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The 8 Best set screw couplings of 2025

Are you trying to find set screw couplings among various brands on the market but aren’t sure where to begin? To assist you in finding the right one, we’ve put together a list of the 7 best to help you pick the perfect one!

We investigated and evaluated a number of the top-selling set screw couplings on the market in order to create our list of the best. Making a decision among the many options available is never simple. There are an infinite number of models available, each with a distinct price. And as you’ll find out, the best options aren’t usually the ones you imagine! This comparison is rich and relevant because of the numerous factors that were employed. You will find products featured in this ranking not only based on their pricing but also on their features and other customers reviews. To write this review, we completed 20 hours of research and did 31 set screw couplings tests. You won’t need to pick products at random any more. If you’re unsure of what to look for, browse our list and consult the buying guide!

An overview of our top picks

Table of contents

The best set screw couplings you can buy today

SaleNo. 1
Climax Metals RC-037 Black Oxide Plated Mild Steel Rigid Coupling, 3/8" Bore, 3/4" Outside Diameter, 1" Length, 1/4"-20 x 3/16" Set Screw
  • Provides torque transmision and alignment
  • Cost effective coupling design
  • Easily installed where major disassembly would otherwise be required
  • Tolerance: +.0005/+.0025
  • Black oxide provides some corrosion resistance
SaleNo. 2
Hubbell-Raco 2023B5 Coupling, Set-Screw, 3/4-Inch Trade Size, EMT, Steel, Uninsulated, 5-Pack,Gray
  • All steel construction insures mechanical protection for the raceway
  • Tri-head screws (1/2-Inch to 2-Inch trade sizes) may be installed using a slotted, Phillips, or Robertson head screwdriver
  • 2-1/2-Inch to 4-Inch trade sizes are also UL listed for use on Rigid/IMC conduit, allowing for design and installation flexibility
  • All components are zinc electroplated for corrosion protection
  • Fittings are individually polybagged with a preprinted UPC-A bar code and packaged in pre-scored tear top cartons for an attractive presentation
No. 3
Climax Metals RC-025-A Aluminum Rigid Coupling, 1/4" Bore, 1/2" Outside Diameter, 3/4" Length, #10-32 x 1/8" Set Screw
  • Provides torque transmision and alignment
  • Cost effective coupling design
  • Easily installed where major disassembly would otherwise be required
  • Tolerance: +.0005/+.0025
  • Aluminum is lightweight and corrosion resistant
No. 4
Climax Metals RC-050-4H@90 Black Oxide Plated Mild Steel Rigid Coupling, 1/2" Bore, 1" Outside Diameter, 1-1/2" Length, 1/4"-20 x 1/4" Set Screw
  • Provides torque transmision and alignment
  • Cost effective coupling design
  • Easily installed where major disassembly would otherwise be required
  • 4 set screws increase load capacity
  • Black oxide provides some corrosion resistance
No. 5
Morris Products 14872 EMT Set Screw Coupling, Zinc Die Cast, 1" Trade Size (Pack of 20)
  • EMT Set Screw Couplings - Zinc Die Cast - EMT Set Screw Couplings are Used To Secure EMT Conduit to EMT Conduit.
  • Use to connect EMT Conduit to EMT Conduit
  • Concrete Tight (When Taped)
  • Pre-Set/Pre-Staked Combo Head Set-Screws
  • Die Cast Zinc
No. 6
uxcell 4mm to 4mm Bore Rigid Coupling Set Screw L25XD14 Aluminum Alloy,Shaft Coupler Connector,Motor Accessories,Blue
  • Connection Diameter: 4mm to 4mm, Total Length: 25mm /0.98 inch, Outside Diameter : 14mm/ 0.55 inch
  • Widely used in blowers,3D printer,DIY robots,CNC machine,stepper motors,etc. Similar to rigid clamp couplings, shaft couplers are used to hold bearings and sprockets tightly on the shaft, and are used in motor and gearbox assemblies.
  • Top tight type rigid coupling with 2/4 screws to hold the shaft tightly; high torque with rigidity, low inertia and excellent sensitivity.
  • NOTE: The rigid type basically does not allow eccentricity, and it must be fully adjusted during use.
  • Single piece set screw clamp design makes it easy to set up the items on the shaft and control the holding capacity of the coupling.
No. 7
uxcell 5mm to 5mm Bore Rigid Coupling Set Screw L22XD14 Stainless Steel,Shaft Coupler Connector for RC Airplane Boat, Motor Accessories
  • Connection Diameter: 5mm to 5mm, Total Length: 22mm /0.87 inch, Outside Diameter : 14mm/ 0.55 inch
  • Widely used in blowers,3D printer,DIY robots,CNC machine,stepper motors,etc. Similar to rigid clamp couplings, shaft couplers are used to hold bearings and sprockets tightly on the shaft, and are used in motor and gearbox assemblies.
