Slit couplings / hub clamping / cross slot / body: aluminium, steel, stainless steel / ASK / VMA Antriebstechnik

Stable and wear-free - even at high torques
· Isogonal power transmission
· Equalizes offsets
· Good resonance damping
· Extremely torsionally stiff
· High level of thermal stability
· Low mass inertia

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Type ASK Patented, Sliced Coupling – with Customizable Dimension Options

Product Description

The ASK sliced coupling is the ideal tool for equalizing all kinds of offset. Its unique slit structure represents the perfect solution for misaligned shafts or installation situations involving high levels of resonance.
But the benefits of the parallel slit levels are not restricted to resonance damping: The ASK type series is also ideally suited to applications involving frequent load changes, even during reversing duty.

Another standout feature of this coupling is its one-part, compact design. The resulting high torsional stiffness and true running accuracy create excellent rotational characteristics that enable high speeds to be achieved. Thanks to the simple assembly method, which can be performed in a matter of seconds using just a single DIN 911 tool, couplings of this type can be incorporated into any drive train.

ASK sliced couplings from the standard range are suitable for shaft diameters ranging from 4 to 60 mm. However, we also offer a large number of special designs that allow you to choose from a wide range of fastening options – from the standard clamping hub connection, grub screw fastening on the shaft, spread hubs for hollow shafts, half-shell designs, and thread shaft connections, right through to VMA clamping device fastening methods that are suitable for larger diameters and ensure completely backlash-free power transmission.

Sliced couplings can be used in a varied range of applications. Their technology can be adapted to meet customer-specific requirements.

Offset equalizing options with ASK couplings


axial	lateral	angular

ASK-BB Aluminum Alloy

Dimensions

Type	ASK-BB aluminum alloy
Dimensions in mm
ASK size	018	022	020	025	030	040	050	060	070	080	100
L	17	20	28	28	40	48	65	80	95	100	118
M	2.5	2.75	4	4	5.5	5.5	9.5	12.5	12.5	12.5	15
N	5	5.5	8	8	11	11	19	25	25	25	30
E	5.5	7.2	6.5	9	10.5	14	18.5	21	25	29	37
D	18	22	20	25	30	40	50	60	70	80	100
D1 ISO fit H7	3-6	3-10	4-8	6-12	6-14	8-19	12-26	14-28	20-35	25-42	30-55
D2 ISO fit H7	3-6	3-10	4-8	6-12	6-14	8-19	12-26	14-28	20-35	25-42	30-55
D1 pre-drilled	2.5	2.5	2.5	3.5	5.5	5.5	8.5	8.5	18.5	23.5	28.5
D2 pre-drilled	6	2.5	2.5	3.5	5.5	5.5	8.5	8.5	18.5	23.5	28.5
G Din 912	M2.5	M2.5	M2.5	M3	M4	M5	M6	M8	M8	M8	M10
Fastening torque of screw Ma max. Nm	1.57	1.57	1.57	1.88	4.30	8.45	14.5	35	35	35	70
Number of screws	2	2	2	2	2	2	2	2	4	4	4
Installation wrench	DIN 911

Technical Data

Technical data
Rated torque Nm		2	2	3	6	8	18	30	65	120	170	300
Torsional stiffness 10³ Nm/Rad		0.2	0.2	0.8	3.4	4.6	11	24	54	88	93	190
Mass		8	15	20	30	50	100	300	400	700	900	1500
Moment of inertia 10^-6 kgm²		0.3	0.4	1.5	4.3	11	35	114	285	480	695	1060
Permitted shaft offset	angular °	1	1	2	2	1.7	1.7	1.4	1.4	1.1	1.1	1.1
	lateral mm	0.3	0.3	0.2	0.2	0.2	0.3	0.3	0.3	0.3	0.3	0.3
	axial mm	0.4	0.4	0.2	0.2	0.2	0.2	0.2	0.3	0.3	0.3	0.3

Material

Material: Aluminum alloy; rust-proof design; steel; all parts are also available with a feather key ways.
Speed: > 6,000 rpm; max. speeds of approx. 20,000 rpm on request; high temperatures of up to 500°C possible


ASK 018 BB / 022	ASK 020-100 BB

ASK-BB Steel/Stainless Steel

Dimensions

Type	ASK-BB steel/stainless steel
Dimensions in mm
ASK size	020	025	030	040	050	060	070	080	100
L	28	28	40	48	65	80	95	100	118
M	4	4	5.5	5.5	9.5	12.5	12.5	12.5	15
N	8	8	11	11	19	25	25	25	30
E	6.5	9	10.5	14	18.5	21	25	29	37
D	20	25	30	40	50	60	70	80	100
D1 ISO fit H7	4-8	6-12	6-14	8-19	12-26	14-28	20-35	25-42	30-55
D2 ISO fit H7	4-8	6-12	6-14	8-19	12-26	14-28	20-35	25-42	30-55
D1 pre-drilled	2.5	3.5	5.5	5.5	8.5	14.5	18.5	23.5	28.5
D2 pre-drilled	2.5	3.5	5.5	5.5	8.5	14.5	18.5	23.5	28.5
G Din 912	M2.5	M3	M4	M5	M6	M8	M8	M8	M10
Fastening torque of screw Ma max. Nm	1.57	1.88	4.30	8.45	14.5	35	35	35	70
Number of screws	2	2	2	2	2	2	4	4	4

