Common Conveyor Roller Metric Dimensions

Below is a table summarizing typical conveyor idler roller dimensions using metric units. Belt conveyor idler rollers are critical components in belt conveyor systems, supporting the belt and material load. Dimensions vary based on application (e.g., light-duty, medium-duty, or heavy-duty), belt width, and standards like CEMA, ISO, or DIN. Our conveyor rollers are widely used in our mobile stacking conveyors and mobile ship loader conveyors. We will provide details of metric dimensions of conveyor idler rollers.

Conveyor Idler Roller Dimension Table (Metric)

Roller Diameter (mm)	Roller Length (mm)	Shaft Diameter (mm)	Belt Width (mm)	Load Capacity (kg)	Typical Application
63.5	200–600	15–20	400–500	50–200	Light-duty (e.g., small packages)
89	250–900	20–25	500–800	200–500	Medium-duty (e.g., aggregates)
108	300–1150	25–30	650–1000	500–1000	General-purpose (e.g., coal)
133	400–1400	30–35	800–1200	1000–2000	Heavy-duty (e.g., mining)
159	500–1800	35–45	1000–1600	2000–4000	Extra heavy-duty (e.g., ore)

Key Notes

Roller Diameter

Smaller diameters (63.5–89 mm) are for lighter loads or return idlers.
Larger diameters (108–159 mm) support heavier loads and reduce belt wear.

Roller Length

Matches the belt width plus additional length for mounting (e.g., 50–150 mm extra, depending on troughing angle and frame design).
Troughing idlers (e.g., 20°, 35°, 45° angles) typically have longer center rollers and shorter side rollers in a set.

Shaft Diameter

Increases with roller diameter and load to handle bending stresses.
Common shaft ends: flat, hex, or round with key-ways for mounting.

Belt Width

Standard widths align with ISO or CEMA (e.g., 400, 500, 650, 800, 1000, 1200, 1600 mm).
Roller length is typically 100–200 mm longer than the belt width.

Load Capacity

Depends on roller material (e.g., steel, HDPE), bearing type (e.g., deep groove ball bearings), and roller spacing (e.g., 1000–1500 mm for carrying idlers, 3000 mm for return idlers).

Materials

Steel (galvanized or painted) for durability.
HDPE or composite for corrosion resistance or lighter applications.

Additional Details

Idler Types

Carrying Idlers: Support the loaded belt (flat or troughed).
Return Idlers: Support the empty belt (flat or V-shaped).
Impact Idlers: Larger diameters (e.g., 133–159 mm) with rubber discs for loading zones.

Spacing

Carrying idlers: 1000–1500 mm apart.
Return idlers: 2000–3000 mm apart.

Standards

Dimensions often align with CEMA (Conveyor Equipment Manufacturers Association) or ISO 1537 for idler rollers.

We provide various specifications and models of mining conveyor rollers and aggregate conveyor rollers for your project. If you need specifics for a particular belt width, idler type (e.g., troughed, flat, impact), or industry standard, let me know, and I can refine this further! For precise specs and manufacturer catalogs, you can contact us.