TIMKEN 30221 tapered roller bearing
- Brand
- TIMKEN
- Category
- Bearings
- Subcategory
- Tapered roller 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 TIMKEN: matching part numbers →TIMKEN and RKB: matching part numbers →
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Decoding TIMKEN 30221
- 302Series
- Tapered roller bearings, 302 series. Series differ in outside diameter and width even when the bore is the same.
- 21Bore
- Bore 105 mm (21 × 5).
30221 is the standard ISO basic designation, which sets the bearing type, series and bore.
Description
TIMKEN 30221 measures 105 mm across the bore and 190 mm across the outside diameter; its total width is 39 mm (105 x 190 x 39 mm).
TIMKEN 30221 belongs to tapered roller 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 30221 and any equivalents.
Timken tapered roller bearings are built to carry radial and axial loads together, with a high capacity for their size. They suit applications that call for precise motion and rigidity, including gearboxes, wheel axles, spindles and industrial machinery. MR Industrial Accessories supplies this line.
A Timken tapered roller bearing code follows a numeric sequence that describes the size and geometry of the assembly. Series such as 30203, 30204, 30205 and 30206 cover single-row bearings with a defined contact angle and standardized dimensions. Suffixes, where present, point to details of internal design, sealing or mounting. Reading a code correctly means checking the full designation Timken assigns to each reference.
These bearings appear across many industries: agricultural and road machinery manufacturing, food processing, cement and metallurgy. In the automotive sector they are found in wheel hubs and differentials, and they also serve railway applications. Their capacity for combined loads and their rigidity make them a fit for demanding environments with strict precision and durability requirements.
Selection depends on the radial and axial load, the rotation speed, the lubrication and the sealing method. Installation calls for careful alignment and correct axial adjustment, because these bearings are sensitive to poor mounting. Grease or oil lubrication is chosen according to the application, while the seal keeps contamination out and lubricant in. Following the manufacturer's instructions for mounting and commissioning is recommended.
On equivalences, a Timken tapered roller bearing can be replaced by another brand that follows the same standardized dimensions and tolerances. It is still worth checking the technical specifications and material quality, since performance is not identical across brands. A specialist can review the specific application to confirm compatibility.
To request a Timken tapered roller bearing, send the code or model by WhatsApp or email. MR Industrial Accessories will quote it and suggest a compatible alternative when needed, and can advise on selection and mounting.
Dimensions
105 x 190 x 39 mm (d x D x T): boundary dimensions for basic designation 30221, according to ISO 355.
- Bore
- 105.000 mm
- Outside diameter (D)
- 190mm
- Total width (T)
- 39mm
SKF and other brands, same size
Other brands' pages with basic designation 30221: 105 x 190 x 39 mm (d x D x T) per ISO 355.
What they share are the ISO 355 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
- TIMKEN 30221 bearing: what are its dimensions?
- TIMKEN 30221 measures 105 mm across the bore and 190 mm across the outside diameter; its total width is 39 mm (105 x 190 x 39 mm). Those are the boundary dimensions standardized in ISO 355 for basic designation 30221.
- What does the designation of a Timken tapered roller bearing mean?
- The numeric part indicates the size and geometry of the bearing. Suffixes can indicate characteristics such as the contact angle or the cage type. To interpret each code correctly, consult Timken's specific coding.
- How do I choose the right tapered roller bearing for my application?
- Consider the radial and axial load, the speed, the lubrication and the sealing. Verifying the shaft and housing dimensions is also key. A specialist can help you select the model that best suits your equipment.
- Are Timken bearings interchangeable with other brands?
- Yes, as long as the dimensions and tolerances match the standards. Performance can vary with the quality of the materials and the manufacturing process. Contact us to evaluate the best option for your application.