How to cut a slot in a steel plate?

If it ain't broke, fix it 'til it is T42 Apprentice geezer

T-slot distance: 100 mm; made for T-Slot nuts according to DIN508; TolerancePrecision: +- mm 150 mm H= ca 20 mm; H1= mm; H2= 8 mm; D= 50 mm

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steel t slot Our collection of aluminum tabletop T Slot extrusions is engineered for maximum precision and durability These tabletop extrusion plates feature a