Republic Lagun | Rotary Grinders

Rotary Grinder Republic 21/40Rough and Finish Grinding

The Republic Rotary Surface Grinder is designed for ease of set up and versatility for rough and finish grinding of parts. Easy access allows both small amounts, and production amounts to be ground quickly and accurately.

STANDARD EQUIPMENT

Abrasive segment holder for Trapezoidal segments
Mounting for grinding wheel
Puller for removing grinding wheel
Mandrel for static balancing of grinding wheel
Plate for static balancing of grinding wheel
Dressing attachment for segmental grinding wheel
Segmental grinding wheel guard
Segment dressers (Star Design)
Electromagnetic chuck with magnetizer and demagnetizing installed
Counter current wheel braking
Automatic cycle programmer in-feed position numerical display
Table cleaning scrapper
Coolant tank of 211 gallon capacity with sediment trap
Coolant pump and piping
Grease gun
Work lamp
Clamping straps for transport
Service wrenches
Foundation bolts
Service manual
Equipped with 3/60/220 or 440V electrics (Specify)

ELECTROMAGNETIC TABLE - Republic rotary grinders come standard with a forty-inch (40") diameter electromagnetic chuck. With a work height of 14" under new grinding wheel segments and 17" under used segments, this allows a large capacity to meet your requirements. Table speeds are 0, 9, 12,17rpm.

GRINDING WHEEL - Republic rotary grinders are equipped with a twenty-one inch (21") diameter grinding wheel. Segment pockets are designed to accept all standard wheel segments. This grinding wheel head has rapid up and down, automatic feed or manual feed.

CONTROL PANEL/DRESSER - For operator convenience, the controls are mounted on a control panel mounted to the right of the access door. Functions that are controlled from the operator's panel are: Start/Stop of the grinding wheel, drive unit of the grinding table, rapid movement of the grinding wheel, control of the electro-magnetic chuck and coolant system. A main motor amp-meter is mounted on the headstock. The wheel dresser unit is placed next to the main motor and uses standard "star-style" dressers.

COOLANT SYSTEM - Republic Rotary Grinders are designed as a dry base machine with the coolant discharge located at the rear of the machine. This discharge can be used with a 210 gallon coolant tank, or connected to a central cooling system.

MAIN SPINDLE - A forty (40 horsepower main spindle motor is supplied as standard equipment. This motor is dual voltage and will be set to each customer's electrical requirements. (220/440/3/60). Other voltages may require a transformer. (Option).

BASE AND COLUMN - The stress relieved cast-iron components are manufactured with rigid box high-grade construction generously ribbed for strength. One flat and one "V" way provide bearing surface.
ELECTRICAL CONTROL - All starters and protective relays for the motors are mounted in a steel cabinet on the back of the machine, completely wired to motors and push buttons. Just one connection to the power circuit is necessary for installation. The wheel motor has reduced voltage (Star Delta) starting and plugging, and full voltage running on 60 cycles, 3-phase current. Depressing the "Stop" button will quickly bring the spindle to a complete halt. A disconnect switch is included, interlocked with the door of the control cabinet. Pushbutton circuits are 115-volt and clearly marked for quick, easy identification. An ammeter for the main motor is conveniently located for ease of operation. This is a useful guide for maximum rate of feed, and shows when wheel dressing is necessary.

LUBRICATION - The upper and lower spindle bearings are grease-lubricated periodically. Lubrication of the table ways, feed mechanism, lead screw and rotary table is continuous and automatic. The head ways and in-feed mechanism are lubricated from a semiautomatic pushbutton. Table rotation gears operate continuously in oil, in a casing sealed against dirt and water.

