Grizzly G7947, G7948 instruction manual Recommended Adjustments, To make and use the base plate

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Drill presses are top-heavy and must be securely attached to a large-footprint base plate when used with a mobile base. Failure to use a base plate greatly increases pos- sibility of tipping and personal injury.

Needed Materials for Base Plate

Qty

• Plywood 3⁄4" x 233⁄4" x 233⁄4"

2

•

Wood Glue

As Needed

•

Wood Screws #6 x 11⁄4"

24

To make and use the base plate:

1.Glue the two pieces of plywood together, and align the edges and corners so the two boards make one thick piece.

2.Use the wood screws to fasten the boards together from both sides.

3.Allow 24 hours for the glue to dry before placing the drill press on it.

4.Place the base plate on the mobile base.

5.Drill holes through the base plate and the metal plates at the corners of the mobile base.

6.Secure the base plate to the mobile base with hex bolts, hex nuts, flat washers and lock washers, as shown in Figure 23.

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Figure 23. Mounting base plate to mobile base.

Note: Use 21⁄4" long hex bolts.

G7947/G7948 12 Speed Floor Drill Press

7.Place the drill press on the base plate.

8.Position the drill press close to the front of the mobile base, so the mobile base will not be a tripping hazard.

9.Mount the drill press to the base plate with lag bolts and flat washers (Figure 24); or with through bolts, flat washers, and hex nuts.

Figure 24. Drill press mounted on mobile base,

using a base plate for support.

Recommended

Adjustments

For your convenience, the adjustments listed below have been performed at the factory; how- ever, because of the many variables involved with shipping, we recommend that you at least verify the following adjustments before operating your machine—this will ensure that you know the operating tolerances of your machine, and you have them adjusted to your expectation.

Step-by-step instructions for these adjustments can be found in SECTION 7: SERVICE.

Factory adjustments that should be verified:

1.Depth Stop Calibration (Page 38)

2.Feed Shaft Spring Tension (Page 38)

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Contents G7947 G7948 Model G7947/G7948Page Table of Contents Warranty and Returns Introduction ForewordContact Info Machine Data Sheet Other Related Information G7948 Machine Data Sheet 17-1/2 Identification Table Height Crank Raises/lowers tableColumn Lock Lever Locks table height 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 Assistance when moving HeadstockHeadstock is Very Heavy. You Must Drill Chuck & Arbor To assemble the drill chuck and mount it toSpindle Downfeed Handles Belt Cover Knob To install the downfeed handlesTo install the table To install a light bulb in the drill pressLight 110V Only Mobile Base Mounting Test Run Floor MountingRecommended Adjustments Factory adjustments that should be verifiedTo make and use the base plate To remove a drill bit Operation Safety Installing/RemovingTo install a drill bit OperationsUsing the Drill Bit Speed Chart Choosing SpeedsLubrication Suggestions 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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