1. Product Overview

ZOOMRY CEMA D equal troughing idlers are heavy-duty carrying side components with symmetrical three-roller design for maximum load capacity. Built to CEMA D standards for mining and bulk material handling, these troughing idlers feature three equal-length rollers at 20°, 35°, or 45° trough angles — providing uniform belt support with enhanced frame geometry for conveyors up to 72-inch belt width.

Equal troughing idlers are the most widely specified carrying side idler — the industry standard for continuous bulk material transport. The symmetrical roller design distributes material weight evenly across the Conveyor Belt, maximizing load capacity while minimizing belt stress at idler junction points. Available with 5-inch and 6-inch diameter rollers for belt widths from 24 to 72 inches.

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2. Equal vs Unequal Troughing: Key Differences

Feature	CEMA D Equal Troughing (D9)	CEMA D Unequal Troughing
Roller Configuration	3 equal-length rollers (symmetrical)	L1 (long center) + L2 (short wings)
Primary Advantage	Maximum load capacity, uniform weight distribution	Enhanced belt tracking, reduced edge wear
Belt Support	Uniform across full belt width	Offset — more support at center
Best For	Standard conveyor sections, uniform materials, max capacity	Irregular materials, tracking-prone sections

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3. Key Features

Symmetrical Equal-Length Rollers — Three identical rollers distribute material weight uniformly, maximizing load capacity for cement and aggregate conveyor carrying sections.

CEMA D Heavy-Duty Rating — 5-inch and 6-inch diameter rollers with enhanced frame geometry for belt widths up to 72 inches — the most widely specified carrying idler configuration.

Three Trough Angles — Available in 20°, 35°, and 45° to match material characteristics and throughput requirements. Higher angles increase cross-sectional area and capacity.

Advanced Labyrinth Sealing — Multi-stage seals protect bearings from dust and moisture in coal and mineral processing environments.

Industry Standard Design — The most widely specified carrying side idler, compatible with all CEMA D conveyor structures for easy replacement and global spare parts availability.

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4. Application Scenarios

High-Capacity Mining — Iron ore, copper, and bauxite conveyors in mining operations where maximum tonnage requires equal troughing for consistent belt support on 48-72 inch belts.

Overland Conveyors — Long-distance sections transporting coal and aggregates. Equal troughing provides stable, predictable support over kilometers of conveyor length in coal and mineral transport.

Port & Terminal — Port import/export conveyors where standardized CEMA D idlers ensure spare parts compatibility across global terminals.

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5. Dimensions – CEMA D Equal Troughing 20° / 35° / 45°

ZOOMRY CEMA D equal troughing idlers are manufactured with 5-inch and 6-inch roller configurations for belt widths from 24 to 72 inches at all three standard trough angles:

				5" Roller			6" Roller
Angle	BW	A	B	L	H1	H2	W	H1	H2	W	E	F	K
20°	24	33	35	9 1/16	8 1/2	11 11/16	27 5/8	9	12 1/8	27 5/16	6	9 1/2	1/2
	30	39	41	11 1/8	8 5/8	12 9/16	33 3/8	9 1/8	13 1/16	32 15/16	6	9 1/2	1/2
	36	45	47	13 1/4	8 5/8	13 5/16	39 7/16	9 1/8	13 3/4	39 1/8	6	9 1/2	1/2
	42	51	53	15 7/16	9	14 7/16	45 3/4	9 1/2	14 7/8	45 7/16	7 1/2	9 1/2	5/8
	48	57	59	17 1/16	9	14 7/8	50 5/8	9 1/2	15 3/8	50 5/16	7 1/2	9 1/2	5/8
	54	63	65	19 1/16	9	15 3/4	56 7/16	9 1/2	16 1/8	56 1/16	9	11	5/8
	60	69	71 1/2	21 1/16	9	16 1/2	62 3/16	9 1/2	16 3/4	61 7/8	9	11	5/8
	72	81	83 1/2	26	9 1/2	18 3/8	76 3/16	10	18 7/8	75 13/16	9	11	5/8
35°	24	33	35	9 1/16	8 1/2	13 13/16	24 11/16	9	14 3/16	24 1/8	6	9 1/2	1/2
	30	39	41	11 1/8	8 5/8	15 3/16	30 3/8	9 1/8	15 11/16	29 13/16	6	9 1/2	1/2
	36	45	47	13 1/4	8 5/8	16 3/8	35 15/16	9 1/8	16 13/16	35 7/16	6	9 1/2	1/2
	42	51	53	15 7/16	9	18 1/16	41 3/4	9 1/2	18 7/16	41 3/16	7 1/2	9 1/2	5/8
	48	57	59	17 1/16	9	18 7/8	45 13/16	9 1/2	19 1/4	45 1/4	7 1/2	9 1/2	5/8
	54	63	65	19 1/16	9	20	51 1/8	9 1/2	20 7/16	50 1/2	9	11	5/8
	60	69	71 1/2	21 1/16	9	21 3/16	56 3/8	9 1/2	21 9/16	55 13/16	9	11	5/8
	72	81	83 1/2	26	9 1/2	24 7/16	69 9/16	10	24 7/8	69 1/16	9	11	5/8
45°	24	33	35	9 1/16	8 1/2	15 1/16	22 3/4	9	15 7/16	22 1/16	6	9 1/2	1/2
	30	39	41	11 1/8	8 5/8	16 3/4	28 1/16	9 1/8	17 1/16	27 3/8	6	9 1/2	1/2
	36	45	47	13 1/4	8 5/8	18 3/16	33 1/8	9 1/8	18 9/16	32 5/16	6	9 1/2	1/2
	42	51	53	15 7/16	9	20 1/8	38 7/16	9 1/2	20 1/2	37 11/16	7 1/2	9 1/2	5/8
	48	57	59	17 1/16	9	21 3/16	42 1/16	9 1/2	21 9/16	41 3/8	7 1/2	9 1/2	5/8
	54	63	65	19 1/16	9	22 7/8	46 15/16	9 1/2	23	46 3/16	9	11	5/8
	60	69	71 1/2	21 1/16	9	24 1/16	51 3/4	9 1/2	24 3/8	51	9	11	5/8
	72	81	83 1/2	26	9 1/2	28	63 15/16	10	28 5/16	63 1/4	9	11	5/8

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