We ship worldwide — Singapore, Australia, Malaysia, Indonesia, Philippines, India, Middle East & more

MASTERDRIVE Coupling Flange: 4 in Outside Dia, 3 5/16 in Coupling Overall Lg, Inch - General Purpose Straight Jaw Coupling Hubs
MASTERDRIVEGeneral Purpose Straight Jaw Coupling Hubs

MASTERDRIVE Coupling Flange: 4 in Outside Dia, 3 5/16 in Coupling Overall Lg, Inch

The MASTERDRIVE Coupling Flange is a general purpose straight jaw coupling hub with a 4 in outside diameter and a 7/8 in bore diameter. It has an overall length of 3 5/16 in and is an inch-type component (MPN 6J-7/8).

SKU 3G-OTH-157282

Also listed as: 6J78 · 6J 7 8 · 6J-7-8

Brand
MASTERDRIVE
Item
Coupling Flange: 4 in Outside Dia, 3 5/16 in Coupling Overall Lg, Inch
Category
General Purpose 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

Delivery
Worldwide DHL shipping from Singapore; 7–14 business days door-to-door for most destinations.
Payment
Invoicing in USD. Bank transfer (SWIFT) and corporate PO accepted.

Technical Specifications

MASTERDRIVE
Manufacturer Part Number
6J-7/8
Type
Inch
Bore Dia
7/8 in
Coupling Overall Lg
3 5/16 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

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

Product Description

The MASTERDRIVE Coupling Flange is a general purpose straight jaw coupling hub with a 4 in outside diameter and a 7/8 in bore diameter. It has an overall length of 3 5/16 in and is an inch-type component (MPN 6J-7/8).

Frequently Asked Questions

What is a MASTERDRIVE coupling flange used for?

A MASTERDRIVE coupling flange connects a motor shaft to a driven component such as a pump or gearbox. It is a general-purpose straight jaw coupling hub designed for inch-dimension systems. Common applications include industrial machinery, conveyors, and power transmission equipment where misalignment compensation and torque transfer are required.

What are the specifications of the MASTERDRIVE 6J-7/8 coupling flange?

The MASTERDRIVE 6J-7/8 is an inch-type straight jaw coupling hub with a 7/8 in bore diameter, 4 in outside diameter, and 3 5/16 in coupling overall length. It is manufactured by MASTERDRIVE under part number 6J-7/8. This flange is designed for general-purpose power transmission applications.

Where to buy MASTERDRIVE coupling flanges worldwide?

3G Electric supplies MASTERDRIVE coupling flanges worldwide. As a global industrial equipment distributor, we handle full logistics, customs clearance, and delivery to your location. Contact us for availability and lead time on the MASTERDRIVE 6J-7/8 or other inch-type coupling hubs.

How to select the correct MASTERDRIVE coupling flange?

To select the correct MASTERDRIVE coupling flange, match the bore diameter to your shaft size (e.g., 7/8 in), verify the outside diameter and overall length fit your application space, and confirm the inch-type system. Always check torque requirements and alignment tolerances per MASTERDRIVE guidelines for reliable power transmission.

Used in

Common applications for MASTERDRIVE
Pump drives — MASTERDRIVE finished bore close-coupled flanges (e.g., size 8, cast iron) for direct motor-to-pump shaft connections
Conveyor systems — MASTERDRIVE jaw coupling spiders (e.g., L099/100U) for light-duty power transmission between motor and gearbox
Compressor applications — MASTERDRIVE two-piece sleeve coupling inserts (e.g., 9N) for high-torque, moderate-speed compressor drives
Industrial fans — MASTERDRIVE QD bushed flanges (e.g., size 6, JA bushing) for quick installation on fan shafts
Mixer and agitator drives — MASTERDRIVE metric bore flanges (e.g., size 11, 52mm) for European-standard shaft connections
General power transmission — MASTERDRIVE coupling flanges in sizes 5-11 for connecting rotating equipment with parallel shafts

