h38 instructions
H38 Hinges

- Installation Instructions -


Each DUO H38 hinge is lightly lubricated prior to packing to assist installation.

Before operating any H25 hinge it must be properly assembled and lubricated using a high temperature (preferably water resistant) grease by using the grease nipple provided    A H38 hinge has been properly lubricated when a small amount of lubricating grease emerges at the bearing line of the hinge.

Before commencing the installation of the H38 hinges please read the whole of these instructions and ensure that any welding can be completed safely.

Please note that H38 hinges are coated with a grey weld through zinc and should be treated accordingly.


1.   H38 hinges are handed and each H38 hinge must be installed with the grease nipple uppermost.

Note:    As supplied the 7/8” stainless steel pivot axle of an H38 hinge is removable to enable the pivot to be removed prior to galvanizing a gate with H38 hinges fitted (for example) – in which case such coating material and debris must be excluded from all hinge cavities and bearing surfaces.


2.   Position each H38 hinge so that all are in the same alignment and accurately mark the positions of all flaps (and clamp the flaps in position).


3.   H38 hinge flaps may be drilled (and tapped) for fastening to a door or gate using 3 x M10 high tensile fasteners per flap or welded to the hanging post or jamb and and/or the gate or door respectively.


4.   Tack weld or securely clamp all hinges into position.

Note:      The pivot axles of H38 hinges are close fitting to enable minimal operating clearances between a door or gate and the opening it closes, however, it requires that positioning of the H38 hinges is accurate.


5.   Check the swing of the door or gate and ensure that that each hinge operates without binding and all hinges carry an equal load.


6.   Adjust the position(s) of the hinge(s) where necessary and repeat step 5.


7    When all necessary adjustments have been made, fully weld each hinge flap or complete installation of the M10 high tensile fasteners.

Note:       H38 hinge flaps are designed to enable a continuous weld along the edge of each flap - welding must only be applied to the flaps and to no other part of an H38 hinge.


8.   Disassemble each hinge and apply a thin coat of grease to the stainless steel pivot axle, reassemble the hinges and re-check proper operation of each hinge and the swing and closing of the door or gate.

Note:      To assist hanging of a door or gate, position one (or more) pivot axles “ahead” of the other(s).


9.   Before operating the door or gate to which the H25 hinges are installed, fully grease each hinge by means of their respective grease nipples.

Note:       To remove the cap from an H38 hinge to access the grease nipple, insert a small flat blade screwdriver between the top of the hinge and the cap and gently lever the cap upwards.    When lubrication of an H38 hinge is complete, press the cap back into the hinge until it attains its original position.


Modifications to this product and/or installation other than as described above will void all warranties and/or guarantees relating to this product.