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

TB WOODS 8SCH178 Finished Bore Spacer Hub, 3 1/4 in OD, 4,500 RPM - Finished Bore Spacer Hubs
TB WOODSFinished Bore Spacer Hubs

TB WOODS 8SCH178 Finished Bore Spacer Hub, 3 1/4 in OD, 4,500 RPM

The TB WOOD'S Sleeve Coupling Spacer Hub is a Finished Bore Spacer Hub in the 8 Coupling Size, designed for use with sleeve couplings. This inch-dimensioned hub features a round keyed bore and has a maximum speed of…

SKU 3G-OTH-135112

Brand
TB WOODS
Item
8SCH178 Finished Bore Spacer Hub, 3 1/4 in OD, 4,500 RPM
Category
Finished Bore Spacer Hubs
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

TB WOODS
Manufacturer Part Number
8SCH178
Max Speed
4,500 RPM
Outside Dia
3 1/4 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 Spacer Hub is a Finished Bore Spacer Hub in the 8 Coupling Size, designed for use with sleeve couplings. This inch-dimensioned hub features a round keyed bore and has a maximum speed of 4,500 RPM with a 3 1/4 inch outside diameter (MPN 8SCH178).

Frequently Asked Questions

What is the TB WOOD'S Sleeve Coupling Spacer Hub used for?

The TB WOOD'S Sleeve Coupling Spacer Hub is used in industrial power transmission systems to connect shafts via a sleeve coupling. It accommodates misalignment and transmits torque in applications such as conveyors, pumps, and compressors. This inch-dimensioned hub with a round keyed bore is designed for reliable performance in heavy-duty machinery.

What are the specifications of the TB WOOD'S 8SCH178 Sleeve Coupling Spacer Hub?

The TB WOOD'S 8SCH178 Sleeve Coupling Spacer Hub has a coupling size of 8, a maximum speed of 4,500 RPM, and an outside diameter of 3 1/4 inches. It features a round keyed bore and is inch-dimensioned. This finished bore spacer hub is designed for use with sleeve couplings in industrial power transmission applications.

Where to buy TB WOOD'S Sleeve Coupling Spacer Hub worldwide?

You can source the TB WOOD'S Sleeve Coupling Spacer Hub worldwide through 3G Electric, a global industrial equipment distributor. We handle full logistics, customs clearance, and delivery to your location. Contact us for availability and lead time. 3G Electric provides reliable sourcing for TB WOOD'S power transmission components.

How to select the correct TB WOOD'S Sleeve Coupling Spacer Hub?

To select the correct TB WOOD'S Sleeve Coupling Spacer Hub, match the coupling size, bore type (round keyed), and shaft diameter to your application. Verify the maximum speed rating of 4,500 RPM and outside diameter of 3 1/4 inches. Ensure the hub is compatible with your sleeve coupling assembly. Consult TB WOOD'S technical documentation for precise fitment.

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.

TB WOODS Products

3G Electric supplies TB WOODS finished bore spacer hubs. 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
TB WOOD'S Sleeve Coupling Spacer Hub: 8 Coupling Size, 4,500 RPM Max Speed, 3 1/4 in Outside Dia (MPN 8SCH138)
TB WOODS
TB WOOD'S Sleeve Coupling Spacer Hub: 8 Coupling Size, 4,500 RPM Max Speed, 3 1/4 in Outside Dia (MPN 8SCH138)
Finished bore spacer hub for use in power transmission systems to connect shafts while accommodating misalignment. Features a round keyed bore, 3 1/4 in outside diameter, and maximum speed of 4,500 RPM. Suitable for applications requiring a spacer between coupled components for maintenance access
TB WOODS
Finished bore spacer hub for use in power transmission systems to connect shafts while accommodating misalignment. Features a round keyed bore, 3 1/4 in outside diameter, and maximum speed of 4,500 RPM. Suitable for applications requiring a spacer between coupled components for maintenance access
This finished bore spacer hub is designed for 8 coupling size applications. It features a round keyed bore, inch dimensions, a 3 1/4 in outside diameter, and a maximum speed of 4,500 RPM. Used in power transmission systems to connect shafts while allowing for misalignment, it facilitates maintenance access in applications such as pumps, compressors, and conveyors
TB WOODS
This finished bore spacer hub is designed for 8 coupling size applications. It features a round keyed bore, inch dimensions, a 3 1/4 in outside diameter, and a maximum speed of 4,500 RPM. Used in power transmission systems to connect shafts while allowing for misalignment, it facilitates maintenance access in applications such as pumps, compressors, and conveyors
TB WOOD'S Sleeve Coupling Spacer Hub: 10 Coupling Size, 3,600 RPM Max Speed, 4 3/8 in Outside Dia (MPN 10SCH158)
TB WOODS
TB WOOD'S Sleeve Coupling Spacer Hub: 10 Coupling Size, 3,600 RPM Max Speed, 4 3/8 in Outside Dia (MPN 10SCH158)
Finished bore spacer hub for shaft coupling in power transmission systems. Accommodates misalignment in industrial machinery such as pumps, conveyors, and gearboxes. Features a round keyed bore and inch-dimension design. Maximum speed 3,600 RPM, outside diameter 4 3/8 in
TB WOODS
Finished bore spacer hub for shaft coupling in power transmission systems. Accommodates misalignment in industrial machinery such as pumps, conveyors, and gearboxes. Features a round keyed bore and inch-dimension design. Maximum speed 3,600 RPM, outside diameter 4 3/8 in
Finished bore spacer hub for connecting shafts in power transmission systems. Designed for inch-dimension round keyed shafts. Outside diameter 5 1/4 in, maximum speed 3,600 RPM. Suitable for use in pumps, conveyors, and industrial machinery
TB WOODS
Finished bore spacer hub for connecting shafts in power transmission systems. Designed for inch-dimension round keyed shafts. Outside diameter 5 1/4 in, maximum speed 3,600 RPM. Suitable for use in pumps, conveyors, and industrial machinery

