Heavy-Duty Mill/Drill Features Power Feed
Grizzly’s G0755 heavy-duty gear-head mill/drill features a motorized headstock elevation travel on a dovetail-way column for improved movement accuracy and increased rigidity.
Grizzly’s G0755 heavy-duty gear-head mill/drill features a motorized headstock elevation travel on a dovetail-way column for improved movement accuracy and increased rigidity. The machine features high-precision P5 spindle bearings, gear-head spindle speed controls, a reversible spindle and a longitudinal variable-speed power feed.
The precision-ground cast iron table measures 9 1/2" × 31 1/2". The distance from the spindle to column is 10", and maximum distance from the spindle to the table is 18". The table travels measure 17" and 7 7/8" in the X and Y axes, respectively. Head travels measure 13 3/4" in the Z axis. The head tilts as far as 90 degrees left or 45 degrees right and has a motorized Z-axis travel on a large cast iron column. The machine is equipped with an R-8 spindle taper, course and fine downfeed controls, and a 2-hp, 220-V single-phase motor.
The more common twist drill point geometries often are not the best for the job at hand. By choosing the best point for the material being drilled, it is possible to achieve better tool life, hole geometry, precision, and productivity.
The right choices in tooling and technique can optimize the thread turning process.
To make the transition to hard turning, you'll need to switch from carbide to CBN inserts, but that is easier (and more economical) than you might think. It's making the jump to much higher surface speeds that might scare you off. It needn't. Here's why.