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

BOSTON GEAR High-Torque Straight Jaw Coupling Hub, FC45 1-7/8 - High-Torque Straight Jaw Coupling Hubs
BOSTON GEARHigh-Torque Straight Jaw Coupling Hubs

BOSTON GEAR High-Torque Straight Jaw Coupling Hub, FC45 1-7/8

The BOSTON GEAR FC45 Shaft Coupler Body is a high-torque straight jaw coupling hub in inch size, designed for keyed shaft types. It has a 4 1/2 in outside diameter and is identified by manufacturer part number FC45…

SKU 3G-OTH-146659

Also listed as: FC45178 · FC45 1 7 8 · FC45-1-7-8

Brand
BOSTON GEAR
Item
High-Torque Straight Jaw Coupling Hub, FC45 1-7/8
Category
High-Torque Straight Jaw Coupling 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

BOSTON GEAR
Manufacturer Part Number
FC45 1-7/8
Type
Inch, For Keyed Shaft Type
Outside Dia
4 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

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

Product Description

The BOSTON GEAR FC45 Shaft Coupler Body is a high-torque straight jaw coupling hub in inch size, designed for keyed shaft types. It has a 4 1/2 in outside diameter and is identified by manufacturer part number FC45 1-7/8.

Frequently Asked Questions

What is a BOSTON GEAR FC45 shaft coupler used for?

The BOSTON GEAR FC45 straight jaw coupling hub connects two rotating shafts in power transmission systems, compensating for minor misalignment while transmitting torque. It is commonly used in industrial machinery, conveyors, pumps, and gearboxes across machining, material handling, and other plant-floor applications.

What are the specifications of the BOSTON GEAR FC45 1-7/8 coupling?

This BOSTON GEAR FC45 coupling hub has a 4 1/2 in outside diameter, fits inch keyed shafts, and is part of the high-torque straight jaw coupling series. The manufacturer part number is FC45 1-7/8. It is designed for reliable torque transmission in industrial power transmission systems.

Where to buy BOSTON GEAR FC45 couplings worldwide?

3G Electric supplies BOSTON GEAR FC45 couplings worldwide, handling full logistics, customs clearance, and delivery to your site. As a global industrial solutions provider, we source genuine parts across 14 departments, including power transmission. Contact us for pricing and lead time on this coupling hub.

How to select the right BOSTON GEAR jaw coupling hub?

To select the correct BOSTON GEAR jaw coupling hub, match the outside diameter and bore size to your shaft dimensions, and confirm the coupling type (straight jaw for high torque). Verify shaft keyway size and ensure the hub material suits your operating environment. Consult a power transmission specialist for application-specific guidance.

Used in

Common applications for BOSTON GEAR
Material handling conveyors — Boston Gear worm gear speed reducers for belt drives
Packaging machinery — Boston Gear helical gear reducers for precise indexing
Food processing equipment — Boston Gear stainless steel speed reducers for washdown environments
Industrial pump drives — Boston Gear clamp collars for shaft coupling alignment
Mixer and agitator systems — Boston Gear oil-impregnated spider inserts for torque transmission
Automated assembly lines — Boston Gear mounting bases for horizontal reducer installation

BOSTON GEAR Products

3G Electric supplies BOSTON GEAR high-torque straight jaw coupling 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
Inch-sized straight jaw coupling hub for keyed shafts, with a 4 1/2 in outside diameter. Provides a positive-drive connection in power transmission systems, accommodating misalignment and dampening vibration in applications such as conveyors, pumps, and gearboxes
BOSTON GEAR
Inch-sized straight jaw coupling hub for keyed shafts, with a 4 1/2 in outside diameter. Provides a positive-drive connection in power transmission systems, accommodating misalignment and dampening vibration in applications such as conveyors, pumps, and gearboxes
Inch-series straight jaw coupling hub for keyed shafts, with 4 1/2 in outside diameter. Used in power transmission systems to connect rotating shafts in pumps, compressors, conveyors, and gearboxes, accommodating misalignment while transmitting torque
BOSTON GEAR
Inch-series straight jaw coupling hub for keyed shafts, with 4 1/2 in outside diameter. Used in power transmission systems to connect rotating shafts in pumps, compressors, conveyors, and gearboxes, accommodating misalignment while transmitting torque
Inch-sized high-torque straight jaw coupling hub for keyed shafts. Outside diameter 2 1/2 in. Used in power transmission systems to connect rotating shafts, compensating for minor misalignment. Suitable for industrial machinery, conveyors, pumps, and gearboxes
BOSTON GEAR
Inch-sized high-torque straight jaw coupling hub for keyed shafts. Outside diameter 2 1/2 in. Used in power transmission systems to connect rotating shafts, compensating for minor misalignment. Suitable for industrial machinery, conveyors, pumps, and gearboxes
Inch-sized straight jaw coupling hub for keyed shafts. Outside diameter 2 1/2 in. Used to connect rotating shafts in power transmission systems, accommodating misalignment and transmitting torque in industrial machinery such as pumps, conveyors, and gearboxes
BOSTON GEAR
Inch-sized straight jaw coupling hub for keyed shafts. Outside diameter 2 1/2 in. Used to connect rotating shafts in power transmission systems, accommodating misalignment and transmitting torque in industrial machinery such as pumps, conveyors, and gearboxes
Inch-series straight jaw coupling hub for keyed shafts, with 2 1/2 in outside diameter. Designed for high-torque applications in power transmission systems, such as connecting shafts in conveyors, pumps, gearboxes, and material handling equipment
BOSTON GEAR
Inch-series straight jaw coupling hub for keyed shafts, with 2 1/2 in outside diameter. Designed for high-torque applications in power transmission systems, such as connecting shafts in conveyors, pumps, gearboxes, and material handling equipment
This high-torque straight jaw coupling hub is designed for inch-sized keyed shafts, with a 2 1/2 in outside diameter. It is used in power transmission systems to connect rotating shafts while compensating for minor misalignment. Typical applications include industrial machinery, pumps, gearboxes, and conveyors
BOSTON GEAR
This high-torque straight jaw coupling hub is designed for inch-sized keyed shafts, with a 2 1/2 in outside diameter. It is used in power transmission systems to connect rotating shafts while compensating for minor misalignment. Typical applications include industrial machinery, pumps, gearboxes, and conveyors