More from TB WOODS

View all TB WOODS parts
Finished bore spacer hub for use in power transmission systems to connect shafts while accommodating misalignment and axial movement. Features a round keyed bore, 3 1/4 in outside diameter, and maximum speed of 4,500 RPM. Suitable for industrial machinery, pumps, and conveyors requiring a spacer hub for maintenance access
TB WOODS
Finished bore spacer hub for use in power transmission systems to connect shafts while accommodating misalignment and axial movement. Features a round keyed bore, 3 1/4 in outside diameter, and maximum speed of 4,500 RPM. Suitable for industrial machinery, pumps, and conveyors requiring a spacer hub for maintenance access
Finished bore spacer hub for sleeve couplings, inch-dimensioned with a round keyed bore. Outside diameter 2 1/2 in, maximum speed 6000 RPM. Used in power transmission systems to connect shafts, accommodate misalignment, and transmit torque in pumps, conveyors, and compressors
TB WOODS
Finished bore spacer hub for sleeve couplings, inch-dimensioned with a round keyed bore. Outside diameter 2 1/2 in, maximum speed 6000 RPM. Used in power transmission systems to connect shafts, accommodate misalignment, and transmit torque in pumps, conveyors, and compressors
Finished bore spacer hub with round keyed bore and inch dimensions. Coupling size 7, outside diameter 2 13/16 in, maximum speed 5,250 RPM. Used in power transmission systems to connect shafts while accommodating misalignment and axial movement, commonly applied in pumps, compressors, and conveyor drives
TB WOODS
Finished bore spacer hub with round keyed bore and inch dimensions. Coupling size 7, outside diameter 2 13/16 in, maximum speed 5,250 RPM. Used in power transmission systems to connect shafts while accommodating misalignment and axial movement, commonly applied in pumps, compressors, and conveyor drives
Finished bore spacer hub for coupling size 11, with a round keyed bore and 5 1/4 in outside diameter. Rated for maximum speed of 3,600 RPM. Used in power transmission systems to connect shafts and accommodate misalignment in industrial machinery such as pumps, conveyors, and gearboxes
TB WOODS
Finished bore spacer hub for coupling size 11, with a round keyed bore and 5 1/4 in outside diameter. Rated for maximum speed of 3,600 RPM. Used in power transmission systems to connect shafts and accommodate misalignment in industrial machinery such as pumps, conveyors, and gearboxes
Finished bore spacer hub with a round keyed bore, designed for use with sleeve couplings in power transmission systems. Accommodates shaft misalignment and transmits torque in applications such as pumps, conveyors, and compressors. Outside diameter 2 1/2 in, maximum speed 6,000 RPM
TB WOODS
Finished bore spacer hub with a round keyed bore, designed for use with sleeve couplings in power transmission systems. Accommodates shaft misalignment and transmits torque in applications such as pumps, conveyors, and compressors. Outside diameter 2 1/2 in, maximum speed 6,000 RPM
Finished bore spacer hub with round keyed bore and inch dimensions. Outside diameter 2 13/16 in, maximum speed 5,250 RPM. Used in power transmission systems to connect shafts while allowing for misalignment, commonly in pumps, compressors, and conveyors
TB WOODS
Finished bore spacer hub with round keyed bore and inch dimensions. Outside diameter 2 13/16 in, maximum speed 5,250 RPM. Used in power transmission systems to connect shafts while allowing for misalignment, commonly in pumps, compressors, and conveyors
Finished bore spacer hub for sleeve couplings, size 10, with a round keyed bore. Outside diameter 4 3/8 inches, maximum speed 3600 RPM. Used in power transmission systems to connect shafts, allowing for misalignment and axial movement, commonly applied in pumps, compressors, and conveyors
TB WOODS
Finished bore spacer hub for sleeve couplings, size 10, with a round keyed bore. Outside diameter 4 3/8 inches, maximum speed 3600 RPM. Used in power transmission systems to connect shafts, allowing for misalignment and axial movement, commonly applied in pumps, compressors, and conveyors
Finished bore spacer hub for shaft coupling applications. Outside diameter 3 5/8 in, maximum speed 3,750 RPM. Designed for inch-dimension systems with a round keyed bore. Used in power transmission systems to connect shafts and accommodate misalignment
TB WOODS
Finished bore spacer hub for shaft coupling applications. Outside diameter 3 5/8 in, maximum speed 3,750 RPM. Designed for inch-dimension systems with a round keyed bore. Used in power transmission systems to connect shafts and accommodate misalignment