Rotary Grinder Republic 21/40Rough and Finish Grinding

SPECIFICATION	Model: 21/40
Electromagnetic chuck diameter	39.3” (1000 mm)
Max diameter of ground surface	39.3” (1000 mm)
Max. height of ground work-piece (for new segments)	17.7” (450 mm)
Max. distance from segment holder to electromagnetic chuck upper surface	18.8” (480 mm)
Max. table slide shift	20.8” (530 mm)
Table slide shift rate of movement	0.16” ipm (4 mm/min)
Table rotational speed (step change)	0, 9, 12, 17, 30 rpm
In-feed minimal step	.00004” ipm (0.001 mm)
Continuous automatic in-feed (semi automatic work)	.003” - .039” ipm (0.1-1.0mm/rev)
Step automatic in-feed range for one table revolution Semi-automatic cycle	.0005” - .0031” ipm (0.0015-0.08mm/rev)
Automatic cycle	.000012” - .0018” ipm (0.0003-0.03mm/rev)
Continuous automatic in-feed rate (automatic cycle)	.0007”-.39” ipm (0.02-1.0mm/rev)
Max. grinding allowance at automatic in-feed	Unlimited
Spark-out time (automatic cycle)	0 ~ 40 sec.
Segmental Grinding Wheel (trapezoidal segments):
External Diameter	20.86” (530mm)
Internal Diameter	16.73” (425mm)
Abrasive segment size	3.97/3.34x1.37x5.90” (100/85x35x150mm)
Number of segments	10
Max. weight of ground work-piece	1,763 lbs (800 kg.)
Electric motor –wheel drive motor	40 HP (30 kW)
Total power installed	56 kVA
Coolant system flow rate	53 gl/min (200 l/min)
Overall dimensions (L x W x H)	136” x 93” x 104” (3450 x 2360 x 2630 mm)
Machine weight	15,432 lbs (7000 kg)

Rotary Grinder Republic 21/40Rough and Finish Grinding

Cylindrical Grinder GER C 450Multi-Function Cylindrical Grinders

SPECIFICATION	RCG-ST-1620	RCG-ST-1640	RCG-ST-1660
Distance between centers	23.6” (600 mm)	39.4” (1000 mm)	59” (1500 mm)
Swivel over table	16.5” (420 mm)	16.5” (420 mm)	16.5” (420 mm)
Max. Load of Centers	440 lbs. (200 kg.)	440 lbs. (200 kg.)	440 lbs. (200 kg.)
Max. External Grinding Diameter	15” (380 mm)	15” (380 mm)	15” (380 mm)
Swivel angle	± 30°	± 30°	± 30°
Manual Distance	6.3” (160 mm)	6.3” (160 mm)	6.3” (160 mm)
Auto Rapid Advance	1.6” (40 mm)	1.6” (40 mm)	1.6” (40 mm)
Sliding Seat Supplementary Displacement	95 [total 10” (255 mm)]	95 [total 10” (255 mm)]	95 [total 10” (255 mm)]
Min. Setting Unit- graduation	0.0001”” (0.0025 mm)	0.0001”” (0.0025 mm)	0.0001”” (0.0025 mm)
One Turn of Handwheel feed (graduation)	.08” (0.0002 mm) [2 mm (0.005 mm)]	.08” (0.0002 mm) [2 mm (0.005 mm)]	.08” (0.0002 mm) [2 mm (0.005 mm)]
Micrometric feed	0.00004” (0.001 mm)	0.00004” (0.001 mm)	0.00004” (0.001 mm)
Handwheel Straight Infeed	0~0.01” (0~0.35 mm)	0~0.01” (0~0.35 mm)	0~0.01” (0~0.35 mm)
O.D. x Width x I.D.	14”x 2”x 5” (355 x 50 x 127 mm)	14”x 2”x 5” (355 x 50 x 127 mm)	14”x 2”x 5” (355 x 50 x 127 mm)
Speeds (belt type) r.p.m	1,783 rpm	1,940 rpm	1,940 rpm
Swivel Angle	120° (+90° -30°)	120° (+90° -30°)	120° (+90° -30°)
Center Taper	MT 4	MT 4	MT 4
Spindle Speeds (variable) r.p.m	16~450 rpm	16~450 rpm	16~450 rpm
Max. Load of Spindle (tool holder included)	77 lbs (Max length: 6”) [35 Kgs (Max. length: 150 mm)]	77 lbs (Max length: 6”) [35 Kgs (Max. length: 150 mm)]	77 lbs (Max length: 6”) [35 Kgs (Max. length: 150 mm)]
Taper Center	MT 4	MT 4	MT 4
Stroke	1” (25 mm)	1” (25 mm)	1” (25 mm)
Swivel Angle	10°	8°	8°
Traverse Speed	2”~157.5”/min (50~4000 mm/min)	2”~157.5”/min (50~4000 mm/min)	2”~157.5”/min (50~4000 mm/min)
Auto. Reciprocate Min. Stroke	0.12” (3 mm)	0.12” (3 mm)	0.12” (3 mm)
Feed of one turn of Handwheel (2 step)	0.8” (0.08”) [20 mm (2 mm)]	0.8” (0.08”) [20 mm (2 mm)]	0.8” (0.08”) [20 mm (2 mm)]
Wheel Spindle	5 HP (3.75 kW) (4 P)	5 HP (3.75 kW) (4 P)	5 HP (3.75 kW) (4 P)
Workhead Spindle	1.75 HP (1.3 kW) (Servomotor)	1.75 HP (1.3 kW) (Servomotor)	1.75 HP (1.3 kW) (Servomotor)
Hydraulic Pump	1 HP (0.75 Kw) (6 P)	1 HP (0.75 Kw) (6 P)	1 HP (0.75 Kw) (6 P)
Wheel Spindle Lubrication Pump	0.24 HP (0.18 Kw) (2 P)	0.24 HP (0.18 Kw) (2 P)	0.24 HP (0.18 Kw) (2 P)
Coolant Pump	0.24 HP (0.18 kW) (2 P)	0.24 HP (0.18 kW) (2 P)	0.24 HP (0.18 kW) (2 P)
Internal Grinding Spindle	1 HP (0.75 Kw) (2 P)	1 HP (0.75 Kw) (2 P)	1 HP (0.75 Kw) (2 P)

