RH Series Center Hole Single-Acting Cylinder, 30 Ton, Inch Rod, Inch Stroke

The hollow center runs 1.297 inches in diameter straight through the cylinder. That opening lets you slip a bolt, anchor rod, or cable through while the cylinder applies force around it, which is exactly the setup you need for bolt tensioning work. It also handles pulling on cables, forcing screws, and similar through-hole applications where the load path runs down the middle.

For through-bolt and tensioning work, the center hole diameter on the RH302 is 1.297 inches, so your bolt, cable, or forcing screw needs to fit through that opening.