NSKDouble-Row Spherical Roller Bearing, 80 x 140 x 33 mm, 1:12 Tapered Bore, Machined Brass Cage, C3 Clearance

Product Description

What this part is

NSK 22216 MKE4C3 double-row spherical roller bearing. Bore: 80 mm, 1:12 tapered. Outside Diameter: 140 mm. Overall Width: 33 mm. Number Of Rows: 2. Rolling Elements: barrel-shaped spherical rollers, two rows. Cage Type: Machined, one per roller row. Cage Material: Brass. Closure Type: Open. Internal Clearance: C3, greater than the normal group. Precision Class: ABEC 1 / P0. Series: 222. Design Units: Metric. Country of Origin: Japan. Unit Quantity: 1 Pc.

Both rows of barrel rollers run against a single spherical raceway ground into the outer ring, so the inner ring, rollers and cage swivel bodily inside the outer ring. Maximum Permissible Misalignment: 2°. That gives high radial and shock capacity together with tolerance of shaft deflection and housing seats bored out of line.

Decoding the designation

222: ISO dimension series for spherical roller bearings. 16: bore reference number, 16 × 5 = 80 mm bore. M: machined brass cage. K: 1:12 tapered bore. E4: NSK internal design code for this series; the current standard steel-cage designation on the same envelope is EAE4. C3: radial internal clearance greater than the normal group. S11: NSK heat stabilisation, rings dimensionally stabilised for elevated operating temperature, carried on the carton marking for this bearing. Searchable variants: 22216MKE4C3, 22216 MKE4 C3, 22216-MK-E4-C3, 22216MKE4C3S11, 22216E4C3S11, 22216MK, 22216K.

Published ratings and mounting data

Dynamic Load Rating (Cr): 264,000 N (264 kN, 59,300 lbf). Static Load Rating (C0r): 275,000 N (275 kN, 61,800 lbf). Limiting Speed: 4,500 rpm. Maximum Operating Temperature: 200 °C. Minimum Operating Temperature: -30 °C. Item Weight: 2.1 kg (4.63 lb). Matching adapter sleeve: NSK H 316, seating a plain 75 mm shaft. Lubricant: grease or oil.

What these specs mean in practice

Three features on this bearing point at the same duty: hot, shock-loaded and heavily fitted. The machined brass cage is stiffer than pressed steel and more tolerant of impact loading and sustained temperature, which is why M-cage spherical rollers run in crushers, screens, mill drives and hot fans. The S11 stabilisation holds the ring dimensions, and their fits, above the standard temperature limit. C3 clearance leaves headroom for the inner ring to expand under both the heavy interference fit and a running temperature above the housing.

The tapered bore sets the interference fit and the residual internal clearance together as the ring is driven up its seat, so the clearance can be re-set at every rebuild.

Quantity and configuration

Unit Quantity: 1 Pc. One complete double-row spherical roller bearing: outer ring, inner ring, two rows of barrel rollers and the machined brass cages, assembled. Open on both faces. Locking Method: 1:12 taper drive-up on a matching tapered shaft seat, or an NSK H 316 adapter sleeve with lock nut and lock washer over a plain 75 mm shaft.

Interchange guidance

Dimensionally interchangeable tapered-bore 22216 K spherical roller bearings at the same clearance class: NSK 22216EAKE4C3, SKF 22216 EK/C3 and 22216 CCK/C3W33, FAG 22216-E1-XL-K-C3, NTN 22216BKD1C3, Koyo 22216RHRKW33C3, Timken and Torrington 22216KEJW33C3, Steyr 22216-C-K-MB-C3-W33. W33 executions add an annular lubrication groove and three outer-ring feed holes on the same boundary. Straight-bore 22216 EAE4C3, 22216 E/C3 and 22216 CC/C3W33 share the 80 x 140 x 33 envelope with a cylindrical bore and seat on a machined cylindrical shaft seat.