If you have ever wrestled with a PTO shaft that is just a bit too short or mismatched for your implement, you know the frustration. A quality PTO adapter can save you time, money, and a lot of headaches by bridging the gap between your tractor and attachment.
This guide reviews ten of the best PTO adapters on the market, focusing on fitment, build quality, and ease of installation. Whether you need a simple extension or a spline conversion, we have got you covered.
CERTAIN CONTENT THAT APPEARS ON THIS SITE COMES FROM AMAZON. THIS CONTENT IS PROVIDED “AS IS” AND IS SUBJECT TO CHANGE OR REMOVAL AT ANY TIME.
PTO Extender for Tractor,PTO Shaft Extension 1-3/8" & 6 Spline Female/Male
Best forQuick length adjustments
- Heavy-duty metal build
- Precision spline fit
ConsiderLimited to 70 HP
GZZTORES PTO Extender for Tractor, Female 1-3/8" & 6 Spline
Best forCorrosion-resistant durability
- Corrosion-resistant metal
- Easy installation steps
ConsiderMax 70 HP rating
New Heavy Duty PTO Extender Adapter for Tractor PTO Shaft Extension, Univer…
Best forSpline size conversion
- High-strength alloy steel
- Galvanized rust-proof surface
ConsiderLength may be too long
New Heavy Duty PTO Extender Adapter for Tractor PTO Shaft Extension, Univer…
Best forHigh horsepower tractors
- Handles up to 125 HP
- Galvanized corrosion resistance
ConsiderSpecific spline combo
New Upgraded Heavy Duty PTO Extender Adapter for Tractor PTO Shaft Extensio…
Best forQuick and safe connection
- Quick-release mechanism
- High-strength alloy steel
ConsiderRated for 75 HP
Tractor PTO Extender 1-3/8 inch 6 Spline Male to Female Adapter, 70 HP
Best forSimple 70 HP connection
- Heavy-duty steel construction
- Precise 6-spline fit
ConsiderNo extra features
PTO Heavy-Duty Adapter Clamp Type 1-3/4" 20 Spline Female 1-3/8" 21 Spline …
Best forClamp-style secure fit
- 2-bolt clamp design
- Extends shaft 5-3/16 inches
ConsiderSpecific spline sizes
New PTO Extender Adaptor Push-Pin Type with 1-Pack PTO Power Take Off Pin Y…
Best forPush-pin quick connect
- Push-pin design for quick connect
- High precision splines
Consider70 HP limit
Upgraded PTO Extender for Tractor 1-3/8" & 6 Spline Female, 1-3/8" & 6 Spli…
Best forBush Hog compatibility
- Compatible with Bush Hog
- Sturdy construction
ConsiderCheck part number first
T318 PTO Adapter Female/Male 6-Spline 1-1/8 x 1-3/8, 3-3/16" Length
Best forFerguson tractor fit
- Compact 3-3/16 inch length
- Increases shaft size
ConsiderLimited to Ferguson models
JYINCPED PTO Extender – Reliable 6-Spline Extension
Brand: JYINCPED
A dependable, well-built extender for standard 6-spline PTO shafts.
The JYINCPED PTO Extender is a solid choice for tractors up to 70 HP, featuring a female 1-3/8 inch and 6 spline on one end and a male 1-3/8 inch and 6 spline on the other. This design lets you quickly connect your PTO shaft and adjust the length without cutting or modifying anything, which is a huge plus for those who switch implements often.
Constructed from heavy-duty metal, this extender resists corrosion and wear, ensuring it holds up in demanding conditions. The precision 6-spline machining provides a secure fit that minimizes play, so you can trust it to transmit power smoothly. If you need a straightforward extension for your tractor, this one delivers dependable performance.
- Heavy-duty metal build
- Precision spline fit
- Easy length adjustment
- Limited to 70 HP
- Check fitment before order
GZZTORES PTO Extender – Sturdy and Corrosion-Resistant
Brand: GZZTORES
A sturdy, corrosion-resistant extender that installs easily and performs reliably.
The GZZTORES PTO Extender is another excellent option for tractors up to 70 HP, offering the same 1-3/8 inch 6-spline female to male configuration. Its metal construction is both durable and resistant to corrosion, making it suitable for outdoor use where moisture and dirt are common.
