The 11 Best 1 inch Shaft adapters (2023 reviews)

There are several advantages of having a 1 inch shaft adapter. Let’s take you step by step, type by type, and find the best 1 inch shaft adapter for you.

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Our Top Picks:

Xtremeamazing 1 inch Shaft adapter Buy: READ REVIEW

MR Hello 1 inch Shaft adapter Buy: READ REVIEW

Jgr 1 inch Shaft adapter Buy: READ REVIEW

Qiilu 1 inch Shaft adapter Buy: READ REVIEW

Carbbia 1 inch Shaft adapter Buy: READ REVIEW

Suprojdm 1 inch Shaft adapter Buy: READ REVIEW

Koulate 1 inch Shaft adapter Buy: READ REVIEW

Zjchao 1 inch Shaft adapter Buy: READ REVIEW

Estink 1 inch Shaft adapter Buy: READ REVIEW

Kuuleyn 1 inch Shaft adapter Buy: READ REVIEW

Aramox 1 inch Shaft adapter Buy: READ REVIEW

Xtremeamazing 1 inch Shaft adapter

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For a low asking price, xtremeamazing 1 inch shaft adapter has managed to overwhelm their customers by packing as many features as they could. These make a great crankshaft holding tool so you do not damage your crankshaft while properly torquing the flywheel nut. It is used to shim motor shaft to fit a hammer mill flywheel. The key has some burrs on each end that require clean up. The sleeve fits perfectly and is packaged well. They come with an adapter key that must be used.

The key could be a bit taller, add about 1/32 to the height of the 5/16 side and it would be a better fit. It fits any 3/4 inch shaft including a predator.

• Adapted perfectly to the smaller shaft
• Great shim for a small shaft
• Good brand reputation

MR Hello 1 inch Shaft adapter

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We know from years of feedback from readers, customers and amazon sellers, what most people want in a convenient and appropriate adapter. The mr hello 1 inch shaft adapter is exactly that - it's a simple adapter that hits all the right notes. Most push mower engines have 7/8” or 1” PTO shafts and there are various styles of blade adapters. This steel shaft sleeve adapts a crankshaft from 3/4” to 1” diameter. It works with gas engine crank shafts to enlarge the crank diameter to fit pulleys, gear boxes etc. The sleeve and step key are designed to exact fit on your 3/4” diameter. It comes with step key that offsets from 3/16” to 1/. The sleeve is a very good, zero apparent wobble fit.

• Adapts larger wheel bores to smaller axels
• Good brand reputation

Jgr 1 inch Shaft adapter

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We would, of course, be remiss if we didn't mention jgr 1 inch shaft adapter for daily purpose. This shaft sleeve adapts a crankshaft from 3/4” to 1” diameter. It works with gas engine crank shafts to enlarge the crank diameter to fit pulleys, gear boxes etc.

• New and hot release
• One of the new comers and featured product

Qiilu 1 inch Shaft adapter

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This steel shaft sleeve adapter is made from cold rolled steel material with precision cnc machining and tumbling, which is durable in use, has reliable quality and long service life. The 3/4 inch to 1 inch crank shaft sleeve adapter adapts larger wheel bores to smaller axles, works with gas engine crank shafts to enlarge the crank diameter to fit pulleys, gear boxes etc. It alters motors with a different diameter shaft and alters pulleys for a different speed or belt, which is very practical.

The 3/4 inch to 1 inch gas engine pulley adapter reduces the necessity of buying a new motor or pulley to maintain existing components and speed / power requirements. It comes with step key that offsets from 3/16 inch to 1/4 inch.

• Made from cold rolled steel, cnc precision machined and tumbled, high durability
• New and hot release

Carbbia 1 inch Shaft adapter

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The carbbia 1 inch shaft adapter should be able to handle its purpose and duties with ease. It works with gas engine crank shafts to enlarge the crank diameter to fit pulleys, gear boxes etc. The sleeve and step key are designed to exact fit on your 3/4” diameter crankshaft with 3/16” keyway and enlarge it to 1” diameter with 1/4” keyway.

