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Product Description
The 352956 (GOST current designation) is an Ultra Heavy-Duty Double Row Tapered Roller Bearing with boundary dimensions of 280×380×134mm, featuring a high static-to-dynamic load ratio (Cor/Cr = 1.50) — well above the standard 3522xx series ratio of 1.24 — reflecting exceptional shock load resistance and suitability for extreme static overload conditions.
Cross-referenced as 2097956 (original GOST) and 352956X2, this bearing belongs to the 3529xx ultra heavy-duty series. Confirmed independently by ushgt.com double-row tapered roller bearing database as 352956X2 / 2097956, 280×380×134mm, 41.3kg.
A notable structural characteristic of the 352956 is its 134mm width — a significant reduction from the 160mm width shared by the four larger siblings (352960 / 352964 / 352968 / 352972). This design choice reflects an engineering optimization for 280mm shaft applications: delivering ultra-heavy-duty load capacity within a more compact axial installation envelope, making the 352956 particularly suitable for space-constrained heavy machinery where a 280mm bore is required but axial space is limited.
At 41.3 kg, the 352956 is approximately 35% lighter than the 352960 (63kg), yet maintains a Cor/Cr ratio of 1.50 — still significantly above the standard 3522xx series — confirming its ultra heavy-duty engineering pedigree.
Parameter | Value |
Part Number (Current) | 352956 |
Cross Reference | 2097956 |
Also Known As | 352956X2 |
Bearing Type | Double Row Tapered Roller Bearing (Ultra Heavy-Duty Series) |
Bore Diameter (d) | 280 mm |
Outer Diameter (D) | 380 mm |
Width (B) | 134 mm |
Dynamic Load Rating (Cr) | 1,900 kN |
Static Load Rating (Cor) | 2,850 kN |
Cor/Cr Ratio | 1.50 |
Limiting Speed (Grease) | 250 r/min |
Limiting Speed (Oil) | 340 r/min |
Weight | 41.3 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 ultra-heavy radial loads AND bidirectional axial loads in both directions, ideal for the most demanding shaft applications with combined loading
✅ Cr=1,900kN / Cor=2,850kN — Ultra-heavy-duty load capacity with Cor/Cr=1.50, providing outstanding resistance to extreme shock loads and overloads in rolling mill and mining startup conditions
✅ Cor/Cr = 1.50 — Well Above Standard — Significantly exceeding the standard 3522xx series ratio of 1.24, reflecting superior static overload resistance for severe intermittent shock loading applications
✅ Compact 134mm Width — Key structural advantage: more compact axial envelope than the 160mm-width siblings, enabling installation in space-constrained heavy machinery for 280mm shaft applications
✅ 280mm Bore / 380mm OD — Purpose-built for 280mm shaft installations requiring ultra-heavy-duty load capacity in the most demanding industrial machinery
✅ 41.3kg Mass — ~35% lighter than the 352960 (63kg) while maintaining ultra heavy-duty Cor/Cr=1.50, reflecting optimized structural efficiency
✅ 250/340 rpm Limiting Speed — Optimized for ultra-heavy slow-speed applications typical of rolling mills, large crushers, and heavy industrial drives
✅ Steel Cage Construction — Heavy-duty steel cage provides superior roller guidance and retention under extreme centrifugal and impact forces
✅ HRC 60–64 Hardness — Premium GCr15/52100 chrome steel with precisely controlled hardness for exceptional wear resistance and fatigue life under extreme loading
✅ Severe-Duty Engineered — Designed specifically for ultra-high loads, severe misalignment, heavily 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 to suit diverse application requirements
✅ 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 for seamless maintenance replacement
Based on the bearing's 280mm bore, 1,900kN dynamic load rating, Cor/Cr=1.50, compact 134mm width, and ultra heavy-duty GOST-series construction:
Industry | Application |
Metallurgy / Steel Mills | Rolling mill roll neck bearings, blooming mill main shafts, roughing mill stands |
Mining Equipment | Jaw crusher main shafts, gyratory 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, heavy press section roll neck bearings |
Power Generation | Turbine auxiliary equipment, heavy generator shaft supports |
Cement Industry | Rotary kiln main support rollers, raw mill & cement mill main drives |
Heavy Construction | Crane main hoisting gear shafts, heavy 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 | 352956 |
GOST Original | 2097956 |
Also Known As | 352956X2 |
Material Equivalent | 52100 (AISI) / 100Cr16 (DIN) / SUJ2 (JIS) / GCr15 (GB) |
Interchangeable With | SKF, FAG, Timken, NSK, NTN same-dimension equivalents |
The 352956 marks a key structural transition within the 3529xx ultra heavy-duty series — shifting from 160mm width to 134mm width at the 280mm bore:
Model | d × D × B | Cr | Cor | Cor/Cr | Speed Grease/Oil | Weight | Width Note |
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 |
352236 | 180×320×190mm | 410 kN | 510 kN | 1.24 | —/— rpm | 62.7 kg | Standard |
Given the 41.3kg unit weight of the 352956, NEXANS Bearing provides specialized heavy-bearing export services:
Reinforced Wooden Crate Packaging — Custom heavy-duty export crating for 41.3kg 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, with particular expertise in ultra heavy-duty large-bore bearings.
Factory-Direct Pricing — No middlemen, competitive wholesale rates for ultra heavy-duty bearings
Ready Stock — Available inventory for 352956 / 2097956 with fast delivery
Flexible MOQ — Suitable for both single-unit maintenance replacements and bulk OEM orders
OEM / Private Label — Custom branding & packaging available
Full Export Documentation — CO, quality certificates, reinforced export packaging for 41.3kg bearings
Technical Support — Expert application engineering support for clearance (C0~C5), precision grade (P0~P2), and lubrication recommendations for your specific ultra heavy-duty operating conditions
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.
