1. Product Overview

ZOOMRY impact rollers are rubber-ring idlers designed for conveyor loading and transfer zones where falling material creates repeated impact on the belt. Compared with standard steel rollers, the resilient rubber-ring surface provides localized cushioning at the belt contact area, helping reduce impact-related stress on the belt and idler assembly. They are commonly used below crusher discharge points, transfer chutes, and feed zones in mining, quarry, and bulk-material handling systems.

ZOOMRY impact rollers are available in selected diameters from 89mm to 219mm. Standard configurations include 89mm, 108mm, 133mm, 159mm, 194mm, and 219mm; other dimensions may be evaluated according to the loading-zone duty and project requirements. For high drop heights, large lump sizes, or heavy impact energy, impact rollers are often combined with conveyor impact beds and skirtboard sealing for comprehensive belt protection.

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2. How Rubber-Ring Cushioning Works

At a conveyor loading zone, material drops from a crusher, feeder, or preceding conveyor onto the belt surface. Each impact creates a localized stress concentration at the contact point. A standard steel roller has minimal deformation capacity — the impact force is transmitted almost directly to the belt carcass and roller bearings, accelerating wear and splice fatigue over time.

The impact roller addresses this through rubber rings bonded to the steel roller shell. When material strikes the belt above the roller, the rubber rings compress slightly, spreading the impact force over a larger contact area and a longer time interval. This reduces the peak stress on the belt and idler assembly. For extreme impact conditions, impact rollers are typically supplemented by impact beds to provide additional belt support and energy absorption.

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3. Key Features

Rubber-Ring Cushioning Surface — Resilient rubber rings provide localized belt cushioning at impact points, helping reduce belt and idler assembly stress in aggregate crusher discharge applications.

Wear-, Impact-, and Aging-Resistant Surface — Rubber rings are heat-cured to the steel shell for adhesion under repeated impact loading, helping extend service intervals in loading-zone duty.

High Loading Capacity — Steel shell and bearing configuration designed to support material loading at transfer points, subject to the selected roller diameter and bearing size.

Effective Labyrinth Sealing — Multi-stage labyrinth seals protect bearings from dust and moisture ingress in dusty coal and mineral processing environments.

Sealed Ball Bearings — Maintenance-friendly sealed bearing design reduces lubrication requirements, subject to the site maintenance plan and operating conditions.

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4. Impact Roller vs Standard Steel Roller

Feature	Impact Roller	Standard Steel Roller
Roller Surface	Rubber rings bonded to steel shell	Smooth steel shell
Impact Cushioning	Localized rubber-ring compression	Minimal — rigid steel surface
Best For	Loading zones, crusher discharge, transfer points	Standard carrying and return sections
Typical Spacing	Typically closer spacing, often 300–450mm centers, subject to conveyor and loading-zone design	Standard carrying spacing (1–1.2m)

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5. Production Specifications

The following table shows the production diameter range available for evaluation. Standard configurations for impact rollers include 89mm, 108mm, 133mm, 159mm, 194mm, and 219mm; other dimensions may be considered according to the loading-zone duty and project requirements:

No.	Standard Diameter		Length Range (mm)	Bearing Type	Shell Wall Thickness
	mm	Inch		Min–Max
1	63.5	2 1/2	150 – 3500	203, 204	3.0 – 4.0 mm
2	76	3		204	3.0 – 4.5 mm
3	89	3 1/2		204, 205	3.0 – 4.5 mm
4	102	4		204, 205, 206, 305	3.2 – 4.5 mm
5	108	4 1/4		204, 205, 206, 305, 306	3.5 – 4.5 mm
6	114	4 1/2		204, 205, 206, 305, 306	3.5 – 4.5 mm
7	127	5		204, 205, 206, 305, 306	3.5 – 5.0 mm
8	133	5 1/4		204, 205, 206, 207, 305, 306	3.5 – 5.0 mm
9	140	5 1/2		205, 206, 207, 305, 306, 307	3.5 – 5.0 mm
10	152	6		205, 206, 207, 305, 306, 307, 308	4.0 – 5.0 mm
11	159	6 1/4		205, 206, 207, 305, 306, 307, 308	4.0 – 5.0 mm
12	165	6 1/2		206, 207, 305, 306, 307, 308	4.5 – 6.0 mm
13	177.8	7		207, 306, 307, 308, 309	4.5 – 6.0 mm
14	190.7	7 1/2		207, 306, 307, 308, 309, 310	4.5 – 7.0 mm
15	194	7 5/8		207, 306, 307, 308, 309, 310	4.5 – 8.0 mm
16	219	8 5/8		308, 309, 310, 312	4.5 – 8.0 mm

Production diameter range shown for evaluation. Impact rollers are standardly configured in 89mm, 108mm, 133mm, 159mm, 194mm, and 219mm diameters; other diameters may be considered according to project requirements. Exact roller length, bearing type, and shell wall thickness are confirmed during quotation. Custom configurations available on request.

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What Information Do We Need for Impact Roller Selection?

• Belt width, conveyor capacity, and material lump size
• Drop height and impact severity at the loading zone
• Roller diameter and bearing size required for the application
• Operating environment — dust, moisture, temperature range, and material abrasiveness
• Existing roller dimensions and mounting arrangement for retrofit compatibility

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