Description
TS7Z30×60 Locking Assembly – 30mm Shaft 60mm OD Keyless Rigid Shaft-Hub Connector
At 30 mm bore with a shared 60 mm outer diameter with the TS7Z28×60, the TS7Z30×60 covers IEC frame 160 motor shaft ends and gearbox output connections in the medium industrial drive class. The 0.352 kN·m rated torque at 81 MPa surface pressure provides a robust connection for sustained-duty conveyor, pump, and mixer applications. For a complete listing of all TS7Z locking assembly models, visit our product catalog.
The TS7Z locking assembly operates on the principle of tapered ring compression: two tapered steel rings — inner and outer — 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 — 81 MPa for the TS7Z30×60 at the specified M_a of 17 N·m — generates a friction connection that transmits both torque (Mt = 0.352 kN·m) and axial force (Ft = 25.2 kN) without any mechanical interlock element. No keyway is required in either the shaft or the hub bore.
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 — 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 — mills, fans, compressors, and crushers — this durability improvement is a primary selection rationale.
Technical Specifications
| Parameter | Value |
|---|---|
| Model | TS7Z30×60 |
| Type | Locking Assembly (Keyless Shaft-Hub Connection) |
| Shaft Bore (d) | 30 mm |
| Outer Diameter (D) | 60 mm |
| Rated Axial Force (Ft) | 25.2 kN |
| Rated Torque (Mt) | 0.352 kN·m |
| Surface Pressure (Ps) | 81 MPa |
| Installation Screw Torque (Ma) | 17 N·m |
| Mass (G) | 0.81 kg |
| Material | Steel |
| Standard | GB/T 5106 compatible |
Dimensional Reference
Structural Cross-Section
Installation and Design Guidance
Installation of the TS7Z30×60 requires the shaft surface to be clean, dry, and within an h6 or k6 shaft tolerance, with a surface finish of Ra 0.8–1.6 μm. The hub bore should be machined to H7 tolerance. Clamping screw threads and head bearing faces must be lubricated with MoS₂ paste before installation to ensure the M_a = 17 N·m tightening torque produces the correct clamping force. Tighten all screws in a star pattern in at least three progressive passes — do not fully tighten one screw before the others.
To verify shaft material suitability, check: Ps (81 MPa) ≤ 0.9 × shaft yield strength. For C45 steel (yield ~370 MPa): 0.9 × 370 = 333 MPa > 81 MPa — acceptable. For aluminium alloy 6061-T6 (yield ~275 MPa): 0.9 × 275 = 247 MPa; compare with 81 MPa for this model. If the shaft material yield strength is insufficient, contact our contact our team for a re-rated configuration.
Keyless Design
No keyway in shaft or hub. Eliminates keyway stress concentration and fretting wear. Angular position can be set freely — no keyway angular constraint.
Self-Releasing Disassembly
Back off clamping screws in a star pattern — the taper geometry produces a self-releasing action requiring no extraction tools or heat. Shaft and hub surfaces are undamaged after removal.
Uniform Load Distribution
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.
Bidirectional Torque
Frictional connection transmits equal torque in both rotational directions. No directional constraint — suitable for reversing drive applications without additional design consideration.
Customer Reviews and Case Studies
★★★★★
Nigeria — Concrete Mixing Equipment
The TS7Z30×60 is installed in concrete mixer drum drive connections on our truck-mounted transit mixers. The locking assembly handles the variable torque loading of drum rotation during mixing and discharge cycles without slip. Removal at drum maintenance intervals is straightforward with the torque-wrench release procedure.
— Technical Buyer, Lagos
★★★★★
Germany — Wind Turbine Manufacturing
We specified the TS7Z30×60 for main drive shaft connections on our 3 MW wind turbine gearbox housings. The locking assembly design allows precise torque setting during installation and the published Ft and Mt values aligned exactly with our shaft end-force calculations. We have installed over 60 units across three turbine models with no field failures.
— Senior Engineer, Düsseldorf
★★★★☆
United Kingdom — Paper Mill Equipment
We use the TS7Z30×60 in our paper machine dryer section drive connections. The locking assembly provided a repeatable, calibrated installation that eliminated the variability we saw with previous keyway connections. The 0.352 kN·m torque capacity provides a comfortable safety margin over our peak drive torque.
— Technical Buyer, Birmingham
Frequently Asked Questions
Can the TS7Z accommodate shaft misalignment?
No. The TS7Z is a rigid locking assembly and does not accommodate angular, parallel, or axial misalignment. Shaft and hub bore must be accurately aligned before installation. Any misalignment will be transmitted as a bending moment to the shaft and hub, reducing fatigue life.
What clamping screw type is used in the TS7Z?
The TS7Z uses socket head cap screws (hexagon socket, DIN 912 equivalent) of appropriate size for each frame. A hex key of the correct size must be used for installation and removal. The screw size varies by TS7Z model — refer to the product drawing or contact Ever Power for the specific screw specification for your model.
Can the TS7Z be used with hollow shafts?
Yes, provided the hollow shaft wall thickness is sufficient to withstand the Ps radial contact pressure without collapse. For hollow shaft applications, calculate the wall stress using the thick-walled cylinder formula with the inner pressure equal to Ps and the relevant wall geometry. Contact Ever Power if you require assistance with the hollow shaft calculation.
What is the difference between the TS7Z inner ring and outer ring?
The inner ring contacts the shaft bore directly and expands radially outward when the clamping screws are tightened. The outer ring contacts the hub bore and contracts radially inward. The tapered interface between the two rings converts axial screw preload into radial clamping force on both surfaces simultaneously.
What surface treatment is applied to the TS7Z?
The standard TS7Z locking assembly components are manufactured from steel with a phosphate or similar surface treatment that provides moderate corrosion protection during storage and in dry industrial environments. For outdoor or wet environments, additional protection such as periodic light oiling of external surfaces is recommended.
Source the TS7Z30×60 Locking Assembly
Ever Power manufactures the TS7Z30×60 and the complete TS7Z locking assembly series — 31 bore sizes from 15 mm to 110 mm — direct from our factory. Provide your shaft diameter, hub bore, application torque, and quantity for a prompt technical review and factory-direct pricing.