Looking for the best 3/4 inch to 7/8 inch shaft diameter adapters? We’ve got you covered with a selection of 10 top-quality adapters designed to save you money and improve your equipment’s performance.
Need to match a motor or pulley to a different shaft size? 3/4 inch to 7/8 inch shaft diameter adapters are your cost-effective solution. These handy tools let you adjust for speed or belt setups without buying new parts.
Whether you’re working on a gas engine, car engine, or even a drill attachment, these adapters are easy to install and built to last. Made from durable materials like stainless steel and aluminum alloy, they ensure a tight fit and smooth operation.
Save money, improve performance, and extend the life of your equipment with these versatile adapters.
List of Top 10 3/4 Inch To 7/8 Inch Shaft Diameter Adapters
| Image | Title | Best For | Price |
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3mirrors Crank Shaft Sleeve Adapter 3/4″ to 7/8″ Stainless Steel adapter for Gas Engine Pulley Bore Reducer Sleeve Bushing w/ 3/16 Key |
This 3mirrors Crank Shaft Sleeve Adapter is perfect for DIY enthusiasts and auto mechanics who need to fit pulleys or gearboxes to gas engines. It’s great for saving money by reusing old parts instead of buying new ones. |
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3/4″ to 7/8″ Crank Shaft Adapter Stainless Steel Crank Shaft Sleeve w/ 3/16 Key for Gas Engine Pulley Crank Shaft Predator Pulley |
This 3/4″ to 7/8″ Crank Shaft Adapter is perfect for DIY enthusiasts and handy homeowners who want to save money and maintain their gas engines. It’s ideal for upgrading or repairing engines without buying new parts. |
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MXSAG New 3/4″ to 7/8″ Inch 3″ Long Crankshaft Sleeve Adapter 3/16″ Keyway Slot w/Keystock, Stainless Steel Gas Engine Crank Shaft Sleeve Adaptor Pulley Wheel Bore Reducer Predator 2″ Step Key |
This adapter is perfect for anyone who needs to change pulley speeds, fix motors, or save money by using existing parts. It’s great for gas engines and works well with crankshafts, pulleys, and gear boxes. |
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3/4 to 7/8 Shaft Adapter, 3/4″ to 7/8″ Engine Pulley Crank Shaft Sleeve Adapter Bushing & Keystock |
This shaft adapter is perfect for anyone who needs to match motors and pulleys with different shaft sizes. It’s ideal for DIY projects or engine upgrades, saving you money and time. |
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Two Stage Auger Adapter Auger Drill Converter for 3/4″ and 7/8″ Inner Diameter Auger Shaft, Drill Attachment for Digging Holes |
This two-stage auger adapter is perfect for gardeners, ice fishers, and DIY enthusiasts. It’s easy to use and works with most drills, making digging holes in soil or ice quick and effortless. |
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Partuto 1 Set 3/4″ to 7/8″ Universal Crank Shaft Sleeve Adapter – Car Gas Engine Pulley Crank Shaft Sleeve Adapter with Step Key – Metal Silver Tone |
This Partuto Crank Shaft Sleeve Adapter is perfect for car owners who want to extend the life of their gas engine. It’s easy to install and fits most cars, making it a great choice for anyone needing a reliable replacement part. |
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X AUTOHAUX 3/4″ to 7/8″ Inch Engine Shaft Sleeve Adapter Kit with Step Key for Car |
This shaft sleeve adapter kit is perfect for car enthusiasts and DIY mechanics who want to upgrade their engine without buying new parts. It’s easy to use and saves money by letting you reuse old clutches or pulleys on new engines. |
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ACROPIX 1 Set 3/4″ to 7/8″ Universal Crank Shaft Sleeve Adapter – Car Gas Engine Pulley Crank Shaft Sleeve Adapter with Step Key – Metal Silver Tone Car Parts |
This ACROPIX Crank Shaft Sleeve Adapter is perfect for car owners who want to extend the life of their gas engine. It’s easy to install and fits most cars, making it a great choice for simple upgrades. |
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3/4″ to 7/8″ inch w/Key Gas Engine pulley Crank Shaft Sleeve adapter Predator |
This adapter is perfect for anyone who needs to connect a 3/4″ pulley to a 7/8″ crank shaft. It’s ideal for gas engine projects and works great with Predator engines. |
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Hihaha 3/4″ to 7/8″ Inch Engine Shaft Sleeve Adapter Kit with Step Key for Car Durable Material |
This Hihaha Shaft Sleeve Adapter Kit is perfect for car enthusiasts and mechanics who need to adapt engine shafts or pulleys without buying new parts. It’s easy to use and saves money by letting you reuse existing components. |
Detailed Reviews
Discover the top 10 3/4 inch to 7/8 inch shaft diameter adapters in this expert-curated guide. Each product is thoroughly reviewed for durability, ease of use, and value, ensuring you find the perfect fit for your needs. Whether upgrading engines or saving costs, this guide simplifies your choice and boosts confidence in your decision.
1. 3mirrors Crank Shaft Sleeve Adapter 3/4″ to 7/8″ Stainless Steel adapter for Gas Engine Pulley Bore Reducer Sleeve Bushing w/ 3/16 Key

