{"id":3468,"date":"2026-07-08T05:13:51","date_gmt":"2026-07-08T05:13:51","guid":{"rendered":"https:\/\/rigid-shaft-coupling.top\/product\/ts7-25-setscrew-type-rigid-coupling-aluminum-alloy-25mm-od-precision-shaft-coupler\/"},"modified":"2026-07-08T05:14:00","modified_gmt":"2026-07-08T05:14:00","slug":"ts7-25-setscrew-type-rigid-coupling-aluminum-alloy-25mm-od-precision-shaft-coupler","status":"publish","type":"product","link":"https:\/\/rigid-shaft-coupling.top\/tr\/product\/ts7-25-setscrew-type-rigid-coupling-aluminum-alloy-25mm-od-precision-shaft-coupler\/","title":{"rendered":"TS7-25 Setscrew Type Rigid Coupling \u2013 Aluminum Alloy 25mm OD Precision Shaft Coupler"},"content":{"rendered":"
\n

TS7-25 Setscrew Rigid Coupling \u2013 25 mm OD Mid-Range Aluminum Alloy Precision Coupler<\/h1>\n

The TS7-25 setscrew type rigid coupling<\/strong> occupies the mid-range position in the TS7 aluminum alloy series, combining a 25 mm outer diameter body with a 1 N\u00b7m nominal torque rating and 14,000 rpm maximum speed. This model is the most frequently specified coupling in the TS7 family for standard servo motor to encoder or gearhead output shaft connections, where bore sizes of 8, 10, 11, and 12 mm cover the widest range of commercial servo motor shaft diameters. The step up from M3 to M4 setscrew threading at this frame size increases the available clamping torque \u2014 specified wrench torque is 1.7 N\u00b7m \u2014 improving reliability in sustained-torque or reversing-duty applications where the smaller frame setscrews might require more frequent re-tightening.<\/p>\n

The rotational inertia of the TS7-25 is 2.6 \u00d7 10\u207b\u2076 kg\u00b7m\u00b2, calculated at maximum shaft bore. While higher than the smaller frames, this figure remains well within the acceptable range for servo inertia ratio calculations in most standard motion axis designs. At 39 g, the coupling adds negligible mass to the drive train in typical servo-driven axis configurations.<\/p>\n

The TS7-25 is manufactured entirely in-house with bore tolerances matched to standard servo motor shaft h6 tolerances. For food processing, pharmaceutical, or corrosion-exposed installations, the dimensionally identical STS7-25<\/strong> in 316 stainless steel (100 g) is available. Both are listed in detail 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
Parameter<\/th>\nValue<\/th>\n<\/tr>\n<\/thead>\n
Model<\/td>\nTS7-25<\/td>\n<\/tr>\n
Body Material<\/td>\nAluminum Alloy<\/td>\n<\/tr>\n
Outer Diameter (D)<\/td>\n25 mm<\/td>\n<\/tr>\n
Overall Length (L)<\/td>\n36 mm<\/td>\n<\/tr>\n
Hub Length (L1)<\/td>\n9 mm<\/td>\n<\/tr>\n
Available Bore Sizes<\/td>\n8, 10, 11, 12 mm<\/td>\n<\/tr>\n
Setscrew Thread<\/td>\nM4<\/td>\n<\/tr>\n
Wrench Torque<\/td>\n1.7 N\u00b7m<\/td>\n<\/tr>\n
Rated Torque<\/td>\n1 N\u00b7m<\/td>\n<\/tr>\n
Maximum Torque<\/td>\n2 N\u00b7m<\/td>\n<\/tr>\n
Maximum Rotational Speed<\/td>\n14,000 rpm<\/td>\n<\/tr>\n
Moment of Inertia<\/td>\n2.6 \u00d7 10\u207b\u2076 kg\u00b7m\u00b2<\/td>\n<\/tr>\n
Mass<\/td>\n39 g<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n

Dimension Drawing<\/h2>\n

\"TS7-25<\/p>\n

Material and Build Detail<\/h2>\n

\"TS7-25<\/p>\n

The TS7-25 is machined from high-strength aluminum alloy bar stock. The increase to M4 setscrew threading at this frame size delivers a meaningful improvement in clamping reliability over M3 fasteners, allowing the coupling to sustain rated torque under continuous reversing duty without setscrew loosening. The 9 mm hub length per side provides adequate shaft engagement length for the 1 N\u00b7m torque level, balancing compactness against clamping effectiveness.<\/p>\n

Typical Applications<\/h2>\n
    \n
  • AC and DC servo motor to gearhead output shaft coupling<\/strong> \u2014 the 10\u201312 mm bore range matches the most common servo gearhead output diameters in this torque class<\/li>\n
  • Rotary encoder to shaft mounting<\/strong> \u2014 where the encoder’s 8 mm or 10 mm shaft requires a zero-backlash connection to the measured shaft<\/li>\n
  • Compact CNC axis drives<\/strong> \u2014 particularly Y-axis and A-axis connections on small VMC and turning centres<\/li>\n
  • Textile machinery position feedback drives<\/strong> \u2014 spindle and yarn feed encoder connections<\/li>\n
  • Semiconductor wafer handling axes<\/strong> \u2014 where cleanliness of the aluminum body suits cleanroom environments<\/li>\n<\/ul>\n

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

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

    Taiwan \u2014 CNC Machine Tool OEM<\/p>\n

    We specify the TS7-25 for encoder feedback connections on our servo-driven grinding machine axes. The zero-backlash requirement is absolute in our application \u2014 any play introduces position error that shows up directly as surface finish deviation on the workpiece. We have been using this model for three years without a single coupling-related service call.<\/p>\n

    \u2014 Senior Applications Engineer, Taichung<\/p>\n<\/div>\n

    \n

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

    Netherlands \u2014 Semiconductor Equipment Integrator<\/p>\n

    Specified for wafer handling stage drives in a cleanroom environment. The aluminum alloy body was preferred over steel for its outgassing profile and compatibility with cleanroom cleaning protocols. Dimensional accuracy was verified on arrival against our incoming QC template \u2014 all units passed without exception.<\/p>\n

    \u2014 Procurement Engineer, Eindhoven<\/p>\n<\/div>\n

    \n

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

    India \u2014 Textile Machinery Manufacturer<\/p>\n

    Used in spindle encoder coupling on our yarn winding machines. The TS7-25 handles the continuous-duty rotational loading without any performance degradation. We appreciate the mixed bore availability \u2014 our motor output is 10 mm and encoder shaft is 8 mm, which the TS7-25 accommodates directly.<\/p>\n

    \u2014 Mechanical Design Manager, Coimbatore<\/p>\n<\/div>\n<\/div>\n

    Frequently Asked Questions<\/h2>\n