auto 4 speeds	Auto 4 speeds
Spindle Speed Range (rpm)		2000	1500 (Std.) 1400 (Opt.)	1000
Spindle Motor (kW) (30 min/con.)		22 / 26 (Std.) 30 / 37 (Opt.)	30 / 37 (Std.) 37 / 45 (Opt.)	30 / 37 (Std.) 37 / 45 (Opt.)
Spindle Bearing Diameter (mm)		180 (7")	200 (7.9")	240 (9.5")
No. Of Tools		12
Cross Travel (X-Axis) (mm)		420 (16.5")
Y-Axis Travel (Opt.) (mm)		75 (3")
Longitudinal Travel (Z-Axis) (mm)		2000 / 2400 / 3050 (78.7" / 94.5" / 120") 4050 / 5050 / 6050 (159.4" / 198.8" / 238.2")
Rapid Traverse (m/min)		X: 10 Y:10 Z:12
Tailstock Travel (mm)		1700 / 2100 / 2800 (66.9" / 82.7" / 110.2") 3750 / 4750 / 5750 (147.6" / 187" / 226.4")
Tailstock Quill Travel (mm)		150 (5.9")
Tailstock Quill Diameter (mm)		200 (7.9")
Tailstock Spindle Taper (kW)		MT #7
Servo Motor (X-Axis) (kW)		7
Servo Motor (Y-Axis) (Opt.) (kW)		3
Servo Motor (Z-Axis) (kW)		7
Bed Inclination		60
Weight (kg)		15100 / 16600 / 20200 (33220 / 36520 / 44440) 24200 / 28200 / 32200 (53240 / 62040 / 70840)	15400 / 16900 / 20400 (33880 / 37180 / 44880) 24400 / 28400 / 32400 (53680 / 62480 / 71280)	15600 / 17100 / 20600 (34320 / 37620 / 45320) 24600 / 28600 / 32600 (54120 / 62920 / 71720)
Machine Dimensions (mm)	W x H	2460 x 2870 (96.9" x 113")
	L	6852 / 7252 / 8052 / 9450 /10450 /11450 (269.8" / 285.5" / 317" / 372" / 411.4" / 450.8")

ITEM / MODEL		ST-80
		BX	CX	DX
Swing Over Bed (mm)		1200 (47.2")	1200 (47.2")	1200 (47.2")
Swing Over Cross Slide (mm)		1000 (39.4")	1000 (39.4")	1000 (39.4")
Chuck Size (mm)		381 (15") (Std.) 450 (18") (Opt.)	510 (20") (Std.) 610 (24") (Opt.)	510 (20") (Std.) 610 (24") (Opt.)
Bar Capacity (mm)		116 (4.6")	139 (5.5")	165 (6.5")
Spindle Nose		A2-11	A2-15	A2-15
Spindle Bore (mm)		132.5 (5.2")	152 (6")	185 (7.3")
Spindle Speed, step (s)		Auto 4 speeds	Auto 4 speeds	Auto 4 speeds
Spindle Speed range		2000	1500 (Std.) 1400 (Opt.)	1000
Spindle Motor (kW) (30 min/con.)		22 / 26 (Std.) 30 / 37 (Opt.)	30 / 37 (Std.) 37 / 45 (Opt.)	30 / 37 (Std.) 37 / 45 (Opt.)
Spindle Bearing Diameter (mm)		180 (7.1")	200 (7.9")	240 (9.4")
No. Of Tools		12
Cross Travel (X-Axis) (mm)		520 (20.5")
Y-Axis Travel (Opt.) (mm)		75 (3")
Longitudinal Travel (Z-Axis) (mm)		2000 / 2400 / 3050 (78.7" / 94.5" / 120.1") 4050 / 5050 / 6050 (159.4" / 198.8" / 238.2")
Rapid Traverse (m/min)		X:10 Y:10 Z:10
Tailstock Travel (mm)		1700 / 2100 / 2800 (66.9" / 82.7" / 110.2") 3750 / 4750 / 5750 (147.6" / 187" / 226.4")
Tailstock Quill Travel (mm)		150 (5.9")
Tailstock Quill Diameter (mm)		200 (7.9")
Tailstock Spindle Taper		MT #7
Servo Motor (X-Axis)		7
Servo Motor (Y-Axis) (Opt.)		3
Servo Motor (Z-Axis)		7
Bed Inclination		60
Weight (kg)		15200 / 16700 / 20300 (33440 / 36740 / 44660) 24300 / 28300 / 32300 (53460 / 62260 / 71060)	15500 / 17000 / 20600 (34100 / 37400 / 45320) 24300 / 28300 / 32300 (53460 / 62260 / 71060)	15700 / 17200 / 20700 (34540 / 37840 / 45540) 24700 / 28700 / 32300 (54340 / 63140 / 71060)
Machine Dimensions (mm)	W x H	2715 x 3105 (106.9" x 122.2") (for ST-80) 2645 x 3175 (104.1" x 125") (for ST-100 / 130) 2685 x 3175 (105.7" x 125") (for ST-160 / 240)
	L	6852 / 7252 / 8052 / 9450 /10450 /11450 (269.8" / 285.5" / 317" / 372" / 411.4" / 450.8")