DodgeP2B-K-208RETwo-Bolt Pillow Block, 2-1/2 in Bore, Double-Row Tapered Roller Insert, Expansion Type, Type K

Product Description

What this part is

A Dodge Type K two-bolt pillow block bearing unit for a 2-1/2 inch shaft, with a double-interlock double-row tapered roller bearing insert, in the expansion configuration. Type K is Dodge’s heavy-duty roller pillow block: the double-row tapered roller design carries heavy radial load and combined radial and thrust load in a single mounted unit, which is why it turns up on conveyor head and tail shafts, bucket elevators, crushers, kilns and heavy fans.

Designation breakdown

P2B: Dodge pillow block, two-bolt base mounting.

K: Type K, double-row tapered roller bearing insert, double interlock.

208: 207 series housing, 2-1/2 inch bore.

RE: expansion type, with the bearing outer race free to slide axially in the housing.

Dodge part code 023202. Also written P2BK208RE and P2B K 208RE.

What these specs mean in practice

The expansion designation is the spec that decides this sale. On a long shaft with a bearing at each end, only one of them holds the shaft axially. The other lets the shaft grow and shrink with temperature, so that the two housings do not fight each other and load the bearings axially. An RE expansion unit is that floating end: its outer race slides in the housing bore. A non-expansion unit of the same size is the fixed end.

The Type K insert is the other reason to choose this over a ball pillow block. Double-row tapered rollers seat on opposed contact angles, so they carry heavy radial load plus thrust in both directions and are far stiffer than a ball insert. A Type K is not self-aligning, unlike a spherical roller or a wide-inner-ring ball unit, so the shaft and the two housing seats have to be genuinely in line.

Published ratings and mounting data

Housing style: two-bolt pillow block, cast iron.

Bearing type: double-row tapered roller, double interlock (Dodge Type K).

Shaft size: 2-1/2 in.

Series: 207 housing series.

Expansion: expansion (float) type.

Bolt centre to centre: 9-1/4 to 10-1/4 in (slotted).

Base to bore centreline: 3-1/4 in.

Overall length: 12 in.

Overall height: 7.03 in.

Dodge part code: 023202.

UPC: 782475699155.

Quantity and configuration

Sold as 1 piece — one complete pillow block unit: housing, bearing insert, seals and end caps as supplied by Dodge. Not a housing-only split block. No mounting bolts, no shims and no shaft supplied.

Mounting data

Bolt centre adjustment from the slotted holes: 9-1/4 to 10-1/4 in.

Interchange guidance

Genuine equivalents are other 2-1/2 inch bore two-bolt pillow blocks with a double-row tapered roller expansion insert and matching bolt centres and centre height, Link-Belt and Rexnord heavy roller pillow blocks in the same series being the usual alternatives. A P2B-S2-208RE has an S-2000 double-row spherical roller insert, a P2B-IP-208RE an Imperial spherical roller insert, and a P2B-DI-208RE a different design again. All share the bore and none is a drop-in for a Type K. A P2B-K-208R without the E is the non-expansion version, the opposite half of the pair.