{"id":3501,"date":"2026-07-08T05:16:20","date_gmt":"2026-07-08T05:16:20","guid":{"rendered":"https:\/\/rigid-shaft-coupling.top\/product\/ts7z48x90-locking-assembly-rigid-coupling-48mm-shaft-90mm-od-keyless-hub-connection\/"},"modified":"2026-07-08T05:16:28","modified_gmt":"2026-07-08T05:16:28","slug":"ts7z48x90-locking-assembly-rigid-coupling-48mm-shaft-90mm-od-keyless-hub-connection","status":"publish","type":"product","link":"https:\/\/rigid-shaft-coupling.top\/sv\/product\/ts7z48x90-locking-assembly-rigid-coupling-48mm-shaft-90mm-od-keyless-hub-connection\/","title":{"rendered":"TS7Z48\u00d790 Locking Assembly Rigid Coupling \u2013 48mm Shaft 90mm OD Keyless Hub Connection"},"content":{"rendered":"
\n

TS7Z48\u00d790 Locking Assembly \u2013 48mm Shaft 90mm OD Keyless Rigid Shaft-Hub Connector<\/h1>\n

At 48 mm bore and 90 mm outer diameter, the TS7Z48\u00d790<\/strong> addresses large IEC motor shaft ends and custom gearbox connections in the heavy industrial drive segment. The 1.053 kN\u00b7m rated torque and 69 MPa surface pressure provide a robust, traceable shaft connection for sustained high-torque duty in cement, mining, and paper industry drives. 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 69 MPa for the TS7Z48\u00d790 at the specified M_a of 42 N\u00b7m \u2014 generates a friction connection that transmits both torque (Mt = 1.053 kN\u00b7m) and axial force (Ft = 46.8 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>\nTS7Z48\u00d790<\/td>\n<\/tr>\n
Type<\/td>\nLocking Assembly (Keyless Shaft-Hub Connection)<\/td>\n<\/tr>\n
Shaft Bore (d)<\/td>\n48 mm<\/td>\n<\/tr>\n
Outer Diameter (D)<\/td>\n90 mm<\/td>\n<\/tr>\n
Rated Axial Force (Ft)<\/td>\n46.8 kN<\/td>\n<\/tr>\n
Rated Torque (Mt)<\/td>\n1.053 kN\u00b7m<\/td>\n<\/tr>\n
Surface Pressure (Ps)<\/td>\n69 MPa<\/td>\n<\/tr>\n
Installation Screw Torque (Ma)<\/td>\n42 N\u00b7m<\/td>\n<\/tr>\n
Mass (G)<\/td>\n2.3 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

\"TS7Z48\u00d790<\/p>\n

Structural Cross-Section<\/h2>\n

\"TS7Z48\u00d790<\/p>\n

Installation and Design Guidance<\/h2>\n

\"TS7Z48\u00d790<\/p>\n

Installation of the TS7Z48\u00d790 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 = 42 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 (69 MPa) \u2264 0.9 \u00d7 shaft yield strength. For C45 steel (yield ~370 MPa): 0.9 \u00d7 370 = 333 MPa > 69 MPa \u2014 acceptable. For aluminium alloy 6061-T6 (yield ~275 MPa): 0.9 \u00d7 275 = 247 MPa; compare with 69 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

\n
\n

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

\n

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

\n

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

\n

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
\n
\n

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

Portugal \u2014 Railway Maintenance Equipment<\/p>\n

Installed on wheel set drive connections on our track geometry measurement vehicles. The TS7Z48\u00d790 provides a precisely reproducible connection that can be disassembled and reassembled to the same torque standard at each wheelset overhaul. The published preload torque of 42 N\u00b7m is the key parameter for our maintenance procedure.<\/p>\n

\u2014 Design Engineer, Porto<\/p>\n<\/div>\n

\n

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

Argentina \u2014 Pump & Compressor OEM<\/p>\n

Installed on compressor crankshaft to flywheel connections on our reciprocating gas compressors. The locking assembly’s keyless connection distributes torque through friction over the full bore surface rather than concentrating load at a key, which our fatigue analysis showed extended shaft service life by an estimated 40% under our operating cycle.<\/p>\n

\u2014 Engineering Manager, Buenos Aires<\/p>\n<\/div>\n

\n

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

Indonesia \u2014 Metallurgical Equipment<\/p>\n

Installed on billet rolling mill drive connections. The TS7Z48\u00d790 handles the peak torque during cobble-clearing operations \u2014 a significant shock load above normal rolling torque \u2014 without slip. The locking assembly’s frictional connection distributes this shock load evenly rather than transmitting it through a key contact point.<\/p>\n

\u2014 Applications Specialist, Jakarta<\/p>\n<\/div>\n<\/div>\n

Frequently Asked Questions<\/h2>\n