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ZOOMRY

Engaged in conveyor system field more than two decades.

Conveyor Idler

CEMA B Unequal Troughing Idlers

Zoomry CEMA B Unequal Troughing Idlers are designed for belt conveyors requiring higher load capacity and stability in the loading zone. The unequal troughing angle (typically 20° or 35° outer wings with a shallower center) provides better material containment and reduces spillage compared to equal troughing idlers. Ideal for mining, quarrying, and aggregate applications.

Standard CEMA B (Medium duty) – rollers up to 4" or 5" diameter
Roller Diameter 4" (108mm) / 5" (127mm)
Belt Width Range 24" – 48" (610 – 1219 mm)
Troughing Angles 20° / 35° (standard); custom angles available
Sealing Grade IP66 / Labyrinth + contact seals
Service Life 40,000+ hours under normal conditions
Applications Mining, quarry, aggregate, cement, coal handling

※ Custom troughing angles and roller diameters available. Contact Zoomry for a tailored solution.

  • Product Detail

Product Overview

Zoomry CEMA B Unequal Troughing Idlers are engineered for medium‑duty belt conveyors where material containment and load support are critical. The unequal troughing design (shallower center roll with steeper outer wings) reduces belt edge spillage and improves belt tracking compared to standard equal troughing idlers.

Design Features

  • CEMA B rated – suitable for belt speeds up to 5 m/s and medium tonnage.
  • Precision steel pipe – high concentricity, dynamic balancing.
  • Advanced sealing system – multi‑stage labyrinth + contact seal, IP66 protection.
  • Heavy‑duty bearings – deep groove ball bearings (6204 – 6306) from SKF, FAG, ZWZ, or HRB.
  • Low rotation resistance – reduces belt tension and energy consumption.
  • Corrosion resistant – hot‑dip galvanizing, painting, or stainless steel options.

Dimensions – 20° Troughing Angle

BW (in) A (in) B (in) L1 (in) L2 (in) H1 (in) H2 (in) W (in) H1 (in) H2 (in) W (in) E (in) F (in) K (in)
24 33 35 15 7/16 5 7/16 7 9 1/16 26 15/16 7 1/2 9 7/16 26 9/16 6 8 1/2
30 39 41 21 3/8 5 7/16 7 9 1/16 32 7/8 7 1/2 9 7/16 32 1/2 6 8 1/2
36 45 47 27 3/8 5 7/16 7 9 1/16 38 7/8 7 1/2 9 7/16 38 1/2 6 8 1/2
42 51 53 33 3/8 5 7/16 7 9 1/16 44 7/8 8 9 15/16 44 1/2 7 1/2 9 1/2 5/8
48 57 59 39 3/8 5 7/16 7 9 1/16 50 7/8 8 9 15/16 50 1/2 7 1/2 9 1/2 5/8

※ Dimensions in inches. BW = Belt Width. For metric equivalents, contact Zoomry.

Dimensions – 35° Troughing Angle

BW (in) A (in) B (in) L1 (in) L2 (in) H1 (in) H2 (in) W (in) H1 (in) H2 (in) W (in) E (in) F (in) K (in)
24 33 35 13 1/4 6 3/4 7 11 25 7/16 7 1/2 11 3/8 24 7/8 6 8 1/2
30 39 41 15 7/16 8 15/16 7 12 1/4 31 1/4 7 1/2 12 5/8 30 11/16 6 8 1/2
36 45 47 21 3/8 8 15/16 7 12 1/4 37 1/8 7 1/2 12 5/8 36 9/16 6 8 1/2
42 51 53 21 3/8 11 1/8 7 14 40 3/16 8 14 3/8 40 3/4 7 1/2 9 1/2 5/8
48 57 59 27 3/8 11 1/8 7 14 46 3/4 8 14 3/8 46 7 1/2 9 1/2 5/8

※ Dimensions in inches. For metric equivalents, contact Zoomry.

CEMA B Unequal Troughing Idlers drawing Idler dimensions

※ For a custom CEMA B unequal troughing idler (other belt widths, special coatings, or metric dimensions), please contact Zoomry engineering team.

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