Boring Machines

Horizontal Boring Machines

GURU NANAK Engineering Works(Regd.) with over 4 Decades' experience, have earned an enviable reputation as manufacturer of High Quality, Reliable & economical "KARAM" Highly Precision Horizontal Boring Machine which is a versatile Machine Tool for all types of roughing & finishing operations within the range of BORING, MILLING, DRILLING, REAMING & FACING. It is most suitable for machining bores in various types of Machine Bodies & Gear Boxes, for surface milling & especially for large dia flange facing. High precision workmanship, Sturdy & well proportionate design of Castings, High powered spindle & face plate drive along with Wide Range of Spindle Speeds & Gear Box Feeds ensure high production of accurately machined parts with the use of both H.S. Steel & Carbide tools. The Robust & Massive construction of the machine is a guarantee to withstand fully all the working stresses.
 
* The Casting is done with the mixture of 25% Steel & Ferro Chrome etc. to acquire proper Brinell     Hardness & it is also seasoned for at least six months. The Machine is manufactured to Grade-1     Limits of ACCURACY.
* High Accuracy of machining due to precision scrapped/ground Guideways of Bed & Pillars etc.
* Fine Positioning by Dial Indicatiors & Verniers or Digital Read-Out System having an accuracy of      .005 mm resolution for close manufacturing tolerances.
* Geometrical Accuracy of the machine conforms to Dr. SCHLESINGER'S ACCEPTANCE TEST CHART.
* Heavily ribbed box type Bed to withstand the Heavy Loads & Sturdy box type Columns to resist the    heavy cutting force even at elevated height.
* Precise Synchronized Vertical Travel of Head Stock & Boring Stay Support.
* All traverses of X,Y & Z Axis of the machine as well as circular movement of the Work Table are
   provided with automatic Feeds and Rapid Travels.
* All gears are precision cut on imported Mother Machinery to ensure smooth and Silent running.
* Manual Boring Head Height setting adjustment with a lever attached to feed gear box.
* Centralized control with swiveling Pendent Board for easy and convenient operations.
* Hand Operated knurled Knob attached to head stock drive motor and hand operated wheel    attached to feed gear box motor for the safest engagement of speeds and feeds respectively.
* Special Attachments like Threading, Milling and Taper Boring Attachments permit to perform Multi-
   Operations on a single machine.
* 4x90° Position of Rotary Table set with the help of an accurate adjustable stopper.
SAFETY CLUTCHES: To Disengage: ( a) Facing Mechanism (b) Sliding Mechanism of Cross Slide
(c) Rotary Movement of Work Table ( d) Longitudinal Movement of Work Spindle.

Apart from above safety Measures, Limit Switches & suitable Shear Pins are also provided for total safety of the machine

TECHNICAL SPECIFICATIONS

1. Alloy Steel Work Spindle Handened &      Ground-Diameter	65	80	100	110	125	150
2. Morse Taper Number	4	5	6	6	6	Metric 80
3. Max. Longitudinal Movement of Working     Spindle	410	510	510	510	600	800
4. Number of Spindle Speeds	9	9	9	9	9	9
5. Range of Spindle Speeds - R.P.M.	20 to 300	15 to 300	15 to 300	15 to 250	15 to 250	15 to 250
6. Longitudinal Work Spindle Feeds (Nos.)	9	9	9	9	9	9
7. Max. Height of the Spindle Axis     from Table Surface	800	925	1000	1100	1250	1500
8. Min. Height of the Spindle Axis     from Table Surface	20	25	35	35	35	50
9. Dimensions of the Rotary Table	880x1050	900x1125	1030x1375	1100x1450	1225x1675	1500x2000
10. Longitudinal Table Traverse	1500	1625	1775	1925	2050	2225
11. Long. Table Traverse Feeds       ( Including one Rapid)	10	10	10	10	15	15
12. Transversal Table Travel Feeds       (Including one Rapid)	10	10	10	10	15	15
13. Vertical Head Stock Travel Feeds       (Including one Rapid)	4	4	4	4	15	15
14. Rotary Table Autiomatic Feeds       ( Including one Rapid)	10	10	10	10	15	15
15. Max. Cross Movement of the Table	910	1000	1100	1300	1550	2000
16. Max. Distance Between Stay Bearing       and Facing Head	2150	2400	2690	2800	2950	3400
17. Facing Head Diameter	450	505	555	600	650	700
18. Weight Approximate in Kgs.	7500	8500	10000	11500	16500	20000

