TACL disc coupling
Disc coupling: by definition, transmits torque from a driving to a driven bolt tangentially on a common bolt circle.
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- Description
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Disc coupling: by definition, transmits torque from a driving to a driven bolt tangentially on a common bolt circle. Torque is transmitted between the bolts through a series of thin, stainless steel discs assembled in a pack. Misalignment is accomplished by deforming of the material between the bolts.
A disc coupling is a high performance motion control (Servo) coupling designed to be the torque transmitting element (by connecting two shafts together) while accommodating for shaft misalignment. It is designed to be flexible, while remaining torsionally strong under high torque loads. Typically, disc couplings can handle speeds up to 10,000 RPM.
There are two different styles of disc coupling:
Single Disc Style couplings are composed of two hubs (the ends of the coupling, which are typically made from aluminum, but stainless steel is used as well) and a single, flat, stainless steel disc spring
Double Disc Style coupling is also composed of two hubs, but has an additional center spacer sandwiching two disc springs. The center spacer can be made out of the same material as the hubs, but is sometimes available in insulating acetal, which makes the coupling electrically isolating.
The difference between the two styles is that single disc couplings cannot accommodate parallel misalignment due to the complex bending that would be required of the lone disc. Double disc styles allow the two discs to bend in opposite directions to better manage parallel offset. The discs are fastened to the hubs (and center spacer on double disc styles) with tight fitting pins that do not allow any play or backlash between the disc and the hubs. The discs can be bent easily and as a result, disc couplings have some of the lowest bearing loads available in a motion control coupling.
Torsionally stiff and still flexible, disc couplings are a great solution for high speed applications. The downside is that they are more delicate than the average coupling and can be damaged if misused. Special care should be taken to ensure that misalignment is within the ratings of the coupling.
Advantages of disc coupling
1. Eliminates the need for lubrication and coupling maintenance
2. Coupling can be inspected without disassembly
3. Condition of disc packs can be inspected with a strobe light while the machine is running
4. Note: It is not recommended that couplings be operated without coupling guards.
5. Easy to assess equipment misalignment
6. Torsionally rigid without any backlash
7. No wearing parts
8. Resistance to harsh environments
9. Long life when properly sized and aligned
10. High power density (higher torque for a given outside diameter)
Model NO.
Power/Speed
(Kw/rpm)
Nominal torque
(KNm)
Peak torque
(KNm)
A
(mm)
AG
(mm)
B
(mm)
C max (mm)
F
(mm)
Wmax
(mm)
W available sizes
20# (seamless sleeve)
W available sizes
16Mn(seamless sleeve)
TACL6247
1.28
12.22
32
247
297
182
130
140
159
159x4.5,152x5,146x6
140x7
TACL6272
2.16
20.62
45
272
324
196
140
150
180
180x6,168x6,159x6
159x5,146x8
TACL8302
3.46
33
78
302
350
224
155
165
180
180x7,168x10
180x6,168x8,168x7
TACL8333
4.13
39.44
101
333
394
238
170
180
219
219x6,203x8,194x8
194x6,180x8,168x8
TACL8363
6.6
63
140
363
420
260
185
200
244
244x8,219x10,203x12
244x6.5,219x8,203x10
TACL8396
8.5
81.11
197
396
452
280
200
215
272
272x10,244x14,219x16
272x10,245x10,219x14
TACL8425
11
105
217
425
487
294
210
230
272
272x10,244x14,219x16
272x10,245x10,219x14
TACL8457
14
133.7
320
457
527
322
230
240
298
298x12,272x14
298x10,272x12,272x10
TACL8493
17
162.3
355
493
563
352
250
260
324
324x10,298x12,272x14
324x9,298x10,272x12
TACL0537
25
238.75
548
537
617
374
265
280
350
350x12,324x16
350x10,324x14,324x12
TACL0580
35
334.25
770
580
648
415
290
305
350
350x12,324x16
350x10,324x14,324x12
TACL0630
42
401.1
920
630
688
452
320
330
400
400x16,376x18
400x14,350x14,
keywords:- disc coupling
- diaphragm couplings
- high speed coupling
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- coupler manufacturer
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