- The power train gears and spline shafts are made of the finest quality, heat treated and ground nickel-chrome steel, giving extra strength and smoothness to high torque loads
- The spindle is made of finest case hardened steel, for extra strength and wear
- The spindle is supported by double row taper roller and thrust ball bearings at the nose, with thrust and radial axis bearings at the top
- Build to withstand exceptionally heavy drilling and boring loads to insure maximum accuracy
- Arm raising safety device prevents arm from dropping
- Counter balanceed mechanism for spindle return
- 6 Speeds/3 Feed rates make exotic materials easier to drill, bore and tap
- Centralized control center
- Automatic tool ejector
- Independent arm electric clamping system, which locks and unlocks the head and column
- Push botton controls are all reduced to 110VAC
- Electrical circuits are located in the build-in control box at the rear of the arm. This keeps the controls dust-and-humidity-free while making them easilly accessible for maintenance
- Entire frame is made of Meehanite and high tensile strength cast iron to handle the haviest of jobs
Specification
Model Number | J-720R |
Overall Dimensions | 64 x 32 x 85 |
Net Weight | 2970 pound |
Motor | 3 HP, 230/460V 3Ph, Prewired 230V |
Number of Spindle speeds | 6 (88 - 1500) |
Spindle Taper | 4 MT |
T-Slots Number and Size (in.) | 3 & 3/4 |
Column Diameter (in.) | 8-1/4 |
Drilling Capacity Cast Iron (in.) | 2 |
Drilling Capacity Mild Steel (in.) | 1-1/2 |
Tapping Capacity Cast Iron (in.) | 1 |
Tapping Capacity Mild Steel (in.) | 3/4 |
Boring Capacity Steel (in.) | 2-3/7 |
Boring Capacity Cast Iron (in.) | 4 |
Distance Column to Spindle (max/in.) | 29-1/2 |
Distance Column to Spindle (min/in.) | 8-5/8 |
Travel of Head Horizontal (in.) | 20-7/8 |
Distance Base to Spindle (max/in.) | 41-3/4 |
Distance Base to Spindle (min/in.) | 9-5/8 |
Arm Travel Vertical (in.) | 23-13/16 |
Quill Travel (in.) | 8-1/4 |
Quill Travel w/ Powerfeed engaged (in.) | 8-1/4 |
Quill Down feed Rates (IPR) | .002, .004, .006 |
Elevating Motor | 1 HP |
Table Size (in.) | 23-5/8 X 17-1/2 X 15 |
Coolant Pump Motor | 1/8 HP |
Machine Hieght from Floor (in.) | 85-7/16 |
Table Dimensions (in.) | 23-5/8 X 17-1/2 X 15 |
Jet Radial Drill Press 3HP, 230/460V