STANDARD EQUIPMENTS :

Two  Electric Motors :-  3 H.P.& 2 H.P. for 65mm H.B.M., 5 H.P. & 2 H.P. for 80mm H.B.M., 7.5 H.P. & 2 H.P. for 100mm H.B.M., 10 H.P. & 3 H.P. for 110mm H.B.M., 12.5 H.P. & 5 H.P. for 125mm H.B.M. & for 150mm H.B.M. 15 H.P. & 5 H.P. Electric Motors complete with Panel Board & Pendant Control Board.  One Facing Head with Single Point Tool Holder, 2 Nos. Lubrication Pumps, 5 Nos. Limit Switches, One Steel Telescopic Cover to guard the machine Bed,   One Machine Lamp, One Boring Bar, One Spindle Vibration Control Guide, Co-ordinate  reading  arrangement  with Scales & Verniers for X,Y and Z Axis along with Crank Handles are also supplied as Standard Equipments with every machine.

EXTRA EQUIPMENTS :

2Axis or 3Axis Digital Read-out System for the Pin-Point Accuracy, Angular D.R.O. System for the perfect indexing of Rotary Work Table, TURCITE coating for the anti-friction movements of all major sliding parts of the machine,  Vertical or Universal Milling Attachment, Taper Boring Attachment, Threading Attachment complete with special Threading Chuck, Revolving Centre with 6”/ 8” True Chuck, Three Nos. Dial  Indicators in dust proof Aluminium housings with attachments & Electric Coolant Pump etc. can be supplied as EXTRA EQUIPMENTS at their Net Extra Costs.

Vertical Turning Cum Boring Mills

TECHNICAL SPECIFICATIONS

Table Diameter	mm		1000	1200	1500	2000	2500	3000
Max. Turning Dia	mm		1200	1350	1750	2250	2750	3250
Working Height Under Cross Rail	mm		700	1000	1200	1500	1700	2000
Ram Heads on Cross Rail	No.		One	One	One	One	One	One
Vertical Travel of Ram Head	mm		450	550	650	750	800	900
Swivel Angle of Ram Head	Deg.		+/-35	+/-35	+/-35	+/-35	+/-35	+/-35
Table Speeds	No.		6	6	6	6	6	6
Range of Table Speeds	RPM		9 to 90	9 to 90	9 to 90	5 to 50	3 to 30	3 to 30
Feeds for Horizontal & Vertical Travels	No.		6	6	6	6	6	6
Range of Feeds, Horizontal & Vertical	mm/min		1.5 to 9	1.5 to 9	1.5 to 9	1.5 to 9	0.5 to 5	0.5 to 5
Main Motor Drive	H.P.		7.5	10	15	20	25	30
Motor for Vertical Travel of Cross Rail	H.P.		2	2	2	3	3	5
Motor for Rapid Traverse	H.P.		2	2	2	3	3	5

1. The machine is complete with Full Electricals & duly equipped with  Panel Board & Pendent Control Switch      Board for the centralized control.

2. Gear Box for Auto-Feed Ram Head both Vertical & Horizontal is provided.

3. Alloy Steel duly hardened Gears are used.

4. Phosphorus Bronze Nuts are used for Lead Screws

5. 2.5mm Thick Turcite-B Lining is used on RAM/SADDLE.

6. Forced Lubrication with a Motorized Lubrication Pump is provided for the main Rotary Table. Independent      Lubrication Pumps are provided for the Ram/Saddle  &  Cross Rail.

7. Precision Bearings and GUNMETAL guideways combination in the Bed/Table is provided to withstand Radial      &  Vertical Loads.