  • Top tight type rigid coupling with 2/4 screws to hold the shaft tightly; high torque with rigidity, low inertia and excellent sensitivity.
  • NOTE: The rigid type basically does not allow eccentricity, and it must be fully adjusted during use.
  • Single piece set screw clamp design makes it easy to set up the items on the shaft and control the holding capacity of the coupling.
No. 8
uxcell 1/4 Inch to 1/4 Inch Bore Rigid Coupling Set Screw L25XD14 Aluminum Alloy,Shaft Coupler Connector for 3D Printers, Motor Accessories,Dark Blue,2pcs
  • Connection Bore Diameter: 1/4 inch to 1/4 inch; Total Length: 25mm /0.98 inch, Outside Diameter : 14mm/ 0.55 inch; with M4 Screws
  • Widely used in blowers,3D printer,DIY robots,CNC machine,stepper motors,etc. Similar to rigid clamp couplings, shaft couplers are used to hold bearings and sprockets tightly on the shaft, and are used in motor and gearbox assemblies.
  • Top tight type rigid coupling with 2/4 screws to hold the shaft tightly; high torque with rigidity, low inertia and excellent sensitivity.
  • NOTE: The rigid type basically does not allow eccentricity, and it must be fully adjusted during use.
  • Single piece set screw clamp design makes it easy to set up the items on the shaft and control the holding capacity of the coupling.
No. 9
Sigma Electric, Gray, Sigma Engineered Solutions ProConnex TC-511 EMT Set Screw Coupling 1/2-Inch Conduit Fitting, 50-Pack, 50 Count, No Size
  • Connects two lengths of 1/2-in EMT conduit
  • Set screw type with tri-combo screws
  • Concrete-tight when taped and for dry location applications
  • Zinc die-cast construction
  • Product is UL and CSA listed
No. 10
uxcell 1/4 inch to 1/4 inch Bore Rigid Coupling Set Screw L25XD14 Aluminum Alloy,Shaft Coupler Connector for 3D Printers, Motor Accessories,Blue
  • Connection Diameter: 1/4 inch to 1/4 inch, Total Length: 25mm /0.98 inch, Outside Diameter : 14mm/ 0.55 inch
  • Widely used in blowers,3D printer,DIY robots,CNC machine,stepper motors,etc. Similar to rigid clamp couplings, shaft couplers are used to hold bearings and sprockets tightly on the shaft, and are used in motor and gearbox assemblies.
  • Top tight type rigid coupling with 2/4 screws to hold the shaft tightly; high torque with rigidity, low inertia and excellent sensitivity.
  • NOTE: The rigid type basically does not allow eccentricity, and it must be fully adjusted during use.
  • Single piece set screw clamp design makes it easy to set up the items on the shaft and control the holding capacity of the coupling.
SaleNo. 11
uxcell 8mm to 8mm Bore Rigid Coupling Set Screw L22XD14 Stainless Steel,Shaft Coupler Connector for 3D Printers, Motor Accessories,2pcs
  • Connection Diameter: 8mm to 8mm, Total Length: 22mm /0.87 inch, Outside Diameter : 14mm/ 0.55 inch
  • Widely used in blowers,3D printer,DIY robots,CNC machine,stepper motors,etc. Similar to rigid clamp couplings, shaft couplers are used to hold bearings and sprockets tightly on the shaft, and are used in motor and gearbox assemblies.
  • Top tight type rigid coupling with 2/4 screws to hold the shaft tightly; high torque with rigidity, low inertia and excellent sensitivity.
  • NOTE: The rigid type basically does not allow eccentricity, and it must be fully adjusted during use.
  • Single piece set screw clamp design makes it easy to set up the items on the shaft and control the holding capacity of the coupling.
SaleNo. 12
uxcell 3mm to 4mm Bore Rigid Coupling Set Screw L26XD10 Aluminum Alloy,Shaft Coupler Connector,Motor Accessories
  • Connection Diameter: 4mm to 3mm, Total Length: 26mm /1.02 inch, Outside Diameter : 10mm/ 0.39 inch
  • Widely used in blowers,3D printer,DIY robots,CNC machine,stepper motors,etc. Similar to rigid clamp couplings, shaft couplers are used to hold bearings and sprockets tightly on the shaft, and are used in motor and gearbox assemblies.
  • Top tight type rigid coupling with 2/4 screws to hold the shaft tightly; high torque with rigidity, low inertia and excellent sensitivity.
  • NOTE: The rigid type basically does not allow eccentricity, and it must be fully adjusted during use.
  • Single piece set screw clamp design makes it easy to set up the items on the shaft and control the holding capacity of the coupling.
No. 13
Morris Products 14900 EMT Set Screw Coupling, Steel, 1/2" Trade Size (Pack of 50)
  • EMT Set Screw Couplings - Steel - EMT Set Screw Couplings are Used To Secure EMT Conduit to EMT Conduit.
  • Use to connect EMT Conduit to EMT Conduit
  • Concrete Tight (When Taped)
  • Pre-Set/Pre-Staked Combo Head Set-Screws
