SKF 51220 thrust ball bearing
- Brand
- SKF
- Category
- Bearings
- Subcategory
- Thrust ball bearings
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Other brands for this category
Ask us for alternatives. We check every equivalent against the part number and your application.
SKF and FAG: matching part numbers →SKF and NSK: matching part numbers →SKF and NTN: matching part numbers →SKF and RKB: matching part numbers →
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Decoding SKF 51220
- 512Series
- Thrust ball bearings, 512 series. Series differ in outside diameter and width even when the bore is the same.
- 20Bore
- Bore 100 mm (20 × 5).
51220 is the standard ISO basic designation, which sets the bearing type, series and bore.
Description
SKF 51220 measures 100 mm across the bore and 150 mm across the outside diameter; its height is 38 mm (100 x 150 x 38 mm).
SKF 51220 belongs to thrust ball bearing, part of our Bearings range. Tell us how many you need by WhatsApp or email and we'll get back to you promptly with a quote for 51220 and any equivalents.
SKF thrust ball bearings are built for axial loads acting in a single direction. Each bearing combines a shaft washer, a housing washer and a ball cage. They suit arrangements that call for axial rigidity and precision, including machine tool spindles, lathe faceplates and lifting mechanisms. MR Industrial Accessories supplies this line to customers in the United States and Latin America.
Reading the designation helps you narrow the selection. The 51100 series, for instance, covers single-direction bearings with a 10 mm shaft diameter; other series step up to higher-capacity designs. Suffixes tell you about the cage material, such as steel, brass or polyamide, and about variants that use spherical washers to compensate for misalignment. Matching the code to the application is the first step.
Typical users are in metalworking, food processing and petrochemical plants. You will find these bearings in milling machine spindles, rotary tables, vertical centrifugal pumps and lifting equipment, as well as in clutches and steering mechanisms. Where axial space is tight and rotational precision matters, their axial capacity makes them a practical choice.
Selection starts with the axial load, the rotational speed and the operating environment. Check that the washers are aligned, because these bearings do not compensate for angular misalignment. Lubrication, grease or oil, has a direct effect on service life. Mount with tools that will not damage the raceways, and follow the manufacturer's instructions for axial clearance.
SKF thrust ball bearings interchange with other brands that share the same standardized dimensions. Tolerances and cage type still deserve a check, since they can affect performance. Our team can suggest equivalents and help you confirm compatibility.
To request a quote, send the part number by WhatsApp or email. We reply promptly and can assist with product identification and application questions.
Dimensions
100 x 150 x 38 mm (d x D x H): boundary dimensions for basic designation 51220, according to ISO 104.
- Bore
- 100mm
- Outside diameter (D)
- 150mm
- Height (H)
- 38mm
Same size, other brands
Other brands' pages with basic designation 51220: 100 x 150 x 38 mm (d x D x H) per ISO 104.
What they share are the ISO 104 boundary dimensions, not the specs: seals or shields, internal clearance, cage and load rating may vary with brand and suffix. Every quote is by full part number.
Frequently asked questions
- SKF 51220 bearing: what are its dimensions?
- SKF 51220 measures 100 mm across the bore and 150 mm across the outside diameter; its height is 38 mm (100 x 150 x 38 mm). Those are the boundary dimensions standardized in ISO 104 for basic designation 51220.
- How does a thrust ball bearing differ from a radial bearing?
- A thrust ball bearing carries load along the axial direction, while a radial bearing carries load perpendicular to the shaft. They are not interchangeable where combined loads are significant.
- How should a thrust ball bearing be mounted?
- Place the shaft washer on the shaft and the housing washer in the housing, keeping both precisely aligned. Use suitable tools and follow the manufacturer's instructions.
- Which lubricant is right for these bearings?
- It depends on speed and temperature. Oil is common for high speeds; a good quality grease works for general applications. Contact us on WhatsApp for advice on your case.