Grizzly G7947, G7948 Drill Chuck & Arbor, To assemble the drill chuck and mount it to, Spindle

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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

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Contents G7947 G7948 Model G7947/G7948Page Table of Contents Warranty and Returns Contact Info IntroductionForeword Machine Data Sheet Other Related Information G7948 Machine Data Sheet 17-1/2 Column Lock Lever Locks table height IdentificationTable Height Crank Raises/lowers table Safety Instructions for Machinery SafetyAlways Lock Mobile Bases if Used Before Operating Machinery Safety for Drill Presses Circuit Requirements Circuit Requirements110/220V Operation Amperage Draw220V Operation GroundingExtension Cords 110V OperationUnpacking SET UPSet Up Safety Items Needed for Set UpInventory Hardware Recognition Chart Working Clearances Clean UpSite Considerations Floor LoadComponents and Hardware Needed Qty To install the table supportColumn and Base Table SupportHandles and lock levers installed Headstock is Very Heavy. You Must Assistance when movingHeadstock Spindle Drill Chuck & ArborTo assemble the drill chuck and mount it to Downfeed Handles Belt Cover Knob To install the downfeed handlesLight 110V Only To install the tableTo install a light bulb in the drill press Mobile Base Mounting Test Run Floor MountingTo make and use the base plate Recommended AdjustmentsFactory adjustments that should be verified To remove a drill bit Operation Safety Installing/RemovingTo install a drill bit OperationsLubrication Suggestions Using the Drill Bit Speed ChartChoosing Speeds To change speeds Changing SpeedsDrilling Table Tilt Depth Stop Adjusting TableTable Height Table RotationTo remove the drill chuck and arbor Arbor RemovalG5753-Drill Press Vise AccessoriesH1300 H1298 G7984 H2347 H0736 G3640-Power Twist V-Belt 1⁄2 xMaintenance Motor & Electrical ServiceAbout Service TroubleshootingPulley is loose Remove pulley Drill Press Operations Depth Stop Feed Shaft Spring Calibration Loosening cover and jam nut Electrical Components Power and light switch assemblyG7947/G7948 Wiring Diagram G7947 Stand/Table Breakdown G7947 Headstock Breakdown Description G7947 Parts ListPVA26 G7948 Stand/Table Breakdown G7948 Headstock Breakdown G7948 Parts List PVA29 Warranty and Returns Comments Warranty CardBOX BELLINGHAM, WA Grizzly INDUSTRIAL, INCPage Call Today For a Free Full Color Catalog

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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