Superior 302 Drill Sharpening Machine

Features   Specifications

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The 302 Drill Sharpener was designed, engineered and manufactured with one goal in mind - to offer drill users an INEXPENSIVE but ACCURATE and efficient machine to resharpen the vast majority of their 2, 3 and 4 flute drills. Such a machine must be rigid, wet grinding for surface finish, easy and "automatic" in its set up and operation, and with the qualities of centered, precise geometry accomplished on previous more expensive Superior drill pointers.

These goals were realized in the 302. The radial relief drill point generated by the 302 is of a quality and centrality equal to the most expensive of drill pointers, and its range of up to 1-1/4" diameter covers a majority of drills being used. The same jaw type drill holding unit incorporated in all Superior sharpeners makes its operation easy and accurate.

Point angles, chisel angles and lip clearance are variable while generation of the recommended best, general purpose 118° point is automatically accomplished by simply setting the scale to the diameter of drill being sharpened,

The 302 is truly a "production level" drill sharpening machine at a cost that makes it a profitable investment for small or large quantity drill users.

ACCURACY

Jaw location ensures point centrality
. Positive stop ensures equal lip heights
. Radial Relief Point gives adequate clearance with maximum strength to the cutting lip

SIMPLICITY
. Can be operated by unskilled labor
. Single setting gives correct point geometry
. Built-in wheel dressing diamond

VERSATILITY

. Sharpens 2, 3, 4 flute drills
. Chisel, point angles, clearance variable
. Sharpens H.S.S. (or Carbide with suitable .diamond wheel)

SPEED
. Fast, easy change over drill to drill, lip to lip
. Vertical movement gives several sharpenings between wheel dressings
. Wet grind for speed and surface finish

Features of Operation:

1.FORWARD FEED WHEEL gives easy, even infeed while manually oscillating drill.

2.INFEED STOP/LOCK gives spark out for smooth surface, assures equal lip heights drill lip to lip

3 DRILL HOLDING UNIT incorporates jaw method for easy loading, accurately centered point, and balanced easy oscillation with anti-backlash feature.

4. BUILT IN WHEEL DRESSING incorporates special infeed wheel and diamond for easy, accurate wheel dressing.

5.POINT ANGLE SCALE makes variation of radial relief point simple. Automatic correct clearance and chisel angles given for drill being ground. Also variable by setting.

6.MALE and FEMALE TAILSTOCK CENTERS give easy accurate loading.

The Superior Drill Holding Method requires only three pairs of jaw bits to hold all two flute drills in its diameter range

The drill is positioned by the tailstock center and the lower fixed jaw, and is then gripped by tightening down the upper jaw. These jaws locate inside the flute and behind the land (as illustrated). This method of locating and holding ensures a correctly centered point or step angle, even if original flute indexing of the drill were inaccurate, and also prevents any damage to the lands of the drill.

Specifications:

RANGE
Diameter: 1/8" through 1-1/4" Dia.
Flutes: 2, 3 or 4 - spiral or straight
Point angles: 90° through 140°
Maximum drill length: 13-1/2"

OPTIONAL: Longer tailstock bar for greater O.A.L.

GRINDING WHEEL: 12"x1"x3"

ELECTRICS:
220-440 Volt, 60 cycle, 3 phase
Grinding wheel motor 1725 RPM, 1 hp
Coolant pump motor 3450 RPM, 1/12 hp

COLOR: Blue

DIMENSIONS:
Base: 15-1/2" x 24"
Height: 44"
Net Wgt.: 500 Ibs approx.
Gross Wgt.: 550 Ibs approx.