Jet J-720R, Operating Instructions And Parts Manual

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6
4.0 Specifications
Model number J-720R
Stock number 320033
Head and Spindle
Push button controls 110V
Spindle motor TEFC, 3HP (2.2kW), 3PH, 8.2/4.1A, 230/460V, prewired 230V 1
Spindle taper MT4
Spindle speeds six speeds: 88, 154, 282, 455, 796, 1500 RPM
Quill travel 8-21/32 in. (220 mm)
Quill travel with powerfeed engaged 8-1/4 in. (209.5 mm)
Spindle travel along arm, total 20-7/8 in. (530 mm)
Quill downfeed rates 0.002, 0.004, 0.006 IPR (0.5, 0.09, 0.15 MMPR)
Spindle to base surface, maximum (no tooling) 41-3/4 in. (1060 mm)
Spindle to base surface, minimum (no tooling) 9-5/8 in. (244.5 mm)
Spindle center to column, maximum 29-1/2 in. (750 mm)
Spindle center to column, minimum 8-5/8 in. (220 mm)
Sound level (approx. 3-1/4ft./1m from gearbox) 2,3 73 dB(A) at 1500 rpm; 71 dB(A) at 88 RPM
Machining capacities
Drilling
Mild Steel 1-1/2 in. (38 mm)
Cast Iron 2 in. (51 mm)
Tapping
Mild Steel 3/4 in. (19 mm)
Cast Iron 1 in. (25.4 mm)
Boring
Mild Steel 2-3/8 in. (60.3 mm)
Cast Iron 4 in. (101.6 mm)
Arm and Column
Column Diameter 8-1/4 in. (210 mm)
Arm vertical travel on column 23-13/16 in. (605 mm)
Arm elevating motor TEFC, 1HP (0.75 kW), 3PH, 230/460V, 3.2/1.6A, 60Hz
Base and Table
Box table dimensions (LxWxH) 23-5/8 x 17-1/2 x 15 in. (600 x 445 x 380 mm)
T-slots in table 6 at 3/4 in. (19 mm)
Base dimensions (LxWxH) 49-1/4 x 25-1/4 x 6-3/8 in. (1250 x 640 x 160 mm)
T-slots in base 3 at 3/4 in. (19 mm)
Additional specifications
Coolant pump motor TEFC, 1/8 HP (0.1kW), 3 PH, 220/440V, 0.2/0.1A, 60Hz
Machine height, floor to motor at max. elevation) 85-1/2 in. (2170 mm)
Machine height, floor to column top 73 in. (1850 mm)
Net weight (approx.) 2697 lbs. (1224 kg)
Shipping weight (approx.) 2970 lbs. (1347 kg)
Shipping dimensions (LxWxH) 64 x 32 x 85 in. (1625 x 810 x 2160 mm)
Table 1
1
Conversion to 460 volt requires separate purchase and installation of overload relay, fuses and amp meter. See sect. 6.4.4.
2
Measured under test conditions SS41 material, 32mm thick, Ø32mm tool.
3
The specified values are emission levels and are not necessarily to be seen as safe operating levels. As workplace conditions
vary, this information is intended to allow the user to make a better estimation of the hazards and risks involved only.
IPR = inches per revolution MMPR – millimeters per revolution
L = length, W = width, H = height
The specifications in this manual were current at time of publication, but because of our policy of continuous
improvement, JET reserves the right to change specifications at any time and without prior notice, without
incurring obligations.