A COMPARISON OF DIFFERENT VISCOSITY SCALES Kinematics viscosity

A COMPARISON OF DIFFERENT VISCOSITY SCALES Kinematics viscosity centistokes 5 6 7 8 9 10 125 15 20 25 30 35 40 50 75 100 150 200 250 300 500 750 1000 Redwood No. 1 seconds Saybolt Universal seconds Engler degrees 38 40 40 45 1. 35 1. 4 45 50 55 60 70 80 90 100 125 150 200 300 500 700 1000 2000 50 55 60 70 80 90 100 125 150 200 300 500 750 1000 2000 5000 1. 6 1. 7 1. 8 1. 9 2 2. 5 3 3. 5 4 5 6 8 10 12. 5 15 20 30 40 50 75 1000 5

ISO 점도 등급 등급 2 3 5 7 10 15 22 32 46 68 100 150 220 320 460 680 1000 1500 중간점도 (c. St @ 40ºC) 2. 2 3. 2 4. 6 6. 8 10 15 22 32 46 68 100 150 220 320 460 680 1000 1500 최소 1. 98 2. 88 4. 14 6. 12 9. 0 13. 5 19. 8 28. 8 41. 4 61. 2 90 135 198 288 414 612 900 1350 점도 범위 최대 2. 42 3. 52 5. 06 7. 48 11. 0 16. 5 24. 4 35. 2 50. 6 74. 8 110 165 242 352 506 748 1100 1650

SAE VISCOSITY GRADES FOR ENGINE OILS 1 (SAE J 300 MAR 93) Viscosity (c. P) at Temp (o. C), Max. SAE Viscosity Grade OW 5 W 10 W 15 W 20 W 25 W 20 30 40 50 60 Cranking 3, 250 at -30 3, 500 at -25 3, 500 at -15 4, 500 at -30 6, 000 at -30 Pumping 30, 000 at -35 30, 000 at -30 30, 000 at -25 30, 000 at -20 30, 000 at -15 30, 000 at -10 Viscosity 4 (c. St) at 100 o. C Min. Max. 3. 8 4. 1 5. 6 9. 3 12. 5 <9. 3 <12. 5 <16. 3 21. 9 <26. 9

Polymer Thickening Multigrades Are Polymer-Thickened, Which Reduces Rate of Viscosity Reduction with Increase in Temperature Normal Base Oil Viscosity Polymer-Thickened Oil Temperature The Polymers Used for Multigrades Are Called “Viscosity Improvers”

SAE VISCOSITY GRADES (GEAR OILS) SAE Viscosity Grade 75 W 80 W 85 W 90 140 250 Maximum Temperature for Viscosity of 150, 000 c. P, o. C - 40 - 26 - 12 -------- Viscosity @ 100 o. C Minimum Maximum c. St 4. 1 7. 0 11. 0 13. 5 24. 0 41. 0 -----<24. 0 <41. 0 ----

A COMPARISON OF VISCOSITY CLASSIFICATIONS Kinematics Viscosity (c. St at 40 o. C) 2000 1000 800 600 500 400 300 200 ISO Viscosity Grades 1500 1000 880 460 320 220 150 100 80 100 60 50 40 46 30 22 20 15 10 8 6 5 4 3 2 68 32 10 7 5 3 2 SAE viscosity grades - engine oils 50 40 SAE Viscosity Grades - gear oils 250 140 30 90 20 10 W 5 W 80 W 75 W

점도지수 Shell Tellus 46 Shel Tellus TX 46

주 도(Penetration)

주 NLGI 액상 Class 고상 Worked Penetration 도 Description Typical Application (0. 1 mm , 25 C) 000 445 - 475 fluid 밀폐기어 00 400 - 430 semi fluid 밀폐기어 0 355 -385 very soft 중앙급지시스템 1 310 - 340 soft 중앙급지시스템 2 265 - 295 medium soft 볼, 롤러 베어링 3 220 - 250 medium 고속베어링 4 175 - 205 stiff 고속 저하중 베어링 5 130 - 160 very stiff 개방기어 6 85 - 115 block 개방기어

상용성 (Compatibility)

금속 마모분 (Metal Content)

CYLINDER LINERS (Fe, Si) CAM FOLLOWER (Fe, Cr) PISTONS (Sn PLATED MALLEABLE IRON) CAMSHAFT BEARING (Cu, Pb, Sn, Zn) CAMSHAFT (Fe) UPPER CONNECTING ROD BEARING (Cu, Pb, Sn) BLOWER ROTORS (Al, Si) CRANKSHAFT (Fe) CONNECTING ROD BEARINGS AND MAIN BEARINGS (Pb, Sn, Cu) PISTON RINGS FIRE AND COMPRESSION (Cr PLATED ) OIL CONTROL (Fe) Detroit Diesel Allison CRANKSHAFT AND CAMSHAFTS (Fe)

Oil Condition Change During Service 점도 TBN 금속분 불용해분 가동시간

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