| TECHNICAL SPECIFICATION |
| MODEL |
JK-UCGM-270 |
| PROCESSING CAPACITY / WORKING AREA |
| Swing over table |
270 mm |
| Centre Height |
130 mm |
| Distance between centers |
600 mm |
| Grinding Length |
500 mm |
| Maximum Grinding Diameter(OD) |
150 mm |
| Grinding Diameter(OD) |
6 mm |
| Maximum Grinding Diameter(ID) |
120mm |
| Grinding Diameter(ID) |
6 mm |
| Part Weight admissible between centres |
60 kg |
| Part Weight admissible in chuck |
50 kg |
| WHEEL HEAD |
| Driving motor power |
3.7 Kw |
| Circumferential speed |
30 m/s |
| External Grinding wheel size |
300 x 127 x 40 mm |
| usable size of wheel (OD) |
200 x 127 x 40 mm |
| External Grinding wheel spindle speed |
1300-2000 rpm |
| Internal Grinding Wheel Spindle Diameter |
Ø45 x 250 mm |
| Internal grinding spindle speed range |
15000 -20000 rpm |
| Internal grinding arbors and Quills |
To suit above spindle |
| Face grinding arbors |
To suit above spindle |
| Wheel head swivel L.C |
With L.C 1 deg. |
| Wheel Head Swivel range |
min '210° in one direction & min 10° in other direction . |
| Bore Grinding Capacity |
6 - 30 mm in diameter |
| Rapid Approach |
50 mm |
| In-feed with hand wheel |
20 mm |
| Max plunge feed on dia (Auto) |
1.5 mm |
| increment on diameter |
0.001 mm |
| In-feed rate on diameter (coarse/ Fine) |
0.015-3 mm/min |
| Spark off time |
0-60 sec |
| Front and Rear Movement Range |
150 mm |
| Grinding wheel Infeed Range |
120 mm |
| Universal Wheelhead/One external & one internal grinding spindle. |
| The wheel head will be equipped with maintenance free in built motor spindle with min three variable speed control. |
| Wheelhead will swivel. Also an Internal Grinding Attachment is provided. This means that workpieces can be completely machined in the same clamping. |
| Grinding spindle bearings will be roller/angular contact bearings of high accuracy, without wear and no play adjustments ensuring maintenance. |
| Capable to grind external, Face & Internal Grinding in single setup |
| WORK HEAD |
| Workhead is suitable for both grinding between fixed centres and for live spindle grinding. Accuracy of roundness for live spindle grinding is less than 0.0004 mm. Fine adjustment feature provided for cylindricity corrections of below 1 micron during live spindle grinding. |
| Spindle Speed |
60- 600 rpm . 5 steps |
| Holding Taper Internal |
MT3 / MT 4 / MT 5 |
| Reduction Sleeve |
MT3 - MT4 |
| Roundness accuracy |
less than 0.0004 |
| workhead Bearings protected against Dirt. |
Overpressure filters /seals |
| Driving Power |
0.4 kW |
| Swivel Angle |
120°(90° ccw,30° cw) |
| WORK TABLE |
| Table Stroke |
500 mm |
| Table Speed |
0.1-5 m/min |
| Lower Table (Z axis) with linear scale |
| Maximum swivel of table |
Upto 10° |
| automatic travel |
2-10 mm |
| TAILSTOCK |
| The Tailstock is designed for the use of Morse 3/4 taper centers. Centre pressure adjustment is possible to achieve delicate precision grinding of small and thin parts also. The Tailstock fine adjustment possible for finest possible taper correction in the range below 1 micron when grinding between centers. |
| Air cushion provided under the Tailstock for easy relocation during set up. |
| Tailstock with fitting taper MT4 and 35mm / 1.38" stroke. |
MT 4 |
| Travel of Quill |
35 /50 mm |
| Quill Diameter |
min. 40 mm |
| Fine Adjustment for taper corrections |
+/- 40 microns |
| HYDRAULLIC UNIT |
| Hydraullic tank capacity |
40 ltr |
| Hydraullic motor power |
0.75 kW |
| Pump Capacity |
8 lpm |
| COOLANT SYSTEM |
| Magnetic separator filter system with coolant tank |
Standard |
| Coolant tank capacity |
120 ltr. |
| Motor power |
0.4 kW |
| Pump Capacity |
| ACCURACIES |
| Roundness to the Ground workpiece when live spindle |
Less than 0.0004 mm |
| Workpiece spindle axis equillibrium measured by face grinding of the workpiece in live spindle |
0.001 mm |
| straightness accuracy of the ground workpiece on measuring length of 630 mm |
0.0025 mm |
| Positional accuracy X Axis for complete stroke |
0.003 mm |
| Repeatability X Axis |
0.002 mm |
| External Grinding wheel spindle run out |
0.005 mm |
| DRESSING |
| Dressing device mounted on the workhead or on table |
| Following Dressing arrangements with mounting arrangements. single point dressing, , multi point rotary dressing unit |
| WORK ENCLOSURE |
| Machine lighting with LED lamp, 10 Watt |
| Operator safety guard provided. |
| MACHINE BASE & GUIDEWAYS |
| The machine base made from a mineral casting or grey cast iron optimized for high rigidity, vibration damping and guaranting longer wheel life and better surface finish. |
| Temperature fluctions extensively compensated by the favourable thermal behaviour of the machine base, resulting in high dimensional accuracy at all time |
| STANDARD ACCESSORIES |
| Wheel Adapter for external grinding wheel |
3sets |
| Set of open end wrenches - Size 40 |
1set |
| Internal Grinding Unit |
24000 rpm -1no |
| 42000rpm -1no. |
| Internal Grinding Arbors (5-12mm/12-32mm in different length) |
1no. Each |
| Collets for internal Grinding (Ø3, Ø4, Ø5, Ø6) |
1no. Each |
| set of allen keys |
1set |
| Balancing Mandrel |
1no. |
| Box Wrench |
1set |
| Static balancing equipment and balancing arbor |
1no. |
| Assembly Arbour |
1no. |
| Centres for workhead and Tailstock |
1no. Each |
| Dressing Tool Holder for workhead on Tailstock |
1no. Each |
| PCD Dressing plate |
1no. |
| Reduction Sleeve |
1set |
| Full Carbide tipped centre points |
1no. |
| Half Carbide tipped centre points |
1no. |
| Ejector Rod |
1no. |
| Set of Damping boses |
1set |
| Set of Diamond holder with diamonds |
1no. Each |
| Supporting plate for diamond holder on workhead or tailstock |
1no. Each |
| Grinding wheel flange |
2sets |
| Collet dia 2 to 25mm |
with 0.5mm step |
| Magnetic chuck-min dia 170mm |
1no. |
| Three & Four jaw chuck Ø160mm |
1no. Each |
| Grinding wheels for External & Internal |
2no. Each |
| Manual Draw Bar |
1no. |
| Wheel Changing aid |
1no. |
