Description
TS7Z100×150 Locking Assembly – 100mm Shaft 150mm OD Keyless Rigid Shaft-Hub Connector
At 100 mm bore and 150 mm outer diameter, the TS7Z100×150 enters the very large industrial drive segment with 5.53 kN·m rated torque, 144 kN axial capacity, and a M_a of 145 N·m — confirming the heavy-duty fastener size. Applications include cement mill main drive connections, large compressor shaft-hub interfaces, and primary mine hoisting machinery. 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 — 65 MPa for the TS7Z100×150 at the specified M_a of 145 N·m — generates a friction connection that transmits both torque (Mt = 5.53 kN·m) and axial force (Ft = 144 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 | TS7Z100×150 |
| Type | Locking Assembly (Keyless Shaft-Hub Connection) |
| Shaft Bore (d) | 100 mm |
| Outer Diameter (D) | 150 mm |
| Rated Axial Force (Ft) | 144 kN |
| Rated Torque (Mt) | 5.53 kN·m |
| Surface Pressure (Ps) | 65 MPa |
| Installation Screw Torque (Ma) | 145 N·m |
| Mass (G) | 7.8 kg |
| Material | Steel |
| Standard | GB/T 5106 compatible |
Dimensional Reference
Structural Cross-Section
Installation and Design Guidance
Installation of the TS7Z100×150 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 = 145 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 (65 MPa) ≤ 0.9 × shaft yield strength. For C45 steel (yield ~370 MPa): 0.9 × 370 = 333 MPa > 65 MPa — acceptable. For aluminium alloy 6061-T6 (yield ~275 MPa): 0.9 × 275 = 247 MPa; compare with 65 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
★★★★★
Finland — Wood Processing Equipment
The TS7Z100×150 is installed on chipper disc drive shaft connections at our wood processing facility. The locking assembly handles the high-energy shock loads from disc chipping operations without slip. The 7.8 kg mass is manageable by our two-person maintenance team without lifting equipment.
— Senior Engineer, Tampere
★★★★★
Belgium — Industrial Fan Manufacturing
Used in industrial fan impeller hub connections in our power station forced-draft fan installations. The TS7Z100×150’s even radial preload distribution minimises hub distortion under the fan’s rotor dynamic loading, which is important for maintaining the dynamic balance quality of the assembled fan rotor.
— Technical Manager, Ghent
★★★★☆
Indonesia — Metallurgical Equipment
Installed on billet rolling mill drive connections. The TS7Z100×150 handles the peak torque during cobble-clearing operations — a significant shock load above normal rolling torque — without slip. The locking assembly’s frictional connection distributes this shock load evenly rather than transmitting it through a key contact point.
— Applications Specialist, Jakarta
Frequently Asked Questions
What is the operating principle of a locking assembly?
A locking assembly — also called a keyless shaft-hub connection or friction locking device — uses axial bolt preload to expand a split inner ring against the shaft surface and simultaneously contract a tapered outer ring against the hub bore. This generates a uniform radial clamping pressure that transmits torque through friction, eliminating the need for a keyway or interference fit.
What happens if the TS7Z is over-tightened beyond M_a?
Over-tightening beyond the specified M_a torque can over-stress the tapered rings, cause plastic deformation of the shaft surface, and make disassembly difficult. Always use a calibrated torque wrench or torque driver for installation. If screws cannot reach M_a due to ring contact, check that the correct bore size has been specified.
How does the TS7Z locking assembly compare to a keyed connection?
A locking assembly distributes torque and axial force uniformly around the shaft circumference through friction, eliminating the stress concentration of a keyway. This typically allows the same torque to be transmitted through a smaller shaft diameter, or significantly extends fatigue life at the same shaft size. Locking assemblies also allow precise angular positioning, which is not possible with a keyed connection unless the keyway is machined to a specific angular reference.
What is the maximum shaft diameter for the TS7Z series?
The TS7Z series covers shaft bore diameters from 15 mm (TS7Z15×45) to 110 mm (TS7Z110×160). If a shaft diameter outside this range is required, contact Ever Power to discuss alternative locking assembly series that may cover your requirement.
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.
Source the TS7Z100×150 Locking Assembly
Ever Power manufactures the TS7Z100×150 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.