●Z7 type expansion sleeve is a keyless coupling device between shaft and sleeve. This device can apply clamping force to the sleeve from the outside to form a mechanical compression fit between the shaft and sleeve, and transmit torque and expand The sleeve itself does not transmit any torque and load.
●When the expansion sleeve is fixed to the proper position of the shaft sleeve (hub), tighten the bolts according to the given torque, and the tapered inner ring exerts radial force on the shaft sleeve. This forced friction coupling can transmit large torque and load *
●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
■Marking 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 type-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
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basic size
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Socket head cap screws
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Rated load
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Screw
Tighten
Moment
MA
N · m
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Weight
kg
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d
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D
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dn
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l
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H
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e
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d1
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n
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Axial force F1
KN
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Torque
M1
KN·m
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mm
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140
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230
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95
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60
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74
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7
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M12 × 55
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12
|
436
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20.7
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100
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13
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100
|
480
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24.0
|
105
|
518
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27.2
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155
|
263
|
105
|
66
|
80
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M12 × 60
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15
|
545
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28.6
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20
|
110
|
591
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32.5
|
115
|
633
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36.4
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165
|
290
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115
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72
|
88
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8
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M16 × 65
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10
|
701
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40.3
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240
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26
|
120
|
758
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45.5
|
125
|
811
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50.7
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175
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300
|
125
|
832
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52
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29
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130
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880
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57.2
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135
|
924
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62.4
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185
|
330
|
135
|
92
|
112
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10
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M16 × 80
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15
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1037
|
70
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47
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140
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1100
|
77
|
145
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1159
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84
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200
|
350
|
145
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1291
|
93
|
50
|
150
|
1353
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101.5
|
155
|
1409
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109.2
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220
|
370
|
160
|
114
|
134
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M16 × 90
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20
|
1625
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130
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240
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65
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165
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1703
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140.5
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170
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1776
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151
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240
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405
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170
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120
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144
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12
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M20 × 100
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15
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1835
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156
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470
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87
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180
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1994
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179.5
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190
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2137
|
203
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260
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430
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190
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136
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160
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M20 × 110
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16
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2242
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213
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100
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200
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2390
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239
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210
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2542
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265
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280
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460
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210
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148
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172
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M20 × 110
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20
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2686
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282
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132
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220
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2900
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319
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230
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3087
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355
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300
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485
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230
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152
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176
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M20 × 120
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2965
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341
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140
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240
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3175
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381
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245
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3273
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401
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320
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520
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240
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160
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184
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M20 × 130
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24
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3317
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398
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165
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250
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3536
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442
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260
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3738
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486
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340
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570
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250
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176
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200
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M24 × 130
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20
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4080
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510
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820
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240
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260
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4307
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560
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270
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4519
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610
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360
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590
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280
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180
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204
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M24 × 140
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4707
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659
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250
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290
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4931
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715
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295
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5044
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744
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390
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660
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300
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188
|
212
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M24 × 140
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24
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5733
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860
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350
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310
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5903
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915
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320
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6063
|
970
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420
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690
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330
|
214
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238
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M24 × 150
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28
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6182
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1020
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410
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340
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6470
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1100
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350
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6743
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1180
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460
|
770
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360
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224
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252
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14
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M27 × 170
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24
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7222
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1300
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1210
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540
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370
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7514
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1390
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380
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7789
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1480
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500
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850
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400
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246
|
274
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M27 × 180
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30
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9400
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1880
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750
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410
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9659
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1980
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420
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9905
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2080
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Note: The mechanical performance grade of Z7C type expansion coupling set screws is 10.9.
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