Attributes

Brand	-
Category	Industrial Small Parts / Connectors and Fasteners
Origin	-
Material	Aluminum Alloy 6061
Surface Treatment	Black Anodized
Outer Diameter	19 mm
Total Length	25 mm
Motor Shaft Bore	5 mm
Lead Screw Bore	8 mm
Static Torque Capacity	5 N.m
Weight	35 grams
Set Screw Specification	M3 Hex Socket
Package Includes	1 x Rigid Coupling, 2 x Set Screws

5 reviews

Anonymous

Apr 17, 2026

Rating: 5/5

Exactly as described

Dimensions match the listing perfectly. Great rigid coupling for applications where flexibility is not needed.

Anonymous

Apr 02, 2026

Rating: 5/5

Solid build quality

Very sturdy aluminum construction. The anodizing looks nice and protects against corrosion. Highly recommend for DIY projects.

Anonymous

Mar 16, 2026

Rating: 4/5

Good value but tight fit

Works well for the price. The bore was slightly tight on my 8mm screw but smoothed out after installation. Good torque transmission.

Anonymous

Feb 14, 2026

Rating: 5/5

Perfect fit for my CNC router

This coupling fits perfectly between my NEMA 17 motor and the lead screw. The machining quality is excellent and there is no play.

Anonymous

Feb 08, 2026

Rating: 5/5

Easy to install

Installation was straightforward with the included set screws. No vibration issues since installing this on my engraver.

5 FAQ

Q: Are the set screws included in the package?

A: Yes, two M3 set screws are included with the coupling.

Q: Is this coupling flexible or rigid?

A: This is a rigid coupling designed for precise alignment without backlash.

Q: Can this handle high RPM speeds?

A: It is rated for typical CNC engraving speeds. Ensure shafts are well-aligned to prevent vibration at high RPM.

Q: What size hex key is needed for the set screws?

A: You will need a 2mm hex key to tighten the M3 set screws.

Q: Does this fit a NEMA 17 motor shaft?

A: Yes, the 5mm bore is standard for most NEMA 17 motor shafts.

Explore your interests

Japan BPJ Imported Deep Groove Ball Bearings 6006 6007 6008 6009 6010 6011 ZZ RS P4

$23.31

PNY8LMK10 12 13 16 20 25 30 35 40LUU50 Extended Square Flange Linear Bearing Imported

$37.00

45# Medium Carbon Steel Straight Guide Bushing: Inner Diameter D10-D50, Shoulderless Straight Liner, Bushing, Steel Sleeve

$1.00

Heavy-Duty Galvanized Double Round Clamps for Utility Poles, Street Light Poles, Iron/Steel Pipes, Cable Flat Bar Fasteners

$28.00

304 Stainless Steel Hex Socket Screw Cup Head Bolt Cylinder Head Extended M2 M2.5 M3 M4 M5 M6 M8 M10mm

$1.43

German Imported YLV 304 Stainless Steel Corrosion-Resistant Bearings S6800/6801/6802/6803/6804/6805

$5.80

PTFE (Teflon) Fully Threaded Studs, Double-Ended Internal/External Hex Screws, Nuts, Bolts, Washers, and Spring Washers

$4.50

T-Shaped Rubber Hexagonal Spider Coupling Elastic Block Polyurethane Buffer Pad Water Pump Shock Absorber Toughened Hex Pad

$5.00

Stainless Steel Bushings (Inner Dia: 2/2.5mm, Outer Dia: 4/5/6mm), Steel Guide Sleeves, Wear-Resistant Liners, Miniature Spacers

$2.00

Black 304 Stainless Steel Hex Nut, Flat Washer, and Spring Washer Kit M3-M10

$2.70

[M2-M20] Stainless Steel Spring Washer

$0.76

Aluminum Alloy Spider Coupling Star Leadscrew Encoder High Torque Ball Screw Servo Motor Coupling

$1.62

Sunroom Column Base Steel Casting Embedded Parts 80 100 120 150 Special Square Tube Base Connector

