{"id":3493,"date":"2026-07-08T05:15:54","date_gmt":"2026-07-08T05:15:54","guid":{"rendered":"https:\/\/rigid-shaft-coupling.top\/product\/ts7z28x60-locking-assembly-rigid-coupling-28mm-shaft-60mm-od-keyless-hub-connection\/"},"modified":"2026-07-08T05:15:55","modified_gmt":"2026-07-08T05:15:55","slug":"ts7z28x60-locking-assembly-rigid-coupling-28mm-shaft-60mm-od-keyless-hub-connection","status":"publish","type":"product","link":"https:\/\/rigid-shaft-coupling.top\/id\/product\/ts7z28x60-locking-assembly-rigid-coupling-28mm-shaft-60mm-od-keyless-hub-connection\/","title":{"rendered":"TS7Z28\u00d760 Locking Assembly Rigid Coupling \u2013 28mm Shaft 60mm OD Keyless Hub Connection"},"content":{"rendered":"
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TS7Z28\u00d760 Locking Assembly \u2013 28mm Shaft 60mm OD Keyless Rigid Shaft-Hub Connector<\/h1>\n

The TS7Z28\u00d760<\/strong> serves 28 mm shaft applications including IEC frame 132 motors at higher power ratings. The 60 mm outer diameter provides sufficient ring wall section for reliable clamping at the 87 MPa surface pressure. This model is commonly used in conveyor drive heads, fan impeller hubs, and gearbox input shaft connections in the 3\u20137.5 kW motor power range. For a complete listing of all TS7Z locking assembly models, visit our product catalog<\/a>.<\/p>\n

The TS7Z locking assembly operates on the principle of tapered ring compression: two tapered steel rings \u2014 inner and outer \u2014 are drawn together axially by the clamping screws. The taper geometry converts axial screw preload into a radial clamping force, expanding the inner ring against the shaft surface and contracting the outer ring against the hub bore simultaneously. The resulting surface pressure \u2014 87 MPa for the TS7Z28\u00d760 at the specified M_a of 17 N\u00b7m \u2014 generates a friction connection that transmits both torque (Mt = 0.327 kN\u00b7m) and axial force (Ft = 25.2 kN) without any mechanical interlock element. No keyway is required in either the shaft or the hub bore.<\/p>\n

The elimination of the keyway is the principal engineering advantage of the TS7Z over traditional keyed hub connections. A keyway introduces a stress concentration at its corners that can initiate fatigue cracks under the cyclic torsion loading of a rotating drive \u2014 particularly at high surface hardness or in applications with frequent torque reversals. The TS7Z distributes torque loading uniformly around the full circumference of the shaft bore, eliminating this stress riser and significantly extending the fatigue life of the connected shafts. For high-cycle, high-torque drives \u2014 mills, fans, compressors, and crushers \u2014 this durability improvement is a primary selection rationale.<\/p>\n

Technical Specifications<\/h2>\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>\nTS7Z28\u00d760<\/td>\n<\/tr>\n
Type<\/td>\nLocking Assembly (Keyless Shaft-Hub Connection)<\/td>\n<\/tr>\n
Shaft Bore (d)<\/td>\n28 mm<\/td>\n<\/tr>\n
Outer Diameter (D)<\/td>\n60 mm<\/td>\n<\/tr>\n
Rated Axial Force (Ft)<\/td>\n25.2 kN<\/td>\n<\/tr>\n
Rated Torque (Mt)<\/td>\n0.327 kN\u00b7m<\/td>\n<\/tr>\n
Surface Pressure (Ps)<\/td>\n87 MPa<\/td>\n<\/tr>\n
Installation Screw Torque (Ma)<\/td>\n17 N\u00b7m<\/td>\n<\/tr>\n
Mass (G)<\/td>\n0.91 kg<\/td>\n<\/tr>\n
Material<\/td>\nSteel<\/td>\n<\/tr>\n
Standard<\/td>\nGB\/T 5106 compatible<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n