More from BOSTON GEAR

View all BOSTON GEAR parts
This straight jaw coupling hub has a 3 in outside diameter and a 5 15/32 in overall length. It is used in power transmission systems to connect rotating shafts, accommodating minor misalignment while transmitting torque. Common applications include pumps, gearboxes, conveyors, and material handling equipment
BOSTON GEAR
This straight jaw coupling hub has a 3 in outside diameter and a 5 15/32 in overall length. It is used in power transmission systems to connect rotating shafts, accommodating minor misalignment while transmitting torque. Common applications include pumps, gearboxes, conveyors, and material handling equipment
This straight jaw coupling hub has a 3 in outside diameter and a 5 15/32 in overall length. It is used to connect rotating shafts in power transmission systems, transmitting torque while accommodating minor misalignment. Typical applications include conveyors, pumps, and gearboxes
BOSTON GEAR
This straight jaw coupling hub has a 3 in outside diameter and a 5 15/32 in overall length. It is used to connect rotating shafts in power transmission systems, transmitting torque while accommodating minor misalignment. Typical applications include conveyors, pumps, and gearboxes
High-torque straight jaw coupling hub for FC30 coupling size. Outside diameter 3 in, overall length 5 15/32 in. Connects rotating shafts in power transmission systems, accommodating minor misalignment and transmitting torque in applications such as conveyors, pumps, and gearboxes
BOSTON GEAR
High-torque straight jaw coupling hub for FC30 coupling size. Outside diameter 3 in, overall length 5 15/32 in. Connects rotating shafts in power transmission systems, accommodating minor misalignment and transmitting torque in applications such as conveyors, pumps, and gearboxes
Straight jaw coupling hub for connecting rotating shafts in power transmission systems. Outside diameter 2 in, overall length 3 11/16 in. Accommodates misalignment and dampens vibration in industrial machinery such as conveyors, pumps, and gearboxes
BOSTON GEAR
Straight jaw coupling hub for connecting rotating shafts in power transmission systems. Outside diameter 2 in, overall length 3 11/16 in. Accommodates misalignment and dampens vibration in industrial machinery such as conveyors, pumps, and gearboxes
This straight jaw coupling hub is designed for connecting two rotating shafts in power transmission systems, accommodating minor misalignment while transmitting torque. It features a 1 1/4 in outside diameter and is intended for use with inch keyed shafts. Typical applications include industrial machinery, conveyors, and pumps
BOSTON GEAR
This straight jaw coupling hub is designed for connecting two rotating shafts in power transmission systems, accommodating minor misalignment while transmitting torque. It features a 1 1/4 in outside diameter and is intended for use with inch keyed shafts. Typical applications include industrial machinery, conveyors, and pumps
Inch-series straight jaw coupling hub for keyed shafts. Outside diameter 1 1/2 in. Used in power transmission systems to connect rotating shafts, compensating for minor misalignment while transmitting torque. Common in conveyors, pumps, and gearbox applications
BOSTON GEAR
Inch-series straight jaw coupling hub for keyed shafts. Outside diameter 1 1/2 in. Used in power transmission systems to connect rotating shafts, compensating for minor misalignment while transmitting torque. Common in conveyors, pumps, and gearbox applications
Straight jaw coupling hub for connecting two rotating shafts in industrial machinery. FC20 coupling size with 2 in outside diameter and 3 11/16 in overall length. Transmits torque while accommodating minor misalignment in pumps, gearboxes, conveyors, and material handling equipment
BOSTON GEAR
Straight jaw coupling hub for connecting two rotating shafts in industrial machinery. FC20 coupling size with 2 in outside diameter and 3 11/16 in overall length. Transmits torque while accommodating minor misalignment in pumps, gearboxes, conveyors, and material handling equipment
This straight jaw coupling hub is designed for inch keyed shafts and has a 1 1/2 in outside diameter. It is part of the FC15 coupling size family and is used in power transmission systems to connect rotating shafts, accommodating misalignment while transferring torque
BOSTON GEAR
This straight jaw coupling hub is designed for inch keyed shafts and has a 1 1/2 in outside diameter. It is part of the FC15 coupling size family and is used in power transmission systems to connect rotating shafts, accommodating misalignment while transferring torque