GOSAN MACHINERY CO., LTD

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MODEL

PRECISION ENGINE LATHE (Spindle bore86mm. 3-3/8inch)

Model: 1740, 1760, 1780, 2040, 2060, 2080

FEATURES:

˙Heavy duty geared head; hardened and ground gears.

˙82mm. 86mm. 3-3/8inch hole through spindles.

˙3-point supported spindle using 2 precision taper roller bearings and 1 ball bearing.

˙12 steps spindle speeds 20 – 1800 rpm. shift in geometric progression.

˙Quick-change universal gearbox for inch, metric, DP, MP, threading, and multiple thread.

˙Forced spray lubrication system used for headstock.

˙One shot lubrication pump supply oil cross slide and bed-ways.

˙Adjustable overload clutch in apron to ensure proper cutting load.

˙Cross slide screw permanently immersed in oil and supported by thrust bearing.

˙Induction hardened and precision ground bed-way.

˙One piece base for maximum rigidity.

BRIEF SPECIFICATION

BRIEF SPECIFICATION
MODEL			1740 1740V	1760 1760V	1780 1780V	2040 2040V	2060 2060V	2080 2080V
NOMINAL SIZE
Swing over Bed			440mm 17-5/16in			510mm 20in
Swing over Cross Slide			272mm 10-3/4in			342mm 13-1/2in
Height of Center			220mm 8-5/8in			255mm 10in
Distance Between Centers			1000mm 40in	1500mm 60in	2000mm 80in	1000mm 40in	1500mm 60in	2000mm 80in
BED
Width of Bedways			330mm 13in
Total Length of Bed			2000mm 78in	2510mm 98in	3020mm 118in	2000mm 78in	2510mm 98in	3020mm 118in
Gap Type	Swing over Gap		660mm 26in			730mm 28-3/4in
	Length of gap		300mm 11-3/4in			300mm 11-3/4in
	Width in front of face plate		190mm 7-1/2in			175mm 6-3/4in
SPINDLE
Spindle nose mounting			D1-8 CAMLOCK
Spindle bore			86mm 3-3/8in
Taper of spindle bore			M.T.#5
Number of spindle speeds			12
Range of spindle speeds			20-1800 R.P.M.
TOOL SLIDE
Total travel of cross slide			260mm 10-1/4in
Total travel of top slide			130mm 5-1/8in
Max. size cutting tool			25mm 1 in
TAIL STOCK
Total travel of tailstock barrel			150mm 6 in
Taper in tailstock barrel			M.T.#5
Diameter of barrel			75mm 3 in
THREADS
Lead screw diameter & pitch			Dia. 35mm 1-3/8in Pitch : 6mm 4 T.P.I.
Number of inch threads			48
Range of inch threads			2-72 TPI
Number of metric pitches			48
Range of metric pitches			0.2-14 mm
Number of Diametral pitches			24
Range of Diametral pitches			8-60 D.P.
Number of Module pitches			24
Range of Module pitches			0.2-3.5 M.P.
FEEDS
Feed rod diameter			25mm 1in
Number of feed change			36
Range of longitudinal feeds			0.06-2.00mm/rev. 0.0025-0.07in/rev.
Range of cross feeds			0.03-0.80mm/rev. 0.0010-0.03in/rev.
MOTOR
Main spindle motor		10HP 7kW
Coolant pump motor		1/8HP 0.1Kw
Machine net weight			1900kgs	2000 kgs	2200 kgs	2000 kgs	2100 kgs	2300 kgs

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