Technical Data

Technical data
Rated torque Nm		10	14	18	30	60	110	190	240	400
Torsional stiffness 10³ Nm/Rad		0.8	6	8	21	50	95	120	140	180
Mass (approx.) in g		45	75	140	320	650	1300	1850	3100	4200
Permitted shaft offset	angular °	1	2	1.7	1.7	1	1	1	1	1
	lateral mm	0.2	0.2	0.2	0.3	0.3	0.3	0.3	0.2	0.2
	axial mm	0.2	0.2	0.2	0.2	0.2	0.2	0.2	0.2	0.2

Material

Material: 1.4305/steel


ASK 018 BB / 022 BB	ASK 020 BB / 100 BB

Sliced Couplings for Various Installation Situations and Shaft Connections

Material: Aluminum alloy; stainless steel; steel; PEEK


Coupling with spread hub for hollow shafts	Coupling with thread connection for thread shafts
(order example: ASK 025 BC 6H7/8h6)	(order example: ASK 018 M-M M5/M6)

Data to be displayed: 30; 45; 60

Part Number
ASK-018-BB-[3-6/1]-[3-6/1]-AL
ASK-020-BB-[4-8/1]-[4-8/1]-AL
ASK-020-BB-[4-8/1]-[4-8/1]-SS
ASK-022-BB-[3-10/1]-[3-10/1]-AL
ASK-025-BB-[6-12/1]-[6-12/1]-AL
ASK-025-BB-[6-12/1]-[6-12/1]-S
ASK-025-BB-[6-12/1]-[6-12/1]-SS
ASK-030-BB-[6-14/1]-[6-14/1]-AL
ASK-030-BB-[6-14/1]-[6-14/1]-S
ASK-030-BB-[6-14/1]-[6-14/1]-SS
ASK-040-BB-5.5-5.5-AL
ASK-040-BB-5.5-[8-19/1]-AL
ASK-040-BB-[8-19/1]-5.5-AL
ASK-040-BB-[8-19/1]-[8-19/1]-AL
ASK-040-BB-[8-19/1]-[8-19/1]-S
ASK-040-BB-[8-19/1]-[8-19/1]-SS
ASK-050-BB-[12-26/1]-[12-26/1]-AL
ASK-050-BB-[12-26/1]-[12-26/1]-S
ASK-050-BB-[12-26/1]-[12-26/1]-SS
ASK-060-BB-[14-28/1]-[14-28/1]-AL
ASK-060-BB-[14-28/1]-[14-28/1]-S
ASK-060-BB-[14-28/1]-[14-28/1]-SS
ASK-070-BB-[20-35/1]-[20-35/1]-AL
ASK-070-BB-[20-35/1]-[20-35/1]-S
ASK-070-BB-[20-35/1]-[20-35/1]-SS
ASK-080-BB-[25-42/1]-[25-42/1]-AL
ASK-080-BB-[25-42/1]-[25-42/1]-S
ASK-080-BB-[25-42/1]-[25-42/1]-SS
ASK-100-BB-[30-55/1]-[30-55/1]-AL
ASK-100-BB-[30-55/1]-[30-55/1]-S
ASK-100-BB-[30-55/1]-[30-55/1]-SS

