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SMITH BEARINGNeedle Roller Bearing Inner Rings

SMITH BEARING Inner Ring: 3 7/8 in Bore, 4.498 in OD, 2.26 in Overall Wd, Alloy Steel

The SMITH BEARING Inner Ring (SKU 49ER38) is a needle roller bearing inner ring with a 3 7/8 in bore, 4.498 in OD, and 2.26 in overall width, made of alloy steel. This inch-system component, model IRR-3-7/8, is…

SKU 3G-OTH-103275

Brand
SMITH BEARING
Item
Inner Ring: 3 7/8 in Bore, 4.498 in OD, 2.26 in Overall Wd, Alloy Steel
Category
Needle Roller Bearing Inner Rings
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Technical Specifications

SMITH BEARING
Manufacturer Part Number
IRR-3-7/8
Type
Alloy Steel, IRR-3-7/8
OD
4.498 in
Overall Wd
2.26 in
System of Measurement
Inch
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Technical Documents

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

Product Description

The SMITH BEARING Inner Ring (SKU 49ER38) is a needle roller bearing inner ring with a 3 7/8 in bore, 4.498 in OD, and 2.26 in overall width, made of alloy steel. This inch-system component, model IRR-3-7/8, is designed for use with compatible needle roller bearings.

Frequently Asked Questions

What is the SMITH BEARING Inner Ring IRR-3-7/8 used for?

The SMITH BEARING Inner Ring IRR-3-7/8 is a needle roller bearing inner ring used in industrial machinery to provide a precision raceway for needle rollers. It supports radial loads in applications such as gearboxes, pumps, and conveyor systems, ensuring smooth rotation and extended bearing life.

What are the specifications of the SMITH BEARING Inner Ring IRR-3-7/8?

The SMITH BEARING Inner Ring IRR-3-7/8 has a 3 7/8 in bore, 4.498 in OD, and 2.26 in overall width. It is made of alloy steel, uses an inch system of measurement, and is manufactured by SMITH BEARING under part number IRR-3-7/8. It is designed for use with compatible needle roller bearings.

Where to buy the SMITH BEARING Inner Ring IRR-3-7/8 worldwide?

You can source the SMITH BEARING Inner Ring IRR-3-7/8 through 3G Electric, a global industrial equipment distributor. We handle full logistics, customs clearance, and delivery to worldwide destinations, ensuring the component reaches your facility reliably. Contact us for availability and lead time.

How to select the correct SMITH BEARING Inner Ring for an application?

To select the correct SMITH BEARING Inner Ring, match the bore size (3 7/8 in), OD (4.498 in), and overall width (2.26 in) to your housing and shaft dimensions. Ensure the system of measurement (inch) aligns with your assembly. Consult the SMITH BEARING catalog for compatible needle roller bearings and load ratings.

Used in

Common applications for SMITH BEARING
Packaging machinery — SMITH BEARING MCR series stud cam followers for cam actuation in carton erectors and case sealers.
Conveyor systems — SMITH BEARING HR series heavy stud cam followers for roller guidance in belt conveyors and chain drives.
Automated assembly lines — SMITH BEARING BYR series yoke cam followers for linear motion guides in pick-and-place units.
Food processing equipment — SMITH BEARING HR-2-1/4-XB-SS-FG stainless steel cam followers for washdown conveyor systems.
Material handling — SMITH BEARING BCR-7/8-X non-metallic cam followers for low-noise roller tracks in sortation systems.
Industrial printing presses — SMITH BEARING MCRV-90-SB track rollers for web guiding and tension control mechanisms.

SMITH BEARING Products

3G Electric supplies SMITH BEARING needle roller bearing inner rings. We supply genuine products with in-stock availability on common SKUs, technical documentation, commissioning support, and warranty service — worldwide.

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