{"id":3467,"date":"2026-07-08T05:13:51","date_gmt":"2026-07-08T05:13:51","guid":{"rendered":"https:\/\/rigid-shaft-coupling.top\/product\/ts7-20-setscrew-type-rigid-coupling-aluminum-alloy-precision-shaft-connector-20mm-od\/"},"modified":"2026-07-08T05:13:56","modified_gmt":"2026-07-08T05:13:56","slug":"ts7-20-setscrew-type-rigid-coupling-aluminum-alloy-precision-shaft-connector-20mm-od","status":"publish","type":"product","link":"https:\/\/rigid-shaft-coupling.top\/vi\/product\/ts7-20-setscrew-type-rigid-coupling-aluminum-alloy-precision-shaft-connector-20mm-od\/","title":{"rendered":"TS7-20 Setscrew Type Rigid Coupling \u2013 Aluminum Alloy Precision Shaft Connector 20mm OD"},"content":{"rendered":"
\n

TS7-20 Setscrew Rigid Coupling \u2013 20 mm OD Aluminum Alloy Miniature Precision Connector<\/h1>\n

Stepping up from the TS7-16 in physical size while retaining the core attributes of the TS7 setscrew series, the TS7-20 rigid coupling<\/strong> provides a 20 mm outer diameter precision shaft connector rated to 0.5 N\u00b7m nominal torque and 18,000 rpm maximum rotational speed. It bridges the gap between the smallest 16 mm frame and the mid-range 25 mm frame, offering a bore range of 5, 6, 8, and 10 mm that covers the most common stepper motor, BLDC motor, and instrumentation shaft diameters in the 0.5\u20131 N\u00b7m torque class.<\/p>\n

Like all models in the TS7 setscrew series, the TS7-20 employs M3 grub screws \u2014 one per shaft hub \u2014 to lock the coupling body onto each shaft end without requiring a split clamp or external fastener band. This keeps the exterior profile clean and smooth, important where surrounding components or safety guarding require minimal protrusion. The all-aluminum construction at 20 g total mass maintains the series’ characteristic of low added inertia, with the TS7-20 contributing 8.5 \u00d7 10\u207b\u2077 kg\u00b7m\u00b2 to the drive system \u2014 approximately 2.7 times that of the TS7-16 but still negligible for most servo amplifier inertia ratio calculations.<\/p>\n

The TS7-20 is used across stepper-driven 3D printer axes, compact rotary actuators, small-format CNC router Z-axes, and laboratory automation pipetting drives. For corrosion-resistant installations, the equivalent STS7-20<\/strong> in 316 stainless steel provides the same geometric and torque specifications at 54 g mass. Both variants are listed on our product catalog<\/a>.<\/p>\n

Technical Specifications<\/h2>\n
\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
Parameter<\/th>\nValue<\/th>\n<\/tr>\n<\/thead>\n
Model<\/td>\nTS7-20<\/td>\n<\/tr>\n
Series<\/td>\nTS7 Setscrew Type Rigid Coupling<\/td>\n<\/tr>\n
Body Material<\/td>\nAluminum Alloy<\/td>\n<\/tr>\n
Outer Diameter (D)<\/td>\n20 mm<\/td>\n<\/tr>\n
Overall Length (L)<\/td>\n30 mm<\/td>\n<\/tr>\n
Hub Length (L1)<\/td>\n7 mm<\/td>\n<\/tr>\n
Available Bore Sizes<\/td>\n5, 6, 8, 10 mm<\/td>\n<\/tr>\n
Setscrew Thread<\/td>\nM3<\/td>\n<\/tr>\n
Wrench Torque<\/td>\n0.7 N\u00b7m<\/td>\n<\/tr>\n
Rated Torque<\/td>\n0.5 N\u00b7m<\/td>\n<\/tr>\n
Maximum Torque<\/td>\n1 N\u00b7m<\/td>\n<\/tr>\n
Maximum Rotational Speed<\/td>\n18,000 rpm<\/td>\n<\/tr>\n
Moment of Inertia<\/td>\n8.5 \u00d7 10\u207b\u2077 kg\u00b7m\u00b2<\/td>\n<\/tr>\n
Mass<\/td>\n20 g<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n

