The hydraulic coach-screwing is designed to fasten and unfasten all types of coachcrews and rail fasteners used for the fixing of rails on sleepers in all track renewing programs. It performs its task with a great precision of regulation of the tightening torque by means of a hydraulic transmission.
The machine is available for all types of gauges and equipped with a standar 4-wheel trolley.
This hydraulic coach-screwing is characterized by its easy handling and sturdiness, and
is made of
-- a petrol or diesel engine on request, to which is connected a highpression gear pump dipped in the tank-housing;
-- a central part constituted by a tank-housing, and
-- a coach-screwing head connected to the central housing which carries a hydraulic motor with vertical axis that feeds the chuck in which is fixed the
tightening key.

The rotation direction of the hydraulic motor is controlled by a hydraulic circuit composed of a distributor with pressure regulator actuated by an electro-valve.
The adjustable tightening torque is indicated on a manometer.

-->Engine power: Honda GX-200 4 Stroke. 6,5 C.V.
-->Screwing torque adjustable from 0 to 56 Kg.*m
-->Equipped with lightning for night work.
-->Socket rotating speeds: 210 r.p.m. (Low)
-->Socket rotating speeds: 50 r.p.m. (High)
-->Automatic change from high speed to low speed over 15 Kg*m
-->Overall dimensions: 1,57*0,57*1,00 mts
Fasten/unfasten activation by means of electrical buttons.

Ultrathin cassette hydraulic wrench:
The Drive Unit is strong unibody design,the material of the wrench is light metal material with high strength and ultra-light Its strength and life are increased comprehensively

A 360°×360°swivel hose connection is closest to no hose design. No restriction is completely in applied space.

A most precise cassette hydraulic wrench, accuracy  reaching  ±1%

The fast cassette hydraulic wrench, has realized full automatically control, providing continuous locking or unlocking, and the speed is two times fast as other similar wrenchs

The simplest axial driving hydraulic wrench, full-automatically, and single operation

Suitable for locking or unlocking bolts above which only having  smaller space. And one wrench can locking/unlocking various specs of bolts, besides, one pump can synchronously drive several bolts.

The working heads are quite safe for complete inclusion in design.

Ultra-light, ultra-thin and big torsion fit with various ″high difficulty ″space.

And considering your requirement for the special working condition, SAIVS can provide you the special hydraulic wrench and sockets.