6.Suspend a plum bob from the center of the headstock spindle so it is over the tape/ruler as shown in Figure 13.

7.Center the headstock directly over the base as indicated by the plum bob and ruler.

Figure 13. Aligning headstock with base.

8.Tighten the two headstock setscrews to the column, as shown in Figure 14.

Figure 14. Securing headstock to column.

Drill Chuck & Arbor

The drill chuck attaches to the spindle by means of the arbor, shown in Figure 15. Matched tapers on the arbor and the inside of the chuck create a semi- permanent assembly when properly joined.

Chuck Key

Arbor

Drill Chuck

Drift Key

 

 

Figure 15. Chuck components.

To assemble the drill chuck and mount it to

the spindle:

 

1.Use mineral spirits to thoroughly clean the drill chuck, arbor, and spindle sockets and dry all surfaces before assembly. Follow all safety warnings on the container of the mineral spirits. Failure to clean the mating surfaces may cause the tapered fit to loosen during operation, resulting in separation and an unsafe condition.

2.Use the chuck key to adjust the jaws of the drill chuck until they are inside the drill chuck body.

3.Place the drill chuck face down on a workbench. The arbor has a short taper and a long taper. Place the short taper into the socket in the back of the drill chuck and tap it with a rubber or wooden mallet, as shown in Figure 16. If the chuck fails to remain secure

on the arbor, repeat Steps 1 & 2.

G7947/G7948 12 Speed Floor Drill Press

-21-

Page 23
Image 23
Grizzly G7947, G7948 instruction manual Drill Chuck & Arbor, To assemble the drill chuck and mount it to, Spindle

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.