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The most desired effect from applying a lube is to establish as durable boundary layer on the top surfaces of the friction pair as possible to prevent the excessive wear. Revolubes technology is aimed exactly at this target and to show off, we have conducted a simple experiment that can be carried out on any lubricant or grease to compare their lubrication properties visually and quantitatively.

This test can be considered a derivative of 4-ball apparatus test, as per ASTM D-2266. It also reflects the conditions of a chain roller running up a sprocket tooth as well as the contact between a roller and its bushing or pin to plate connection.

In this test a stationary bearing’s roller of a diameter of 9.5 [mm] is being pressed against a rotating cylinder with increased force (measured on a scale), until it reaches a value at which the lubricating wedge (oil film) is broken and the roller and the cylinder get welded together.

The dynamometer was installed on a quasi - falex lever, with a ratio of 10:1 – Meaning, the actual force pressing the roller against the cylinder was 10 times greater than the force indicated by the scale. The lubrication performance was assessed by the size and depth of the formed groove on the stationary roller. The amperemeter connected to the electric engine clamps, indirectly indicates the resistance the engine must overcome.

At the first instance, test was carried out without using any lubricant. The welding force at the contact surface was 300 [N] ~ 30 [kg].

At the second attempt the pair was lubricated with popular, widely accessible chain lube.  Breaking the lubricating wedge and welding the two parts occurred at a force of 350 [N] ~ 35 [kg].

The third test was conducted using Revolube™ Chain Lube. With a maximum force of 1500 [N] ~ 150 [kg], which could have been applied to the system, the rotation could not be stopped, constituting a preserved lubrication wedge.

Moreover, the value of the friction force has not been substantially increased, even due to significant load differences. The ampere-meter, which indicated the value of current flowing to the electric motor driving the cylinder, indicated the value has increased only slightly (about 1 [A]), against a significant change in force - from 300 [N] to 1500 [N].

The mark of the groove was significantly smaller, as illustrated in table and pictures below. The snapshot video from the test is also available below.

Tested Lubricant

Value of the limit force [N]

Size of the groove in the roller [mm]

No lubrication

300

9x5

Popular Chain Lube

350

8x4

Revolubes Chain Lube

>1500

4x2,5

 

Revolubes - test sample 1Revolubes - test sample 2

1 - No lubrication groove, 2 - Popular lube groove, 3 - Revolubes Chain Lube groove Note the heat marks on samples 1 and 2. 

Revolubes quasi -falex test bench.