NTN6214ZZNRDeep Groove Ball Bearing – 70 mm Straight Bore, 125 mm OD, 24 mm Width, Two Metal Shields, Snap Ring Supplied, CN Clearance, 2 Pcs

Product Description

What this part is

NTN 6214ZZNR is a single-row deep groove ball bearing, 70 mm bore by 125 mm outside diameter by 24 mm width, with a pressed steel shield on each face and a retaining ring seated in a groove machined into the outer ring. It sits in the 62 dimension series, the medium-section deep groove family.

Decoding the designation

The 62 gives the dimension series and 14 is the bore code, 14 × 5 = 70 mm. In the NTN scheme ZZ means two pressed steel shields — a non-contact closure, distinct from the LLU contact-seal suffix. N denotes the snap ring groove in the outer ring; NR denotes that groove together with the snap ring itself. No clearance suffix follows, so radial internal clearance is CN.

What these specs mean in practice

Shields run with a small clearance to the inner ring rather than rubbing it, so they retain grease and exclude coarse debris while adding almost no drag. That keeps the speed capability high — NTN publishes 5,100 rpm on grease for this size — where a contact-seal version of the same bearing would run slower and warmer. Basic load ratings are 69 kN dynamic and 44 kN static.

Snap ring provision

The retaining ring locates the bearing axially against a plain housing bore, so the housing needs no shoulder or end cap on that side. Groove diameter D1 is 120.220 mm, the ring outside diameter D2 is 134.700 mm, ring thickness f is 2.820 mm and the groove is set 4.06 mm in from the face.

Quantity and configuration

Two bearings, each with two pressed steel shields, a pressed steel cage, CN clearance and its snap ring. Mass 1.090 kg each.

Fitting notes

Shaft shoulder diameter da 78 mm minimum, housing shoulder Da 117 mm maximum, ring corner radius r 1.5 mm with a permissible fillet ras of 1.5 mm. Precision is ISO Class 0. Operating temperature range −40 to 120 °C. Factory grease fill is already present behind both shields.

Interchange guidance

SKF 6214-2ZNR, FAG 6214-2Z-NR, NSK 6214ZZNR and Koyo 6214ZZNR are the same-specification equivalents in their own schemes. NTN 6214NR is the same size and snap ring provision with open faces, and NTN 6214ZZ carries the shields without the snap ring groove — both are related sizes rather than substitutes.