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NTN Tapered Roller Bearing Cup: 3 31/32 in Bore, 4 21/64 in OD, 0.741 in Cup Wd - Tapered Roller Bearing Cups
NTNTapered Roller Bearing Cups

NTN Tapered Roller Bearing Cup: 3 31/32 in Bore, 4 21/64 in OD, 0.741 in Cup Wd

The NTN Tapered Roller Bearing Cup (SKU 394A, MPN 394A) is an inch-system cup with a 3 31/32 in bore, 4 21/64 in OD, and 0.741 in cup/overall width. It is made of alloy steel and is compatible with cone MPN 399A.

SKU 3G-OTH-111244

Also listed as: 394 A · 394-A

Brand
NTN
Item
Tapered Roller Bearing Cup: 3 31/32 in Bore, 4 21/64 in OD, 0.741 in Cup Wd
Category
Tapered Roller Bearing Cups
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Local availability & support — the Philippines

Delivery
5–8 business days door-to-door; Bureau of Customs clearance typically 2–4 business days.
Payment
Invoicing in PHP or USD. Bank transfer and corporate PO accepted.
Ships to
Manila, Quezon City, Cebu, Davao, Batangas

Technical Specifications

NTN
Manufacturer Part Number
394A
OD
4 21/64 in
Cup Wd
0.741 in
Overall Wd
0.741 in
Ring Material
Alloy Steel
System of Measurement
Inch
Compatible Cone Manufacturer Part Number
399A

Technical Documents

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

Product Description

The NTN Tapered Roller Bearing Cup (SKU 394A, MPN 394A) is an inch-system cup with a 3 31/32 in bore, 4 21/64 in OD, and 0.741 in cup/overall width. It is made of alloy steel and is compatible with cone MPN 399A.

Supplied to the Philippines — compatible with 60 Hz installations. DHL Express delivery to Manila, Quezon City, Cebu, customs and duties handled door-to-door.

Frequently Asked Questions

What is the NTN 394A tapered roller bearing cup used for?

The NTN 394A cup is used in tapered roller bearing assemblies to support radial and axial loads in industrial equipment such as gearboxes, conveyors, and heavy machinery. It pairs with cone 399A to form a complete bearing set, enabling smooth rotation under high load conditions.

What are the specifications of the NTN 394A bearing cup?

The NTN 394A cup has a 3 31/32 in bore, 4 21/64 in OD, and 0.741 in cup width. It is made of alloy steel, uses inch-system measurement, and is compatible with cone part number 399A. The manufacturer part number is 394A.

Where to buy the NTN 394A bearing cup worldwide?

3G Electric supplies the NTN 394A bearing cup worldwide. As a global industrial distributor, we handle full logistics, customs clearance, and delivery to your location. Contact us for availability and lead time; we source and deliver this component to any country.

How to select the correct NTN tapered roller bearing cup?

To select the correct NTN cup, match the bore, OD, and width to your application. The 394A cup requires the compatible cone 399A. Verify the system of measurement (inch) and ring material (alloy steel) against your load and speed requirements. Consult NTN specifications for proper fit.

Used in

Common applications for NTN
Automotive driveline — NTN tapered roller bearing assemblies (e.g., 4T-30303) for differential and wheel hub applications
Conveyor systems — NTN 4-bolt flange bearings (e.g., UCF211-200D1) for idler rollers and take-up units
Machine tool spindles — NTN duplex angular contact bearings (e.g., ML7006CVDUJ74S) for high-speed precision rotation
Industrial fans — NTN high-temperature radial ball bearings (e.g., 6004FT150) for oven and dryer exhaust systems
Pump drives — NTN radial ball bearings (e.g., 6008LLBC3/L627) for electric motor and pump shaft support
Agricultural equipment — NTN tapered roller bearing cones (e.g., LM29748L) for gearbox and PTO shaft assemblies

NTN Products

3G Electric supplies NTN tapered roller bearing cups. 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
NTN Tapered Roller Bearing Cup: 3 1/2 in Bore, 3 59/64 in OD, 0.781 in Cup Wd, 0.781 in Overall Wd (MPN 28921)
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NTN Tapered Roller Bearing Cup: 3 1/2 in Bore, 3 59/64 in OD, 0.781 in Cup Wd, 0.781 in Overall Wd (MPN 28921)
NTN Tapered Roller Bearing Cup: 3 49/64 in Bore, 4 1/4 in OD, 0.75 in Cup Wd, 0.75 in Overall Wd (MPN 29520)
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NTN Tapered Roller Bearing Cup: 3 49/64 in Bore, 4 1/4 in OD, 0.75 in Cup Wd, 0.75 in Overall Wd (MPN 29520)
NTN Tapered Roller Bearing Cup: 3 1/64 in Bore, 2 1/2 in OD, 0.625 in Cup Wd, 0.625 in Overall Wd (MPN 4535)
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NTN Tapered Roller Bearing Cup: 3 1/64 in Bore, 2 1/2 in OD, 0.625 in Cup Wd, 0.625 in Overall Wd (MPN 4535)
NTN Tapered Roller Bearing Cup: 3 13/16 in OD, 0.625 in Cup Wd, 0.625 in Overall Wd, 382A
NTN
NTN Tapered Roller Bearing Cup: 3 13/16 in OD, 0.625 in Cup Wd, 0.625 in Overall Wd, 382A
NTN Tapered Roller Bearing Cup: 3 39/64 in Bore, 4 1/8 in OD, 0.969 in Cup Wd, 0.969 in Overall Wd (MPN 453X)
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NTN Tapered Roller Bearing Cup: 3 39/64 in Bore, 4 1/8 in OD, 0.969 in Cup Wd, 0.969 in Overall Wd (MPN 453X)
NTN Tapered Roller Bearing Cup: 3 57/64 in Bore, 4 27/64 in OD, 0.937 in Cup Wd, 0.937 in Overall Wd (MPN 3920-TRB)
NTN
NTN Tapered Roller Bearing Cup: 3 57/64 in Bore, 4 27/64 in OD, 0.937 in Cup Wd, 0.937 in Overall Wd (MPN 3920-TRB)

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