Tyton Conveyors. Australia's leading designer & manufacturer of belt conveyor components.

Leading Australian Designer and
Manufacturer of belt conveyor
components for a wide variety of
bulk material handling applications

TYTON IDLER FEATURES: (see also Standard Idler Spec Sheets)

1. Shells are made standard from 3.2mm (dia 102, 114mm and 127mm) and 4.0 (dia 152).
    Other manufacturers usually use 2.8mm. Thicker shells can be provided on request.
    Material ERW 200/350 Range to AS1450.
2. End Discs are welded into the machined tube ends, similar to a pulley construction. This
    method ensures that any shell wear is not wearing away the weld as happens with other
    major suppliers techniques. Material AS1594 HA3P.
3. Tyton End Housing Weld Details 3mm continuos fillet performed on a double ended PLC
    operated MIG welding machine, to AS 1554GP.
4. Shafts are always stepped, i.e. larger diameter between bearings than at the bearing. This
    eliminates shaft deflection which causes premature bearing failure. (Other manufacturers
    use parallel bright shaft, with no step) Bearing journals are precision ground. Material
    AS3679 GR250.
5. Shaft Retention is positive using seal circlips both ends to prevent shell "walking off' the shaft,
    which is a common occurrence with other manufacturers, who only retain one end, or rely on
    total interference fit to hold the assembly together.
6. Expansion and Contraction is made possible by 0.25mm maximum clearance at the
    circlips, allowing the shaft to slide in the bearing inner race without loading up the balls on
    the outer race. The outer race is an interference fit in the housing to prevent bearing flogging
    out the housing. Other manufacturers relying on total interference for assembly do not have
    provision for expansion and contraction.
7. Breather Hole: Tyton provide a breather hole in the shell end (one end only), and the roller
    marked suitably to ensure correct fitment in the wing location.
8. Seals (Inner)
    (a) Integral with ZZ Bearing. This prevents any ingress of contaminates from within the shell.
    We control the type of grease.

     (b) All Idler Rollers (Outer) The outer seal comprises a cartridge type seal which fills in the "well area"
     (2 fixed and 2 rotating labyrinths can still be supplied if required), followed by a
    PVC outer water/dust line contact seal. The outer seal is totally acceptable to the
    Department of Mineral Resources for use in underground mines in NSW and QLD, and also
    formulated for long term UV exposure.
    It should be noted that the outer water/dust line contact seal can cause high drag unless it is
    correctly put on. Tyton uses a special setting dolly to ensure correct lip contact pressure.
9. Bearings are single row deep groove ball ZZ with C3 or C4 clearance, of N.S.K, Koyo or
    NACHI brand, made in Japan (greased for life).
10. Grease is lithium base with very good resistance to water
    wash out and offers mid range rotational resistance.
11. Frames and Brackets are hot dipped galvanised as a normal production line,
     450-600g/m2 thickness.
12. Roller Ends are solvent cleaned followed by one coat of Tyton red enamel, UNO
13. Tolerances are per the figures listed in Catalogue extracts.
14. Date of Manufacture is embossed on one end of the shaft.
15. Idler Design Selection is done by computer aid.
16. Rim Drag (Rotational Resistance)
    The free running Tyton roller ensures no differential speeds ("scuffing") between the belt
    and the roller which reduces shell wear dramatically. Drag figures are available on request.

STANDARD IDLER RANGE
Select the thumb nail image to see a full specification sheet