  • Heavy Steel Walls
SaleNo. 14
uxcell 1/8 Inch to 1/8 Inch Bore Rigid Coupling Set Screw L20XD10 Aluminum Alloy,Shaft Coupler Connector,Motor Accessories,Light Blue,4pcs
  • Connection Bore Diameter: 1/8 inch to 1/8 inch; Total Length: 20mm /0.79 inch, Outside Diameter : 10mm/ 0.39 inch; with M3 Screws
  • Widely used in blowers,3D printer,DIY robots,CNC machine,stepper motors,etc. Similar to rigid clamp couplings, shaft couplers are used to hold bearings and sprockets tightly on the shaft, and are used in motor and gearbox assemblies.
  • Top tight type rigid coupling with 2/4 screws to hold the shaft tightly; high torque with rigidity, low inertia and excellent sensitivity.
  • NOTE: The rigid type basically does not allow eccentricity, and it must be fully adjusted during use.
  • Single piece set screw clamp design makes it easy to set up the items on the shaft and control the holding capacity of the coupling.
No. 15
Sigma Electric ProConnex 55245M EMT Set Screw Coupling 2-Inch, 1-Pack
  • Connects two lengths of 2-in EMT conduit
  • Double set screw type with tri-combo screws
  • Concrete-tight when taped and for dry location applications
  • Zinc die-cast construction
  • Product is UL and CSA listed
No. 16
uxcell 10mm to 10mm Bore Rigid Coupling Set Screw L22XD16 45# Steel,Shaft Coupler Connector for 3D Printers, Motor Accessories
  • Connection Diameter: 10mm to 10mm, Total Length: 22mm /0.87 inch, Outside Diameter : 16mm/ 0.63 inch
  • Widely used in blowers,3D printer,DIY robots,CNC machine,stepper motors,etc. Similar to rigid clamp couplings, shaft couplers are used to hold bearings and sprockets tightly on the shaft, and are used in motor and gearbox assemblies.
  • Top tight type rigid coupling with 2/4 screws to hold the shaft tightly; high torque with rigidity, low inertia and excellent sensitivity.
  • NOTE: The rigid type basically does not allow eccentricity, and it must be fully adjusted during use.
  • Single piece set screw clamp design makes it easy to set up the items on the shaft and control the holding capacity of the coupling.
No. 17
uxcell 1/4 Inch to 1/4 Inch Bore Rigid Coupling Set Screw L25XD20 Aluminum Alloy,Shaft Coupler Connector for 3D Printers, Motor Accessories,4pcs
  • Connection Bore Diameter: 1/4 inch to 1/4 inch; Total Length: 25mm/0.98 inch, Outside Diameter: 20mm/0.78 inch; with M4 Screws
  • Widely used in blowers,3D printer,DIY robots,CNC machine,stepper motors,etc. Similar to rigid clamp couplings, shaft couplers are used to hold bearings and sprockets tightly on the shaft, and are used in motor and gearbox assemblies.
  • Top tight type rigid coupling with 2/4 screws to hold the shaft tightly; high torque with rigidity, low inertia and excellent sensitivity.
  • NOTE: The rigid type basically does not allow eccentricity, and it must be fully adjusted during use.
  • Single piece set screw clamp design makes it easy to set up the items on the shaft and control the holding capacity of the coupling.
SaleNo. 18
Climax Metals RC-031 Black Oxide Plated Mild Steel Rigid Coupling, 5/16" Bore, 5/8" Outside Diameter, 1" Length, #10-32 x 1/8" Set Screw
  • Provides torque transmision and alignment
  • Cost effective coupling design
  • Easily installed where major disassembly would otherwise be required
  • Tolerance: +.0005/+.0025
  • Black oxide provides some corrosion resistance
No. 19
uxcell 8mm to 8mm Bore Rigid Coupling Set Screw L22XD14 45# steel,Shaft Coupler Connector for 3D Printers, Motor Accessories
  • Connection Diameter: 8mm to 8mm, Total Length: 22mm /0.87 inch, Outside Diameter : 14mm/ 0.55 inch
  • Widely used in blowers,3D printer,DIY robots,CNC machine,stepper motors,etc. Similar to rigid clamp couplings, shaft couplers are used to hold bearings and sprockets tightly on the shaft, and are used in motor and gearbox assemblies.
  • Top tight type rigid coupling with 2/4 screws to hold the shaft tightly; high torque with rigidity, low inertia and excellent sensitivity.
  • NOTE: The rigid type basically does not allow eccentricity, and it must be fully adjusted during use.
  • Single piece set screw clamp design makes it easy to set up the items on the shaft and control the holding capacity of the coupling.
SaleNo. 20
Climax Metals Part RC-050 Mild Steel, Black Oxide Plating Rigid Coupling, 1/2 inch bore, 1 inch OD, 1 1/2 inch Length, 1/4-20 x 1/4 Set Screw
  • Provides torque transmision and alignment
  • Cost effective coupling design
  • Easily installed where major disassembly would otherwise be required
  • Tolerance: +.0005/+.0025
  • Black oxide provides some corrosion resistance