Cylindrical Grinder GER C 450Multi-Function Cylindrical Grinders

SPECIFICATION	FS-1050-SD
Grinding Surface	39.37” x 23.62”(1000 x 600mm)
Grinding Area	39.37”x 19.69”x 16.73”(1000x 500 x 425mm)
Clamping Surface	39.37” x 19.69”(1000x500mm)
Table Slot	3 slots, middle 18 H7
Table Load Max	3,042 lbs (1,380 kg)
Table Longitudinal Movement	0.79” x 41.34”(20-1050mm)
Table Drive	Hydraulic
Table Speed	0.08-1.1 in/min (2-28 m/min)
Table Speed Control	Control valve
Table Set up	Push Button
Distance Table to Spindle Center	7.09” x 24.61”(180-625mm)
Vertical Drive	Electromechanical with Ball Screw
Vertical Speed	3.94-39.37 in/min (100-1000 mm/min)
Vertical Set up	Electrical Hand–wheel or Push Button
Minimum Infeed	0.00004” (0.001 mm)
Measuring System	Motor Measuring System
Cross Movement Max	19.69” (500 mm)
Drive Mode	Electromechanical with Ball Srew Drive
Cross Speed	3.94-39.37 in/min (100-1000 mm/min.)
Cross Set up	Electrical Hand-wheel or Push Button
Measuring System	Motor Measuring System
Spindle Motor	14.75 HP (11 kW)
Spindle Speed	1,400 RPM
Grinding Wheel Size, Standard	15.75” x 3.94” x 5”(400x100x127 mm)
Spindle Bearing	Precision Roller Bearing
Lubrication	Lifetime- Lubrication

Cylindrical Grinder GER C 450Multi-Function Cylindrical Grinders

SPECIFICATIONS	AT-2140-G-TW	AT-2160-G-TW
Swing over bed	21” (533 mm)	21” (533 mm)
Swing over cross slide	14” (356 mm)	14” (356 mm)
Distance between centers	40” (1000mm)	60” (2000mm)
Spindle nose	D1-8	D1-8
Spindle bore(max. bar diameter)	3 1/16” (78.5 mm)	3 1/16” (78.5 mm)
Spindle speed	16 steps	16 steps
Spindle speed range	20 – 1,600 rpm	20 – 1,600 rpm
Ranges:	20-25-35-50-65-85-115-150-210- 280-380-500-670-900-1200-1600	20-25-35-50-65-85-115-150-210- 280-380-500-670-900-1200-1600
Length on bed	21” (537 mm)	21” (537 mm)
Width of bridge	21 3/8” (542 mm)	21 3/8” (542 mm)
Cross slide travel	11” (280 mm)	11” (280 mm)
Top slide travel	5 3/8” (137 mm)	5 3/8” (137 mm)
Number of V ways	3 each “V” ways	3 each “V” ways
Bed width	13 ½” (345 mm)	13 ½” (345 mm)
Swing in gap	31” (790 mm)	31” (790 mm)
Gap bed length from faceplate	8” (200 mm)	8” (200 mm)
Quill diameter	4” (102 mm)	4” (102 mm)
Quill center	M.T. 5	M.T. 5
Quill travel	7” (178 mm)	7” (178 mm)
Range of whit worth threads& No. ( )	2-72 T.P.I (45)	2-72 T.P.I (45)
Range of metric threads No.	0.2/14 (39)	0.2/14 (39)
Range of D.P. & No.( )	8-44 (21)	8-44 (21)
Range of M.P. & No. ( )	0.3-3.5 (18)	0.3-3.5 (18)
Longitudinal feed	0.0015-0.04” (0.04-1.0 mm)	0.0015-0.04” (0.04-1.0 mm)
Cross feeds	0.00075-0.02” (0.02-0.5 mm)	0.00075-0.02” (0.02-0.5 mm)
Main motor	12 ½ hp (9 kW)	12 ½ hp (9 kW)
Coolant pump	1/8 hp (0.09 kW)	1/8 hp (0.09 kW)
Length packed	100” (2500 mm)	118” (3000 mm)
Width packed	>44” (1,120 mm)	>44” (1,120 mm)
Height packed	>66” (1,670 mm)	>66” (1,670 mm)
Gross Weight	5,830lbs (2650kg)	6,600lbs (3000kg)

