Astra Scientific Tool and Cutter Grinding Machine.
Construction:
Wheel Head: It is of rigid construction and holds the spindle assembly.
It can be fitted horizontally and swiveled vertically full 360 degree,
for quick setting of compound angles. Wheel head is mounted on the rigid
column, which can be raised/lowered up/down. Wheel head also can be
adjusted 150 mm on cross direction.
Wheel Head Spindle:
Alloy steel hardened and ground spindle is mounted on precision
preloaded radial ball bearings, which are greased packed. The grinding
wheels can be mounted on both sides of the spindle and the wheels mount
design is such that the spindle can be reversed.
Work Table:
This is mounted on the carriage and can be swiveled 45 degrees on either
side of the column. This table has a smoother and rapid movement
longitudinally on the carriage through a roller chain guided and
supported in jibs. Slow movement is through a reduction gearbox. Change
over from rapid to slow movement is through a push/pull knob. The
precise movement on roller chain enables smooth, sensitive and accurate
longitudinal movement even with heavy jobs. The adjustable reversing
dogs on the work table are spring loaded for shockproof reversal of
table.
Auxiliary Table:
This table is mounted on work table and in both horizontal and vertical
planes. It can hold job up to 600 mm with the aid of raising blocks.
It's spindle nose has ISO 50/MT 5 tapers and the spindle is mounted to
taper roller bearings.
Max. swing on std. center mm 250 250 280
Swing with raising blocks mm 350 350 380
Length between work head and RH tail stock mm 330 520 610
Admit between centers mm 440 670 760
Max. Height center of wheel above table mm 300 300 380
Longitudinal traverse mm 400 480 510
Cross traverse mm 200 250 250
Swivel either side of centre(End scale) deg. - 9 9
Swivel LH/RH of column (Center scale) deg. 45°/45° 45°/45° 45°/45°
Size of table mm 750 x 115 920 x 140 1010 x 140
Vertical adjustment of wheel head mm 210 210 290
Wheel Head Swivel deg. 3600 3600 3600
Tilting in either direction deg. 180 ± 180 ± 180 ±
Spindle speed rpm 3800/5600 3800/5600 3800/5600
Motor power KW/HP 0.75/1 0.75/1 0.75/1
Net weight of the machine kg. 750 1150 1250
Gross weight of the machine kg. 900 1350 1450
Dimension of Machine (L x W x H) mm 1075 x 1100 x 1400 1325 x 1170 x 1460 1325 x 1170 x 1460