Republic

Machine Tool Co.

American TurnmasterUltra Hi-Precision • High Accuracy Toolroom Lathe

Shown with some options

1

ATV-618-TR

Standard Tools

• Electronic Variable Speed drive system. 3 HP• Complete 3/60/220 volt electrics• Flood coolant pump and nozzle• Standard 5C collet closer(manual)• Inch/metric dual dials• Tailstock MT#2• Welded steel pedestal/cabinet• Work light• Test bar• Leveling pads

Solid one-piece enclosed headstock has high precision preloaded angular contact ball bearing spindle with 5C collet capacity. Infinitely variable spindle speeds from 0 - 4000 RPM

The specially designed bed ways are made of hardened and ground alloy steel that resist wear. The angular guide ways prevent chips from falling upon them. No slots or under cuts to wedge chips.

The carriage has three full bearing surface, on the top of the bed, and on the front and rear slides. This provides maximum rigidity for utmost accuracy. The ATV-618 TR pressure lubricates all three of these slides together.

Electronic vari-speed system with inverter infinitely variable spindle speeds can be instantly set from 0 to 4000 RPM while the spindle is running. The actual RPM is viewed in an easy to read digital display enclosed in the speed contol box.

Standard Equipment

Headstock Hardened and Ground Steel Bed Ways

Full Bearing Carriage EVS Control Box

ATV-618-TR Shown with some options

2

ATV-618-ET

ATV-618-ET Shown with some options

• Electronic threading with micro processing controls.• 2- Axis digital readout system• Complete 3/60/220 volt electrics with 110 volt controls and thermal overload protection.• Flood coolant pump and nozzle• Standard 5C collet closer (manual)• Inch/metric dual dials• Welded steel pedestal/cabinet• Work light• Test bar• Leveling pads• Tool setting gage• Drive dog plate• Headstock center

Standard Equipment

Standard Tools

The lever collet closer provides fast chucking. The lever control end of the closer assembly is balanced and rides on a precision bearing. Collet tension is instantly adjustable throught the rull range from light to heavy holding power without the use of tools.

The dual gearbox provides high accuracy english or metric thread cut-ting. The gearbox and lead screw operate only when used for threading operations. With standard change gears. Pitches are available from 275 to 2.7 mm. Optional change gears available at extra cost.

Independent Electronic Variable Feeds. The drive for the carriage is independent from the cross slide and provides complete freedom of operation. The feed can be changed instantly at any time. Simply turn a knob even when the tool is cutting without wasting valuable production time stopping the machine to shift gears.

The quick-acting tool post slide for threading is standard eqipment. T the end of the threading cut, the threading tool is instantly cleared from the work by the operator for the return of the carriage to the next cut. This is accomplished by means of the ball-handled lever actuating the tool post slide entirely independent of the tool post slide feed screw.

Faster Lever Collet Closer Dual Dials and Gearbox for Inch/Metric Threading

Independent Electric Variable Feeds(D.C.) Quick-Acting Tool Post Slide

3

ATV-900-SO

Standard Tools

The bed ways are solid hardened and ground alloy tool steel. There is no weakness of a center slot. There is one precision straight edge for aligning and anchor attachments. The bed is easy to keep clean, will resist wear, and chips cannot fail upon the angular guide ways.

The cross slide base provides the needed rigidity when forming, cutting off, or turning with the straight and taper turning slide attachment. The cross slide is easily operated by a hand lever. Two threaded feed stops are provided for fine adjustment of each tool position.

The unit provides variable speeds from 230 to 3,500 RPM. To change spindle speed, start the spindle and push the faster or slower button. This will increase or decrease the spindle speed. High and low Spindle speed setting are instantly available with a lever operated two speed motor.

The preloaded ball bearing turret head mounting, eliminates all play between the turret head and turret slide. The index pin is hardened and ground, and is mounted between hardened and ground preloaded roller bearings for ease in operation. The turret head and each of the six independent adjustable stops are automatically indexed to the next position.

