DODGEP2B-SXRH-107Two-Bolt Pillow Block Ball Bearing Unit, 1-7/16 in Bore, Eccentric Collar Locking, Triple-Lip Contact Seals with Flingers, Cast Iron

Product Description

What this part is

A two-bolt pillow block ball bearing unit for a 1-7/16 in shaft, from Dodge’s SXR mounted ball bearing line. Cast iron housing, eccentric collar locking, DualGuard triple-lip contact seals with flingers, and relubricatable through a grease fitting.

Correcting the source data — two errors

The previous listing called this a flange mount bearing with a 3 in bore. Both are wrong.

P2B means Pillow Block, 2-Bolt. It is Dodge’s most recognisable prefix and it is unambiguous — this unit bolts to a horizontal base, not to a vertical face. That is the error class that produces automatic returns, because a buyer who needs a flange gets something that cannot mount where they intended.

The bore is 1-7/16 in, which is what the trailing 107 encodes. The 3 in figure in the old description appears to have been carried across from a different Dodge listing.

Decoding the designation

P2B — Pillow Block, 2-BoltSXR — Dodge’s current-generation eccentric-collar mounted ball bearing lineH — a variant within the SXR family. Dodge publishes no explicit gloss for the H, so it is not decoded here rather than guessed at. Within the family, SXR is the standard and SXRB is the low-backing-height version, so H reads as the taller or heavier variant, but that is an inference and is labelled as one107 — bore, in sixteenths above the whole inch: 1-7/16 in (36.525 mm)

A catalogue-number caution worth reading

The number 126411 travels with this listing. Dodge’s published catalogue number 126416 corresponds to P2B-SXRH-107-E, where the E denotes the expansion or float version, and 126411 could not be tied to a published P2B-SXRH-107 record.

That matters because expansion and non-expansion units are not interchangeable. A non-expansion bearing locates the shaft axially; an expansion unit lets the shaft grow through it. On a shaft with two or more bearings, exactly one should locate and the rest should float — get that wrong and thermal growth loads the bearings against each other until one fails. If your position is specifically the locating or the floating one, ask and we will read the markings off the housing before shipping.

Why an eccentric collar rather than setscrews

The eccentric collar locks by camming rather than by biting into the shaft. The collar’s eccentric counterbore engages a matching eccentric register on the insert’s extended inner ring; you slip it on, give it a quarter turn in the direction of shaft rotation, and the eccentrics grip. A setscrew in the collar then holds that position.

The advantages are real: no dimples punched into the shaft, so the shaft stays reusable across repeated bearing changes; a concentric grip that does not shift the inner ring off-centre the way an unevenly tightened setscrew pair can; and dependable holding under load reversal. The one catch is that it is direction-dependent — turned against shaft rotation, normal running will progressively loosen it. That is the most common eccentric-collar failure and it is entirely avoidable.

Published data

Bore: 1-7/16 in / 36.525 mmHousing style: two-bolt pillow blockHousing material: cast ironLocking: eccentric collar, quarter turnSeals: DualGuard triple-lip contact seals with flingersBase to bore centre height: 2.125 inBolt centres: 5.7 in nominal (5.063 in minimum to 6.313 in maximum)Mounting holes: 2Relubricatable: yes

Dynamic and static load ratings and weight are not published for the -107 size of this reference and are deliberately omitted rather than borrowed from an adjacent bore size. The dimensions above come from distributor records rather than a Dodge-hosted table.

Why triple-lip seals matter here

The DualGuard arrangement is a genuine specification rather than marketing. Three contact lips in series, backed by a rotating flinger that throws liquid and debris off before it reaches the lips, is aimed squarely at washdown and dusty environments — food processing, aggregate handling, agriculture, outdoor conveyors. A single-lip seal in that duty admits water, the grease emulsifies, and the bearing fails from contamination long before it fails from fatigue. If your application is clean and dry the triple lip is more seal than you need; if it is wet or dirty it is the reason to choose this unit over a cheaper one.

Interchange guidance

Cross-references: P2B-SXRH-107, P2BSXRH107, P2B SXRH 107, P2B-SXRH-107-E, 126411, 126416. Related Dodge variants: P2B-SXR-107 (standard), P2B-SXRB-107 (low backing height), P2B-SXRH-107-E (expansion). Four-bolt flange equivalents in the SXR line carry F4B prefixes. Obsolescence trail: Dodge passed from Rockwell to Baldor to ABB and is now Dodge Industrial under RBC Bearings, so all four names appear against these part numbers.

Central Surplus also stocks SealMaster, Link-Belt and Timken Fafnir mounted units in nearby bore sizes. Three of these Dodge units are on hand, so a two- or three-bearing shaft can be fitted from one batch.