Dimensional Reference<\/h2>\n

\"TS7Z28\u00d760<\/p>\n

Structural Cross-Section<\/h2>\n

\"TS7Z28\u00d760<\/p>\n

Installation and Design Guidance<\/h2>\n

\"TS7Z28\u00d760<\/p>\n

Installation of the TS7Z28\u00d760 requires the shaft surface to be clean, dry, and within an h6 or k6 shaft tolerance, with a surface finish of Ra 0.8\u20131.6 \u03bcm. The hub bore should be machined to H7 tolerance. Clamping screw threads and head bearing faces must be lubricated with MoS\u2082 paste before installation to ensure the M_a = 17 N\u00b7m tightening torque produces the correct clamping force. Tighten all screws in a star pattern in at least three progressive passes \u2014 do not fully tighten one screw before the others.<\/p>\n

To verify shaft material suitability, check: Ps (87 MPa) \u2264 0.9 \u00d7 shaft yield strength. For C45 steel (yield ~370 MPa): 0.9 \u00d7 370 = 333 MPa > 87 MPa \u2014 acceptable. For aluminium alloy 6061-T6 (yield ~275 MPa): 0.9 \u00d7 275 = 247 MPa; compare with 87 MPa for this model. If the shaft material yield strength is insufficient, contact our contact our team<\/a> for a re-rated configuration.<\/p>\n

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Keyless Design<\/h3>\n

No keyway in shaft or hub. Eliminates keyway stress concentration and fretting wear. Angular position can be set freely \u2014 no keyway angular constraint.<\/p>\n<\/div>\n

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Self-Releasing Disassembly<\/h3>\n

Back off clamping screws in a star pattern \u2014 the taper geometry produces a self-releasing action requiring no extraction tools or heat. Shaft and hub surfaces are undamaged after removal.<\/p>\n<\/div>\n

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Uniform Load Distribution<\/h3>\n

Torque is transmitted through friction uniformly around the full shaft circumference, distributing stress evenly and enabling the same torque to be carried at lower peak shaft stress than a keyed connection.<\/p>\n<\/div>\n

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Bidirectional Torque<\/h3>\n

Frictional connection transmits equal torque in both rotational directions. No directional constraint \u2014 suitable for reversing drive applications without additional design consideration.<\/p>\n<\/div>\n<\/div>\n

Customer Reviews and Case Studies<\/h2>\n
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\u2605\u2605\u2605\u2605\u2605<\/p>\n

Vietnam \u2014 Pulp & Paper Industry<\/p>\n

Used in Yankee dryer drive connections in our tissue paper machine. The TS7Z28\u00d760’s keyless connection eliminates the fretting fatigue issue we experienced with keyed connections under the high sustained torque and vibration loading of the Yankee drive.<\/p>\n

\u2014 Project Manager, Ho Chi Minh City<\/p>\n<\/div>\n

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

United Arab Emirates \u2014 Thermal Power Station<\/p>\n

Installed on steam turbine auxiliary drive shaft connections at our 3 MW coal-fired power station. The locking assembly’s zero-keyway design was selected based on our shaft fatigue analysis \u2014 eliminating the keyway stress concentration extended the calculated fatigue life from 80,000 to over 200,000 operating hours.<\/p>\n

\u2014 Technical Manager, Dubai<\/p>\n<\/div>\n

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

Egypt \u2014 Industrial Gearbox OEM<\/p>\n

We use the TS7Z28\u00d760 for output shaft connections on our range of industrial helical and bevel-helical gearboxes. The locking assembly is offered as a standard shaft termination option because it allows the gearbox to be mounted on a plain shaft without machining a keyway \u2014 simplifying customer installation.<\/p>\n

\u2014 Senior Engineer, Cairo<\/p>\n<\/div>\n<\/div>\n

Frequently Asked Questions<\/h2>\n