$6.03

Black 304 Stainless Steel Smooth Cup Head Socket Screw, Unknurled Cylinder Bolt M2 M3 M4 M5 M6 M8

$3.50

Imported Extended Square Flange Linear Bearing Electroplated Rust-Resistant LMK8 10 16 20 25 30 35 40LUU

$12.20

Linear Shaft Guide Box-Type Slider Linear Bearing Steel Retainer Bronze Bushing SC8 12 13 16 22 53 35 45 0UU

$3.80

Guide Shaft Support Open-Type Flange Bearing Housing STHWRB Smooth Shaft Fixed Support GBJ Series Shaft Support

$11.00

Hardened Bearing Steel Bushing, Wear-Resistant Liner, High-Precision Guide Sleeve, Collar, and Spacer Set

$3.69

Imported Bearing Model Assortment: 6000RS, 6001 High-Speed, 6002 Motor, 6003, 6004, 6005, 6006

$2.50

25mm Round Stainless Steel Pipe Connector, Clothes Drying Rack Accessory, Display Stand Fastener, Shelf Fixing Two-Way Joint

$1.20

Miniature Ball Bearings with Shoulder Flange Catalog - Inner Diameters 2 3 4 5 6 7 8 9 10

$13.00

L-Type Jaw Coupling, Spider Coupling, High Torque, Black Oxide Finish, Free Shipping from Manufacturer

$7.00

MYT Meiyate Square Flange Linear Bearing LMK6 8 10 12 13 16 20AUU/LAUU Nickel-Plated Rust-Proof

$13.80

Extended Box-Type Slider Bearing Linear Rail SCS8 10 12 13 16 20 25 35 40 5060LUU

$6.80

304 Stainless Steel Countersunk Hex Socket Screw and Nut Set with Flat and Spring Washers

$1.29

National Standard Brass Hex Socket Screw, Nut, Bolt, and Washer Assortment Set

$8.80

304 Stainless Steel Locking Washer for Round Nuts, Six-Claw Retaining Plate, Black Iron GB858

$11.00

C&U Bearings for Automotive Alternators - SA608, 6201, 6202, 6302, 6303, 6304/2RSM/C3

$3.50

Plastic Hammer Head Nut M8 M10 Furniture Connector Embedded Fastener Hardware Accessories

$5.11

Multi-Spec Large Lubricated Copper Shaft Bushings - Centrifugal Cast Oil-Free Sleeves and Blank Bushings

$94.90

304 Stainless Steel Rivet Nuts, Aluminum Flat Head Rivnuts, Countersunk Rivet Nuts Assortment M3 M4 M5 M6 M8 M10

$0.91

Stainless Steel Angle Bracket 90-Degree L-Shaped Fixator Corner Iron Right-Angle Triangle Support Shelf Bracket Hardware Connector Plate T

$2.66

Assorted Screws and Nuts Kit M6 M8 M10 M12, Hex Head Screw, Nut, and Washer Combination Set

$5.69

Galvanized High-Strength Imperial Hex Flange Nuts UNC Grade 8, Anti-Slip Locking; UNF Fine Thread Nuts

$2.20

M3-M20 PVC External Hex Head Screws, Gray Insulated Bolts, Acid and Alkali Resistant Plastic Fasteners

$2.64

NSK High-Speed Imported Micro Bearings 605 606 607 608 609 ZZ Z1 Z2 Z3 Z4

$3.00

Aluminum Alloy Shaft Bushing, Washer, Tube Sleeve, Spacer Column, Casing, Flat Gasket, Retaining Ring, Aluminum Joint Sleeve M2 M3 M4 M5 M8-m12

$9.00

M18 M20 M22 M24 M27 M30 Grade 8.8 Extended Hex Head Bolt, Nut, Washer, and Stud Set

$4.32

Injection Molding Machine Parts ~ Large Pin Shaft ~ All Sizes Available ~ Steel Sleeve Matching ~ Bushing ~ Pin Shafts for All Models

$70.00

Guwanji Zinc-Plated Iron Cross Countersunk Screw, Nut, Flat Head Bolt, and Spring Washer Assortment M2-M12

$1.82