Industrial seal self study guide - SKF.com

85. Imperfections such as surface burrs, nicks or rough spots on the shaft surface
can damage the lip as it slides on the shaft.
❑ True ❑ False
x
86. The more pressure you apply to a seal, the greater the friction heat and
faster the shaft wear.
❑ True ❑ False
87. The temperature of the lubricant being retained is the only temperature reading
critical to seal selection.
❑ True ❑ False
88. Type HDSD seal has two opposing elements in a single shell, making it ideal
for separating two fluids in applications where two seals are practical.
❑ True ❑ False
89. Applications for SKF’s LongLife fluoroelastomers are limited to standard lubricants.
❑ True ❑ False
90. Speedi-Sleeve’s stainless steel construction provides a surface that can outlast
the original shaft material
❑ True ❑ False
91. In SKF’s single lip vs. double lip test, the single lip outlasted the double lip by
nearly 1000 hours.
❑ True ❑ False
92. The heavy-duty DF seal has a special retainer to hold the two sealing ring faces
together for protection against damage or contamination.
❑ True ❑ False
93. For out-of-round shaft repairs, a Speedi-Sleeve or SKF Large Diameter Wear
Sleeve is often a better solution than shaft removal and reshaping.
❑ True ❑ False
94. The V-Ring’s elastic body adheres to the rotating shaft while the actual sealing
occurs at the point of contact between the lip and the counterface.
❑ True ❑ False
95. More than one Speedi-Sleeve size is usually required for each seal application.
❑ True ❑ False
105