Cylindrical Grinder GER C 450Multi-Function Cylindrical Grinders

SPECIFICATIONS	AT-2180-G-TW	AT-21120-G-TW
Swing over bed	21” (533 mm)	21” (533 mm)
Swing over cross slide	14” (356 mm)	14” (356 mm)
Distance between centers	80” (2000mm)	120” (3000mm)
Spindle nose	D1-8	D1-8
Spindle bore(max. bar diameter)	3 1/16” (78.5 mm)	3 1/16” (78.5 mm)
Spindle speed	16 steps	16 steps
Spindle speed range	20 – 1,600 rpm	20 – 1,600 rpm
Ranges:	20-25-35-50-65-85-115-150-210- 280-380-500-670-900-1200-1600	20-25-35-50-65-85-115-150-210- 280-380-500-670-900-1200-1600
Length on bed	21” (537 mm)	21” (537 mm)
Width of bridge	21 3/8” (542 mm)	21 3/8” (542 mm)
Cross slide travel	11” (280 mm)	11” (280 mm)
Top slide travel	5 3/8” (137 mm)	5 3/8” (137 mm)
Number of V ways	3 each “V” ways	3 each “V” ways
Bed width	13 ½” (345 mm)	13 ½” (345 mm)
Swing in gap	31” (790 mm)	31” (790 mm)
Gap bed length from faceplate	8” (200 mm)	8” (200 mm)
Quill diameter	4” (102 mm)	4” (102 mm)
Quill center	M.T. 5	M.T. 5
Quill travel	7” (178 mm)	7” (178 mm)
Range of whit worth threads& No. ( )	2-72 T.P.I (45)	2-72 T.P.I (45)
Range of metric threads No.	0.2/14 (39)	0.2/14 (39)
Range of D.P. & No.( )	8-44 (21)	8-44 (21)
Range of M.P. & No. ( )	0.3-3.5 (18)	0.3-3.5 (18)
Longitudinal feed	0.0015-0.04” (0.04-1.0 mm)	0.0015-0.04” (0.04-1.0 mm)
Cross feeds	0.00075-0.02” (0.02-0.5 mm)	0.00075-0.02” (0.02-0.5 mm)
Main motor	12 ½ hp (9 kW)	12 ½ hp (9 kW)
Coolant pump	1/8 hp (0.09 kW)	1/8 hp (0.09 kW)
Length packed	138” (3510 mm)	178” (4520 mm)
Width packed	>44” (1,120 mm)	>44” (1,120 mm)
Height packed	>66” (1,670 mm)	>66” (1,670 mm)
Gross Weight	7,480lbs (3400kg)	9,240lbs (4200kg)

Rotary Grinder Republic 21/40

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Rotary Grinder Republic 21/40Rough and Finish Grinding

Rotary Grinder Republic 21/40Rough and Finish Grinding

Rotary Grinder Republic 21/40Rough and Finish Grinding

Cylindrical Grinder GER C 450Multi-Function Cylindrical Grinders

Cylindrical Grinder GER C 450Multi-Function Cylindrical Grinders

Cylindrical Grinder GER C 450Multi-Function Cylindrical Grinders

Cylindrical Grinder GER C 450Multi-Function Cylindrical Grinders

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