Jet J-8201 Operating Instructions And Parts Manual

Also see for J-8201: Operating instructions and parts manual Operating instructions and parts manual Operating instructions and parts manual

Contents

13Operating ControlsSTART/STOP SwitchThe START/STOP switch (refer to Figure 5) isused to turn on the band saw drive motor. TheSTART switch has a molded guard which preventsinadvertent pressing of the START pushbutton.The STOP pushbutton is not guarded to allow useas an E-stop in an emergency.Variable Speed ControlThe variable speed control (refer to Figure 9) isused to change the speed of the saw blade. Referto Adjusting Blade Speed for additional informa-tion on the use of the variable speed control.Operating InstructionsSaw bladesThe JET14-inch saws accept blades from 1/8-inchwide to 3/4-inch wide. The narrower widths areused for cutting shapes or circles; the wider widthsare used for straight cuts.For straight cuts, use the widest available sawblade. A wide blade provides cutting stability, andallows for more accurate and straighter cuts.Blade speed effects the efficiency of the cut andthe service life of the blade. Good shop practicerequires that work-hardening materials, such asstainless steel, require the cut be completed in asingle pass. Otherwise, the effect of stopping thecut can result in hardening of the cut interface.Other materials such as wood require higher bladespeeds to prevent fiber tearing. The chart inFigure 5. START/STOP ControlsSTART/STOP SwitchGuarded STARTSwitchE-StopFigure 6 provides suggested blade speeds forvarious types of materials. The recommendedspeeds should be decreased 30 to 50% when usingcarbon steel blades. (The chart provides speedsthat are based on cutting a 4-inch thick work pieceusing a bi-metal blade without cutting fluid.)The following conditions should also be consid-ered:1. Increase speed 15% for materials 1/4-inchthick, 12% for 3/4-inch thick, 10% for 1 1/4-inch thick, and 5% for 2 1/2-inch thick.2. Decrease speed 12% when cutting 8-inch thickmaterial.To avoid tooth breakage, select a blade-tooth pitchthat will have two or more teeth in contact with theworkpiece at all times.Different blade materials and tooth geometry (pitchand set) permit sawing a wide range of commonand exotic materials. Contact your industrialdistributor for recommendations on specializedblades. Using the corrrect blade can save youtime, trouble, and the possibility of dulling andpremature discarding of the blade you normallymight use. NOTE: Always use a sharp blade.SHARP BLADES ARE CHEAP INSURANCEAGAINST POOR CUTTING EFFICIENCY ANDACCELERATED MACHINE WEAR.Material being cut165160-16511590-100105-13590-11580-140105-11540-8040-7080-10055-9055904040-4525-4030003000300080-1603000300030003000Structural steel shapesLow carbon steelMedium carbon steelHigh carbon steelCr-moly steelNi-Cr-moly steelChromium steelCr-vanadium steelTool steelStainless steelFree machining steelCast ironCopper alloy (CU-Zm)BronzeAl-bronzeMonelTitanium alloyAluminum (soft)Aluminum (T-6+)CarbonSlatePTFE sheet, rod, roundsHard rubberPlywoodOther woodsSpeed (SF/M) rangeFigure 6. Blade Speed to Material ChartOperating Instructions