Grizzly G7948, G7947 instruction manual Depth Stop Feed Shaft Spring Calibration

Page 40

Depth Stop

Feed Shaft Spring

Calibration

Tension

The drill press comes fitted with a depth stop to use when drilling multiple holes at the same depth. The scale on this depth stop can be calibrated if it ever becomes incorrect.

The feed shaft return spring is adjusted at the factory; however, during the life of the drill press you may want to adjust the feed shaft return spring so the feed shaft return pressure suits your operating needs.

To calibrate the depth stop:

 

 

 

1.

Loosen the jam nut and calibration nut shown

 

 

 

in Figure 41.

 

 

Wear safety glasses when

 

 

 

 

 

 

 

 

adjusting springs. Serious

 

 

 

 

injury may occur if this

 

 

 

 

warning is ignored!

 

Depth

Stop

To adjust the feed shaft spring tension:

 

 

 

 

Flange

1.

UNPLUG THE DRILL PRESS!

 

 

 

 

Jam Nut

2.

Wipe off any oil on the spring lock cover so it

 

 

 

 

 

 

 

does not slip in your fingers when you hold the

 

 

 

 

cover from spinning (see Figure 42).

 

Calibration

 

 

 

 

Nut

 

 

Spring Cover

 

 

 

 

 

Figure 41. Depth stop assembly.

 

 

Lock Slot

 

 

 

 

2.Use the calibration nut to zero the depth stop scale with the depth stop flange.

3.Hold the depth stop at zero, and tighten the jam nut to hold the depth stop in position.

4.Test the depth stop by measuring how far the spindle actually moves with respect to where you set the depth stop.

Spring Lock Cover

Jam Nut and Cover Nut

Figure 42. Feed shaft return spring assembly.

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G7947/G7948 12 Speed Floor Drill Press

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Contents Model G7947/G7948 G7947 G7948Page Table of Contents Warranty and Returns Foreword IntroductionContact Info Machine Data Sheet Other Related Information G7948 Machine Data Sheet 17-1/2 Table Height Crank Raises/lowers table IdentificationColumn Lock Lever Locks table height Safety Safety Instructions for MachineryAlways Lock Mobile Bases if Used Before Operating Machinery Safety for Drill Presses Circuit Requirements 110/220V OperationAmperage Draw Circuit RequirementsGrounding Extension Cords110V Operation 220V OperationSET UP Set Up SafetyItems Needed for Set Up UnpackingInventory Hardware Recognition Chart Clean Up Site ConsiderationsFloor Load Working ClearancesTo install the table support Column and BaseTable Support Components and Hardware Needed QtyHandles and lock levers installed Headstock Assistance when movingHeadstock is Very Heavy. You Must To assemble the drill chuck and mount it to Drill Chuck & ArborSpindle To install the downfeed handles Downfeed Handles Belt Cover KnobTo install a light bulb in the drill press To install the tableLight 110V Only Test Run Floor Mounting Mobile Base MountingFactory adjustments that should be verified Recommended AdjustmentsTo make and use the base plate Operation Safety Installing/Removing To install a drill bitOperations To remove a drill bitChoosing Speeds Using the Drill Bit Speed ChartLubrication Suggestions Changing Speeds To change speedsDrilling Depth Stop Adjusting Table Table HeightTable Rotation Table TiltArbor Removal To remove the drill chuck and arborAccessories G5753-Drill Press ViseG3640-Power Twist V-Belt 1⁄2 x H1300 H1298 G7984 H2347 H0736Maintenance Service About ServiceTroubleshooting Motor & ElectricalPulley is loose Remove pulley Drill Press Operations Depth Stop Feed Shaft Spring Calibration Loosening cover and jam nut Power and light switch assembly Electrical ComponentsG7947/G7948 Wiring Diagram G7947 Stand/Table Breakdown G7947 Headstock Breakdown G7947 Parts List DescriptionPVA26 G7948 Stand/Table Breakdown G7948 Headstock Breakdown G7948 Parts List PVA29 Warranty and Returns Warranty Card CommentsGrizzly INDUSTRIAL, INC BOX BELLINGHAM, WAPage 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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