Send a part number, a photo, or a whole BOM — we supply it and stand behind it. Worldwide shipping to 80+ countries.

NTN 3920-TRB Tapered Roller Bearing Cup - Tapered Roller Bearing Cups
NTNTapered Roller Bearing Cups

NTN 3920-TRB Tapered Roller Bearing Cup

The NTN Tapered Roller Bearing Cup (SKU 3920-TRB, MPN 3920-TRB) is an inch-system cup with a 3 57/64 in bore, 4 27/64 in OD, and 0.937 in cup/overall width. It is made of alloy steel and is compatible with cone…

SKU 3G-OTH-107646

Also listed as: 3920TRB · 3920 TRB

Brand
NTN
Item
3920-TRB Tapered Roller Bearing Cup
Category
Tapered Roller Bearing Cups
Available to Order
Trade pricing by quote — replies within 24h
Qty
WhatsApp an engineerMessage via Telegram
No account needed — your quote request goes straight to our engineers. A free account lets you track quotes and re-order faster.
Worldwide Shipping
Air & sea freight
Datasheet on Request
Technical specs
1-Day Quote
Replies within 24h

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

NTN
Manufacturer Part Number
3920-TRB
OD
4 27/64 in
Cup Wd
0.937 in
Overall Wd
0.937 in
Ring Material
Alloy Steel
System of Measurement
Inch
Compatible Cone Manufacturer Part Number
3975

Technical Documents

No technical documents available for this product.
Request documentation
Not sure this is the right part? Get a recommendation.

Need installation or engineering help?

Installation, commissioning, maintenance plans, system design, and bundled product + service quotes — one team handles the full scope.
Talk to an engineer

Ask a question

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

Product Description

The NTN Tapered Roller Bearing Cup (SKU 3920-TRB, MPN 3920-TRB) is an inch-system cup with a 3 57/64 in bore, 4 27/64 in OD, and 0.937 in cup/overall width. It is made of alloy steel and is compatible with cone manufacturer part number 3975.

Frequently Asked Questions

What is the NTN 3920-TRB tapered roller bearing cup used for?

The NTN 3920-TRB cup is used in tapered roller bearing assemblies to support radial and axial loads in industrial machinery, such as gearboxes, conveyors, and pumps. It pairs with cone 3975 to form a complete bearing set for rotating shafts.

What are the specifications of the NTN 3920-TRB bearing cup?

The NTN 3920-TRB cup has a 3 57/64 in bore, 4 27/64 in OD, and 0.937 in cup width. It is made of alloy steel, uses inch-system measurement, and is compatible with cone manufacturer part number 3975.

Where to buy the NTN 3920-TRB bearing cup worldwide?

3G Electric supplies the NTN 3920-TRB bearing cup worldwide. As a global industrial solutions provider, we handle full logistics and customs clearance to deliver this genuine NTN component to your facility, regardless of location.

How to install the NTN 3920-TRB tapered roller bearing cup?

Press the NTN 3920-TRB cup into the housing bore using an arbor press or suitable driver, ensuring it seats squarely against the shoulder. Apply a light oil film to the cup raceway before inserting the cone assembly. Follow NTN's recommended interference fits for inch-system cups.

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.

You might also need

Burners & Combustion Pumps & Compressors Spare Parts All Products

Compatible alternatives & equivalents

Cross-referenced by specification & description
Inch-system tapered roller bearing cup made of alloy steel. Outer diameter 3 3/8 in, cup width 0.937 in. Designed to pair with cone part number 3872 for supporting radial and axial loads in rotating shaft assemblies
NTN
Inch-system tapered roller bearing cup made of alloy steel. Outer diameter 3 3/8 in, cup width 0.937 in. Designed to pair with cone part number 3872 for supporting radial and axial loads in rotating shaft assemblies
NTN 4535 is an inch-system tapered roller bearing cup made of alloy steel. It has an outside diameter of 2 1/2 inches, a cup width of 0.625 inches, and is compatible with cone MPN 4395. This cup is used in industrial machinery such as gearboxes and conveyor systems to support radial and axial loads
NTN
NTN 4535 is an inch-system tapered roller bearing cup made of alloy steel. It has an outside diameter of 2 1/2 inches, a cup width of 0.625 inches, and is compatible with cone MPN 4395. This cup is used in industrial machinery such as gearboxes and conveyor systems to support radial and axial loads
The NTN 394A is an inch-system tapered roller bearing cup made of alloy steel. It has an outer diameter of 4 21/64 inches and a cup width of 0.741 inches. This cup is designed to pair with cone part number 399A to form a complete bearing assembly for supporting radial and axial loads in industrial equipment such as gearboxes, conveyors, and heavy machinery
NTN
The NTN 394A is an inch-system tapered roller bearing cup made of alloy steel. It has an outer diameter of 4 21/64 inches and a cup width of 0.741 inches. This cup is designed to pair with cone part number 399A to form a complete bearing assembly for supporting radial and axial loads in industrial equipment such as gearboxes, conveyors, and heavy machinery
NTN 47820 tapered roller bearing cup, inch system, with 5 3/4 in outer diameter and 1.031 in cup width. Made of alloy steel. Compatible with cone part number 47890. Used in industrial machinery and automotive drivetrains to support radial and axial loads
NTN
NTN 47820 tapered roller bearing cup, inch system, with 5 3/4 in outer diameter and 1.031 in cup width. Made of alloy steel. Compatible with cone part number 47890. Used in industrial machinery and automotive drivetrains to support radial and axial loads
NTN 27620 is an inch-system tapered roller bearing cup made of alloy steel. It has an outside diameter of 4 59/64 inches and a cup width of 0.781 inches. This cup is used in industrial machinery such as gearboxes and conveyor systems to support radial and axial loads when paired with cone 27687
NTN
NTN 27620 is an inch-system tapered roller bearing cup made of alloy steel. It has an outside diameter of 4 59/64 inches and a cup width of 0.781 inches. This cup is used in industrial machinery such as gearboxes and conveyor systems to support radial and axial loads when paired with cone 27687
This NTN tapered roller bearing cup is made of alloy steel and has an outside diameter of 3 59/64 in, a cup width of 0.781 in, and an overall width of 0.781 in. It is designed for inch-system applications and pairs with cone part number 28985 to form a complete bearing set. Tapered roller bearing cups are used in rotating shaft assemblies to support radial and axial loads in equipment such as gearboxes, conveyors, and pumps
NTN
This NTN tapered roller bearing cup is made of alloy steel and has an outside diameter of 3 59/64 in, a cup width of 0.781 in, and an overall width of 0.781 in. It is designed for inch-system applications and pairs with cone part number 28985 to form a complete bearing set. Tapered roller bearing cups are used in rotating shaft assemblies to support radial and axial loads in equipment such as gearboxes, conveyors, and pumps

