Z11 Expansion Sleeve for Ultra High Torque Transmission with High Dynamic Load Capacity High Rigidity and Strong Stability-Jiangsu Rokang Heavy Industry Technology Co., Ltd.

Specification

Size（mm）	Dimensions (mm)			Rated load		Contact pressure (MPa)		Locking screw	Weight (Approx. kg)
Size（mm）	L1	L2	D1	Axial (kN)	Torque (N·m)	Shaft (MPa)	Hub (MPa)	Tightening (N·m)	Weight (Approx. kg)
6×14×21	10	24	25	4	12	185	80	2	0.05
7×15×25	12	29	27	7	24	223	105	5	0.06
8×15×25	12	29	27	7	29	207	111	5	0.07
9×16×26	14	30	28	10	42	197	110	5	0.07
10×16×26	14	30	28	10	48	179	112	5	0.07
11×18×26	14	30	32	10	51	165	102	5	0.07
12×18×26	14	30	32	10	55	152	100	5	0.08
13×23×26	14	30	38	10	64	143	82	5	0.11
14×23×26	14	30	38	10	68	130	80	5	0.11
15×24×36	16	42	45	18	133	194	121	17	0.22
16×24×36	16	42	45	18	140	180	118	17	0.22
17×26×38	18	44	47	22	180	190	125	17	0.25
18×26×38	18	44	47	22	200	180	125	17	0.23
19×27×38	18	44	49	22	210	172	121	17	0.25
20×28×38	18	44	50	22	220	160	115	17	0.26
22×32×45	25	51	54	22	250	113	78	17	0.36
24×34×45	25	51	56	22	270	106	76	17	0.35
25×34×45	25	51	56	22	280	101	76	17	0.34
28×39×45	25	51	61	32	450	130	93	17	0.42
30×41×45	25	51	62	32	500	133	95	17	0.43
32×43×45	25	51	65	35	540	115	86	17	0.49
35×47×52	32	58	69	44	800	106	81	17	0.55
38×50×52	32	58	72	45	900	105	79	17	0.62
40×53×52	32	58	75	45	900	92	68	17	0.64

Size（mm）	Dimensions (mm)			Rated load		Contact pressure (MPa)		Locking screw	Weight (Approx. kg)
Size（mm）	L1	L2	D1	Axial (kN)	Torque (N·m)	Shaft (MPa)	Hub (MPa)	Tightening (N·m)	Weight (Approx. kg)
42×55×52	32	58	78	47	1000	90	81	17	0.85
45×59×70	45	78	86	80	1950	105	78	41	1.05
48×62×70	45	78	87	81	1800	102	78	41	1.13
50×65×70	45	78	92	81	2020	96	72	41	1.26
55×71×80	55	88	98	95	2730	89	68	41	1.53
60×74×80	55	88	104	98	2870	76	61	41	1.66
65×87×80	55	88	111	99	3190	73	57	41	1.9
70×90×96	65	106	119	147	5150	82	69	83	3
75×95×96	65	106	126	153	5710	88	66	83	3.1
80×100×96	65	106	131	196	8260	103	77	83	3.3
85×106×96	65	106	137	204	8670	97	82	83	3.6
90×112×96	65	106	144	206	8800	88	74	83	4
95×120×96	65	106	149	237	11300	103	82	83	4.7
100×125×96	65	106	154	285	14300	114	90	83	5.2
110×140×128	90	140	180	293	16600	83	68	145	8.7
120×155×128	90	140	198	302	17700	71	56	145	10.6
130×165×128	90	140	208	380	24800	89	69	145	11.3

Describe

The Z11 Expansion Sleeve is a high-performance mechanical locking device engineered for ultra-high torque transmission applications. Designed to meet demanding requirements in heavy-duty and dynamically loaded machinery, the Z11 model ensures a secure, backlash-free connection between shafts and hubs without the need for keyways or splines. It delivers outstanding performance where precision, reliability, and mechanical strength are critical.

Working Principle
The Z11 expansion sleeve operates based on the principle of frictional locking. When axial clamping bolts are tightened, the inner and outer tapered surfaces of the sleeve generate a radial pressure that creates a powerful frictional bond between the shaft and the mounted component. This bond transmits torque and axial forces with exceptional efficiency and stability. Unlike traditional keyed connections, the Z11 sleeve distributes load uniformly, reducing localized stress concentrations and ensuring a longer service life.

Structure and Composition
The Z11 expansion sleeve is typically composed of the following key elements:
Inner and Outer Cones: Precisely machined tapered components that facilitate uniform radial expansion.
Clamping Bolts: High-strength fasteners that induce axial force, creating the frictional grip.
High-Grade Alloy Steel: The sleeve is manufactured from premium-grade steel, treated with advanced surface hardening and anti-corrosion finishes for superior durability and wear resistance.
Optional OEM customization is available to meet specific dimensional or performance needs.

Key Features and Advantages
Ultra High Torque Transmission: Capable of transmitting significantly higher torque compared to conventional couplings or keyed assemblies.
High Dynamic Load Capacity: Optimized for machinery subjected to frequent start-stop cycles, load variations, and shock inputs.
Exceptional Rigidity: The sleeve’s robust structure minimizes micro-movement, ensuring precise alignment and vibration-free operation.
Strong Operational Stability: Offers outstanding resistance to loosening under dynamic or reversed loading conditions.
Backlash-Free Design: Ensures exact torque transfer with no play, ideal for precision-driven systems.
Easy Installation and Disassembly: Can be installed or removed without damaging the shaft or hub, promoting serviceability and reducing downtime.
OEM Support: Flexible customization options are available for diameter, length, bolt configuration, and surface treatment.

Applications
The Z11 Expansion Sleeve is widely used in industries that demand precision power transmission and high mechanical reliability, including:
Heavy Machinery and Equipment
Wind Turbines and Energy Generation Systems
Steel and Metal Processing Machines
Paper and Pulp Industry Equipment
Marine Propulsion Systems
Large Conveyors and Industrial Drives
Machine Tools and Automation Systems