Installation is straightforward: turn off the tractor, remove the old extender, clean the connection points, and apply grease before mounting the new one. This simple process ensures a secure fit and reduces wear over time. For a reliable, no-fuss adapter that gets the job done, this model is worth considering.
- Corrosion-resistant metal
- Easy installation steps
- Stable power transmission
- Max 70 HP rating
- Basic design
Mkekexe Heavy Duty PTO Adapter – Spline Conversion
Brand: Mkekexe
A robust adapter for converting 1-3/4 to 1-3/8 splines with excellent durability.
The Mkekexe Heavy Duty PTO Adapter is a versatile option that converts a 1-3/4 inch 20-spline female connection to a 1-3/8 inch 6-spline male, extending your PTO by 7.5 inches. This is ideal for adapting newer implements to older tractors or vice versa, and it fits several universal machines and models.
Made from high-strength alloy steel that has been quenched for hardness, this adapter resists wear and deformation. The galvanized surface gives it a smooth, golden appearance that is rust-proof and corrosion-resistant, extending its service life. If you need a reliable spline conversion, this adapter is a top pick.
- High-strength alloy steel
- Galvanized rust-proof surface
- Universal fit
- Length may be too long
- Check spline compatibility
Mkekexe Universal PTO Adapter – 125 HP Capability
Brand: Mkekexe
A powerful adapter for high-HP applications with durable construction.
This Mkekexe adapter handles higher horsepower applications up to 125 HP, featuring a female 1-3/8 inch 21-spline and a male 1-3/4 inch 20-spline. It extends your PTO by 4-1/2 inches, with an overall length of 7-11/16 inches, making it suitable for a wide range of agricultural and industrial equipment.
Like other Mkekexe products, it is made from quenched high-strength alloy steel with a galvanized finish for corrosion resistance. The precision splines ensure a secure connection, reducing vibration and wear. If you need a heavy-duty adapter for larger implements, this one is built to last.
- Handles up to 125 HP
- Galvanized corrosion resistance
- Precision spline fit
- Specific spline combo
- Heavier weight
Mkekexe Quick Connect PTO Extender – 75 HP
Brand: Mkekexe
A safe, quick-connect extender that is easy to use and built to last.
The Mkekexe Quick Connect PTO Extender is designed for 540 RPM PTO shafts, with a 1-3/8 inch 6-spline female and male configuration. It features a quick-release mechanism and spring-loaded design that ensures reliable operation without sharp edges or protruding pins, enhancing safety during use.
This extender is made from high-strength alloy steel, quenched for hardness and wear resistance. The zinc coating adds extra protection against rust. It is suitable for tractors and various implements like rotary mowers and brush cutters, making it a versatile addition to your toolkit.
- Quick-release mechanism
- High-strength alloy steel
- Safety-focused design
- Rated for 75 HP
- Spring may wear over time
HNeekyr PTO Extender – Simple 6-Spline Adapter
Brand: HNeekyr
A straightforward, durable extender for standard 6-spline PTO shafts.
The HNeekyr PTO Extender offers a straightforward solution for tractors with 1-3/8 inch 6-spline PTO shafts, providing a secure male to female connection. It is engineered to handle up to 70 horsepower, making it suitable for most standard agricultural tasks.
Constructed from heavy-duty steel, this adapter is built for durability in demanding conditions. The precise 6-spline fitment ensures minimal play and smooth power transfer. If you need a no-nonsense extender that gets the job done without extra features, this is a reliable choice.
- Heavy-duty steel construction
- Precise 6-spline fit
- Handles 70 HP
- No extra features
- Basic design
All States Ag Parts PTO Adapter – Clamp Type
Brand: All States Ag Parts Parts A.S.A.P.
A reliable clamp-type adapter that provides a secure, vibration-free connection.
The All States Ag Parts PTO Adapter is a clamp-type adapter with a 1-3/4 inch 20-spline female end and a 1-3/8 inch 21-spline male end. It extends your PTO shaft by 5-3/16 inches, providing a secure connection for various implements.
The 2-bolt clamp design ensures a tight fit that minimizes vibration and slippage. This adapter is built to handle heavy-duty use, making it a dependable choice for agricultural applications. If you need a clamp-style adapter for spline conversion, this one is worth considering.
- 2-bolt clamp design
- Extends shaft 5-3/16 inches
- Heavy-duty construction
- Specific spline sizes
- May require tools for install
Mkekexe Push-Pin PTO Extender – Quick Connect
Brand: Mkekexe
A convenient push-pin extender that offers precise fit and easy installation.
