SKF 6307-2Z/C3HT deep groove ball bearing
- Brand
- SKF
- Category
- Bearings
- Subcategory
- Deep groove ball bearings
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Decoding SKF 6307-2Z/C3HT
- 63Series
- Deep groove ball bearings, 63 series. Series differ in outside diameter and width even when the bore is the same.
- 07Bore
- Bore 35 mm (07 × 5).
- 2Z/C3HTSuffix
- SKF suffix: identifies the variant, such as seals or shields, cage, internal clearance or other features.
6307 is the standard ISO basic designation, which sets the bearing type, series and bore.
Description
SKF 6307-2Z/C3HT measures 35 mm across the bore and 80 mm across the outside diameter; its width is 21 mm (35 x 80 x 21 mm).
SKF 6307-2Z/C3HT belongs to deep groove 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 6307-2Z/C3HT and any equivalents.
SKF Z/C HT series deep groove ball bearings handle radial and axial loads in equipment that runs hot. Their code brings together 2Z metal shielding, C3 or C4 internal clearance and HT thermal stabilization. Electric motors, industrial fans, ovens and continuous process lines are typical homes for this line. MR Industrial Accessories supplies these bearings and helps you match the right one to your application.
Reading the code tells you what you are holding. The basic number, for example 6206 or 6309, sets the dimensional series and size. The 2Z suffix means two metal shields, one per side, holding lubricant in and keeping coarse particles out. Then comes internal clearance, C3 or C4, both above normal, which you need when fits or temperature cause expansion. HT at the end marks a high temperature execution. So a 6209-2Z/C4HT is a 62 series bearing, double shielded, with C4 clearance for hot service.
These bearings show up wherever heat is part of the process: electric motors on oven fans, industrial dryers, boilers, baking equipment and heat treatment lines. You also find them in hot water pumps, compressors and conveyors running in high temperature environments. Food, chemical, ceramic and steel operations reach for this variant when standard bearings cannot take the thermal regime. Pairing 2Z shielding with increased clearance keeps operation stable under those conditions.
Selection starts with the real working temperature and the type of load. C3 or C4 clearance absorbs thermal expansion of shaft and housing so the bearing does not end up with negative clearance. 2Z shielding suits relatively clean surroundings; where fine dust or moisture is present, look at other closure options. Use the lubricant specified for high temperature, and take care with alignment and seat adjustment during assembly. Service conditions should always guide the clearance and thermal stabilization you pick.
On interchangeability, deep groove ball bearings with similar suffixes from other makers can be swapped in when main dimensions, internal clearance and heat treatment line up. The catch is that suffixes for HT stabilization and for C3 and C4 clearance are not standardized across manufacturers. When sourcing a replacement, check that the full code carries the same characteristics. MR Industrial Accessories can advise on interchangeability, though confirming against the equipment specifications is always wise.
To replace a bearing from this series, send the complete part number by WhatsApp or email. MR Industrial Accessories reviews it with you so the part you receive fits the application.
More SKF versions in the 6307 series
SKF lists these 6307 series versions in its catalogs, but they don't have a page on this site. Send us the part number of any of them and we'll find it and quote it.
- SKF 6307 N
Dimensions
35 x 80 x 21 mm (d x D x B): boundary dimensions for basic designation 6307, according to ISO 15.
- Bore
- 35mm
- Outside diameter (D)
- 80mm
- Width (B)
- 21mm
Same size, other brands
Other brands' pages with basic designation 6307: 35 x 80 x 21 mm (d x D x B) per ISO 15.
What they share are the ISO 15 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 6307-2Z/C3HT bearing: what are its dimensions?
- SKF 6307-2Z/C3HT measures 35 mm across the bore and 80 mm across the outside diameter; its width is 21 mm (35 x 80 x 21 mm). Those are the boundary dimensions standardized in ISO 15 for basic designation 6307.
- What does the HT suffix mean in these bearings?
- HT identifies an execution with special thermal stabilization for high temperatures. It lets the bearing hold its dimensions and clearance across a wider thermal range than a standard bearing. Respect the maximum temperature given by the manufacturer to avoid permanent deformation.
- When should I choose a C3 or C4 clearance?
- Choose C3 or C4 when service conditions create expansions that would cut into normal internal clearance. That happens with high temperatures, heavy interference fits or thermal differences between shaft and housing. The larger clearance keeps the bearing from running preloaded and supports service life.
- Can I replace an SKF bearing with another brand?
- Yes, provided main dimensions, internal clearance and heat treatment match. Suffixes for these characteristics differ between manufacturers, so confirm the replacement code carries the same specifications. Send us the original code and we will help you find the equivalence.