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Product Description
The 352952 (GOST current designation) is an Ultra Heavy-Duty Double Row Tapered Roller Bearing with boundary dimensions of 260×360×134mm, featuring a high static-to-dynamic load ratio (Cor/Cr = 1.42) — above the standard 3522xx series ratio of 1.24 — reflecting excellent shock load resistance and suitability for extreme static overload conditions.
Cross-referenced as 2097952 (original GOST) and 352952X2, this bearing is independently confirmed by tradebearings.com with Cr=1,060kN, limiting speeds of 670rpm (grease) / 900rpm (oil), and by alibaba.com as a Double Row Taper Roller Bearing with 260mm bore, 360mm OD, precision grades P0/P6/P5/P4.
A key engineering characteristic of the 352952 is its dramatically higher limiting speed compared to larger 3529xx siblings: at 670 rpm (grease) / 900 rpm (oil), it operates at approximately 3× the speed of the 352960 (230/320rpm) and 3.3× the speed of the 352972 (200/280rpm). This reflects the fundamental bearing physics of smaller bore diameters enabling higher rotational speeds, making the 352952 uniquely suited for 260mm shaft applications that combine ultra-heavy loads with moderate-to-higher speed operation.
At 36.8 kg with a 134mm width, the 352952 continues the compact 134mm-width design strategy established by the 352956, delivering ultra-heavy-duty load capacity within a space-efficient installation envelope for 260mm shaft applications.
Parameter | Value |
Part Number (Current) | 352952 |
Cross Reference | 2097952 |
Also Known As | 352952X2 |
Bearing Type | Double Row Tapered Roller Bearing (Ultra Heavy-Duty Series) |
Bore Diameter (d) | 260 mm |
Outer Diameter (D) | 360 mm |
Width (B) | 134 mm |
Dynamic Load Rating (Cr) | 1,060 kN |
Static Load Rating (Cor) | 1,500 kN |
Cor/Cr Ratio | 1.42 |
Limiting Speed (Grease) | 670 r/min |
Limiting Speed (Oil) | 900 r/min |
Weight | 36.8 kg |
Material | GCr15 / 52100 / 100Cr16 / SUJ2 Chrome Steel |
Hardness | HRC 60–64 |
Seal Type | Open / Shielded / Sealed (available) |
Clearance | C0, C2, C3, C4, C5 |
Precision Grade | ABEC 1/3/5/7/9；DIN620 P0/P6/P5/P4/P2 |
Brand | NKS / NEXANS / OEM available |
✅ Double Row Tapered Roller Design — Simultaneously handles heavy radial loads AND bidirectional axial loads in both directions, ideal for demanding shaft applications with combined loading
✅ Cr=1,060kN / Cor=1,500kN — Heavy-duty load capacity with Cor/Cr=1.42, providing outstanding resistance to shock loads and overloads in rolling mill and mining startup conditions
✅ Cor/Cr = 1.42 — Above Standard — Exceeding the standard 3522xx series ratio of 1.24, reflecting superior static overload resistance for severe intermittent shock loading applications
✅ 670/900 rpm Limiting Speed — Significantly higher speed capability than larger 3529xx siblings (~3× faster), enabling use in moderate-to-higher speed heavy industrial applications for 260mm shafts
✅ Compact 134mm Width — Space-efficient axial envelope consistent with 352956, enabling installation in space-constrained heavy machinery for 260mm shaft applications
✅ 260mm Bore / 360mm OD — Purpose-built for 260mm shaft installations requiring heavy-duty load capacity in demanding industrial machinery
✅ 36.8kg Mass — Compact and manageable weight for a 260mm bore ultra heavy-duty bearing, facilitating easier handling and installation
✅ Steel Cage Construction — Heavy-duty steel cage provides superior roller guidance and retention under centrifugal and impact forces
✅ HRC 60–64 Hardness — Premium GCr15/52100 chrome steel with precisely controlled hardness for exceptional wear resistance and fatigue life
✅ Severe-Duty Engineered — Designed for ultra-high loads, severe misalignment, contaminated environments, extreme shocks, and continuous vibrations per GOST ultra heavy-duty standards
✅ Multi-Clearance & Precision Options — C0~C5 clearance and P0~P2 precision grades available
✅ Open / Shielded / Sealed Variants — Flexible sealing configurations for clean, dusty, or wet operating environments
✅ Full Interchangeability — Compatible with SKF, FAG, Timken, NSK, NTN same-dimension equivalents
Based on the bearing's 260mm bore, 1,060kN dynamic load rating, 670/900rpm limiting speed, and compact 134mm width:
