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Global Leaders in Conveyor Idler Manufacturing & Supply


ROKONMA ( DONGUAN ) CO.,LTD all rights reserved
Address: No. 1, Fifth Street, Yuanxin Industrial Park, Mowu Village, Qishi Town, Dongguan City

Frames, Brackets & Mine Structure


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Frames, Brackets & Mine Structure

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Frames, Brackets & Mine Structure

We use the latest robotic welding technology as part of our commitment to ensuring a first-class weld is performed time after time. We conform to all international welding code specifications AS 1 554 GP and AS 1554-SR.

We use Demmeler tables to assure our manufacturing tolerances are kept to the required standards, and that each jig is millimetre perfect. Our procedure also takes into account, the stress relieving process caused by the heat generated through the welding process, along with the stress caused by the hot dip galvanizing.

Steel is made to ASNZS3679 or equivalent Asian standard. Jig welding of the base frames ensures slotted mounting brackets are accurately aligned. All frames and brackets are hot dip galvanised to AS NZS-4680, which gives affective resistance to a Wide range of surface and underground environments.



Frames & Brackets – General Specifications

Frames and brackets are jig welded to idler bases to ensure the roller and troughing profile is maintained to within 2.0mm deviation.

Frames and brackets are designed and manufactured to prevent distortion under torsional loads, resulting from both wing rollers being jammed.

Impact idler bases of the heavy-duty retractable type, can be provided.

Base frames are designed to self-shed material spilt from the belt.


Wind guard mounting holes are provided in idler wing brackets.

Trip wire pigtails share the wind guard holes.

Idler brackets are designed to allow fitting of retaining plates, clips and stone guards.

Frames and brackets are provided with elongated fixing holes to suit minimum fixing bolt size M12.

The clearance between idler rolls and frames are made sufficient to ensure that, should the rolling elements collapse with in the roll bearings, a clearance is maintained between the idler rolls and frames.

Brackets are slotted to accommodate drop-in dead shaft type rollers.

Bracket slots are neat fitting to prevent rattling components during operation.

In-line idlers have minimum end gaps between rollers to alleviate belt pinching.

Trough idler frames for belts wider than 900mm are fitted with a diagonal brace between the outer support and the cross member.


Frames & Brackets - Surface Treatment

Frames and brackets are grit blasted to class 2 and hot dip galvanized, to AS NZS-4680 or equivalent Asian standard, for greater corrosion resistance and durability in a Wide range of surface and underground environments. Thickness is 450-600g/m2 Mechanical cleaning followed by enamel paint is available on request.


Special epoxy painting to suit corrosive environments where galvanizing is not suitable, such as gold mines and salt water is also available.


Mine Structure


HD Suspended Sets Assy.


HD Drop Down Impact Sets Assy.


HD Rigid Suspended Sets Assy.