Depth Stop

Adjusting Table

The Model G7947/G7948 has a depth stop that allows you to drill repeated non-through holes to the same depth every time.

The table can raised/lowered, rotated, and tilted 90° left or right. Table adjustment controls are shown in Figure 30.

The depth stop consists of a stud attached to the

 

 

 

quill with two hex nuts that can be lowered or

 

 

 

raised on the stud so the lower nut (depth nut)

 

 

 

hits a stop bracket when the drill bit is lowered.

 

Support Bracket

 

The upper hex nut (jam

nut) is then used

to

 

 

 

Lock Knob

 

tighten against the depth nut to secure it in place

 

 

 

 

Table Rotation

so

it doesn't move with

repeated operations.

 

 

 

 

Lock Knob

Figure 29 shows the various components of the

 

 

 

 

 

depth stop.

 

 

 

 

Table Height

 

 

 

 

 

 

 

 

 

 

 

 

Crank

 

Depth Nut

Jam Nut

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Location Pin Nut

Lock Bolt

 

 

 

 

 

Figure 30. Table adjustment controls.

 

 

 

 

Table Height

 

 

Depth

 

 

1.

Loosen the support bracket lock knob.

 

 

 

 

 

 

 

Stop Stud

 

 

2.

Adjust the height.

 

 

 

 

 

 

 

 

Stop

 

3.

Lock the support bracket lock knob.

 

 

Bracket

 

 

 

 

 

 

 

 

Figure 29. Depth stop components.

 

Table Rotation

 

To set the depth stop:

 

 

1.

Loosen the table rotation lock knob.

 

 

 

 

 

1.

Lower the drill bit to the required height.

 

2.

Rotate the table as necessary.

 

 

 

 

2.

Thread the depth nut down against the stop

3.

Lock the table rotation lock knob.

 

 

 

 

bracket.

 

 

Table Tilt

 

 

 

 

 

 

3.

Lower the jam nut against the depth nut.

 

1.

Tighten the location pin nut to draw the loca-

 

 

 

 

4.

Using wrenches, hold the depth nut in place

 

tion pin out of the hole. Note: The location

 

pin is friction fit in the hole to lock the table at

 

and tighten the jam

nut against the depth

 

 

 

0°. When reinstalling, set the table to 0°, back

 

nut.

 

 

 

 

 

 

 

the nut off, and tap the pin back in the hole.

 

 

 

 

 

Note: The scale on the depth stop can be recali- brated if it gets moved or has changed since the factory setting. Refer to Calibrating Depth Stop on Page 38 for instructions on how this is done.

2.Loosen the lock bolt and tilt the table to the desired angle (make sure table rotation lock knob is locked, so the table won't fall out).

3.Tighten the lock nut bolt.

-30-

G7947/G7948 12 Speed Floor Drill Press

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Image 32
Grizzly G7948, G7947 Depth Stop Adjusting Table, Table Height, Table Rotation, Table Tilt, To set the depth stop
Page 31 Page 33

G7947, G7948 specifications

The Grizzly G7948 and G7947 are powerful, professional-grade milling machines designed for precision metalworking. These models cater to the needs of machinists and hobbyists alike, combining innovation with robust features ideal for various milling tasks.

The Grizzly G7948 is a vertical mill with a large working table, allowing users to handle bigger workpieces efficiently. It features a 2 HP motor, providing a spindle speed range from 50 to 3,000 RPM, enabling operators to tackle a wide range of materials and applications. The G7948’s dovetail column ensures stability and rigidity, minimizing vibrations during operation, which is crucial for achieving precision in milling tasks.

On the other hand, the Grizzly G7947 is a versatile combination of a lathe and a mill, perfect for those looking to maximize functionality in a smaller workspace. It also boasts a robust 1 HP motor, allowing for smooth operation with adjustable spindle speeds, enhancing its versatility. The G7947 is particularly user-friendly, featuring a quick-change tool post that facilitates faster tool swapping and changeovers, which is a significant advantage when working on multiple projects.

Both models come equipped with advanced features such as a digital readout (DRO) system that aids in precision measurements. The DRO provides real-time feedback on the machine's positioning, helping eliminate guesswork and ensuring accuracy. Additionally, the machines' power feed for the table enhances efficiency, making it easier for users to execute repetitive tasks without the strain of manual cranking.

Another notable characteristic of the Grizzly G7948 and G7947 is their user-friendly controls, designed with ergonomics in mind. The intuitive layout ensures that operators can easily navigate through the machine’s settings, allowing for quicker setup times and smoother workflow.

Lastly, the sturdy construction of both milling machines means they are built to withstand rigorous use, making them reliable choices for both industrial applications and serious hobbyists. These models exemplify Grizzly's commitment to quality and performance, making them exceptional additions to any workshop.
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