Dimensions<\/h2>\n

\"TS7-20<\/p>\n

Construction and Performance Characteristics<\/h2>\n

\"TS7-20<\/p>\n

The TS7-20 body is machined from high-strength aluminum alloy rod stock, providing dimensional consistency across production batches. The bore machining tolerance ensures a controlled fit on standard h6 or j6 motor output shaft tolerances, with the setscrew clamping force supplementing the bore fit to achieve the rated torque transmission without slip. The 30 mm overall length provides sufficient hub length (7 mm per side) to resist cantilever bending loads from minor axial misalignment during installation, while keeping the axial envelope compact.<\/p>\n

At 18,000 rpm maximum speed, the TS7-20 is suitable for most servo and stepper motor applications operating at rated speed. The aluminum alloy construction imposes no centrifugal stress concerns at this speed for the OD sizes involved. Dynamic balance is inherent in the symmetric machined geometry \u2014 no additional balance correction is required for standard applications.<\/p>\n

Application Sectors<\/h2>\n
    \n
  • 3D printing and additive manufacturing<\/strong> \u2014 Z-axis and extruder drive couplings for stepper motor to leadscrew connections<\/li>\n
  • Small CNC routers and engravers<\/strong> \u2014 spindle motor encoder feedback coupling and axis drive connections<\/li>\n
  • Benchtop robotic arms<\/strong> \u2014 joint drive couplings in 4-axis and 6-axis desktop manipulators<\/li>\n
  • Automated pipetting and liquid handling systems<\/strong> \u2014 precision dispensing axis drives in laboratory automation<\/li>\n
  • Optical inspection systems<\/strong> \u2014 camera positioning and focus drive couplings<\/li>\n
  • Conveyor indexing drives<\/strong> \u2014 compact servo-driven indexing for packaging line feed mechanisms<\/li>\n<\/ul>\n

    Customer Reviews and Case Studies<\/h2>\n
    \n
    \n

    \u2605\u2605\u2605\u2605\u2605<\/p>\n

    United States \u2014 3D Printer OEM<\/p>\n

    We use the TS7-20 on Z-axis leadscrew drives across our production line of FDM printers. The consistency between units is excellent \u2014 we have not had a single instance of shaft slip or coupling failure across several thousand units deployed over 18 months. The 5 mm to 8 mm bore combination aligns perfectly with our motor and leadscrew shaft sizes.<\/p>\n

    \u2014 Mechanical Engineering Lead, Boston<\/p>\n<\/div>\n

    \n

    \u2605\u2605\u2605\u2605\u2605<\/p>\n

    South Korea \u2014 Robotics Integrator<\/p>\n

    Specified for joint drive connections on a collaborative robot arm prototype. The low mass was the decisive factor \u2014 every gram saved at the joint reduces payload capacity loss at the end effector. The TS7-20 at 20 g outperformed competing couplings by a significant margin. Technical data matched published specs on arrival inspection.<\/p>\n

    \u2014 Project Engineer, Seoul<\/p>\n<\/div>\n

    \n

    \u2605\u2605\u2605\u2605\u2606<\/p>\n

    Australia \u2014 Laboratory Automation<\/p>\n

    Used in automated liquid handling platform drives. The TS7-20 handles the repetitive start-stop duty cycle of our pipetting axis without any evidence of fretting or setscrew loosening after six months of daily operation. Pre-sales support from Ever Power helped us confirm the correct bore pair before placing the order.<\/p>\n

    \u2014 Systems Engineer, Melbourne<\/p>\n<\/div>\n<\/div>\n

    Frequently Asked Questions<\/h2>\n