Description
TS7Z110×160 Locking Assembly – 110mm Shaft 160mm OD Keyless Rigid Shaft-Hub Connector
The largest model in the TS7Z series, the TS7Z110×160 delivers 7.2 kN·m rated torque and 180 kN axial force capacity for 110 mm shaft connections at the heaviest end of the locking assembly range. At 10.4 kg mass and M_a = 145 N·m, installation requires a calibrated torque multiplier. Applications include large mine hoists, primary mill drives, and major industrial compressors where shaft size and power level define the design. 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 TS7Z110×160 at the specified M_a of 145 N·m — generates a friction connection that transmits both torque (Mt = 7.2 kN·m) and axial force (Ft = 180 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 | TS7Z110×160 |
| Type | Locking Assembly (Keyless Shaft-Hub Connection) |
| Shaft Bore (d) | 110 mm |
| Outer Diameter (D) | 160 mm |
| Rated Axial Force (Ft) | 180 kN |
| Rated Torque (Mt) | 7.2 kN·m |
| Surface Pressure (Ps) | 65 MPa |
| Installation Screw Torque (Ma) | 145 N·m |
| Mass (G) | 10.4 kg |
| Material | Steel |
| Standard | GB/T 5106 compatible |
Dimensional Reference
Structural Cross-Section
Installation and Design Guidance
Installation of the TS7Z110×160 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
★★★★★
Egypt — Industrial Gearbox OEM
We use the TS7Z110×160 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 — simplifying customer installation.
— Senior Engineer, Cairo
★★★★★
Germany — Wind Turbine Manufacturing
We specified the TS7Z110×160 for main drive shaft connections on our 72 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
★★★★☆
Brazil — Steel Rolling Mill
Fitted the TS7Z110×160 on hot strip mill coiler mandrel drive connections. Temperature in this area reaches 60°C; the locking assembly’s static friction connection is unaffected by thermal cycling where a keyed connection would develop fretting wear over time. The 65 MPa contact pressure distributes the load evenly around the shaft circumference.
— Engineering Manager, São Paulo
Frequently Asked Questions
Can a locking assembly be reused after disassembly?
Yes. TS7Z locking assemblies can be disassembled and reused, provided the shaft and hub bore surfaces are inspected and show no scoring, corrosion, or fretting damage. Clean and lubricate the tapered contact surfaces before reassembly and retighten to the specified M_a torque.
What is the Ps (surface pressure) parameter and how is it used?
Ps is the radial contact pressure between the inner ring and the shaft surface at the specified installation torque. It is used to verify that the shaft material’s yield strength is not exceeded. The design rule is: Ps must be less than 0.9 × yield strength of the shaft material. For mild steel shafts (yield ~250 MPa), Ps must be below 225 MPa.
Is the TS7Z available in stainless steel?
The standard TS7Z locking assembly is manufactured in steel with a standard surface treatment for industrial environments. For corrosion-resistant requirements, contact Ever Power to discuss material alternatives or protective coating options for your specific application.
What is the hub bore tolerance recommended for the TS7Z outer ring?
A hub bore tolerance of H7 is the standard recommendation. This provides a sliding clearance fit for the outer ring during installation, allowing the ring to be inserted and the clamping screws tightened without axial force. A tighter tolerance (H6) may be used if the hub bore machining permits, but should be confirmed against the specific TS7Z model’s outer diameter tolerance.
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.
Source the TS7Z110×160 Locking Assembly
Ever Power manufactures the TS7Z110×160 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.