Hardened and Ground Precision Steel Ways Double Tool Cross Slide

Spindle Drive Unit Six - Station Turret

• 5C lever type collect closer• Double tool cross slide• 6-station bed turret• Flood coolant with 12 liter tank capacity• 3 HP EVS variable speed drive with direct reading of RPM• Welded steel pedestal with storage compartment• Low voltage magnetric electric panel arranged for 3/60/220 VAC operation with thermal overload protection• Leveling bolts and pads

Standard Equipment

4

ATV-916-FL

ATV-910-FL Shown with some options

• Ball bearing lever type 5C collet closer• 1 HP EVS drive and complete 3/60/220v electrics• Floor pedestal with chip tray• Wide chip pan• Comfortable foot rest• Welded steel pedestal

Standard Equipment

Standard Tools

The high accuracy preloaded ball bearing spindle is mounted in the soild, one-piece totally enclosed headstock housing for maximum rigidity and sustained accuracy.

The lever control ended of the closer assembly is balanced and rides on a precision bearing. Movement to the left closes the collet, and to the right opens the collet.

The bed ways are solid hardened and ground steel. There is no weak-ness of a center slot. The bed is easy to keep clean, will resist wear, and chips cannot fall upon the angular slide ways.

Spindle speeds are provided of 750, 1,800 and 3,000 RPM through an endless V-belt and three step pullet arrangement. Spindle speeds are quickly changed. Raise the pulley and belt cover as shown. Move the lever horizontally to the extreme left. This will slide the motor pulley to the “belt release” position. Change belt to the pulley step desired and return the lever to the extreme right or “belt tight“ position.

High Accuracy Spindle Fast Lever Collet Chucking

Hardened and Precision Ground Steel Ways Quick Change Spindle Speeds

5

AT-914-HC

ATV-914-HC Shown with some options

• Ball bearing 5C lever type collet closer• Indexing 8-station turret with pre-loaded ball bearing head and cross feeding with adjustable stations. Indexing one station at a time and locking is via convenient hand lever.• 8-station turret drum type carriage stop• Welded steel pedestal with storage compartment and collet tray• Independent D.C. variable power feeds for turning, facing and boring• Built-in coolant system with integral sump and self-draining pan• Complete 3/60/220 volt electrics• Tool holders for turret: TH-01; TH-02; TH-03

Standard Equipment

Standard Tools

By moving the locking lever approximately 90° the precision ground, eight station turret, automatically indexes one space. Return lever to its original position and the turret is rigidity locked ready for the next operation. This automatic indexing feature saves time and can increase production.

The longitudinal movement of the carriage is controlled by the stop drum. There are eight adjustable stops for positioning the eight - sta-tion turret. Additional clearance in the bed has been provided so the operator can rapidly index the stop drum to desired position.

The independent electric variable feed for carriage and cross slide pro-vides complete freedom of operation. The rate of feed can be changed instantly at any time, even when the tool is cutting without wasting valuable production time stopping the machine to shift gears as is the case with slow conventional lathes.

Spindle rotation and speed range can quickly be selected by mov-ing the control levers shown in the illustration to the proper position. Placing the forward reverse lever at the center position automatically actuates the solenoid operated spindle brake.

Eight Station Turret Eight - Station Stop Drum

Independent Electronic Variable Feeds Speed Control Levers

6

ATV-916-TM

ATV-916-TM Shown with some options

• 5C lever type collet closer• Compound slide with T-slot• Tailstock• Flood coolant with 12 liter tank capacity• 5 Hp EVS variable speed drive with direct reading of RPM• Welded steel pedestal cabinet with storage compartment• Low voltage magnetic electric control panel arranged for 3/60/220 VAC operation, with thermal overload protection• Leveling bolts and pads

Standard Equipment

Standard Tools

Solid one-piece enclosed headstock has high precision preloaded angular contact ball bearing spindle with 5C collet capacity. Infinitely variable spindle speeds from 0 - 4000 RPM

The specially designed bed ways are made of hardened and ground alloy steel that resist wear. The angular guide ways prevent chips from falling upon them. No slots or under cuts to wedge chips.

The carriage has three full bearing surface, on the top of the bed, and on the front and rear slides. This provides maximum rigidity for utmost accuracy. The ATV-618 TR pressure lubricates all three of these slides together.

Electronic vari-speed system with inverter infinitely variable spindle speeds can be instantly set from 0 to 4000 RPM while the spindle is running. The actual RPM is viewed in an easy to read digital display enclosed in the speed contol box.

