เครื่องขันน็อตไฮดรอลิก BST bolt tensioners

Threaded load cell bolt tensioners

This Blackiron bolt tensioners series is ideal to be used in tight space applications

BWT Wind tensioners multistage

Multistage hydraulic spring return bolt tensioners. Ideal for use on wind towers, suitable for various bolt sizes.

Operating pressure 1350 bar, safety valve, limit switch indicator, interchangeable nut bridge, spring loaded nut rotating socket, stroke 10 mm.

Special bridges available for oversized nuts

Special hydraulic bolt tensioners

Blackiron designs and manufactures special custom tensioners for all needs, suitable for bolts up to 7″ and more.

BHT Standard bolt tensioners

Hydraulic bolt tensioners for bolts from M20 to M130 & from 3/4 “to 5”.

Gravity return, end stroke indicator, guided piston. Maximum reliability and extra lifetime