How to choose a good set screw couplings

Does the idea of finding a fantastic set screw couplings make you anxious? When it comes to purchasing this product, specifically when deciding which model to select, has your head been spinning between options? You are not alone if that is the case. We are aware of the pressure involved in the purchasing process!

Your presence here indicates that you are interested in set screw couplings. Before choosing which product would be the best for your needs after being inundated with information, locate a reliable source with genuine selections. You can get that information from a variety of sources, including buying guides and rating websites, word-of-mouth recommendations from friends and family, online discussion forums where users can share their own experiences, product reviews that can be found all over the internet, and YouTube channels. You can only get the right product through exhaustive analysis. But you realize that’s not always simple. In order to ease your concerns, we have taken the time to develop a list of the top set screw couplings products available right now. You might be wondering how we came up with the list. How was this buying guide developed?

First, we used our algorithms to gather as much reliable data as we could about these products. To verify all the data gathered, we used both artificial intelligence and a lot of algorithms.
Then, our experts used criteria that are recognized in the business to evaluate them according to their quality to price ratio, allowing us to choose the top set screw couplings on the market right now!

The selection of the goods is not arbitrary. Before creating a list, we take into account a number of factors. Below are some of the criteria discussed:

Brand Value: What happens if you choose a dubious brand just because it appears to be a good deal? So the likelihood of receiving a product with a short shelf life increases. That is due to the fact that well-known brands have a reputation to uphold, while others do not. Top set screw couplings brands strive to provide some distinctive traits that set them apart from the competition. So, hopefully one or more of the items on our list will be perfect for you.

Features: Useful features are all you need, not tons of them. We consider the important aspects and select the top set screw couplings based on those.

Specifications: Numbers always help you measure the quality of a product in a quantitative way. We try to find products with higher specifications, but with the right balance.

Quality: A product’s quality may always be quantified with the aid of numbers. We look for goods with better standards that strike the proper balance. The best quality product that gets highly appreciated and recommended by experienced users.

Customer ratings:  Would it be accurate to suggest that the set screw couplings were used by hundreds of customers before you? Superior ratings indicate that many customers had better service.

Customer Reviews: Like ratings,  provide you with accurate and reliable information about the product from genuine customers. Customer ratings are very important to all of us because they contain accurate and reliable information about the customer service we received from several hundred customers.

Seller Rank: This is very intriguing! Not only do you need a good set screw couplings, you also need a product with rising sales that is trendy. It accomplishes two goals. First, the expanding user base proves the quality of the product. Second, given that number, producers must be able to offer greater quality and after-sales support.

Value: You get what you pay for, they say, so consider the value. Cheap isn’t always good and expensive isn’t always bad. However, that does not imply that spending a lot of money on a product that is flashy but underwhelming is a good idea. Before adding them to the list, we make an effort to evaluate how much value you can get for your money from your set screw couplings.

Durability: Durability and reliability are closely related concepts. You will benefit from a strong and long-lasting set screw couplings for months and years to come.

Product availability: Products come and go, and new ones replace the old ones. Most likely, a few new features and required changes were made. What use is it to use a supposedly good product if the maker no longer supports it? We make an effort to highlight products that are current and offered by one or more trustworthy sellers, if not more.

Negative Reviews: Yes, we do take that into account as well! The goods with the majority of bad reviews are filtered out and disregarded when we choose the best-rated one on the market.

These are the standards by which we selected our set screw couplings. Do we end our process there? Hell no. The most crucial fact about us that you should be aware of is that we regularly update our website with current and pertinent information. We have one more layer of filtration since we place the greatest importance on reader satisfaction. Please let us know if any product included here is incorrect, irrelevant, subpar, or simply out of date. We always value your opinions, and we’ll work hard to make any necessary corrections to our list in response to them.

Why should you believe us?

There are now thousands of possibilities for these products on Amazon, but choosing the best one can be difficult and time-consuming. And what set screw couplings should you purchase in 2022?

This guide is the result of more than 10 years of experience in researching, testing and writing about many topics. Each member of our team is an authority in their area. We read every article we could find online and every consumer review on every retail website for seven hours. Additionally, we discovered a ton of websites that offered helpful resources, including buying tips and thorough information on set screw couplings.