Southbend SB1026, SB1025 Adjusting Gibs, Disconnect Mill from Power Before Adjusting the Gibs

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SB1024/SB1025/SB1026

S E R V I C E

For Machines Mfg. Since 8/09

Adjusting Gibs

Gibs are tapered lengths of metal that are sandwiched between two moving surfaces. Gibs control the gap between these surfaces and how they slide past one another. Correctly adjusting the gibs is critical to producing good milling results.

Tight gibs make table movement more accurate but stiff. Loose gibs make moving the table sloppy but easier to do. The goal of gib adjustment is to remove unnecessary sloppiness without causing the ways to bind.

Gibs are adjusted with a screw on each end of the gib, that move the tapered gib back-and- forth to increase or decrease the friction pressure between the sliding surfaces. The process of properly adjusting the gibs requires trial-and- error and patience.

DISCONNECT MILL FROM POWER BEFORE ADJUSTING THE GIBS!

Make sure all table and knee locks are loose. Then, loosen one gib adjustment screw and tighten the other the same amount to move the gib. Use the ball handles/crank to move the table/ knee until you feel a slight drag in that path of movement.

Refer to Figures 61–63to identify the locations of the table, saddle, and knee gibs, and one of the two adjustment screws for each.

Note: It will be necessary to remove small parts, such as way wipers and covers, to access the gib adjustment screws.

Table Gib &

Adjustment Screw

Figure 61. Table gib and adjustment screw underneath

the left side of the table.

Saddle Gib &

Adjustment Screw

Figure 62. Saddle gib and adjustment screw.

Knee Gib &

Adjustment

Screw

Figure 63. Knee gib and adjustment screw.

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Contents 42 Milling Machine Updates Customer ServiceScope of Manual Manual FeedbackTable of Contents Parts Features About These MachinesForeword CapabilitiesFront View Identiﬁcation Identification-front view Model SB1024 shownModel SB1024 Belt Housing Headstock Identiﬁcation Model SB1024 belt housing and headstock identificationModel SB1025/SB1026 Belt Housing Headstock Identiﬁcation Model SB1024 42 Variable Speed Milling Machine Power Feed Machine SpeciﬁcationsTable Information Model SB1025 42 Milling Machine Power Feed 80, 140, 220, 325 RPM Model SB1026 42 Milling Machine Power Feed High Range of Spindle Speeds Basic Machine Safety Understanding Risks of MachineryF E T Y Additional Milling Machine Safety Preparation Overview Things Youll NeedUnpacking InventoryCleaning & Protecting Before cleaning, gather the followingBasic steps for removing rust preventative Location Lifting & Moving To lift and move the millLeveling & Mounting Bolting to Concrete FloorsLeveling Assembly To install the ball handlesBall Handles Knee CrankFront way cover installed Way CoversPower Connection SB1025 220V 3-PhaseSB1024 SB1026Initial Lubrication Test RunTo test run the machine To test the X-axis power feed unit and table limit switch Inspections Adjustments To perform the spindle break-in procedureSpindle Break-In Operation Overview A typical milling operation, the operator does the followingControl Panel Table MovementGraduated Index Rings Table LocksAxis Power Feed To operate the X-axis power feedHead Movement Tilting HeadRotating Head Tramming SpindleTo tram the spindle to the table Tools Needed QtyPlace the parallel block directly under Ram Movement Moving Ram Back-and-ForthRotating Ram Setting Spindle Speed Setting Spindle Speed RangeDetermining Spindle Speed Setting SB1024 Spindle Speed Range Model SB1024 Spindle Speed RangesSetting SB1025/SB1026 Spindle Speed Range Model SB1025 Spindle Speed RangesMeshing Spindle & Spindle Clutch Setting Spindle Speed Setting SB1024 Spindle SpeedSetting SB1025/SB1026 Spindle Speed F2/R2Using the Coarse Downfeed Handle Downfeed ControlsManual Disengaged Position Auto-Downfeed Engaged Position Using the Fine Downfeed Handwheel Fine Downfeed ControlsUsing the Auto-Downfeed System To use the auto-downfeed systemSpindle Brake = 0.006 in./rev = 0.0015 in./rev = 0.003 in./revLoading/Unloading Tooling Loading ToolingUnloading Tooling Maintenance Schedule Before Beginning OperationsOngoing Daily, After OperationsMonth/Year LubricationCleaning LubricationUnpainted & Machined Surfaces Quill Table Ways One-Shot OilerSpeed Range Bearing Sleeve SB1024 Only Headstock GearingPower Feed Gears To lubricate the power feed gearsRam Ways Head & Ram Rack & Pinion Gear Power feed ball handle removed Drive Gear Bevel Gear Cleaning Coolant Reservoir CleaningTo clean out the coolant reservoir HazardsMachine Storage Lubrication section beginning onAdjusting Gibs Disconnect Mill from Power Before Adjusting the GibsAdjusting Leadscrew Backlash Longitudinal Leadscrew BacklashCross Leadscrew Backlash Ball handle, rings, and key removed from Cross leadscrewSymptom Possible Cause Possible Solution TR O U B L E S H O OTI N G Electrical Safety Instructions Wiring Overview Wiring Diagram Color KEYSB1024/SB1026 Electrical Box Box, SeeSB1024/SB1026 Electrical Components Control Panel Viewed From Behind See FigureSB1024/SB1026 Electrical Component Pictures Motor junction boxSB1025 Electrical Box SB1025 Electrical Components SB1025 Electrical Component Pictures SB1025 Motor junction boxHeadstock Headstock Parts List DescriptionReverse Trip Ball Lever Quill SB1024 Gearbox SB1024 Gearbox Parts List DescriptionSB1025/SB1026 Gearbox SB1025/SB1026 Gearbox Parts List SB1024 Belt Housing SB1024 Belt Housing Parts List SB1025/SB1026 Belt Housing SB1025/SB1026 Belt Housing Parts List CAM Ring Screw M6-1 XRam Ram Parts List 668 Column, Knee, & Saddle Parts List Saddle GIB709 Table Parts List Leadscrew NUT BracketOne-Shot Oiler C D E F G HSB1024/SB1026 Electrical Box & Control Panel Electrical BoxSB1025 Electrical Box & Control Panel Control PanelAccessories SB1024 Head Machine Labels SB1024 Main Machine Labels 220V 1PH LabelSB1025/SB1026 Machine Labels Page R R a N T Y Southbendlathe.com