Horizontal Floor Boring Machines

We have developed "KARAM" High Precision Horizontal FLOOR TYPE BORING MACHINE which is most suitable for very heavy & High Volume Jobs which can't be accommodated on the work table of conventional Horizontal Boring Machine. Such jobs can easily be handled with the Floor Boring Machine as the work-piece is kept on the Floor Plate/s provided separately with the machine. Additional ROTARY TABLE Attachment is also supplied as per customer's requirement. The design of machine is unique which ultimately provides stiffness, accuracy, precision and optimum output. The especially designed machine bed is wide enough to provide a very rigid base to the moving column. The geometrical accuracy of the machine conforms to Dr. Schlesinger's Acceptance Test Chart. The special feature of this machine is that a Variable Frequency Drive (AC DRIVE) is used for the Centralized Control of Vertical Movement of Head Stock as well as Horizontal Movement of Saddle carrying column. These infinitely variable speeds are further controlled by a potentiometer duly fitting the same on pendant board of the machine which also eliminates shifting of levers again & again. Centralized Lubrication System ensures proper lubrication to all the moving parts. Special Attachments like Milling Attachment, Threading Attachment and Taper Boring Attachments enable the machine to perform multi-operations. CNC Version of the machine can also be offered as per requirement.

TECHNICAL SPECIFICATIONS

1. Alloy Steel Work Spindle Hardened &     Ground-Diameter	100	110	125	150
2. WORK SPINDLE TAPER	M.T.6 or ISO 50	M.T.6 or ISO 50	M.T.6 or ISO 50	Metric 80
3. Longitudinal Movement of the Working     Spindle (Z – AXIS)	600	700	800	1000
4. Number of Spindle Speeds	9	9	9	9
5. Range of Spindle Speeds – R.P.M.	15  to 250	15 to 250	15 to 250	15 to 250
6. Vertical Travel of Head Stock  (Y – AXIS)	1 to 1.5 Mtrs.	1 to 1.75 Mtrs	1 to 2 Mtrs	1.5 to 2.5 Mtrs.
7. Horizontal Traverse of Column (X – AXIS)	2  to  8 Mtrs.	2  to  8 Mtrs	3  to 7 Mtrs.	3  to 7 Mtrs.
8. Facing Head Diameter	555	600	650	700
9. Radial Traverse of Facing Slide (U-AXIS)	150	150	180	200
10. Main Spindle Motor	7.5H.P.	10 H.P.	12.5H.P	15 H.P.
11. Feed Gear Box Motor	3H.P.	3H.P.	5 H.P.	5 H.P.
12. Rotary Table Attachment (Optional)	1000x1000	1250x1250	1500x1500	1500x2000
13. Sliding Movement of Rotary Table	800	900	1000	1250
14. Floor Plate/s (Optional)	1250x1250 x250	1500x1500 x250	2000x1500 x250	2000x2000 x250

Rotary Linear Work Tables

We have developed "KARAM" High Precision Horizontal FLOOR TYPE BORING MACHINE which is most suitable for very heavy & High Volume Jobs which can't be accommodated on the work table of conventional Horizontal Boring Machine.

Main Dimensions & Capacities :
Table Top – * Square	mm	1000 x 1000	1500 x 1500	2000 x 2000
Number of T-Slots	nos.	5	6	7
Size of T – Slots	mm	19	19	19
Load Carry Capacity	Kgs.	4000	6000	10000
Total Height, incl. Rotary Table	mm	750	750	800
Number of Guideways	nos.	2	2	3
Traverse :
*Sliding movement of Work Table	mm	1000	1200	1500
Drive Data :
Electric Motor	H.P.	3	5	7.5
A.C. Drive	H.P.	3	5	7.5
Linear Feed Rate with A.C. Drive	mm/min	50 to 500	50 to 500	50 to 500
Rotary Movement for Positioning	With Power Feed	Yes	Yes	Yes
Accuracy :
Positioning Accuracy	With D.R.O.	+/- 1 Minute	+/- 1 Minute	+/- 1 Minute
Positioning Accuracy Linear Axis	mm	0.02	0.02	0.02