High-frequency reciprocating rig

American Society for Testing and Materials. 1995. Standard test method for evaluating lubricity of diesel fuels by the high-frequency reciprocating rig (HFRR). Draft of proposed method. Philadelphia. 

Hydrocarbons. Fatty Add Methyl Esters, inder Lubricity Evaluator. High Frequency Reciprocating Rig. Ball-on-Cyl- ... 

Film formation properties of lubricating fluids containing selected experimental VI improvers was determined using a high-frequency reciprocating rig (HFRR) according to the procedure outlined in SAE 2002-01-2793. Testing results are provided in Table 2. 

Anon. 2003e. In Annual Book of ASTM Standards, D 6079 Standard Test Method for Evaluating Lubricity of Diesel Fuels by the High-Frequency Reciprocating Rig (HFRR) (vol. 05.03). West Conshohocken PA ASTM International. 

HFRR, The high-frequency reciprocating rig SLBOCLE, scuffing load ball-on-cylinder lubricity evaluator. 

Boundary friction coefficients were measured at temperatures between 40 °C and 140 C using a High Frequency Reciprocating Rig (HFRR), as shown schematically in Figure 5. The test comprises a steel ball reciprocating against a steel disc at 20 Hz with a stroke length of 1 mm. A 4 N load was used in all tests. Friction coefficient and temperature are measured as a function of time. 

To investigate the anti-wear properties of the ring zone samples, the contact performance of the cold start samples is being evaluated using High Frequency Reciprocating Rig (HFRR) techniques. The very small samples required for each test are ideal for the small sample volumes available. Initial results from the HFRR test show reduced anti-wear performance for the initial cold start samples. The initial results are in accord with the results from the loss of other additives from the initial run period samples. The further results for the HFRR wear tests will be reported later elsewhere. 

The commonly apphed procedure for lubricity testing of petrodiesel and biodiesel is the high-frequency reciprocating rig as described in standards such as ASTM D6079 or ISO 12156. Lubricity has not been included in biodiesel standards despite the favorable behavior of biodiesel versus petrodiesel with respect to this fuel property. 

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