We have two styles of regrind fixtures available. |
DM-43
This machine comes complete with the toolholder and diamond grinding wheel.
 More
about the DM-43 |
 |
|
|
|
 |
DM-41
A regrind fixture for tool and cutter grinding machines.
More
about the DM-41 |
Either style of regrinding fixture can be used to resharpen half round and/or single flute drills, or take advantage of
Sterling Gun Drills' resharpening service with fast turnaround. (See also the Regrinding Section.) |
 |
|
|
|
DM-41 Gun and Half Round Drill Regrind Fixture |
The Sterling Gun Drills manual regrind fixture provides a fast and easy method of resharpening gun
drills and half round drills with the popular facet style grind. Drills of a large diameter range are positioned
and ground without the need of expensive bushings or collets. The universal nature of the fixture allows standard
or custom regrinds. |
 |
|
|
The Sterling Gun Drills DM-41 Gun Drill Regrinding Fixture Consists of Three Elements:
|
1) |
The Workhead with clamping device to hold either a single flute gun drill or half round drill in position. |
|
2) |
A Scale, graduated in degrees, to allow the drill to be aligned in the vertical plane. This scale is
mounted on the vertical member of the fixture that holds the workhead. |
|
3) |
A Scale mounted on the diamond - shaped base of the fixture to allow the drill to be angled in the
horizontal plane. This scale is graduated in degrees. |
Both scales have locking levers to maintain vertical and horizontal positioning, and when used together allow
compound angles to be ground on the nose of the drill mounted in the workhead.
The fixture is normally used on a tool and cutter grinder equipped with a 11V9 or 11A2 style diamond wheel (120 -
180 grit). Some may chose a metal or plated bond wheel with concentric roughing and finishing faces, the roughing
face having a coarser grit than the finishing faces. The spindle of the grinding wheel will start at 90° to the
table slideway. |
|
Regrinding Instructions for Standard Nose Grinds: |
|
2. |
Initial Setting |
|
2.1 |
Place the fixture on the table of the machine. The base of the fixture has two parallel sides which must be
positioned inline to the table slideway. (90° to the spindle). Set with a dial indicator, then clamp the base to
the table with bolts through the two slots. |
|
2.2 |
Select the appropriate clamping blade for the drill type. The angled one is for "V" flute gun drills, ensuring
the "F" mark is toward the front. The flat blade for half round drills. Store the unused blade on the tapped hole
provided on the "V" base. |
|
2.3 |
Slide the gun drill or the half round drill in from the rear of workhead. With the knurled locking screw, lock on
the tube leaving the carbide tip completely clear of the "V" block and clamp. With both horizontal and vertical
scales set at zero, the drill's flat cutting surface should be parallel to the table. |
|
2.4 |
Grind the drill by following steps outlined for the most common grinds. Custom nose grinds can be ground to your
requirements. It is recommended that a suitable dust collection be used. A cold gun or spraymist is recommended
for larger diameters. |
|
 |
Portable
grinding machine
