Bellow couplings / grub screw clamping / bellows: stainless steel, TOMBAK / body: aluminium / MK1 / R+W ANTRIEBSELEMENTE

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Design
· Two hubs with radial set screws concentrically mounted to flexible bellows
· Speeds up to 20,000 rpm; over 20,000 with finely balanced version

Material
· Bellows:
from series 0,5 – tombac
from series 1 – high grade stainless steel
· Hubs: aluminum

Temperature range
· -30 °C to +100 °C (-22 °F to +212 °F)

Features
· Integrated dismounting groove
· Low-cost design
· Low moment of inertia

Part Number

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Product specification
Part Numbers
Catalog

MK1 with Radial Set Screws 0.05 - 10 Nm

Product Properties

Features

• integral dismounting groove eliminates the need for flats on shafts
• economical design
• larger bore diameters in a small size possible

Material

• Bellows: size 0.5 tombac; sizes 1 and up high grade stainless steel
• Hubs: aluminium

Design

Two hubs with radial set screws concentrically mounted to flexible bellows. Speeds up to 20,000 rpm; over 20,000 with finely balanced version.

Advantage

Bore diameters above 4mm have an integral dismounting groove, which provides clearance over any burr which may be kicked up by the set screw, eliminating the need for flats on shafts.

Drawing

Drawing

SIZE			0.5	1	5			10			15		20			45		100
Rated torque	(Nm)	T_KN	0.05	0.1	0.5			1.0			1.5		2.0			4.5		10
Overall length	(mm)	A^-1	14	20	20	23	26	22	25	28	24	29	26	31	35	37	45	43	53
Outside diameter	(mm)	B	6.5	10	15			15			19		25			32		40
Fit length	(mm)	C	4	5	6.5			6.5			7.5		11			13		15
Inside diameter possible from Ø to Ø H7	(mm)	D_1/2	1-3	1-5	3-9			3-9			3-12		3-16			6-22		6-28
Clamping screw ISO 4029		E	1xM2	1xM2.5	1xM3			1xM3			2xM3		2xM4			2xM5		2xM6
Tightening torque of the fastening screw	(Nm)	E	0.35	0.75	1.3			1.3			1.3		2.5			4		6
Distance	(mm)	G	1.5	1.8	2			2			2		2.5			3.5		4
Moment of inertia	(gcm²)	J_ges.	0.1	0.4	1.1	1.2	1.3	1.3	1.8	2	4.7	5.5	15	18	20	65	70	180	220
Approximate weight	(g)		1	5	6	6	6	6	7	8	12	14	22	24	26	54	58	106	114
Torsional stiffness	(Nm/rad)	C_T	50	70	280	210	170	510	380	320	750	700	1200	1300	1200	7000	5000	9050	8800
Axial	(mm)	Max. values	0.4	0.4	0.4	0.5	0.6	0.4	0.5	0.6	0.5	0.7	0.5	0.6	0.7	0.7	1	1	1.2
Lateral	(mm)		0.1	0.15	0.15	0.2	0.25	0.15	0.2	0.25	0.15	0.2	0.15	0.2	0.25	0.2	0.25	0.2	0.3
Angular	(degree)		1	1	1	1.5	2	1	1.5	2	1.5	1.5	1.5	1.5	2	1.5	2	1.5	2

Ordering Example

Ordering Example	MK1	5	26	4.76	5	XX
Model	•					Special designation only (e.g. high speed balancing).
Size		•
Overall length mm			•
Bore D1 H7				•
Bore D2 H7					•

For custom features place an XX at the end of the part number and describe the special requirements (e.g. MK1 / 5 / 26 / 4.76 / 5 / XX; XX=finely balanced for 25,000 rpm)

Data to be displayed: 30; 45; 60

Part Number
MK1/15/24/[3-12/1]/[3-12/1]
MK1/15/29/[3-12/1]/[3-12/1]
MK1/20/26/[3-16/1]/[3-16/1]
MK1/20/31/[3-16/1]/[3-16/1]
MK1/20/35/[3-16/1]/[3-16/1]

Minimum order quantity	Standard Shipping Days ?	Allowable Torque Range (N•m)	Shaft Bore Dia. (machined) D1 (mm)	Shaft Bore Dia. (machined) D2 (mm)	Outer Dia. A (mm)	Overall Length W (mm)	Allowable Torque (Nm)	Allowable Lateral Misalignment (mm)	Allowable Angular Misalignment (deg)	Bellows Part Material	Allowable Axial Clearance (±) (mm)	Moment of Inertia (kg･m²)
1	17 Days	1.01 to 3.00	3 ～ 12	3 ～ 12	19	24	1.3	0.15	1.5	Stainless Steel	0.5	0.0047
1	17 Days	1.01 to 3.00	3 ～ 12	3 ～ 12	19	29	1.3	0.2	1.5	Stainless Steel	0.7	0.0055
1	17 Days	1.01 to 3.00	3 ～ 16	3 ～ 16	25	26	2.5	0.15	1.5	Stainless Steel	0.5	0.015
1	17 Days	1.01 to 3.00	3 ～ 16	3 ～ 16	25	31	2.5	0.2	1.5	Stainless Steel	0.6	0.018
1	17 Days	1.01 to 3.00	3 ～ 16	3 ～ 16	25	35	2.5	0.25	2	Stainless Steel	0.7	0.02

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Basic information

Type	Bellows Type	Body Material	Aluminum

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Basic Attributes

Shaft Bore Dia. (machined) D1(mm)
[3-16/1mm Unit(s)]
Clear
Shaft Bore Dia. (machined) D2(mm)
[3-16/1mm Unit(s)]
Clear
Outer Dia. A(mm)
6.5

10

15

19

25

32

40
Clear
Overall Length W(mm)
14

20

22

23

24

25

26

28

29

31

35

37

43

45

53
Clear
Allowable Torque(Nm)
0.35

0.75

1.3

2.5

3.5

4
Clear
Allowable Lateral Misalignment(mm)
0.1

0.15

0.2

0.25

0.3
Clear
Allowable Angular Misalignment(deg)
1

1.5

2
Clear
Bellows Part Material
- Stainless Steel
- Others
Clear
Type
- MK1
Clear
Allowable Torque Range(N•m)
0.05 to 1.00

1.01 to 3.00

3.01 to 5.00

10.01 to 20.00
Clear