• Adapts larger wheel bores to smaller axels
• Lot of satisfied buyers

Suprojdm 1 inch Shaft adapter

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Compared with other adapter in this category, the suprojdm 1 inch shaft adapter has a convenient design. The adapter is 3 inches long and includes the custom key needed to go from the adapter to your pulley or clutch.

• Good brand reputation
• Good investment for long term

Koulate 1 inch Shaft adapter

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It is 100% brand new 3/4 inch to 1 inch crank sleeve adapter with step key. It includes an adapter and keyway, the wider part of the key is located in the adapter. It is made from cold rolled steel, CNC precision machined and tumbled, with high durability.

It is approximately 2.3 inches long and includes the step key needed to go from the 1/4 in key way to the 3/16 key way. It will fit any motor with a 3/4 inch shaft and 3/16 inch keyway, it is used to convert a crankshaft from 3/4 inch to 1 inch shaft. The original parts have factory quality inspection, the quality is reliable, and other parts will not be damaged due to replacement parts damage.

• Delivers what they promise
• Good brand reputation

Zjchao 1 inch Shaft adapter

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The zjchao 1 inch shaft adapter is satisfactory and appropriate and fits well with your regular usage. This is a 100% brand new 3/4 inch to 1 inch crank sleeve adapter with step key. It will fit any motor with a 3/4 inch shaft and 3/16 inch keyway, it is used to convert a crankshaft from 3/4 inch to 1 inch shaft. It is approximately 2.3 inches long and includes the step key needed to go from the 1/4 in key way to the 3/16 key way. It allows you to use your old or pulley on a new engine, you may need to use a small hammer to gently tap it in to place for tightly fit.

• Good investment for long term
• One of the new comers and featured product

Estink 1 inch Shaft adapter

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Next on the list, we've got yet another adapter that manages to win our hearts. It's the estink 1 inch shaft adapter and it's widely considered as one of the best convenient adapter you can buy. It is 100% brand new 7/8 inch to 1 inch crank sleeve adapter with step key. It is used to convert a crankshaft from 7/8 inch to 1 inch shaft. It is made from cold rolled steel, CNC precision machined and tumbled, with high durability. It allows you to use your old clutch or pulley on a new engine, you may need to use a small hammer to gently tap it in to place for tightly fit. It is approximately 3 inches long and includes the step key needed to go from the 1/4 key way to the 3/16 key way.

• One of the new comers and featured product
• Good investment for long term

Kuuleyn 1 inch Shaft adapter

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The pulley crank shaft sleeve adapter includes an adapter and keyway, the wider part of the key is located in the adapter. It is used to convert a crankshaft from 7/8 inch to 1 inch shaft. This shaft sleeve adapter can allow you to use the old clutch or pulley on the new engine, you may need to use a small hammer to tap in to make it fit tightly.

The crank shaft sleeve adapter is made of cold-rolled steel, CNC precision processed and rolled, durable and not easy to damage. It is approximately 3 inches long and includes the step key needed to go from the 1/4 key way to the 3/16 key way.

• Made from cold rolled steel, cnc precision machined and tumbled, high durability
• Lot of satisfied buyers

Aramox 1 inch Shaft adapter

Buy on Amazon

The aramox 1 inch shaft adapter should be able to handle its purpose and duties with ease. This steel shaft sleeve adapts a crankshaft from 3/4in to 1in diameter. It works with gas engine crank shafts to enlarge the crank diameter to fit pulleys, gear boxes etc. It comes with step key that offsets from 3/16in to 1/4in. It is suitable for crankshafts with diameters from 3/4 inch to 1 inch, with step keys offset from 3/16 inch to 1/4 inch. It is very easy to install, you can easily complete the installation without complicated tools, and it is easy to use, saving you time and effort.

• Alters motors with a different diameter shaft
• Adapts larger wheel bores to smaller axels
• New and hot release