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

3G Electric
TB WOODS TB WOOD'S Finished Bore Close-Coupled Flange, 4J78 - Finished Bore Close-Coupled Flanges
TB WOODSFinished Bore Close-Coupled Flanges

TB WOODS TB WOOD'S Finished Bore Close-Coupled Flange, 4J78

The TB WOOD'S Sleeve Coupling Flange, model 4J78, is a finished bore close-coupled flange with a 4 coupling size. It features a round keyed bore, an outside diameter of 2 1/2 inches, and a maximum speed of 7,600 RPM…

SKU 3G-OTH-134514

Brand
TB WOODS
Item
TB WOOD'S Finished Bore Close-Coupled Flange, 4J78
Part Number
4J78
Category
Finished Bore Close-Coupled Flanges
Available to Order
Also known as:4J78TB WOODS
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

TB WOODS
Manufacturer Part Number
4J78
Type
Inch
Max Speed
7,600 RPM
Outside Dia
2 1/2 in

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

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

Product Description

The TB WOOD'S Sleeve Coupling Flange, model 4J78, is a finished bore close-coupled flange with a 4 coupling size. It features a round keyed bore, an outside diameter of 2 1/2 inches, and a maximum speed of 7,600 RPM, designed for inch-system applications.

Frequently Asked Questions

What is the TB WOOD'S Sleeve Coupling Flange 4J78 used for?

The TB WOOD'S Sleeve Coupling Flange 4J78 is used to connect two shafts in close-coupled industrial power transmission applications, such as pumps, gearboxes, and conveyors. Its finished bore and round keyed design provide a secure, concentric fit for inch-system shafts, handling speeds up to 7,600 RPM.

What are the specifications of the TB WOOD'S 4J78 coupling flange?

The TB WOOD'S 4J78 is a finished bore close-coupled flange with a 4 coupling size, 2 1/2 inch outside diameter, and round keyed bore. It supports a maximum speed of 7,600 RPM and is designed for inch-system applications. The manufacturer part number is 4J78.

Where to buy the TB WOOD'S 4J78 coupling flange worldwide?

You can source the TB WOOD'S 4J78 coupling flange through 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 TB WOOD'S component.

How to select the correct TB WOOD'S sleeve coupling flange?

To select the correct TB WOOD'S sleeve coupling flange, match the coupling size (e.g., 4 for model 4J78) to your shaft diameter and keyway type. Verify the outside diameter (2 1/2 inches) fits your housing, and ensure the maximum speed rating (7,600 RPM) exceeds your application's operating speed. Always confirm inch-system compatibility.

Used in

Common applications for TB WOODS
Pump drives — TB WOOD'S sleeve coupling flanges (e.g., 4J78) for connecting motor to pump shafts in water treatment plants.
Conveyor systems — TB WOOD'S jaw coupling hubs (e.g., L09925MM) for torque transmission in material handling equipment.
Compressor applications — TB WOOD'S tire coupling hubs (e.g., WE2H78) to accommodate misalignment in air compressor drives.
Industrial fans — TB WOOD'S spacer hubs and flanges (e.g., 6SCHMPB, 6SC44) for extended shaft connections in ventilation systems.
Machine tools — TB WOOD'S two-piece sleeve coupling inserts (e.g., model 5) for vibration dampening in spindle drives.
Mixers and agitators — TB WOOD'S finished bore close-coupled flanges for direct coupling in chemical processing equipment.
Not sure this is the right part? Photo-identify it

TB WOODS Products

3G Electric supplies TB WOODS finished bore close-coupled flanges. 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

More from TB WOODS

View all TB WOODS parts

Customer reviews

No reviews yet — be the first

Questions & answers

No questions yet — ask us the first