OLIVER POINT THINNER

A COMPANION MACHINE TO THE OLIVER DRILL POINTERS TO IMPROVE DRILLING EFFICIENCY

Thin webs to proper thickness
Correct webs that are off center
Correct out of index flutes
Add chip breakers

The best of drill points lose a lot of their proven advantages if poor web thinning is incorporated in the tool. If the thinning is done by hand and one flute is ground a little deeper than the other, you immediately have a drill point with cutting lips of unequal length. Mechanical web thinning generally is not much faster than hand thinning but it does create equal conditions for both cutting lips of the drill. Thus, the drills perform for a greater length of time and overall thinning operations required during the year are reduced.

The web thickness of a drill increases as the drill is re-sharpened. If the drills are not too badly worn when they come to the cutter grind department for resharpening, you can generally get 3 or 4 resharpenings to each thinning operation. Proper web thinning will reduce the amount of torque required for the drilling job. Also, the reduction in end pressure will cause less damage to the chisel angle area of the drill point.

When your drilling operations require precision points, the OLIVER DRILL POINT CHECKING GAGES are
a must in your tool grinding department. A dial indicator immediately shows any existing difference
in the height of the cutting lips.
The gages are easy to operate. The smaller gage is provided with a magnifying glass to assist the
operator in viewing the drill point. Two indicator points are included for measuring the full
diameter range.

The errors found in drill points are usually attributable to either hand grinding, inaccuracies in
the drill grinders being used or improper drill geometry. These difficulties are remedied by an
adjustment of the drill pointing equipment or by using a drill point thinning machine to correct
geometries of the drill.