A study of the relative efficiencies of lubricating oils . t, and 33000, thenumber of foot pounds of v/ork per minute in a horse power. After having used the graphite mixture on the bearing,the test of tie pure oil was repeated, but it was impossible to detect any variation in the coefficient of friction, dueto this cause. This may, however, Toe due to tlie fact that thehearing had hecome highly polished and well worn hy previoususage so that the surface afforded no microscopic irregular-ities for the lodgement of particles of graphite. If thebearing had heen new it is very prohahle that the f
A study of the relative efficiencies of lubricating oils . t, and 33000, thenumber of foot pounds of v/ork per minute in a horse power. After having used the graphite mixture on the bearing,the test of tie pure oil was repeated, but it was impossible to detect any variation in the coefficient of friction, dueto this cause. This may, however, Toe due to tlie fact that thehearing had hecome highly polished and well worn hy previoususage so that the surface afforded no microscopic irregular-ities for the lodgement of particles of graphite. If thebearing had heen new it is very prohahle that the frictionwould have heen decreased hy the application of graphite. -9- TEE PRIITCIPAL PARTS OP THE miAllDIIETER A. j?her2iometer in outgoing water. B. Tliermorjieter in ingoing v;ater. C. Thermometer in l^earing. D. Apparatus for keeping 1068211 horizontal. E. Spring Oil cup. Cx. Bearing with water jacket. H. Motor. I. Tank. J. Valve for regulating flow of cooling Pointer showing position of beam v/ith respect to CALCUIATIOII Oj? C0E3??ICII2TT OlP :?KICTIOITAlTD FRICTIOIT LOSSESW = v;eight on = pull on spring balance.^ = R. P, }1, of s3iaft. K = constant depending on dia:Tieter of bearing and ratio between lever anns = C = coefficient of / 0 — ( = ratio of lever arms). W TT P - i-a^^IT _ 33000 OP iLLinois n EnG. LaSORATORV ( Comparative LuBRicATion Test Total Load on BcAR/no ^ ^ 3 Pounos per onLubricant/?<6*/?gkv^ e^^/^ci n// Drop^ per riiriuTg. no. or Reads Tl M E Put 1Los. r\. r. 1 1. weiGn 1 or WATERO LBS. Water. DRG Irs Out J /.\?^~ AB50RBED BY Water. o 2 / 3 c?-? 3 6 / 3/0 4 2: / Zj.^ f. 3-7 /3^o. 5 2: / v$- /2S^b- / .^^ /3/0 6 a: zo 1 /3/a H P Con SUM EDBV 74 7 /.3j /306 8 2. / /.3j / 290 9 1 3 2.^ / 3oo /O /• 3 J /3C4 CoEFF/cieriTOF PRiCTion f/ /30^ /a 2 : N^Tc? /32 0 13 / 3^.0 /3o2 / ^ Qelar
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Keywords: ., bookcentury1900, bookdecade1900, booksubjecttheses, bookyear1909