Related to	Minimum order quantity	Standard Shipping Days ?	RoHS	Shaft Bore Dia. (machined) D1 (mm)	Shaft Bore Dia. (machined) D2 (mm)	Outer Dia. A (mm)	Overall Length W (mm)	Body Material	Allowable Torque (Nm)	Allowable Lateral Misalignment (mm)	Allowable Angular Misalignment (deg)	Allowable Axial Clearance (±) (mm)	Moment of Inertia (kg･m²)
Data sheet	1	4 Days	10	2.5	2.5	18	17	Aluminum Alloy	2	0.3	1	0.4	0.0000003
Data sheet	1	4 Days	10	2.5	2.5	20	28	Aluminum Alloy	3	0.2	2	0.2	0.0000015
Data sheet	1	4 Days	10	2.5	2.5	20	28	Stainless Steel	10	0.2	1	0.2	-
Data sheet	1	4 Days	10	2.5	2.5	22	20	Aluminum Alloy	2	0.2	1	0.4	0.0000004
Data sheet	1	4 Days	10	3.5	3.5	25	28	Aluminum Alloy	6	0.2	2	0.2	0.0000043
Data sheet	1	4 Days	10	3.5	3.5	25	28	Steel	10	0.2	1	0.2	-
Data sheet	1	4 Days	10	3.5	3.5	25	28	Stainless Steel	14	0.2	2	0.2	-
Data sheet	1	4 Days	10	5.5	5.5	30	40	Aluminum Alloy	8	0.3	1.7	0.2	0.000011
Data sheet	1	4 Days	10	5.5	5.5	30	40	Steel	14	0.2	2	0.2	-
Data sheet	1	4 Days	10	5.5	5.5	30	40	Stainless Steel	18	0.2	1.7	0.2	-
Data sheet	1	4 Days	10	5.5	5.5	40	48	Aluminum Alloy	18	0.3	1.7	0.2	0.000035
Data sheet	1	4 Days	10	5.5	5.5	40	48	Aluminum Alloy	18	0.3	1.7	0.2	0.000035
Data sheet	1	4 Days	10	5.5	5.5	40	48	Aluminum Alloy	18	0.3	1.7	0.2	0.000035
Data sheet	1	4 Days	10	5.5	5.5	40	48	Aluminum Alloy	18	0.3	1.7	0.2	0.000035
Data sheet	1	4 Days	10	5.5	5.5	40	48	Steel	18	0.2	1.7	0.2	-
Data sheet	1	4 Days	10	5.5	5.5	40	48	Stainless Steel	30	0.3	1.7	0.2	-
Data sheet	1	4 Days	10	8.5	8.5	50	65	Aluminum Alloy	30	0.3	1.4	0.2	0.000114
Data sheet	1	4 Days	10	8.5	8.5	50	65	Steel	30	0.3	1.7	0.2	-
Data sheet	1	4 Days	10	8.5	8.5	50	65	Stainless Steel	60	0.3	1	0.2	-
Data sheet	1	4 Days	10	8.5	8.5	60	80	Aluminum Alloy	65	0.3	1.4	0.3	0.000285
Data sheet	1	4 Days	10	14.5	14.5	60	80	Steel	60	0.3	1	0.2	-
Data sheet	1	4 Days	10	14.5	14.5	60	80	Stainless Steel	110	0.3	1	0.2	-
Data sheet	1	4 Days	10	18.5	18.5	70	95	Aluminum Alloy	120	0.3	1.1	0.3	0.00048
Data sheet	1	4 Days	10	18.5	18.5	70	95	Steel	110	0.3	1	0.2	-
Data sheet	1	4 Days	10	18.5	18.5	70	95	Stainless Steel	190	0.3	1	0.2	-
Data sheet	1	4 Days	10	23.5	23.5	80	100	Aluminum Alloy	170	0.3	1.1	0.3	0.000695
Data sheet	1	4 Days	10	23.5	23.5	80	100	Steel	190	0.3	1	0.2	-
Data sheet	1	4 Days	10	23.5	23.5	80	100	Stainless Steel	240	0.2	1	0.2	-
Data sheet	1	4 Days	10	28.5	28.5	100	118	Aluminum Alloy	300	0.3	1.1	0.3	0.00106
Data sheet	1	4 Days	10	28.5	28.5	100	118	Steel	240	0.2	1	0.2	-
Data sheet	1	4 Days	10	28.5	28.5	100	118	Stainless Steel	600	0.2	1	0.2	-

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Basic information

Type	With Slit	Allowable Misalignment	Angular Misalignment / Eccentricity / Axial Misalignment	Application	Standard / Servo Motor / Stepping Motor / Encoder
Max. Rotational Speed(r/min)	20000

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31Suggestion of an applicable part number.

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The part number is completed.

Basic Attributes

Shaft Bore Dia. (machined) D1(mm)
2.5

3.5

5.5

8.5

14.5

18.5

23.5

28.5
[3-55/1mm Unit(s)]
Clear
Shaft Bore Dia. (machined) D2(mm)
2.5

3.5

5.5

8.5

14.5

18.5

23.5

28.5
[3-55/1mm Unit(s)]
Clear
Outer Dia. A(mm)
18

20

22

25

30

40

50

60

70

80

100
Clear
Overall Length W(mm)
17

20

28

40

48

65

80

95

100

118
Clear
Body Material
Stainless Steel

Steel

Aluminum Alloy
Clear
Allowable Torque(Nm)
2

3

6

8

10

14

18

30

60

65

110

120

170

190

240

300

600
Clear
Allowable Lateral Misalignment(mm)
0.2

0.3
Clear
Allowable Angular Misalignment(deg)
1

1.1

1.4

1.7

2
Clear
Type
- ASK
Clear