Grizzly G0747 and G0748 Setting Model G0747 Spindle Speed, To set the Model G0747 spindle speed

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Setting Model G0747 Spindle Speed

The Model G0747 has 16 spindle speeds—eight in low motor speed and eight in high motor speed. Setting the spindle speed involves: 1) Selecting the spindle speed range, 2) positioning the V-belt, and 3) setting the spindle switch.

To set the Model G0747 spindle speed:

1.Make sure the spindle is completely stopped.

2.pull the spindle speed range selector knob (see Figure 27) out, position the selector in the high or low position, then release the knob to seat the knob pin in the detent.

Note: If it is difficult to move the range selec- tor, rotate the spindle by hand to help mesh the gears until the selector moves freely.

Spindle Speed

Range Selector

Figure 27. Model G0747 spindle speed range

selector in the forward (high) position.

Model G0747/G0748 (Mfg. Since 8/12)

3.Move the high-low range lever shown in Figure 28 to the high or low position.

High-Low

Range

Lever

High Low

Figure 28. Model G0747 high-low range lever.

4.Firmly grasp the spindle, then quickly rotate it in a back-and-forth motion until you hear/feel the front pulley drop into the spindle clutch.

—if this step was not successful, use the high-low range lever to re-set the speed range, then repeat this step until you are certain that the spindle is seated into the spindle clutch.

5.remove the belt housing side covers on either side of the head to expose the V-belt and pulleys, as shown in Figure 29.

Adjustment Lever

Lock Lever

V-Belt & Pulley(1 of 2)

Access

Figure 29. Model G0747 V-belt and pulleys

exposed.

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Contents For models manufactured since 8/12 Page Table of Contents Wiring Contact Info IntroductionMachine Description Manual Accuracy Front View Identification Model G0747 Headstock Identification Model G0748 Headstock Identification Machine Data Sheet Main Specifications Operation Info Model G0748 Vertical Mill Variable Speed Variable Safety Instructions for Machinery SafetyPage Additional Safety for Milling Machines Circuit Requirements for Power SupplyAvailability Full-Load Current Rating50 ft Grounding InstructionsExtension Cords Minimum Gauge Size 14 AWGUnpacking SetupNeeded for Setup Small Item Inventory Figure Qty InventoryBasic steps for removing rust preventative CleanupBefore cleaning, gather the following Site Considerations To lift and move the mill Lifting & PlacingHEAVy Lift Machine Mounts Leveling & MountingLeveling Bolting to Concrete FloorsTo assemble the mill AssemblyInitial Lubrication Mill Test Run Test RunTo test the power feed Power Feed Test RunSpindle Break-In Inspections AdjustmentsTo perform the spindle break-in procedure Operation Overview OperationsTable Locks Table MovementGraduated Index Rings Axis Power Feed Identification Tool Needed Qty Axis Power Feed OperationTo operate the X-axis power feed Head MovementRotating Head Left/Right Tilting Head Forward/BackwardRotating Ram Ram MovementMoving Ram Forward/Backward Tool Diameter in inches x Spindle SpeedDetermining Spindle Speed Recommended Cutting Speed FPM xTo set the Model G0747 spindle speed Setting Model G0747 Spindle SpeedLow Spindle Speed Range To set the Model G0748 spindle speed Setting Model G0748 Spindle SpeedDownfeed Controls Spindle DownfeedTo use the coarse downfeed Coarse DownfeedFine Downfeed To use the auto-downfeed Auto-DownfeedModel G0747 brake lever G0748 Brake Lever Spindle BrakeTools Needed Qty Loading/Unloading ToolingLoading Tooling Unloading ToolingG1076-52-PC. Clamping Kit AccessoriesG9299-10 Yuasa-Type Rotary Table G7155-6 Precision Milling ViseSchedule MaintenanceCleaning Protecting Quill LubricationHeadstock Gearing Table Ways One-Shot OilerTable Elevation Leadscrew Ram WaysHead Tilt & Ram Pinions To lubricate the power feed gears Power Feed GearsMachine Storage Symptom Possible Cause Possible Solution ServiceTroubleshooting Symptom Possible Cause Possible Solution Saddle gib and adjustment screw Knee Gib Adjustment Screw Adjusting GibsAxis Leadscrew Backlash Adjusting Leadscrew BacklashCross Leadscrew Backlash To tram the spindle to the table Tramming SpindlePage Wiring Safety Instructions WiringG0747 Wiring Diagram G0748 Wiring Diagram Main PartsDescription Main Parts ListDescription Axis LeadscrewsDownfeed System Downfeed System Parts List CAM ROD Sleeve Assembly G0747 Headstock PFH30M Flat HD SCR M5-.8 X G0747 Headstock Parts ListG0748 Headstock G0748 Headstock Parts List Headstock Front COVER, Aluminum One-Shot Oiler Accessories G0747 Machine Labels & Cosmetics G0748 Machine Labels & Cosmetics Model G0747/G0748 Mfg. Since 8/12 Comments Warranty CardBOX BELLINGHAM, WA Grizzly INDUSTRIAL, INCWarranty & Returns

G0747 and G0748 specifications

The Grizzly G0747 and G0748 are advanced metal lathes designed for precision machining and versatility, catering to both amateur machinists and professional workshops. These machines stand out in the realm of metalworking equipment, thanks to their robust construction and innovative features.

One of the key attributes of the G0747 and G0748 is their solid cast iron construction, which provides excellent vibration dampening during operation. This enhances stability and precision, crucial for producing high-quality machined parts. Equipped with powerful motors, both models are capable of handling a wide range of materials, from aluminum to harder metals like steel.

The G0747 features a variable speed drive system, allowing users to adjust the spindle speed based on the project at hand. This flexibility is beneficial for tasks that require different cutting speeds, enabling machinists to optimize cutting performance and tool longevity. Its variable speed output ranges, alongside smooth torque delivery, make it ideal for intricate turning operations.

On the other hand, the G0748 includes an advanced digital readout (DRO) system. This feature provides real-time feedback on the machine's position and speed, significantly improving accuracy in measurements during machining tasks. The DRO system allows operators to set precise limits and keep track of their progress, essential for complex projects where exact dimensions are critical.

Both lathes are equipped with a user-friendly interface, making them accessible for beginners while still offering advanced functionalities that seasoned professionals appreciate. They include multiple tooling options, allowing for an expansive range of machining techniques including turning, threading, and drilling.

Moreover, the G0747 and G0748 come with a comprehensive assortment of accessories, such as different types of chucks and tool holders, which further extends their capabilities. The ease of changing tooling and quick setup times are significant advantages for shops aiming for efficiency and versatility in their operations.

In conclusion, the Grizzly G0747 and G0748 metal lathes are exemplary units that balance power, precision, and user-friendliness. Their advanced features, such as variable speed capabilities and digital readouts, equip machinists with the tools necessary to produce exceptional work. Whether for hobbyists or industrial applications, these lathes are built to meet a variety of machining needs with impressive performance and reliability.
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