Overview
ISO 1816:1975 specifies the basic characteristics of motorized driving pulleys used on belt conveyors for continuous handling of loose bulk materials and unit loads. First published in 1975 (transforming ISO Recommendation R 1816-1970 into an International Standard), the document defines preferred pulley diameters, pulley lengths relative to belt width, power ratings, and nominal belt speeds. It is intended as a dimensional and selection reference rather than a detailed design standard.
Key topics and requirements
- Scope: Basic characteristics (dimensions, power rating, nominal speed) for motorized driving pulleys on belt conveyors.
- Nominal diameters (mm): 160, 200 (215), 250, 315, 400, 500, 630, 800 (values given in millimetres).
- Pulley lengths: Pulley length L is specified relative to belt width b. Example pairs (mm):
- b = 300 → L = 400
- b = 400 → L = 500
- b = 500 → L = 600
- b = 650 → L = 750
- b = 800 → L = 950
- b = 1000 → L = 1150
- b = 1200 → L = 1400
- Power ratings (kW): 0.37, 0.75, 1.1, 1.5, 2.2, 3, 4, 5.5, 7.5, 11, 15, 18.5.
- Nominal speeds (m/s): 0.25, 0.32, 0.4, 0.5, 0.63, 0.8, 1, 1.25, 1.6, 2, 2.5, 3.15.
- Selection guidance: Manufacturers may choose pulley diameter, power rating and speed from the listed tables. Note that shaft dimensions are not specified in this standard.
- Reference to preferred numbers: Values align with the R10 series of preferred numbers (see ISO 3).
Practical applications
- Standardizes selection criteria for motorized driving pulleys used in industrial belt conveyor systems.
- Helps conveyor OEMs and system designers specify compatible pulley diameters, lengths, motor power ratings and operating speeds for handling bulk materials and unit loads.
- Useful for procurement and specification documents to ensure cross-manufacturer compatibility and simplified spare parts selection.
- Supports maintenance teams and plant engineers when replacing or upgrading driving pulleys to match existing belt widths and conveyor speeds.
Who should use this standard
- Conveyor manufacturers and component suppliers
- Mechanical and conveyor system designers
- Plant maintenance and reliability engineers
- Procurement and specification writers for mining, aggregates, ports, bulk material handling, and general material transport industries
Related standards
- ISO 3 (Preferred numbers) - referenced for series of preferred values.
- Other conveyor and handling equipment standards (consult ISO/TC 101 publications for broader conveyor system standards).
Keywords: ISO 1816:1975, motorized driving pulleys, belt conveyors, pulley dimensions, nominal diameter, power rating, nominal speed, bulk materials handling, conveyor design.