More from NTN

View all NTN parts
Inch-system tapered roller bearing cup made of alloy steel. Outer diameter 4 1/16 in, cup width 0.472 in, overall width 0.472 in. Designed to pair with cone part number L812148. Used as the outer race in tapered roller bearing assemblies to support combined radial and axial loads in rotating machinery
NTN
Inch-system tapered roller bearing cup made of alloy steel. Outer diameter 4 1/16 in, cup width 0.472 in, overall width 0.472 in. Designed to pair with cone part number L812148. Used as the outer race in tapered roller bearing assemblies to support combined radial and axial loads in rotating machinery
The NTN 4T-414 is an inch-system tapered roller bearing cup made from alloy steel. It has an outer diameter of 3 15/32 in, a cup width of 0.875 in, and an overall width of 0.875 in. This cup is compatible with cone manufacturer part number 420 and is used in bearing assemblies for supporting radial and axial loads in industrial machinery such as gearboxes, conveyors, and pumps
NTN
The NTN 4T-414 is an inch-system tapered roller bearing cup made from alloy steel. It has an outer diameter of 3 15/32 in, a cup width of 0.875 in, and an overall width of 0.875 in. This cup is compatible with cone manufacturer part number 420 and is used in bearing assemblies for supporting radial and axial loads in industrial machinery such as gearboxes, conveyors, and pumps
Alloy steel tapered roller bearing cup with 1-7/8 in outside diameter, 0.66 in cup width, and 0.47 in overall width. Inch-system component designed for use with L68149 cone in bearing assemblies supporting radial and axial loads on rotating shafts
NTN
Alloy steel tapered roller bearing cup with 1-7/8 in outside diameter, 0.66 in cup width, and 0.47 in overall width. Inch-system component designed for use with L68149 cone in bearing assemblies supporting radial and axial loads on rotating shafts
Inch-system tapered roller bearing cup made of alloy steel. Cup width 1.496 in, overall width 1.885 in. Compatible with cone part number JH217249. Used in bearing assemblies to support radial and axial loads in rotating equipment such as gearboxes, conveyors, and pumps
NTN
Inch-system tapered roller bearing cup made of alloy steel. Cup width 1.496 in, overall width 1.885 in. Compatible with cone part number JH217249. Used in bearing assemblies to support radial and axial loads in rotating equipment such as gearboxes, conveyors, and pumps
Alloy steel tapered roller bearing cup with 3 17/64 in outside diameter and 0.75 in cup width. Designed for inch-system bearing assemblies to support combined radial and axial loads in industrial equipment such as gearboxes, conveyors, and pumps. Compatible with NTN cones 4T-25590, 4T-25581, 4T-25580, 4T-25577, 4T-25572, and 4T-25578
NTN
Alloy steel tapered roller bearing cup with 3 17/64 in outside diameter and 0.75 in cup width. Designed for inch-system bearing assemblies to support combined radial and axial loads in industrial equipment such as gearboxes, conveyors, and pumps. Compatible with NTN cones 4T-25590, 4T-25581, 4T-25580, 4T-25577, 4T-25572, and 4T-25578
NTN Tapered Roller Bearing Cup: 3 1/4 in OD, 0.75 in Cup Wd, 0.75 in Overall Wd, 4T-25519
NTN
NTN Tapered Roller Bearing Cup: 3 1/4 in OD, 0.75 in Cup Wd, 0.75 in Overall Wd, 4T-25519
Inch-system tapered roller bearing cup made of alloy steel. Outside diameter 3 3/4 in, cup width 0.875 in, overall width 0.875 in. Compatible with cone part number 33889. Used in bearing assemblies for industrial equipment such as gearboxes and conveyors
NTN
Inch-system tapered roller bearing cup made of alloy steel. Outside diameter 3 3/4 in, cup width 0.875 in, overall width 0.875 in. Compatible with cone part number 33889. Used in bearing assemblies for industrial equipment such as gearboxes and conveyors
Tapered roller bearing cup made of alloy steel, inch-system, with 6 1/2 in outer diameter and 1.062 in cup width. Compatible with cone 56418. Used as outer ring in tapered roller bearing assemblies for supporting radial and axial loads in rotating equipment
NTN
Tapered roller bearing cup made of alloy steel, inch-system, with 6 1/2 in outer diameter and 1.062 in cup width. Compatible with cone 56418. Used as outer ring in tapered roller bearing assemblies for supporting radial and axial loads in rotating equipment