Rubber Lagging Pulley Questions on Materials, Fit and Test Data

It adds a rubber layer to a steel conveyor drum. The layer helps reduce metal wear and protect the conveyor belt. The covering can be applied by hot vulcanization or cold bonding.

NBR, CR, HYPLON, PU, SBR, and SR can be used. Material selection can be customized according to the operating environment and product design requirements.

For an oil-exposed conveyor area, include the operating environment in the specification request so the suitable material can be considered. The same information is useful when the pulley has particular design requirements.

Provide the conveyor belt width and the existing pulley or drum drawing. The parameter drawing identifies dimensions including Φ1, Φ2, L, L1, L2, D1, D2, D3, t1, t2, a, m, h, b, n, u, and v.

When replacing an installed pulley, measure the existing assembly and send the drawing with the belt width. This allows the drum geometry and rubber covering to be reviewed together.

Surface rubber data includes tensile strength, elongation at break, permanent set of pull-apart, Shore A hardness, abrasion loss, and aging coefficient. Bottom rubber data includes tensile strength, elongation at break, anti-breakdown strength, and adhesion strength between rubber and metal. Adhesion after heat treatment is also included.

The listed surface results include 20 MPa tensile strength, 317% elongation at break, 24% permanent set of pull-apart, 88 mm³ abrasion loss, and a Shore A hardness value of 70 for the stated pulley condition. Bottom rubber results include 30 MPa tensile strength, 330% elongation at break, 80 MPa anti-breakdown strength, and 4.9 MPa adhesion strength between rubber and metal.

Send the belt width, pulley or drum drawing, operating environment, product design requirements, and preferred covering process. State whether hot vulcanization or cold bonding is requested, and identify the preferred rubber material if it has already been selected.

For a replacement inquiry, include the existing assembly dimensions and drawing. For a new conveyor design, send the belt width, drum dimensions, operating conditions, and required performance data for review.