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| [[Category:Tools]][[Category:Metal Shop]]
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| {{ToolBox|tool_title=48-inch Jump Shear|image=Metal_Shop_jump_shear_nolabels.png|caption=Jet 48-inch Jump Shear|
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| location=Metal Shop|training=[https://www.artisansasylum.com/class-catalog Tool classes]|testing=
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| [https://www.artisansasylum.com/tool-testing Tool testing], or [[:Category:Metal Shop#Tool Testing
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| Night|come to the shop on Tool Testing Night]]|restrictions=green|make=Central Machinery|model=12-Ton|
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| serial=Unknown|manufacturer_specs=n/a|manual=[https://drive.google.com/file/d/1dkSvgaDHEOI-oTHDXDp6ET00QeXu0oSx/view?usp=drive_link Manual]|rubric=n/a|tool_categories=}}
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| ==Use for:==
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| * Up to 16 ga (0.0625") sheet metal, any metal is okay
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| * Note that different metals have different thickness limits.
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| ==Do Not Use for:==
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| * Any sheet metal exceeding max thickness
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| ==Hazard Analysis==
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| * The workpiece can snap unexpectedly or break. Eye Protection Required
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| * Caught-between injuries when cutting
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| * Don’t pinch hands in the machine’s moving parts
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| * Don’t smash a foot under the foot petal
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| * Shin injuries from slipping off the foot pedal
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| * Cuts/ scrapes from sharp cut edges of work
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| {{EyeWarning}}
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| {| class="infobox" cellspacing="5" style="width: 22em; text-align: left; font-size: 100%; line-height: 1.5em;"
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| ! colspan="2" class="infobox-image" | [[File:Metal_Shop_jump_shear_thickness_capacity.png|450px|thickness equivalents]]
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| |-
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| | colspan="2" | Equivalent thickness for shearing different metals relative to mild steel.
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| |-
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| |}
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| ==Operation Notes==
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| * To perform multiple cuts of the same length, use the backstop and front stop attachments (stored under the pan and box brake).
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| * Thickness limits are different for different metals.
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| '''Refer to the chart on the machine'''
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| ==Basic Operation Instructions==
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| {| class="infobox" cellspacing="5" style="width: 22em; text-align: left; font-size: 100%; line-height: 1.5em;"
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| ! colspan="2" class="infobox-image" | [[File:Metal_Shop_jump_shear_hold_down.png|450px|foot lever and hold down]]
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| | colspan="2" | The foot lever and hold down on the jump shear.
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| |-
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| |}
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| '''Test before use - make sure blades are not interfering with each other.'''
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| 1. Step on Foot Lever
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| 2. As the foot lever travels downward, the Hold Down will press against the work piece at about half way. The Foot Lever will stop at this point.
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| 3. To engage the cutting blade and perform the cut, use both feet to “jump" on the Foot Lever and press it to the floor.
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| '''Test with Craft Paper''' A paper grocery bag works well.
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| {| class="infobox" cellspacing="5" style="width: 22em; text-align: left; font-size: 100%; line-height: 1.5em;"
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| ! colspan="2" class="infobox-image" | [[File:Metal_Shop_jump_shear_rear_adjustment_screws.png|450px|rear adjustments]]
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| | colspan="2" | Adjustment screws on the rear of the jump shear, for the upper blade.
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| |-
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| |}
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| {| class="infobox" cellspacing="5" style="width: 22em; text-align: left; font-size: 100%; line-height: 1.5em;"
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| ! colspan="2" class="infobox-image" | [[File:Metal_Shop_jump_shear_front_adjustment_screws.png|450px|front adjustments]]
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| | colspan="2" | Adjustment screws on the front and sides of the jump shear, for the lower blade.
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| |-
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| |}
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| * '''If the shear cuts paper on the ends but not the center,''' loosen the hex nut and turn the tie-rod adjusting screw clockwise, as viewed from back, until paper is cut the entire length.
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| * '''If the shear cuts paper in the center but not the ends,'' loosen the hex nut and turn the tie-rod adjusting screw counter-clockwise until the paper is cut the entire length.
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| * Retighten the hex nut against the frame.
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| * To adjust the bottom blade, loosen the large bolts on the sides and adjust with bolts on the front.
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