Jet JWBS-140S Operating Instructions And Parts Manual

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16Adjusting Upper Blade Guide AssemblyIn Figure 19, the blade guard has been removed forclarity.Never operate the Band Sawwithout all guards in place and in workingorder.Referring to Figure 19:1. Disconnect machine from power source.2. Loosen lock knob (A) and raise or lower theupper blade guide assembly (C) to just abovethe material being cut.3. Tighten lock knob (A). Make sure blade guideblocks (D) are still flat to the blade. Ifadjustment is necessary, loosen lock knob (A)and rotate the assembly until the guideblocks (D) are flat to blade.If movement of the blade guide assembly seems“stiff” when being raised or lowered, it can beadjusted to slide more easily. This is controlled byan internal spring and ball that provides varyingdegrees of resistance against the guide post.To adjust tension on the spring:4. Remove the knob (A).5. Using a 5mm hex wrench, tighten or loosen thesetscrew (B) until desired tension is reached.6. Reattach and tighten the knob (A).Blade Guide AdjustmentNever operate the Band Sawwithout all guards in place and in workingorder.Referring to Figure 20:1. Disconnect machine from power source.2. Remove the blade guard.Note: Blade must already be tensioned andtracking properly.3. Loosen thumbscrews (A) and move the guideblocks (B) as close to the blade (C) as possiblewithout pinching it.4. Tighten thumbscrews (A).5. Loosen thumbscrew (D) and move the guideblock bracket (E) in or out until the front edgeof the guide blocks (F) are just behind the"gullets" of the saw teeth.6. Tighten thumbscrew (D).7. Replace the blade guard.Figure 19Figure 20Blade Support Bearing AdjustmentNever operate the Band Sawwithout all guards in place and in workingorder.1. Remove the blade guard.2. Loosen the thumbscrew (G).3. Adjust for a gap of 1/64" between thebearing (F) and blade (C).Note: To set this distance quickly, you can place adollar bill or piece of paper between supportbearing and back of blade.)4. Tighten the thumbscrew (G).5. Replace the blade guard.Repeat the Blade Guide Adjustment and BladeSupport Bearing Adjustment for the Lower BladeGuide Assembly.