Choosing The Right Size
There are just a few simple steps to finding the sleeve you need. Clean, deburr and remove any raised edges from the diameter you want to repair. Take the average size by measuring three different locations on the diameter, and look in our Sizing Chart below for the closest “Nominal Shaft Diameter” to that size. Make sure the “ A – Shaft Diameter Range” falls within your diameter to find the part number you need.
To achieve the best results, please use care and attention. The Durasleeve is a thin walled sleeve designed to have a press fit. The mating surface must be free of all contaminants, burrs and any raised deformations.
The sleeve will not work if installed over splines, keyways, threads, or cross holes, since this will result in distortion of the sleeve, causing the seal to leak.
Never use heat to install. Using heat will cause the sleeve to deform and it may not return to its original size, resulting in an improper fit on the shaft.
1. Clean all surfaces where the seal contacts the shaft. File or emery all burrs and rough spots.
2. Measure the diameter of the worn and unworn parts of the shaft in 3 locations. FIG.A The average diameter should be within the range printed on the box label.
3. Mark the exact location on the shaft where the sleeve must be placed. Aim to have the seal run as close as possible to the center of the “functional width” of the Durasleeve.
4. If the shaft is deeply scored, fill the groove with a metal epoxy-type filler. Install the sleeve before the filler sets. Clean away any remaining filler from the sleeve outside diameter surface.
5. Only if the flange should be removed after installation, cut the flange from the outside diameter into the radius in one place. Do not remove the flange yet. The flange end of the sleeve goes on the shaft first. Then, place the installation tool over the sleeve. FIG.B
6. Lightly tap the middle of the installation tool until the sleeve covers the worn shaft surface FIG.C If the installation tool is too short, a length of squared-off, burr-free pipe or tubing can be used. Be sure that the inside diameter of the pipe is the same as that of the installation tool. Use care not to scratch the precision ground sleeve’s outside diameter.
7. The length of the sleeve must be fully engaged on the shaft with no overhangs. An overhanging sleeve can cause seal damage.
8. If the flange was cut for removal, use a pair of needle-nose pliers to grip the flange and twist it into a coil, being careful not to damage the sleeve or lift the end of the sleeve off the shaft which may cause a jagged edge. FIG.D Flange removal must be done with care to avoid damage to the outside diameter of the sleeve.
9. After installation, double-check for any sharp edges that could damage the seal.
10. Apply lubricant to the sleeve before installing the seal.
Extreme Wear Resistance
The surface hardness of the Durasleeve is 66 to 70 Rockwell C. What does that mean? Your standard speedy sleeve has a Rockwell C hardness of 16 (= 95 Rockwell B). The Durasleeve surface averages 68 Rockwell C, which significantly increases its longevity. This is because the harder surface resists abrasion and the embedding of foreign objects such as dirt, sand and grit. We didn’t call it the “DURA”Sleeve for nothing.
The microstructure of hard chrome creates indistinguishable lubrication pockets. So in addition to a harder wear surface, the hard chrome increases longevity of both the new counterface and the seal itself, because the lubrication oil is held in place longer, keeping the seal cooler, and reducing friction. The hard chrome surface also minimizes galling and seizing. The Durasleeve is precision ground so there is also no helical lead angle, which would normally cause loss of lubrication and seal wear.
Superior Corrosion Resistance
The Durasleeve is made from ANSI 304 Stainless Steel, a chromium nickel alloy, and therefore has excellent resistance to a wide range of atmospheric environments and corrosive media. ANSI 304 Stainless is used in food handling and processing, appliances, fasteners, tanks, valves, heat exchangers, filtration, marine, piping and much more.
Adding a hard chrome surface, also known as industrial chrome, creates a seal surface that is even more resistant to oxidization, acids, salts, and many other corrosive environments.
If needed, the flange, which is used for installation, can be removed after install. To do this, cut from the outside flange diameter into the radius and up to the groove, in only one place. Install the sleeve, then use a pair of needle-nose pliers to twist off the sleeve into a coil. Be sure that when you are installing the seal that no sharp edges damage it.