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Z7B type expansion joint sleeve

Detailed parameters of Z7B type expansion coupling sleeve

The Z7B expansion coupling sleeve is a keyless coupling device between the shaft and the sleeve. This device can apply a clamping force to the sleeve from the outside to form a mechanical compression fit between the shaft and the sleeve and transmit torque. The expansion sleeve itself does not transmit any torque and load.
When the expansion sleeve is fixed to the proper position of the sleeve (hub), tighten the bolts according to the given torque, and the tapered inner ring applies radial force to the sleeve. This forced friction coupling can safely transmit large torque and loads
When the expansion sleeve is clamped, each mating surface has a high pressure and is completely sealed, which avoids the corrosion of the mating surface.When disassembling, loosen the bolts, the mating surface will automatically relax, and the sleeve and cone ring will automatically return to the original size
This device is easy to disassemble and assemble, suitable for transmitting torque at medium and low speeds
Markup example
内径d=140mm，外径D=230mm的Z7B型胀紧联结套：胀套Z7B-140×230 JB/T7934-1999
Z7 type expansion sleeve is divided into three series
Z7A-Light Series Double Cone Locking Disc Type
Z7B type—standard type series double cone locking disc type, preferred series
Z7C type—heavy series double cone locking disc type

The basic dimensions and parameters of the Z7B expansion sleeve:

Basic size (mm)					Socket head cap screws		Rated load		Tightening torque MA (NM)	Weight kg	e mm
d	D	dn	l	H	d1	n	Axial force FtKN	Torque Mt KN.M
140	230	95	46	58	M12× 45	10	317	15.1	100	10	7
		100					352	17.6
		105					382	20.1
155	263	105	50	62	M12× 50	12	419	22		15
		110					454	25
		115					487	28
165	290	115	56	68	M16× 55	8	539	31	240	22
		120					583	35
		125					624	39
175	300	125					640	40
		130					677	44
		135					711	48
185	330	135	71	85	M16× 65	10	815	55		37	8
		140					857	60
		145					896	65
195	350	140				12	928	65		41
		150					1013	76
		155					1052	81.5
200	350	150					1040	78
		155					1084	84
		160					1125	90
220	370	160	88	103	M16× 75	15	1250	100	470	54	10
		165					1309	108
		170					1365	116
240	405	170	92	107	M20× 80	12	1412	120		67
		180					1533	138
		190					1642	156
260	430	190	103	119	M20× 85		1726	164		82
		200					1840	184
		210					1943	204
280	460	210	114	132	M20× 95	15	2062	217		102	12
		220					2227	245
		230					2374	273
300	485	230	122	140	M20× 100	16	2278	262		118
		240					2442	293
		245					2514	308
320	520	240				18	2550	306		131
		250					2720	340
		260					2877	374
340	570	250	134	155	M20× 110	24	3152	394		186
		260					3308	430
		270					3452	466
350	590	270	140	159			3393	458		204
		280					3572	500
		285					3656	521
360	590	280					3622	507
		290					3793	550
		295					3878	572
380	645	290	144	163	M24× 120	18	4069	590	820	820
		300					4267	640
		310					4452	690
390	660	300				20	4400	660
		310					4580	710
		320					4750	760
Note: The mechanical performance grade of Z7B expansion set screws is 12.9.