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Rollers series 308

Rollers series 308

Rollers series 308

Product catalog summary
Overview: The document provides technical specifications and details for the Rolls Series 308 and 308S, designed for belt conveyors handling medium loads and lump sizes in challenging environments. These rollers are equipped with 6202 precision bearings, greased for life, and protected by ERMEX C6 seals.
Specifications: The rollers are available in various dimensions and weights, as detailed in the tables. They are designed for interchangeability with other series using CH17 attachments. The rollers can operate in normal temperature ranges (-10°C to +90°C) and can be specially lubricated for extreme temperatures (TB: -30°C to -10°C, TE: +90°C to +150°C).
Construction: Standard rollers feature a plain tube with galvanized shields. The tube is swaged over cartridge bearing housings for durability. Special materials can be requested for extreme conditions.
Denomination: The full denomination includes the code number, finish, lubrication reference, and length in mm. Example: 308033.ZB L258.
Weight Calculation: The weight of a roller (Pr) is calculated using the formula: Pr = L · a + f [kg], where 'L' is the length, 'a' is the weight per mm, and 'f' is the fixed weight.
Rated Loads: The document provides a table of rated loads for a lifespan of 10,000 hours, with adjustments for longer lifespans using a coefficient 'C'.
Performance: The rollers are designed to maintain performance across various speeds and loads, with specific values provided for different diameters and lengths.
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Catalog excerpts

Rollers series 308-2

Questi rulli sono stati progettati per l’impiego in trasportatori a nastro, con carichi e pezzature medi, anche in cattive condizioni ambientali. Sono montati su cuscinetti di precisione 6202, di marca primaria, lubrificati a vita ed efficacemente protetti dalle sperimentate protezioni ERMEX C6, che contengono una tenuta stagna con recupero d’usura. II montaggio al trasportatore avviene con l’ausilio dei supporti e delle traverse presentate nei capitoli M10 e M11. These rollers are particularly designed for belt conveyors with medium loads and lump sizes even in unfavourable environmental conditions....

 Open the catalog to page 2
Rollers series 308-3

Peso al mm Weight per mm Peso fisso L min L max Esecuzioni a richiesta  Executions upon request Peso di un rullo completo Weight of a complete roll Il peso Pr del rullo può essere calcolato mediante la formula: Pr = L · a + f [kg] (Peso delle parti rotanti) [kg] (Weight of rotating parts) The weight Pr of a roller can be calculated according to the formula below: Pr = L · a + f [kg]

 Open the catalog to page 3
Rollers series 308-4

Questi rulli sono stati progettati per l’impiego in trasportatori a nastro, con carichi e pezzature medi, anche in cattive condizioni ambientali. Sono montati su cuscinetti di precisione 6202, di marca primaria, lubrificati a vita ed efficacemente protetti dalle sperimentate protezioni ERMEX C6, che contengono una tenuta stagna con recupero d’usura. II montaggio al trasportatore avviene con l’ausilio dei supporti e delle traverse presentate nei capitoli M10 e M11. These rollers are particularly designed for belt conveyors with medium loads and lump sizes even in unfavourable environmental conditions....

 Open the catalog to page 4
Rollers series 308-5

Peso al mm Weight per mm Peso fisso L min L max Esecuzioni a richiesta  Executions upon request Peso di un rullo completo Weight of a complete roll Il peso Pr del rullo può essere calcolato mediante la formula: Pr = L · a + f [kg] (Peso delle parti rotanti) [kg] (Weight of rotating parts) The weight Pr of a roller can be calculated according to the formula below: Pr = L · a + f [kg]

 Open the catalog to page 5
Rollers series 308-6

RATED LOADS La tabella seguente riporta i valori già calcolati in funzione di n e di L, per una durata di progetto di 10.000 ore. Per una durata superiore, ridurre i carichi moltiplicandoli per il coefficiente C. Codice Code The table below shows the loads of the rollers for a rated life of 10.000 hours as a function of the R.p.m. n and the length L. For longer rated lives loads are to be reduced by multiplying for C coefficient.

 Open the catalog to page 6
*Prices are pre-tax. They exclude delivery charges and customs duties and do not include additional charges for installation or activation options. Prices are indicative only and may vary by country, with changes to the cost of raw materials and exchange rates.