MASTERDRIVE Products

3G Electric supplies MASTERDRIVE general purpose 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
MASTERDRIVE Coupling Flange: 4 in Outside Dia, 3 5/16 in Coupling Overall Lg, Inch (MPN 6J-1-3/8)
MASTERDRIVE
MASTERDRIVE Coupling Flange: 4 in Outside Dia, 3 5/16 in Coupling Overall Lg, Inch (MPN 6J-1-3/8)
MASTERDRIVE Coupling Flange: 4 in Outside Dia, 3 5/16 in Coupling Overall Lg, Inch, 5/8 in Bore Dia (MPN 6J-5/8)
MASTERDRIVE
MASTERDRIVE Coupling Flange: 4 in Outside Dia, 3 5/16 in Coupling Overall Lg, Inch, 5/8 in Bore Dia (MPN 6J-5/8)
MASTERDRIVE Coupling Flange: 4 in Outside Dia, 3 5/16 in Coupling Overall Lg, Inch (MPN 6J-1-1/8)
MASTERDRIVE
MASTERDRIVE Coupling Flange: 4 in Outside Dia, 3 5/16 in Coupling Overall Lg, Inch (MPN 6J-1-1/8)
MASTERDRIVE Coupling Flange: 4 in Outside Dia, 3 5/16 in Coupling Overall Lg, Inch, 3/16 in Bore Dia (MPN 6J-1-3/16)
MASTERDRIVE
MASTERDRIVE Coupling Flange: 4 in Outside Dia, 3 5/16 in Coupling Overall Lg, Inch, 3/16 in Bore Dia (MPN 6J-1-3/16)
MASTERDRIVE Coupling Flange: 4 in Outside Dia, 3 5/16 in Coupling Overall Lg, Inch, 3/4 in Bore Dia (MPN 6J-3/4)
MASTERDRIVE
MASTERDRIVE Coupling Flange: 4 in Outside Dia, 3 5/16 in Coupling Overall Lg, Inch, 3/4 in Bore Dia (MPN 6J-3/4)
MASTERDRIVE Coupling Flange: 4 in Outside Dia, 3 5/16 in Coupling Overall Lg, Inch (MPN 6J-15/16)
MASTERDRIVE
MASTERDRIVE Coupling Flange: 4 in Outside Dia, 3 5/16 in Coupling Overall Lg, Inch (MPN 6J-15/16)

More from MASTERDRIVE

View all MASTERDRIVE parts
MASTERDRIVE Jaw Coupling Hub: L050 Coupling Size, 1 1/16 in Outside Dia, Inch, For Keyed Shaft Type (MPN L050-9/16)
MASTERDRIVE
MASTERDRIVE Jaw Coupling Hub: L050 Coupling Size, 1 1/16 in Outside Dia, Inch, For Keyed Shaft Type (MPN L050-9/16)
MASTERDRIVE Jaw Coupling Hub: L100 Coupling Size, 2 17/32 in Outside Dia, Inch, For Keyed Shaft Type (MPN L100-5/8)
MASTERDRIVE
MASTERDRIVE Jaw Coupling Hub: L100 Coupling Size, 2 17/32 in Outside Dia, Inch, For Keyed Shaft Type (MPN L100-5/8)
MASTERDRIVE Jaw Coupling Hub: L190 Coupling Size, 4 1/2 in Outside Dia, 5 1/4 in Coupling Overall Lg (MPN L190-1-15/16)
MASTERDRIVE
MASTERDRIVE Jaw Coupling Hub: L190 Coupling Size, 4 1/2 in Outside Dia, 5 1/4 in Coupling Overall Lg (MPN L190-1-15/16)
MASTERDRIVE Jaw Coupling Hub: L150 Coupling Size, 3 3/4 in Outside Dia, 4 1/2 in Coupling Overall Lg (MPN L150-42MM)
MASTERDRIVE
MASTERDRIVE Jaw Coupling Hub: L150 Coupling Size, 3 3/4 in Outside Dia, 4 1/2 in Coupling Overall Lg (MPN L150-42MM)
MASTERDRIVE Jaw Coupling Hub: L150 Coupling Size, 3 3/4 in Outside Dia, 4 1/2 in Coupling Overall Lg (MPN L150-1-3/8)
MASTERDRIVE
MASTERDRIVE Jaw Coupling Hub: L150 Coupling Size, 3 3/4 in Outside Dia, 4 1/2 in Coupling Overall Lg (MPN L150-1-3/8)
MASTERDRIVE Jaw Coupling Hub: L225 Coupling Size, 5 in Outside Dia, 6 9/64 in Coupling Overall Lg (MPN L225-2-1/4)
MASTERDRIVE
MASTERDRIVE Jaw Coupling Hub: L225 Coupling Size, 5 in Outside Dia, 6 9/64 in Coupling Overall Lg (MPN L225-2-1/4)
MASTERDRIVE Jaw Coupling Spider: L190 Coupling Size, 4 1/2 in Outside Dia, Inch, 250 RPM Max Speed (MPN L190B)
MASTERDRIVE
MASTERDRIVE Jaw Coupling Spider: L190 Coupling Size, 4 1/2 in Outside Dia, Inch, 250 RPM Max Speed (MPN L190B)
MASTERDRIVE Jaw Coupling Spider: L099/L100 Coupling Size, 2 1/8 in Outside Dia, Inch, 0.228 hp, 80A (MPN L090/095N)
MASTERDRIVE
MASTERDRIVE Jaw Coupling Spider: L099/L100 Coupling Size, 2 1/8 in Outside Dia, Inch, 0.228 hp, 80A (MPN L090/095N)