Industrial seal self study guide - SKF.com

Wear Sleeves (cont.)
Speedi-Sleeve installs easily,
without excessive machine
downtime (fig. 6c).
Averaged caliper measurements
of shaft diameters at three positions
will compensate for out-of-round
conditions (fig. 6d).
Speedi-Sleeves ®
The Speedi-Sleeve is a cost-effective alternative to resizing,
metallizing or replacing the severely damaged surface because it
installs easily, without excessive machine downtime (fig. 6c).
Speedi-Sleeve is a highly engineered component, precision
manufactured of 300 series stainless steel. Its surface is factory
finished to 10-20 micro inch Ra (.25 to .50μm), with no machine
lead, and requires no expensive shaft preparation or machining before
installation. Once in place on the shaft, Speedi-Sleeve provides a
sealing surface that is superior to most original shaft finishes and
materials.
Typically, when a wear sleeve is installed over the shaft, the
new surface is thicker and requires a larger-sized seal. The wall of the
Speedi-Sleeve is so thin that the original size seal can still be used. Its
stainless steel construction provides a surface that can outlast the
original shaft material.
Each sleeve is built with a removable flange and includes a special
tool for installation. This tool is placed over the Speedi-Sleeve. Both the
tool and sleeve are tapped into position on the shaft. The flange allows
the sleeve to be pulled on instead of pushed on, eliminating sleeve
distortion.
When the Speedi-Sleeve is in position, the tool slides off easily. The
flange can be left intact, or cut and peeled off along a pre-cut line.
It takes only a few Speedi-Sleeves to meet the needs of even the
biggest operators. In most cases, there is no need to stock more than
one size sleeve for each seal application or location.
Speedi-Sleeve Size Selection
Correct Speedi-Sleeve size selection requires that three measurements
of shaft diameter be taken and averaged. Use a caliper and measure
at three positions: noon and 6 o’clock, 2 and 8 o’clock, and 4 and 10
o’clock. Take these measurements at a point on the shaft ahead of the
wear path. Find the average of the three readings.
The average will compensate for out-of-round shaft conditions as
well as indicate the approximate shaft diameter (fig. 6d). When that is
determined, refer to the SKF Handbook of Seals to select the correct
Speedi-Sleeve part number.
54