{"id":13300,"date":"2026-03-26T09:36:06","date_gmt":"2026-03-26T01:36:06","guid":{"rendered":"https:\/\/www.zmsbearing.com\/?page_id=13300"},"modified":"2026-05-21T11:55:07","modified_gmt":"2026-05-21T03:55:07","slug":"cuscinetti-a-rulli-cilindrici-a-doppia-fila","status":"publish","type":"page","link":"https:\/\/www.zmsbearing.com\/it\/roller-bearings\/cylindrical-roller-bearings\/double-row-cylindrical-roller-bearings\/","title":{"rendered":"Cuscinetti a rulli cilindrici a doppia fila"},"content":{"rendered":"\n
\n
\n
\n
\n
\"\"<\/figure><\/div>\n<\/div><\/div>\n\n\n\n
\n
\"\"<\/figure><\/div>\n<\/div><\/div>\n\n\n\n
\n
\"\"<\/figure><\/div>\n<\/div><\/div>\n<\/div><\/div>
<\/div><\/div>\n<\/div>\n\n\n\n
\n

Home<\/a> \/ Roller Bearings<\/a> \/ Cylindrical Roller Bearings<\/a> \/ Double Row Cylindrical Roller Bearings<\/p><\/div>\n\n\n\n

Double Row Cylindrical Roller Bearings<\/h1><\/div>\n\n\n\n

Double row cylindrical roller bearings handle heavier loads with double row cylindrical rollers than single-row designs while maintaining compact dimensions and excellent running accuracy.<\/p><\/div>\n\n\n\n

ZMS is a professional supplier of double row cylindrical roller bearings in China. We can fast quote within 12 hours with detail stocking or delivery information. Our bearings are character with high precision P5 and P4 for machine tools and so on high accuracy applications. Brass cage are standard option. While full-complement (no cage) for maximum load in low-speed applications.<\/p><\/div>\n\n\n\n

We can supply series following:
\u00b7  NN Series<\/strong>: Ribs on the inner ring (separable outer ring).
\u00b7  NNU Series<\/strong>: Ribs on the outer ring (separable inner ring).
\u00b7  Available with cylindrical bore or tapered bore (K suffix) for easy adapter sleeve mounting.<\/p><\/div>\n<\/div>\n<\/div><\/div>\n\n\n\n

\n
\n
<\/div>\n\n\n\n
\n

Item<\/h4><\/div><\/div><\/div>\n<\/div>\n\n\n\n
\n

Desc<\/h4><\/div><\/div><\/div>\n<\/div>\n<\/div>\n\n\n\n
\n
\n

01<\/p><\/div><\/div><\/div>\n<\/div>\n\n\n\n

\n

Why us?<\/strong><\/strong><\/strong><\/strong><\/h4><\/div><\/div><\/div>\n<\/div>\n\n\n\n
\n

Manufactured from premium chrome steel or special alloys with optimized heat treatment.
Precision-ground raceways and rollers for smooth, quiet operation.
Alternative with major brands (SKF, NSK, NTN, Timken, FAG, etc.).
Competitive pricing with much considerable times and full technical support.
Custom made can be acceptable
Wooden case packing or special packing as request<\/p><\/div><\/div><\/div>\n<\/div>\n<\/div>\n\n\n\n

\n
\n

02<\/p><\/div><\/div><\/div>\n<\/div>\n\n\n\n

\n

Specifications<\/strong><\/strong><\/strong><\/h4><\/div><\/div><\/div>\n<\/div>\n\n\n\n
\n

Bore Diameter (d)<\/strong>: 25 mm to 750 mm (or larger on request)
Outside Diameter (D)<\/strong>: Up to 1000 mm+
Width (B)<\/strong>: Varies by series
Load Ratings<\/strong>: Significantly higher radial dynamic and static loads compared to single-row equivalents
Clearance<\/strong>: CN (normal), C3, C4, or customized
Speed Ratings<\/strong>: High limiting speeds depending on lubrication and precision class
Operating Temperature<\/strong>: Up to +150\u00b0C (standard) or higher with special materials<\/p><\/div><\/div><\/div>\n<\/div>\n<\/div>\n\n\n\n

\n
\n

03<\/p><\/div><\/div><\/div>\n<\/div>\n\n\n\n

\n

Applications<\/strong><\/strong><\/strong><\/strong><\/h4><\/div><\/div><\/div>\n<\/div>\n\n\n\n
\n

Machine tool spindles (lathes, milling machines, grinding)
Gearboxes and speed reducers
Rolling mills and heavy machinery
Printing equipment
Pinion stands and large electric motors
Construction and mining equipment<\/p><\/div><\/div><\/div>\n<\/div>\n<\/div>\n<\/div><\/div>\n\n\n\n

NN vs. NNU Design Structures<\/strong><\/h2>\n\n\n\n

When selecting double row cylindrical roller bearings, understanding the rib (flange) configuration is crucial for your shaft design.<\/p>\n\n\n\n