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Central Surplus Bearing Finder
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SealMaster SPB-111-2 two-bolt cast steel pillow block, 1-11/16 in bore, tapered roller insert RCI-111, double setscrew collars, non-expansion.
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| MFR / Brand | SealMaster |
|---|---|
| Model | SPB1112 |
| ID | 1-11/16 in |
| Type | Two-bolt base pillow block |
|---|---|
| Base Number | SPB-111-2 |
| Industry Terms | Two-bolt pillow block, mounted tapered roller bearing, RPB block, conveyor shaft block, plummer block |
| Common Misspellings | Seal Master SPB1112, Sealmaster SPB 1112, SPB-111 2 |
| Application Types | Belt and bucket conveyors, head and tail shafts, screw conveyors, aggregate and grain handling, fans and blowers |
| Bolt Center To Center | 3-3/8 in (85.7 mm) |
| Bore Shaft Size | 1-11/16 in |
| Housing Style | Two-bolt base pillow block, cast steel housing |
| Locking Method | Double setscrew locking collar (two collars, two setscrews each at 120°) |
| Replacement Insert | RCI-111 |
| Mpn Variants | SPB1112, SPB 111-2, SPB-111-2, SPB111-2 |
| Manufacturer Status | SealMaster is a Regal Rexnord brand; SPB series remains catalogued |
| Bearing Type | Mounted tapered roller bearing unit |
| Expansion Type | Non-expansion |
| Part Number | SPB1112 |
| Cross Reference 1 | SealMaster SPB-111-C2 – contact seal, not felt |
|---|---|
| Cross Reference 2 | SealMaster RPB-111-2 – cast iron housing, same RCI-111 |
SealMaster SPB-111-2 is a mounted tapered roller bearing unit from the SPB series. Brand: SealMaster (a Regal Rexnord brand). Part Number: SPB1112. Base Number: SPB-111-2. Series: SPB, Steel Pillow Block. Unit Quantity: 1 Pc. Design Units: Inch. Housing Material: Cast steel, split housing with cap. Bearing Material: Bearing steel insert with steel retainer.
Housing Style: Two-bolt base pillow block. The unit bolts to a horizontal pad below the shaft through two elongated base holes. Bolt Size: 1/2 in. Bolt Center To Center (J): 3-3/8 in (85.7 mm). Base To Shaft Centre Height (H): 4-3/8 in (111.1 mm). Base Slot Span (C): 5-9/16 in (141.3 mm) minimum to 6-7/16 in (163.5 mm) maximum. Source: SealMaster Mounted Tapered Roller Bearings catalogue, page I-29, SPB Series Two-Bolt Base Pillow Blocks — Cast Steel Housing.
Bore / Shaft Size: 1-11/16 in (42.9 mm). Bearing Insert Number: RCI-111, a unitized self-aligning replaceable cartridge insert, factory sealed and lubricated, with black-oxide-treated outer race. Rolling Elements: Tapered roller. Static Self-Alignment: ±3°. Expansion Type: Non-expansion. Insert Width (K): 1-11/16 in (42.9 mm).
Basic Dynamic Rating: 6,140 lb (27,312 N). Unit Weight: 12.0 lb (5.44 kg). Operating Temperature Range: –20°F to 220°F. Source for rating and weight: SealMaster Mounted Tapered Roller Bearings catalogue page I-29, SPB-111-2 row.
Housing Width (A): 2-1/8 in (54.0 mm). Overall Length (B): 7-3/4 in (196.9 mm). Base Width (D): 2-5/16 in (58.7 mm). Base Thickness (G): 1-1/4 in (31.8 mm). Cap Dimension (L): 2-7/8 in (73.0 mm). Cap seating angle: 30°. A guide pin in the housing base orientates the cap on reassembly, and a permanent metal nameplate carries the identification.
Locking Method: Double setscrew locking collar. Two locking collars are standard, each with two setscrews at 120° for balanced three-point contact, using diamond-faceted point setscrews. The collars grip a commercial straight shaft directly. Seal Type: Race-mounted felt-lined flinger seal, black oxided, which filters contaminants and stays clear of misalignment distortion. Relubrication: Grease fitting provided in the housing. Two lubrication ports in the cartridge outside diameter align one lube hole with the housing grease fitting at any insert orientation, and a rubber grommet in the housing top recess directs lubricant into the bearing cavity.
SPB: Steel Pillow Block housing type. 111: Bore size in the SealMaster inch scheme, first digit inches and the second and third digits sixteenths, so 111 is 1-11/16 in. Absence of a seal-option letter in front of the bolt digit designates the felt seal; C in that position designates the single-lip contact seal and N the Nomex seal. 2: Two-bolt base; 4 designates a four-bolt base. An E prefix designates the expansion version. Source: SealMaster numbering key, Mounted Tapered Roller Bearings catalogue page I-9.
Alternate designations for this same unit: SPB1112, SPB 111-2 and SPB-111-2. Replacement Insert: RCI-111. Contact-seal variant of the same block: SPB-111-C2. Cast iron version in the same bore: RPB-111-2 with the same RCI-111 insert. Same SPB housing group and bolt centres in adjacent bores: SPB-108-2 at 1-1/2 in, SPB-40MM-2 at 40 mm and SPB-110-2 at 1-5/8 in, which share the 6,140 lb rating, the 4-3/8 in centre height and the 3-3/8 in bolt centres. SPB-112-2 at 1-3/4 in moves to a larger housing with a 4-5/8 in centre height, 3-1/2 in bolt centres and a 5/8 in bolt. Manufacturer Status: SealMaster is a Regal Rexnord brand, catalogued historically under Regal Beloit and Emerson Power Transmission. Application Types: belt and bucket conveyors, head and tail shafts, screw conveyors, aggregate and grain handling, fans and blowers.
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