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Flexible Couplings - Bellows type, miniature, zero backlash, MK2 series, (Inches).

R+W

Features
Low restoring forces on coupled shafts
Easy installation
Light weight and low moment of inertia

Design
Two clamping hubs concentrically mounted to flexible bellows.

Material
Bellows: high grade stainless steel
Hubs: aluminum

Advantage
Precise and well-balanced transmission with zero backlash

Pilot bore parts can be found on the metric page here.

Part Number

Configured Part Number is shown.

Product Specifications
Part Numbers

: 30; 45; 60

Part Number
MK2/5/25/3.175/6.35
MK2/5/25/4.76/6.35
MK2/5/25/6.35/6.35
MK2/5/28/3.175/6.35
MK2/5/28/4.76/6.35
MK2/5/28/6.35/6.35
MK2/5/31/3.175/6.35
MK2/5/31/4.76/6.35
MK2/5/31/6.35/6.35
MK2/10/27/3.175/6.35
MK2/10/27/4.76/6.35
MK2/10/27/6.35/6.35
MK2/10/30/3.175/6.35
MK2/10/30/4.76/6.35
MK2/10/30/6.35/6.35
MK2/10/33/3.175/6.35
MK2/10/33/4.76/6.35
MK2/10/33/6.35/6.35
MK2/15/30/3.175/6.35
MK2/15/30/4.76/6.35
MK2/15/30/6.35/6.35
MK2/15/35/3.175/6.35
MK2/15/35/4.76/6.35
MK2/15/35/6.35/6.35
MK2/20/35/3.175/6.35
MK2/20/35/4.76/6.35
MK2/20/35/6.35/6.35
MK2/20/40/3.175/6.35
MK2/20/40/4.76/6.35
MK2/20/40/6.35/6.35
MK2/20/44/3.175/6.35
MK2/20/44/4.76/6.35
MK2/20/44/6.35/6.35
MK2/45/46/6.35/6.35
MK2/100/50/6.35/6.35
MK2/100/60/6.35/6.35