Headstock Hardened and Ground Steel Bed Ways

Full Bearing Carriage EVS Control Box

7

Optional Accessories

the recessing tool is used to perform recessing work,

back facing or chamfering operations in the same

setting of the work as other turret opertations . The

0.22”(5.5 mm) travel either side of center is governed

by adjustable stops. The recessing tool head takes the

0.63”(16 mm) diameter shank tool holders.

The Micrometer carriage stop is a useful accessory

when producing parts with exact shoulder lengths or

when facing to close tolerences. The indicator reads in

0.01mm increments. the micrometer reads in 0.01 mm

increments.

Long cylindrical work held between centers requires a

steady rest to prevent such work from springing away

from a cutting tool. A steady rest is also used when

there are machining operations to be performed on the

end of work which prohibits the use of tailstock center.

The steady rest has a maximum capacity of 2.99”(76mm)

The carriage length indicator permits full carriage travel

allowing for “close to spindle“ machining. The carriage

length indicator is a needed accessory when

producing parts to exact shoulder lengths or when

facing too close tolerances. The fully jeweled dial

indicator reads directly in 0.01 mm increments with a

range of 0.39”(10 mm). The long rod allows the

indicator to be extended to a distance of 6.5” (165 mm)

Quick - Acting Recessing Tool

Indicator Carriage Stop (Micrometer and indicator not included) Steady Rest

Carriage Length Indicator (Indicator not included)

8

Optional Accessories

The turning or boring of precision tapers is readily

accomplished by the use of a taper turning attachment.

the taper turning attacment is based on the sine bar

principle swiveling the guide bar from one end.

Graduations for setting guide bar are in degrees. The

taper turning attachment mounts directly on the back of

the lathe bed and is adjustable along the bed to suit the

work.

This transparent plastic chip and coolant shield is

optional equipment. The hinged section is adjustable to

left or right to suit work requirements. Extended

sections offer additional splash prevention.

Taper Turning Attachment Chip and Coolant Shield

When you have work that is small in diameter in

relation to length, it may spring away from the cutting

tool. In such cases, the follow rest can be applied to the

carriage and will assure you of accurate work.

The turret tool holder diameter 0.63” (16 mm) slide

travel 0.35”(9 mm)

Follow Rest Six Station Bed Turret

9

Optional Accessories

The steel body adjustable chuck has more accuracy

than the normal chuck, and the accuracy can be

adjusted. This chuck should be used with a back plate.

The available sizes are: 5”(127 mm) and 6.25”

(158.75 mm) diameter.

The steel body adjustable chuck has more accuracy

than the normal chuck, and the accuracy can be

adjusted. This chuck should be used with a back

plate. The available sizes are: 5”(127 mm) and

6.25”(158.75mm) diameter

Micro - Line is an affordable solution to basic machining

needs without sacrificing the performance you receive

from all ACU-RITE products. Along with the traditional

quality and support you have come to expect.

This steel body chuck is composed with 2 piece jaws,

and should be used with a back plate. The available

sizes are: 4” (101.6 mm), 5” (127 mm), and 6” (152.4

mm) diameter.

Chuck Adjust True - 3 Jaw

Chuck Adjust True - 6 Jaw ACU-RITE Micro-Line

Chuck (Steel Body) - 4 Jaw

10

Specifications

Table AT-618-TR AT-618-ET ATV-900-SOSwing over bed ways 11”(280 mm) 11”(280 mm) 9” (229 mm)Swing over carriage 9”(230 mm) 9”(230 mm) —

Swing over cross slide 6”(152 mm) 6”(152 mm) 3.75” (95 mm)

Distance between centers 18”(457 mm) 18”(457 mm) —

Length of bed 36”(915 mm) 36”(915 mm) 36”(915 mm)

HeadstockSpindle nose diameter 2.18”(55.6 mm) 2.18”(55.6 mm) —Spindle speeds, number Infinitely variable Infinitely variable Infinitely variableSpindle speed range 0 - 4,000 RPM 50 - 4,000 RPM 0 - 4,000 RPMSpindle nose, ID/OD, 5C 10° / 4° 10° / 4° 10° / 4°Spindle nose, outside taper 4° 4° —

Capacity5C Round collets 1.06”(27 mm) 1.06”(27 mm) 1.06(27 mm)