Industry | Application |
Metallurgy / Steel Mills | Rolling mill roll neck bearings, intermediate mill stands, section mill main shafts |
Mining Equipment | Jaw crusher main shafts, cone crusher eccentric shafts, ball mill trunnions |
Heavy Industrial Gearboxes | Industrial speed reducer output shafts, multi-stage heavy gearbox main shafts |
Paper & Pulp Machinery | Large paper machine roll shafts, press section roll neck bearings |
Power Generation | Turbine auxiliary equipment, generator shaft supports |
Cement Industry | Rotary kiln support rollers, raw mill & cement mill main drives |
Heavy Construction | Crane hoisting gear shafts, excavator swing ring drives |
Offshore & Marine | Ship propulsion shaft supports, offshore drilling equipment |
Forging & Pressing | Hydraulic press main shafts, forging hammer guide bearings |
Designation System | Part Number |
GOST Current | 352952 |
GOST Original | 2097952 |
Also Known As | 352952X2 |
Material Equivalent | 52100 (AISI) / 100Cr16 (DIN) / SUJ2 (JIS) / GCr15 (GB) |
Interchangeable With | SKF, FAG, Timken, NSK, NTN same-dimension equivalents |
Model | d × D × B | Cr | Cor | Cor/Cr | Speed Grease/Oil | Weight | Width |
352952 | 260×360×134mm | 1,060 kN | 1,500 kN | 1.42 | 670/900 rpm | 36.8 kg | 134mm |
352956 | 280×380×134mm | 1,900 kN | 2,850 kN | 1.50 | 250/340 rpm | 41.3 kg | 134mm |
352960 | 300×420×160mm | 2,350 kN | 3,650 kN | 1.55 | 230/320 rpm | 63 kg | 160mm |
352964 | 320×440×160mm | 2,500 kN | 3,900 kN | 1.56 | 220/310 rpm | 67 kg | 160mm |
352968 | 340×460×160mm | 2,650 kN | 4,150 kN | 1.57 | 210/300 rpm | 71 kg | 160mm |
352972 | 360×480×160mm | 2,880 kN | 4,750 kN | 1.65 | 200/280 rpm | ~120 kg | 160mm |
Key Series Insights:
The 352952 achieves the highest limiting speed in the entire 3529xx series at 670/900 rpm — approximately 3.2× faster than the 352972 (200/280 rpm), reflecting the fundamental advantage of smaller bore diameters in rotational speed capability
As bore diameter increases across the series, the Cor/Cr ratio progressively rises from 1.42 to 1.65, with load capacity growing substantially at each step — reflecting the ultra heavy-duty engineering escalation of the 3529xx family
The 134mm-width segment (352952 / 352956) is optimized for moderate-to-higher speed heavy-duty applications; the 160mm-width segment (352960 – 352972) is purpose-engineered for ultra-low-speed, ultra-heavy-load extreme industrial duty
The 352952 is the most speed-capable and most compact member of the 3529xx series, delivering the optimal solution for 260mm shaft applications that demand both ultra-heavy load capacity and higher rotational speed performance
Given the 36.8kg unit weight of the 352952, NEXANS Bearing provides specialized heavy-bearing export services:
Reinforced Wooden Crate Packaging — Custom heavy-duty export crating for 36.8kg bearings, ensuring safe transit for international shipments
Heavy Freight Coordination — Experienced in LCL/FCL ocean freight for large industrial bearings to global destinations
Full Export Documentation — Certificate of Origin (CO), material certificates, quality inspection reports, packing lists
Installation Guidance — Technical documentation for mounting, alignment, and lubrication of large-bore tapered roller bearings
OEM / Private Label — Custom branding available for distributors and OEM customers
Since 1997, Liaocheng Nexans Bearing Co., Ltd has been a trusted factory-direct manufacturer and global supplier of GOST-standard heavy industrial bearings.
Factory-Direct Pricing — No middlemen, competitive wholesale rates
Ready Stock — Available inventory for 352952 / 2097952 with fast delivery
Flexible MOQ — Suitable for single-unit replacements and bulk OEM orders
OEM / Private Label — Custom branding & packaging available
Full Export Documentation — CO, quality certificates, reinforced export packaging
Technical Support — Expert application engineering support for clearance, precision grade, and lubrication recommendations
Email: export@nksbearing.com WhatsApp: +86-15562839480 Website: www.nksbearing.com
NEXANS Bearing — Your trusted factory-direct partner for GOST-standard ultra heavy-duty industrial bearings since 1997.
