 |
Product Description
The 352930X2D is a double row tapered roller bearing built to the Chinese GB standard, also known by its legacy designation 2057930. With a 150 mm bore, 210 mm outside diameter, and 80 mm total width, it carries heavy combined radial and bi-directional axial loads — the configuration used in rolling-mill work rolls, industrial gearboxes, hoisting equipment, and mining machinery where stiffness and shock resistance matter more than maximum speed.
Entity information
Attribute | Value |
Brand / Manufacturer | Nexans Bearing (Liaocheng Nexans Bearing Co., Ltd.) |
Model | 352930X2D |
Legacy / Old number | 2057930 |
Bearing type | Double row tapered roller bearing |
Quality system | ISO 9001 (manufacturer) |
HS Code | 8482200000 |
Typical applications | Rolling mills, gearboxes, mining equipment, cranes/hoists, oil-field & hydraulic machinery, tunnel boring machines |
Parameter | Value |
Bore diameter (d) | 150 mm |
Outside diameter (D) | 210 mm |
Total width (T) | 80 mm |
Inner ring width — one row (B) | 36 mm |
Outer ring width (C) | 62 mm |
Chamfer r (min) | 2.5 mm |
Chamfer r1 (min) | 0.7 mm |
Dynamic load rating (Cr) | 350 kN (some supplier catalogs list 385 kN — verify against your production batch) |
Static load rating (Cor) | 795 kN |
Limiting speed — grease | 1200 r/min |
Limiting speed — oil | 1500 r/min |
Calculation factors | e 0.27 |
Mass (weight) | ≈ 9.12 kg |
Rings & rollers material | Chrome steel GCr15 (AISI 52100 / 100Cr6 / SUJ2 equivalent) |
Cage | Pressed steel (standard) |
Internal clearance | C0 / C2 / C3 / C4 / C5 (C3 or C0 commonly supplied) |
Precision class | P0 (standard), P6, P5, P4 — corresponds to ABEC 1 / 3 / 5 / 7 / 9 |
Note on load ratings: The previous page listed Cr 41 000 N / Cor 51 000 N. This is off by roughly a factor of ten and has been corrected to the catalog standard 350 / 795 kN (cross-checked against ZWZ, HRB, LYJH and multiple distributor catalogs).
Designation | Value |
Nexans / GB new number | 352930X2D (also supplied as 352930X2) |
Domestic old number | 2057930 |
SKF / FAG / NSK / NTN equivalent | No direct 1:1 equivalent — this is a GB-standard double row tapered roller series. International brands use paired/double-unit designs (e.g., SKF TDO/TDI) under their own codes, not a matching GB number. |
Equivalent supply | Same GB size available from major Chinese bearing makers (ZWZ, HRB, LYJH). For replacement, quote GB 352930X2(D) or old 2057930 and confirm internal clearance with the OEM drawing. |
Rolling mill work rolls & back-up rolls — the primary use; high combined load and shock resistance.
Industrial gearboxes & reducers — bi-directional axial containment in a single compact unit.
Mining & tunnel-boring equipment — handles heavy, fluctuating, contaminated-service loads.
Cranes, hoists, oil-field & hydraulic machinery — where stiffness and reliability outweigh top speed.
Selection notes:
Double row tapered roller bearings are delivered with internal clearance pre-set; they mount and run without field adjustment. Confirm the required axial clearance with the host machine drawing.
Choose clearance (C3/C0) and precision (P0–P4) by speed, temperature, and rigidity needs.
For grease lubrication in normal duty, limiting speed is 1200 r/min; use oil for up to 1500 r/min.
Q1. What is the difference between 352930X2D and 352930X2?
Both share the identical 150×210×80 mm envelope and load ratings. X2D is a dimensional/suffix variant within the same GB 3529 double-row series; either can be quoted against old number 2057930. Confirm the exact suffix with your drawing.
Q2. Can this replace an SKF / FAG / NSK double row bearing?
Not by model number — there is no direct international cross-reference for the GB 3529 series. Replacement is done on a size-and-load basis: provide the 150×210×80 mm dimensions and required Cr/Cor, and our engineering will confirm fitment or propose an equivalent paired configuration.
Q3. What are the correct load ratings?
Dynamic Cr ≈ 350 kN (some catalogs 385 kN) and static Cor 795 kN. Earlier listings showing ~41/51 kN were incorrect and have been corrected.
Q4. What material and certifications apply?
Rings and rollers are chrome steel GCr15 (AISI 52100 / 100Cr6 equivalent) with a pressed-steel cage; production follows an ISO 9001 quality system. Specific certificates (material report, ISO copy) are available on request.
Q5. What is the minimum order quantity and lead time?
MOQ and lead time depend on stock and customization (clearance, precision, marking). Standard items are typically available from stock; OEM/ODM batches follow a quoted production schedule. Request a quote for current status.
Q6. Do you provide OEM/ODM and other brands?
Yes. Nexans Bearing is both a manufacturer and trader — we supply our own brand and can source/equivalence-match major Chinese lines (ZWZ, HRB, LYJH) and support custom OEM/ODM marking and packaging.
Browse the full range of double row & four row tapered roller bearings on Nexans Bearing.
For larger rolling-mill sizes, see the 3820/950 four row tapered roller bearing (20771/950).
Need the 352930X2D / 2057930 double row tapered roller bearing in 150×210×80 mm? Contact Nexans Bearing sales for stock, pricing, and delivery:
Email: export@nksbearing.com
WhatsApp / Tel: +86-15562839480
Or use the Request a Quote form.