The 3mirrors Crank Shaft Sleeve Adapter is a stainless steel tool. It changes a 3/4″ shaft to fit a 7/8″ pulley. This adapter is strong and rust-free.
Made from Stainless Steel 304, it’s durable and long-lasting. It saves money by reusing old parts. Easy to install for DIY projects.
It works with gas engines to adjust shaft sizes. Helps fit pulleys or gearboxes easily. 3mirrors offers reliable auto parts.
| Pros | Cons |
|---|---|
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Perfect For:
This 3mirrors Crank Shaft Sleeve Adapter is perfect for DIY enthusiasts and auto mechanics who need to fit pulleys or gearboxes to gas engines. It’s great for saving money by reusing old parts instead of buying new ones.
Ready to Purchase?
2. 3/4″ to 7/8″ Crank Shaft Adapter Stainless Steel Crank Shaft Sleeve w/ 3/16 Key for Gas Engine Pulley Crank Shaft Predator Pulley

Upgrade your engine with the 3/4″ to 7/8″ Crank Shaft Adapter. This stainless steel sleeve is a cost-effective solution for enlarging your crank diameter.
Made from high-quality Stainless Steel 304, it’s durable and long-lasting. It helps you maintain existing components and meet speed/power requirements.
Easy to install, adapts larger wheel bores, and saves you money.
| Pros | Cons |
|---|---|
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Perfect For:
This 3/4″ to 7/8″ Crank Shaft Adapter is perfect for DIY enthusiasts and handy homeowners who want to save money and maintain their gas engines. It’s ideal for upgrading or repairing engines without buying new parts.
Ready to Purchase?
3. MXSAG New 3/4″ to 7/8″ Inch 3″ Long Crankshaft Sleeve Adapter 3/16″ Keyway Slot w/Keystock, Stainless Steel Gas Engine Crank Shaft Sleeve Adaptor Pulley Wheel Bore Reducer Predator 2″ Step Key

Upgrade your engine with the MXSAG Crankshaft Sleeve Adapter. This stainless steel kit is a simple solution for altering pulleys and motors.
It enlarges a 3/4″ crankshaft to 7/8″, allowing for different speeds and belt options. The CNC-machined adapter ensures precision and strength.
Package includes: sleeve and keystock. Easy to install, cost-effective, and versatile.
| Pros | Cons |
|---|---|
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Perfect For:
This adapter is perfect for anyone who needs to change pulley speeds, fix motors, or save money by using existing parts. It’s great for gas engines and works well with crankshafts, pulleys, and gear boxes.
Ready to Purchase?
4. 3/4 to 7/8 Shaft Adapter, 3/4″ to 7/8″ Engine Pulley Crank Shaft Sleeve Adapter Bushing & Keystock

Need to match a motor or pulley to a different shaft size? This 3/4 to 7/8 Shaft Adapter is your cost-effective solution. It lets you adjust for speed or belt setups without buying new parts.
Made from durable aluminum alloy, this adapter is built to last. It works with gas engine crankshafts and lets you fit pulleys, gearboxes, and more easily.
Saves money, improves performance, easy to use.
| Pros | Cons |
|---|---|
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Perfect For:
This shaft adapter is perfect for anyone who needs to match motors and pulleys with different shaft sizes. It’s ideal for DIY projects or engine upgrades, saving you money and time.
Ready to Purchase?
5. Two Stage Auger Adapter Auger Drill Converter for 3/4″ and 7/8″ Inner Diameter Auger Shaft, Drill Attachment for Digging Holes

This two-stage auger adapter fits 3/4″ and 7/8″ auger shafts. It works with a 1/2-inch chuck power drill. It’s easy to use and boosts drilling efficiency.
Made from durable 45 steel, it handles heavy pressure and lasts long. Its wear resistance ensures reliable performance for tough tasks.
Perfect for gardening, soil drilling, and ice fishing. It connects drills to ice augers for effortless ice hole drilling.
| Pros | Cons |
|---|---|
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Perfect For:
This two-stage auger adapter is perfect for gardeners, ice fishers, and DIY enthusiasts. It’s easy to use and works with most drills, making digging holes in soil or ice quick and effortless.
Ready to Purchase?
6. Partuto 1 Set 3/4″ to 7/8″ Universal Crank Shaft Sleeve Adapter – Car Gas Engine Pulley Crank Shaft Sleeve Adapter with Step Key – Metal Silver Tone