5C Hex collets .86”(22 mm) .86”(22 mm) .87”(22 mm)

5C Square collets .74”(19 mm) .74”(19 mm) —

with expanding collets 3”(76 mm) 3”(76 mm) 3”(76 mm)

with step chucks 1.06 to 6”(27 to 152 mm) 1.06 to 6”(27 to 152 mm) 1.06”(27 mm)

with jaw chucks 6”(150 mm) 6”(150 mm) 6”(150 mm)

Travels, Feeds and ThreadsCross slide travel 6”(152 mm) 6”(152 mm) —

Compound slide travel 3” (76 mm) 3” (76 mm) —

Quick - action compound slide travel 0.1”(2.54 mm) 0.1”(2.54 mm) —Carriage variable feed range .31” to 7”(8 to 178 mm) .18” to 4”(5 to 102 mm) —

Cross slide variable feed range .18” to 4”(5 to 102 mm) .31” to 7”(8 to 178 mm) —

Leadscrew, pitch x diameter 8 TPI x 1” (8 TPI x 25.4 mm) 8 TPI x 1” (8 TPI x 25.4 mm) —Inch thread range (36) 11 - 108 TPI 3.17 to 500 TPI (0.55 - 6.55 mm) —Metric thread range (36) .01” - .11”(0.275 - 2.7 mm) — —

TailstockTailstock spindle diameter 1.35”(35 mm) 1.35”(35 mm) —

Spindle taper No. 2 MT No. 2 MT —

Spindle travel 3.75”(95 mm) 3.75”(95 mm) —

ElectricsMain drive, EVS, 3/60/220 volt 3 HP(2.237 Kw) 3 HP(2.237 Kw) 3 HP(2.237 Kw)

Coolant pump motor 0.25 HP(0.19 Kw) 0.125 HP, 220V, 3 Ph —

D.C. feed motor 110 volt 75 watts — —

WeightNet weight, approximate 2310 lb (1050 kg) 2420 / 2640 lb (1100/1200 kg) 992 /1366 lb (450 /620 kg)

Machine Dimensions 73 x 30 x 67”(1850 x 750 x 1700 mm) 74 x 34 x 74” (2000 x 850 x 1900 mm)

Images used in this publication are for illustration purposes only, and may show optional features not included with the model. Republic Lagun is notresponsible for any printed or typographical errors. Specification are subject to change without notice. Weights and measurements are approximate and may vary. Please contact the plant or distributor for further information.

Note: Specifications are rounded up to the nearest inch. Millimeter measurements are precise in accuracy

ATV-910-FL AT-914-HC ATV-916-TM9” (229 mm) 13” (330 mm) 9” (229 mm)

— — 15” (380 mm)

— — —

— — —

10”(254 mm) 14”(355 mm) 36”(915 mm)

— 2.18”(55.5 mm) —Infinitely variable — Infinitely variable0 - 4,000 RPM 0 - 4,000 RPM 0 - 4,000 RPM

10° / 4° 10° / 2.18” / 10 RH (55.5 mm) 10° / 4°— — —

1.06(27 mm) 1.06(27 mm) 1.06”(27 mm)

.87”(22 mm) .87”(22 mm) .86”(22 mm)

.75” (19 mm) .75” (19 mm) .74”(19 mm)

3”(76 mm) 3”(76 mm) 3”(76 mm)

6”(152.4 mm) 1.06” - 6”(27 - 152.4 mm) 1.06 to 6”(27 to 152 mm)

5”(127 mm) — 6”(150 mm)

— 4.5”(114 mm) —

— — 4.25” - 5.5”(108 -140 mm)

— — —— .25” - 10”(6 - 250 mm) —

— 1.03” - 6.25”(9 - 160 mm) —

— — —— — —— — —

— — 1.35”(35 mm)

— — No. 2 MT

— — 3.75”(95 mm)

— — 5 HP EVS (3.7 Kw)

— .12 HP (0.1 Kw) .125 HP (0.9 Kw)

— 70 watts —

660 lb(300 kg) 2200 lb(1000 kg) 1000 lb (455 kg)

36 x 36 x 55”(900 x 900 x 1400 mm) 73 x 30 x 67”(1850 x 750 x 1700 mm) —

11

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