The Mkekexe Push-Pin PTO Extender features a push-pin type connection with a female 1-3/8 inch 6-spline and a male 1-3/8 inch 21-spline. It extends your PTO by 4.125 inches, with an overall length of 6.375 inches, and is rated for 70 HP.
This adapter is made from high-strength alloy steel with a yellow galvanized finish for corrosion resistance. The rectangular spline design offers high precision and rigidity, ensuring accurate rotation and minimal wear. It comes with a 1-pack PTO pin yoke for quick connection, making it a convenient option.
- Push-pin design for quick connect
- High precision splines
- Includes PTO pin yoke
- 70 HP limit
- Yellow finish may fade
TERGTIRY PTO Extender – Compatible with Bush Hog
Brand: TERGTIRY
A versatile extender that fits popular implements and offers dependable performance.
The TERGTIRY PTO Extender is designed for tractors up to 70 HP, with a female and male 1-3/8 inch 6-spline configuration. It is compatible with popular implements like Bush Hog, Kubota, snow blowers, and finish mowers, making it a versatile addition to your equipment.
Made from high-quality materials, this extender is sturdy and built to outlast cheaper alternatives. Installation is simple: turn off the tractor, remove the old extender, apply grease, and install the new one. This ensures a secure fit and reduces wear. If you need a reliable extender for common implements, this one is a solid pick.
- Compatible with Bush Hog
- Sturdy construction
- Easy installation
- Check part number first
- 70 HP limit
Ohio Diesel Parts T318 Adapter – Compact Size
Brand: Ohio Diesel Parts
A precise, compact adapter for Ferguson tractors needing a shaft size increase.
The Ohio Diesel Parts T318 PTO Adapter is a compact option that increases shaft size from 1-1/8 inch to 1-3/8 inch, with a length of 3-3/16 inches. It is an aftermarket replacement that fits many Ferguson models, making it a specific solution for those tractors.
This adapter is built to meet or exceed original specifications, ensuring a proper fit and reliable performance. Its compact size is ideal for tight spaces where longer adapters might not fit. If you have a Ferguson tractor and need a size increase, this adapter is a great choice.
- Compact 3-3/16 inch length
- Increases shaft size
- Replaces T318 part
- Limited to Ferguson models
- Specific size increase
Buyer’s Guide: What to Consider
Choosing the right PTO adapter involves several key factors. This guide breaks down the essential considerations to help you make an informed decision that matches your tractor and implements.
- Spline Size Compatibility: Check the spline count and diameter on both your tractor's PTO shaft and your implement. Common sizes are 1-3/8 inch with 6 or 21 splines, and 1-3/4 inch with 20 splines. Using the wrong size can cause damage.
- Horsepower Rating: Ensure the adapter can handle your tractor's horsepower. Most adapters are rated for 70 HP, but some heavy-duty models support up to 125 HP. Overloading an adapter can lead to failure.
- Connection Type: Adapters come with different connection mechanisms, such as push-pin, clamp bolt, or quick-release. Choose one that matches your implement's connection style for a secure fit.
- Material and Build Quality: Look for adapters made from high-strength alloy steel or heavy-duty metal. Features like galvanization or quenching improve corrosion resistance and wear, extending the adapter's lifespan.
- Extension Length: Consider how much extra length you need. Adapters extend PTO shafts by varying amounts, from a few inches to over 7 inches. Measure your setup to ensure the adapter provides the right reach.
Conclusion
Selecting the best PTO adapter depends on your specific tractor model, implement requirements, and the tasks you perform. Whether you need a simple extension, a spline conversion, or a heavy-duty adapter for high horsepower, there is a product on this list to meet your needs.
For most standard applications, the JYINCPED or GZZTORES adapters offer reliable performance at an affordable price. If you need higher capacity, the Mkekexe 125 HP adapter is a top choice. Always verify your spline sizes and horsepower ratings before purchasing to ensure a perfect fit.
Erica Steven is the founder and lead writer of WorstBrands, a site dedicated to providing honest and trustworthy reviews about outdoor gear and fashion products.
With a passion for exploring the great outdoors and staying up to date on the latest fashion trends, Erica uses her expertise to provide valuable insights into the products that matter most to her readers.
Whether you're looking for camping equipment or the latest fashion accessories, Erica's articles are the perfect resource for finding the best products that fit your lifestyle.