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SMITH BEARING Needle Roller Bearing Inner Ring, IRR-3-3/4, 3 3/4 in Bore - Needle Roller Bearing Inner Rings
SMITH BEARINGNeedle Roller Bearing Inner Rings

SMITH BEARING Needle Roller Bearing Inner Ring, IRR-3-3/4, 3 3/4 in Bore

The SMITH BEARING Inner Ring (SKU IRR-3-3/4, IRR-3-3/4) is an inch-system needle roller bearing inner ring with a 3 3/4 in bore, 4.248 in OD, and 2.01 in overall width, constructed from alloy steel. This component is…

SKU 3G-OTH-103174

Also listed as: IRR334 · IRR 3 3 4 · IRR-3-3-4

Brand
SMITH BEARING
Item
Needle Roller Bearing Inner Ring, IRR-3-3/4, 3 3/4 in Bore
Category
Needle Roller Bearing Inner Rings
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Local availability & support — Singapore

Local office
20 Woodlands Link #09-05, Singapore 738733
Phone
+65 8878 8355
Delivery
Same-day or next-business-day delivery within Singapore for in-stock items; 7–14 days for factory-order parts from Europe.
Payment
Invoicing in SGD. PayNow, bank transfer, and corporate PO accepted.
Ships to
Singapore

Technical Specifications

SMITH BEARING
Manufacturer Part Number
IRR-3-3/4
Type
Alloy Steel, IRR-3-3/4
OD
4.248 in
Overall Wd
2.01 in
System of Measurement
Inch

Technical Documents

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

Product Description

The SMITH BEARING Inner Ring (SKU IRR-3-3/4, IRR-3-3/4) is an inch-system needle roller bearing inner ring with a 3 3/4 in bore, 4.248 in OD, and 2.01 in overall width, constructed from alloy steel. This component is designed for use with compatible needle roller bearings to support radial loads in industrial equipment.

Frequently Asked Questions

What is the SMITH BEARING Inner Ring IRR-3-3/4 used for?

The SMITH BEARING Inner Ring IRR-3-3/4 is used as a component in needle roller bearing assemblies to support radial loads in industrial equipment such as gearboxes, pumps, and conveyors. It provides a precision-ground raceway for needle rollers, enabling smooth rotation under heavy loads.

What are the specifications of the SMITH BEARING Inner Ring IRR-3-3/4?

The SMITH BEARING Inner Ring IRR-3-3/4 has a 3 3/4 in bore, 4.248 in OD, and 2.01 in overall width. It is made of alloy steel and uses the inch system of measurement. The manufacturer part number is IRR-3-3/4, and it is designed for use with compatible needle roller bearings.

Where to buy the SMITH BEARING Inner Ring IRR-3-3/4 worldwide?

You can source the SMITH BEARING Inner Ring IRR-3-3/4 from 3G Electric, a global industrial equipment distributor. We handle full logistics, customs clearance, and delivery to worldwide destinations. Contact us for availability and lead time on this SMITH BEARING component.

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 3/4 in for IRR-3-3/4) to your shaft diameter, and ensure the OD and overall width fit your housing. Verify the system of measurement (inch) and load rating requirements. Consult the SMITH BEARING catalog for compatible needle roller bearings.

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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Alloy steel inner ring for needle roller bearings, inch system. Bore 1-1/2 in, OD 1.749 in, overall width 1.26 in. Provides a hardened raceway for needle rollers in rotating assemblies such as gearboxes, pumps, and material handling equipment
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This inch-system inner ring is made from alloy steel and has a bore of 2-7/16 in, an outer diameter of 2.998 in, and an overall width of 1.76 in. It is designed for use with compatible needle roller bearings in applications requiring compact radial load support, such as gearboxes, pumps, and conveyor systems
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