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An SKF radial shaft seal sits where a rotating shaft exits its housing, holding lubricant in and keeping dust and water out. SKF uses two styles of part number for these oil seals. One spells out the dimensions and then the design; the other is a plain number with no size information. Figure out which kind you have and the rest of the search falls into place.
View all SKF seals part numbers →SKF buyer's guide →Radial shaft seals, all brands →SKF V-ring seals →SKF speedi-Sleeve wear sleeves →
Take 6X16X5 HMSA10 RG: the first three figures are shaft diameter, housing bore and seal width, in millimeters. HMSA10 is the design, and the closing letters identify the lip variant. 8X22X7 HMSA10 V and 8X22X7 HMS5 RG have identical dimensions but are different seals: one changes the lip variant, the other changes the design.
12X22X7 CRW1 R comes from a different design family with its own ending. 1850 is a number-only part number, so its size cannot be read from it. If the old seal still carries a marking, write it down completely, spaces and letters included, before you start measuring.
You select a seal for the shaft position it seals. The key points are which way the lip faces, what sits on each side (oil, grease, water or dust) and the temperature and speed right there. Two identical gearboxes can use one seal at the input and another at the output. If the outside is dusty, see whether the old seal had a second lip; you lose that design detail when you pass along only the dimensions.
Inspect the shaft surface before installing the new seal. If the old lip wore a groove into it, a fresh seal will start leaking soon. Then the order grows: along with the seal you may need a wear sleeve, which SKF lists as a separate line.
The fastest way is the full part number and quantity. If you don't have it, measure the shaft and the housing with a caliper (not the distorted seal) to get the three dimensions, and send a photo of each face. Tell us the fluid being retained, whether dust or water is present, the approximate operating temperature and whether the shaft turns in one direction only. Naming the machine and the position, such as input, output or wheel, keeps us from mixing up two similar seals on the same equipment.
Not necessarily. The design and the closing letters belong to the part number too.
Look it up exactly as written or send it to us. The size cannot be worked out from it.
Use it only as a rough guide, since the lip and body deform in service. Measure the shaft and the housing instead.
The part numbers people look up most on Google. Each one opens a product page with dimensions and a WhatsApp quote button.
Can't find the exact model? Tell us the part number or model you need. We'll track it down and quote it, whether or not it appears in our catalog.
SKF radial shaft seals keep oil or grease inside rotating-shaft assemblies and block outside contaminants from reaching the bearings. They are common in gearboxes, pumps, electric motors and many other industrial machines. MR Industrial Accessories LLC supplies SKF seals and can help you match the right seal to your operating conditions.
SKF HMSA10 RG radial shaft seals are lip seals that keep lubricants in and contaminants out of rotating shaft applications. They are commonly found in gearboxes, electric motors, pumps, and gear reducers, among other equipment. MR Industrial Accessories supplies this line to customers across the United States and Latin America.
Example part numbers:6X16X5 HMSA10 RG6X16X7 HMSA10 RG8X18X5 HMSA10 RG8X18X7 HMSA10 RG8X22X7 HMSA10 RG
SKF HMSA10 V radial shaft seals are single-lip, spring-loaded seals for rotating shafts. They keep lubricant in and contaminants out of gearboxes, pumps, electric motors and reducers. The HMSA10 V code covers a seal with an elastomer lip, a steel spring and a metal case, suited to general industrial duty. MR Industrial Accessories supplies this line as part of its sealing range for customers in the United States and Latin America.
Example part numbers:8X22X7 HMSA10 V10X22X7 HMSA10 V10X26X7 HMSA10 V12X22X5 HMSA10 V12X22X6 HMSA10 V
The manufacturer part number is all we need: we'll quote it and share dimensions and equivalents via WhatsApp or email.
