Grizzly G0747 and G0748 owner manual Spindle Downfeed, Downfeed Controls

Page 38

Spindle Downfeed

Spindle downfeed movement on the mill is con- trolled by three mechanisms: 1) The coarse downfeed lever, 2) the fine downfeed handwheel, and 3) the auto-downfeed system.

Downfeed Controls

Use Figure 34 and the following descriptions to become familiar with the spindle downfeed con- trols.

A

 

J

 

 

I

B

 

 

 

 

H

 

C

G

 

 

D

 

F

 

 

E

 

 

Figure 34. Downfeed controls.

A.Auto-Downfeed Rate Selector. Selects one of the three auto-downfeed rates.

B.Fine Downfeed Handwheel. Manually con- trols slow spindle downfeed.

C.Auto-Downfeed Direction Pin. Starts, stops, and reverses the auto-downfeed direction.

When spindle rotation is reversed, either by changing the spindle speed range or by using the spindle direction switch, the direc- tion of spindle auto-downfeed will reverse.

D.Fine Downfeed Clutch Lever. Engages the fine/auto-downfeed gears.

E.Downfeed Scale. Used with the quill dog, shows the depth of spindle downfeed in inches.

F.Quill Lock Lever. Secures the quill in place for increased stability during operations.

G.Downfeed Stop & Locking Wheel. Sets the depth of spindle downfeed. The stop is threaded into position, then the locking wheel is used to secure it in place.

H.Coarse Downfeed Lever. Manually controls quick spindle downfeed.

I.Quill Dog. Moves with the quill and spin- dle, and disengages the downfeed clutch lever when it contacts either the top or the downfeed stop.

J.Downfeed Selector. Sets the mill for manual downfeed or auto-downfeed control.

-36-

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

Page 37 Page 39
Image 38
Page 37 Page 39
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 Safety Instructions for MachineryPage Additional Safety for Milling Machines Full-Load Current Rating Power SupplyAvailability Circuit Requirements forMinimum Gauge Size 14 AWG Grounding InstructionsExtension Cords 50 ftUnpacking SetupNeeded for Setup Inventory Small Item Inventory Figure QtyBasic steps for removing rust preventative CleanupBefore cleaning, gather the following Site Considerations To lift and move the mill Lifting & PlacingHEAVy Lift Bolting to Concrete Floors Leveling & MountingLeveling Machine MountsTo assemble the mill AssemblyInitial Lubrication Test Run Mill Test RunPower Feed Test Run To test the power feedSpindle Break-In Inspections AdjustmentsTo perform the spindle break-in procedure Operations Operation OverviewTable Locks Table MovementGraduated Index Rings Axis Power Feed Identification Head Movement Axis Power Feed OperationTo operate the X-axis power feed Tool Needed QtyTilting Head Forward/Backward Rotating Head Left/RightRotating Ram Ram MovementMoving Ram Forward/Backward Recommended Cutting Speed FPM x Spindle SpeedDetermining Spindle Speed Tool Diameter in inches xSetting Model G0747 Spindle Speed To set the Model G0747 spindle speedLow Spindle Speed Range Setting Model G0748 Spindle Speed To set the Model G0748 spindle speedSpindle Downfeed Downfeed ControlsTo use the coarse downfeed Coarse DownfeedFine Downfeed Auto-Downfeed To use the auto-downfeedSpindle Brake Model G0747 brake lever G0748 Brake LeverUnloading Tooling Loading/Unloading ToolingLoading Tooling Tools Needed QtyAccessories G1076-52-PC. Clamping KitG7155-6 Precision Milling Vise G9299-10 Yuasa-Type Rotary TableSchedule MaintenanceCleaning Protecting Lubrication QuillTable Ways One-Shot Oiler Headstock GearingTable Elevation Leadscrew Ram WaysHead Tilt & Ram Pinions Power Feed Gears To lubricate the power feed gearsMachine Storage Symptom Possible Cause Possible Solution ServiceTroubleshooting Symptom Possible Cause Possible Solution Adjusting Gibs Saddle gib and adjustment screw Knee Gib Adjustment ScrewAdjusting Leadscrew Backlash Axis Leadscrew BacklashCross Leadscrew Backlash Tramming Spindle To tram the spindle to the tablePage Wiring Wiring Safety InstructionsG0747 Wiring Diagram G0748 Wiring Diagram Parts MainMain Parts List DescriptionAxis Leadscrews DescriptionDownfeed System Downfeed System Parts List CAM ROD Sleeve Assembly G0747 Headstock G0747 Headstock Parts List PFH30M Flat HD SCR M5-.8 XG0748 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 Warranty Card CommentsGrizzly INDUSTRIAL, INC BOX BELLINGHAM, WAWarranty & 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.
Top Page Image Contents