The Partuto Crank Shaft Sleeve Adapter is a durable metal tool for car engines. It extends the life of gas engine crank shafts with its upgraded design. This universal adapter fits most cars, making it a versatile choice.
It’s easy to install with no tools needed. The set includes 1 adapter and 2 step keys, ensuring a complete solution for your needs.
| Pros | Cons |
|---|---|
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Perfect For:
This Partuto Crank Shaft Sleeve Adapter is perfect for car owners who want to extend the life of their gas engine. It’s easy to install and fits most cars, making it a great choice for anyone needing a reliable replacement part.
Ready to Purchase?
7. X AUTOHAUX 3/4″ to 7/8″ Inch Engine Shaft Sleeve Adapter Kit with Step Key for Car

The X AUTOHAUX Shaft Sleeve Adapter Kit is a handy tool for engine repairs. It adapts a crankshaft from 3/4″ to 7/8″ diameter, making it versatile for various motor applications.
Made from stainless steel, this adapter kit is durable and long-lasting. It’s precision machined and tumbled to ensure a perfect fit and maximum strength, making it ideal for engine upgrades.
Easy to install, saves money, works great.
| Pros | Cons |
|---|---|
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Perfect For:
This shaft sleeve adapter kit is perfect for car enthusiasts and DIY mechanics who want to upgrade their engine without buying new parts. It’s easy to use and saves money by letting you reuse old clutches or pulleys on new engines.
Ready to Purchase?
8. ACROPIX 1 Set 3/4″ to 7/8″ Universal Crank Shaft Sleeve Adapter – Car Gas Engine Pulley Crank Shaft Sleeve Adapter with Step Key – Metal Silver Tone Car Parts

The ACROPIX Crank Shaft Sleeve Adapter is a durable metal part for your car’s engine. It extends the life of your gas engine crank shaft. This universal adapter fits most cars easily.
It comes in a 3/4″ to 7/8″ size, so measure your crank shaft before buying. The upgraded design ensures a longer service life for your engine.
Installation is simple and tool-free. The set includes 1 adapter and 2 step keys. It’s a reliable choice for car maintenance.
| Pros | Cons |
|---|---|
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Perfect For:
This ACROPIX Crank Shaft Sleeve Adapter is perfect for car owners who want to extend the life of their gas engine. It’s easy to install and fits most cars, making it a great choice for simple upgrades.
Ready to Purchase?
9. 3/4″ to 7/8″ inch w/Key Gas Engine pulley Crank Shaft Sleeve adapter Predator

The 3/4″ to 7/8″ inch w/Key Gas Engine pulley Crank Shaft Sleeve adapter Predator is a handy tool for engine work. It helps connect different shaft sizes easily. This adapter is built to last with strong materials.
It works well with gas engines and saves time during repairs. The key feature ensures a secure fit for smooth operation.
This adapter is easy to install and fits Predator engines perfectly. It’s a must-have for anyone working on engines. Get it to make your projects run smoothly.
| Pros | Cons |
|---|---|
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Perfect For:
This adapter is perfect for anyone who needs to connect a 3/4″ pulley to a 7/8″ crank shaft. It’s ideal for gas engine projects and works great with Predator engines.
Ready to Purchase?
10. Hihaha 3/4″ to 7/8″ Inch Engine Shaft Sleeve Adapter Kit with Step Key for Car Durable Material

The Hihaha Shaft Sleeve Adapter Kit is a handy tool for car engines. It adapts a 3/4″ shaft to 7/8″ with ease. Made from stainless steel, it’s built to last.
This kit saves you money by reusing old parts. It works with gas engine crankshafts and pulleys. You can avoid buying new motors or pulleys with it.
The package includes one shaft sleeve adapter kit. It’s easy to install with a tight fit. Perfect for durable, long-lasting use.
| Pros | Cons |
|---|---|
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Perfect For:
This Hihaha Shaft Sleeve Adapter Kit is perfect for car enthusiasts and mechanics who need to adapt engine shafts or pulleys without buying new parts. It’s easy to use and saves money by letting you reuse existing components.
Ready to Purchase?
Buying Guide
Need to match a motor or pulley to a different shaft size? 3/4 inch to 7/8 inch shaft diameter adapters are your cost-effective solution. These handy tools let you adjust for speed or belt setups without buying new parts.
Whether you’re working on a gas engine, car engine, or even a drill attachment, these adapters are easy to install and built to last. Made from durable materials like stainless steel and aluminum alloy, they ensure a tight fit and smooth operation.
Here’s what to consider when buying the best 3/4 inch to 7/8 inch shaft diameter adapters:
- Material: Choose stainless steel for rust-free and long-lasting use, or aluminum alloy for a lightweight and affordable option.
- Compatibility: Ensure the adapter fits your gas engine, car engine, or drill attachment perfectly.
- Ease of Installation: Look for adapters that are easy to install, often requiring no tools for setup.
- Durability: Opt for CNC-machined or precision-made adapters for strength and reliability.
- Cost-Effectiveness: Save money by choosing adapters that let you reuse existing parts instead of buying new ones.
- Versatility: Pick adapters that work with pulleys, gearboxes, or augers for multiple applications.
- Included Accessories: Some kits come with keys or keystocks for a complete solution.
Upgrade your equipment with the right adapter and enjoy improved performance and extended life for your tools.