Koyo22214PCKW33C3Spherical Roller Bearing – 70 x 125 x 31 mm, 1:12 Tapered Bore, W33 Lubrication Groove, C3 Clearance

Product Description

What this part is:

Koyo 22214PCKW33C3 double-row spherical roller bearing. Bore Diameter: 70 mm. Outside Diameter: 125 mm. Overall Width: 31 mm. Bore Type: Tapered 1:12. Number Of Rows: 2. Rolling Elements: Spherical Roller. Internal Clearance: C3. Closure Type: Open. Series: 22214. Design Units: Metric.

Decoding the designation:

22214 — the ISO spherical roller bearing designation. The 222 dimension series sets the 70 mm bore against a 125 mm outside diameter and a 31 mm width, in the narrow section of the spherical roller range.

K — a 1:12 tapered bore. The inner ring seats on a matching 1:12 taper, which is what allows the internal clearance to be set by how far the ring is driven up the taper.

W33 — an annular groove machined into the outside diameter of the outer ring, with three radial feed holes through to the rollers. It takes grease or oil from the housing lubrication port and distributes it right around the outer ring before feeding it inward.

C3 — radial internal clearance greater than normal, which leaves running clearance after the interference fit and the thermal growth of a hot shaft have both taken their share.

What these specs mean in practice:

Bore Type: Tapered 1:12. Internal Clearance: C3. Number Of Rows: 2. Two rows of barrel-shaped rollers run on a single spherical raceway in the outer ring, so the inner ring and roller set swivel inside the outer ring and the bearing accommodates shaft misalignment and shaft deflection without edge-loading the raceway. A double-row spherical roller bearing carries heavy radial load and takes thrust in both directions. Lubricant: grease or oil, through the W33 groove and its three radial feed holes.

Mounting data:

Bore Type: Tapered 1:12, for adapter-sleeve mounting on a plain cylindrical shaft. The adapter sleeve for this bearing is the H314: its tapered outside diameter is 70 mm, matching the bearing bore, and its shaft seat is 60 mm. The sleeve is locked with a KM14 locknut and an MB14 lockwasher. Driving the inner ring up the sleeve taper is what sets the mounted clearance, and the C3 starting clearance gives the room to do it.

Quantity and configuration:

Unit Quantity: 1 Pc. One complete double-row bearing, inner ring, both roller rows, cage and outer ring.

Interchange guidance:

22214 K W33 C3 is an ISO designation, so the same 70 x 125 x 31 mm tapered-bore execution with a W33 groove and C3 clearance is carried by SKF as 22214 EK/C3, by FAG as 22214-E1-K-C3, by NSK as 22214EAKE4C3, by NTN as 22214EAKD1C3, by Timken as 22214KEJW33C3 and by NACHI as 22214EXKC3. The Koyo designation is written 22214PCKW33C3, 22214-PC-K-W33-C3 and 22214 PC K W33 C3.