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SEALMASTER 4 Bolt Flange Bearing: Radial Ball, 1 1/4 in Bore, Cast Iron - General Purpose Flange-Mount Ball Bearings
SEALMASTERGeneral Purpose Flange-Mount Ball Bearings

SEALMASTER 4 Bolt Flange Bearing: Radial Ball, 1 1/4 in Bore, Cast Iron

The SEALMASTER 4 Bolt Flange Bearing: Radial Ball (SKU SF-20, MPN SF-20) is a general purpose flange-mount ball bearing with a 1 1/4 in cylindrical bore and a cast iron housing. It features set screws for shaft…

SKU 3G-OTH-111516

Also listed as: SF20 · SF 20

Brand
SEALMASTER
Item
4 Bolt Flange Bearing: Radial Ball, 1 1/4 in Bore, Cast Iron
Category
General Purpose Flange-Mount Ball Bearings
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Local availability & support

Delivery
Worldwide DHL shipping from Singapore; 7–14 business days door-to-door for most destinations.
Payment
Invoicing in USD. Bank transfer (SWIFT) and corporate PO accepted.

Technical Specifications

SEALMASTER
Manufacturer Part Number
SF-20
Type
Cast Iron, Set Screws
Bore
1 1/4 in
Lg
4 19/32 in
Bore Type
Cylindrical
Lubricant Material
NLGI #2 Equivalent
Mounting Bolt Size
7/16 in
System of Measurement
Inch

Technical Documents

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SEALMASTER Products
3G Electric (S) Pte. Ltd. — Singapore

Product Description

The SEALMASTER 4 Bolt Flange Bearing: Radial Ball (SKU SF-20, MPN SF-20) is a general purpose flange-mount ball bearing with a 1 1/4 in cylindrical bore and a cast iron housing. It features set screws for shaft locking, a mounting bolt size of 7/16 in, and is lubricated with NLGI #2 Equivalent grease. This inch-system bearing measures 4 19/32 in in length.

Frequently Asked Questions

What is a SEALMASTER 4 Bolt Flange Bearing used for?

The SEALMASTER SF-20 4 bolt flange bearing supports rotating shafts in industrial machinery such as conveyors, fans, and pumps. Its cast iron housing and set-screw locking suit moderate-load, general-purpose applications where radial loads and misalignment are minimal.

What are the specifications of the SEALMASTER SF-20 bearing?

The SEALMASTER SF-20 has a 1 1/4 in cylindrical bore, cast iron housing with set screws, and a 4 19/32 in length. It uses NLGI #2 Equivalent grease, requires a 7/16 in mounting bolt, and is an inch-system radial ball bearing for general-purpose flange mounting.

Where to buy SEALMASTER SF-20 flange bearings worldwide?

3G Electric supplies the SEALMASTER SF-20 4 bolt flange bearing to customers worldwide. We handle full logistics, customs clearance, and delivery to your site. Contact us for pricing and lead time on this inch-system radial ball bearing with a 1 1/4 in bore.

How to install a SEALMASTER 4 bolt flange bearing?

To install the SEALMASTER SF-20, align the flange to the mounting surface and tighten bolts to the recommended torque for a 7/16 in fastener. Secure the shaft using the set screws, then apply NLGI #2 grease per the manufacturer's schedule. Ensure the housing is free of debris before mounting.

Used in

Common applications for SEALMASTER
Conveyor systems — SEALMASTER NP series pillow block bearings for belt conveyor idler shafts
Material handling fans — SEALMASTER SFT series flange bearings for fan housing mounting
Pump drives — SEALMASTER MP series medium-duty pillow blocks for pump shaft support
Agricultural equipment — SEALMASTER ER series insert bearings in auger and elevator assemblies
Packaging machinery — SEALMASTER NPL low-base pillow blocks for compact conveyor sections
Industrial blowers — SEALMASTER SFT-23 flange bearing for blower shaft end support

SEALMASTER Products

3G Electric supplies SEALMASTER general purpose flange-mount ball bearings. We supply genuine products with in-stock availability on common SKUs, technical documentation, commissioning support, and warranty service — worldwide.

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Compatible alternatives & equivalents

Cross-referenced by specification & description
SEALMASTER 4 Bolt Flange Bearing: Radial Ball, 1 3/16 in Bore, Cast Iron, Set Screws, 4 1/4 in Lg (MPN SF-19)
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SEALMASTER 4 Bolt Flange Bearing: Radial Ball, 1 3/16 in Bore, Cast Iron, Set Screws, 4 1/4 in Lg (MPN SF-19)
SEALMASTER Pillow Block Bearing: 1 1/4 in Bore, Cast Iron, Set Screws, 1 7/8 in Shaft Ht, NP-20
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SEALMASTER Pillow Block Bearing: 1 1/4 in Bore, Cast Iron, Set Screws, 1 7/8 in Shaft Ht, NP-20
SEALMASTER Pillow Block Bearing: 4 in Bore, Cast Iron, Set Screws, 5 in Shaft Ht, 17 in Overall Lg (MPN MP-64)
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SEALMASTER Pillow Block Bearing: 4 in Bore, Cast Iron, Set Screws, 5 in Shaft Ht, 17 in Overall Lg (MPN MP-64)
Sleeve Bearing: Bronze, SAE 841, 2 in Bore, 2 1/4 in OD, 2 in Lg, 50,000 lb/sq in-fpm Max PV (MPN AA2203-B)
OILITE
Sleeve Bearing: Bronze, SAE 841, 2 in Bore, 2 1/4 in OD, 2 in Lg, 50,000 lb/sq in-fpm Max PV (MPN AA2203-B)
Sleeve Bearing: Bronze, SAE 841, 28 mm Bore, 36 mm OD, 40 mm Lg, 49,938 lb/sq in-fpm Max PV, 2 PK (MPN AAM2836-40B)
OILITE
Sleeve Bearing: Bronze, SAE 841, 28 mm Bore, 36 mm OD, 40 mm Lg, 49,938 lb/sq in-fpm Max PV, 2 PK (MPN AAM2836-40B)
Sleeve Bearing: Bronze, SAE 841, 4 mm Bore, 7 mm OD, 8 mm Lg, 49,938 lb/sq in-fpm Max PV, 10 PK (MPN AAM0407-08B)
OILITE
Sleeve Bearing: Bronze, SAE 841, 4 mm Bore, 7 mm OD, 8 mm Lg, 49,938 lb/sq in-fpm Max PV, 10 PK (MPN AAM0407-08B)

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