Minimum order quantity	Days to Ship	Allowable Torque Range (N•m)	Outer Dia. A (Ø)	Overall Length W (mm)	Allowable Torque (N•m)	Allowable Angular Misalignment (deg)	Allowable Lateral Misalignment Range (mm)	Allowable Lateral Misalignment (mm)	Moment of Inertia (kg･m²)	For Shaft Size D1 (inch)	For Shaft Size D2 (inch)	Size
1 Piece(s)	5 Days	0.05~1.00	15	25	0.5	1	0.02~0.2	0.15	0.000000005	1/8	1/4	5
1 Piece(s)	21 Days	0.05~1.00	15	25	0.5	1	0.02~0.2	0.15	0.000000005	3/16	1/4	5
1 Piece(s)	5 Days	0.05~1.00	15	25	0.5	1	0.02~0.2	0.15	0.000000005	1/4	1/4	5
1 Piece(s)	5 Days	0.05~1.00	15	28	0.5	1.5	0.02~0.2	0.2	0.000000005	1/8	1/4	5
1 Piece(s)	21 Days	0.05~1.00	15	28	0.5	1.5	0.02~0.2	0.2	0.000000005	3/16	1/4	5
1 Piece(s)	5 Days	0.05~1.00	15	28	0.5	1.5	0.02~0.2	0.2	0.000000005	1/4	1/4	5
1 Piece(s)	5 Days	0.05~1.00	15	31	0.5	2	0.21~0.40	0.25	0.000000005	1/8	1/4	5
1 Piece(s)	21 Days	0.05~1.00	15	31	0.5	2	0.21~0.40	0.25	0.000000005	3/16	1/4	5
1 Piece(s)	5 Days	0.05~1.00	15	31	0.5	2	0.21~0.40	0.25	0.000000005	1/4	1/4	5
1 Piece(s)	5 Days	0.05~1.00	15	27	1	1	0.02~0.2	0.15	0.00000003	1/8	1/4	10
1 Piece(s)	21 Days	0.05~1.00	15	27	1	1	0.02~0.2	0.15	0.00000003	3/16	1/4	10
1 Piece(s)	5 Days	0.05~1.00	15	27	1	1	0.02~0.2	0.15	0.00000003	1/4	1/4	10
1 Piece(s)	5 Days	0.05~1.00	15	30	1	1.5	0.02~0.2	0.2	0.00000003	1/8	1/4	10
1 Piece(s)	21 Days	0.05~1.00	15	30	1	1.5	0.02~0.2	0.2	0.00000003	3/16	1/4	10
1 Piece(s)	5 Days	0.05~1.00	15	30	1	1.5	0.02~0.2	0.2	0.00000003	1/4	1/4	10
1 Piece(s)	5 Days	0.05~1.00	15	33	1	2	0.21~0.40	0.25	0.00000003	1/8	1/4	10
1 Piece(s)	21 Days	0.05~1.00	15	33	1	2	0.21~0.40	0.25	0.00000003	3/16	1/4	10
1 Piece(s)	5 Days	0.05~1.00	15	33	1	2	0.21~0.40	0.25	0.00000003	1/4	1/4	10
1 Piece(s)	21 Days	1.01~3.00	19	30	1.5	1.5	0.02~0.2	0.15	0.00000085	1/8	1/4	15
1 Piece(s)	21 Days	1.01~3.00	19	30	1.5	1.5	0.02~0.2	0.15	0.00000085	3/16	1/4	15
1 Piece(s)	5 Days	1.01~3.00	19	30	1.5	1.5	0.02~0.2	0.15	0.00000085	1/4	1/4	15
1 Piece(s)	21 Days	1.01~3.00	19	35	1.5	1.5	0.02~0.2	0.15	0.00000085	1/8	1/4	15
1 Piece(s)	21 Days	1.01~3.00	19	35	1.5	1.5	0.02~0.2	0.15	0.00000085	3/16	1/4	15
1 Piece(s)	5 Days	1.01~3.00	19	35	1.5	1.5	0.02~0.2	0.15	0.00000085	1/4	1/4	15
1 Piece(s)	21 Days	1.01~3.00	25	35	2	1.5	0.02~0.2	0.15	0.0000025	1/8	1/4	20
1 Piece(s)	21 Days	1.01~3.00	25	35	2	1.5	0.02~0.2	0.15	0.0000025	3/16	1/4	20
1 Piece(s)	5 Days	1.01~3.00	25	35	2	1.5	0.02~0.2	0.15	0.0000025	1/4	1/4	20
1 Piece(s)	21 Days	1.01~3.00	25	40	2	1.5	0.02~0.2	0.2	0.0000025	1/8	1/4	20
1 Piece(s)	21 Days	1.01~3.00	25	40	2	1.5	0.02~0.2	0.2	0.0000025	3/16	1/4	20
1 Piece(s)	5 Days	1.01~3.00	25	40	2	1.5	0.02~0.2	0.2	0.0000025	1/4	1/4	20
1 Piece(s)	21 Days	1.01~3.00	25	44	2	2	0.21~0.40	0.25	0.0000025	1/8	1/4	20
1 Piece(s)	21 Days	1.01~3.00	25	44	2	2	0.21~0.40	0.25	0.0000025	3/16	1/4	20
1 Piece(s)	5 Days	1.01~3.00	25	44	2	2	0.21~0.40	0.25	0.0000025	1/4	1/4	20
1 Piece(s)	21 Days	3.01~5.00	32	46	4.5	1.5	0.02~0.2	0.2	0.00001	1/4	1/4	45
1 Piece(s)	21 Days	5.01~10.00	40	50	10	1.5	0.02~0.2	0.2	0.000016	1/4	1/4	100
1 Piece(s)	21 Days	5.01~10.00	40	60	10	2	0.21~0.40	0.3	0.000016	1/4	1/4	100

Basic Information

Type	Bellows Type	Max. Rotational Speed Range(r/min)	4001~10000	Feature	No Backlash / Low Moment of Inertia
Body Material	Aluminum	Max. Rotational Speed(r/min)	10,000	Bellows Part Material	Stainless Steel
Operating Temperature Range(℃)	-30::100	Fit Length (mm)(mm)	13	Torsional Stiffness (N-m/rad)(N-m/rad)	7
Tightening Torque of the Fastening Screw (N-m)(N-m)	4

Configure

36 Part Numbers

View Part Numbers

Configure Remaining Specifications

Completed

Specification/Dimensions

Allowable Torque Range(N•m)
0.05~1.00

1.01~3.00

3.01~5.00

5.01~10.00
Clear
Outer Dia. A(Ø)
15

19

25

32

40
Clear
Overall Length W(mm)
25

27

28

30

31

33

35

40

44

46

50

54

60
Clear
Allowable Torque(N•m)
0.5

1

1.5

2

4.5

10
Clear
Allowable Angular Misalignment(deg)
1

1.5

2
Clear
Allowable Lateral Misalignment Range(mm)
0.02~0.2

0.21~0.40
Clear
Allowable Lateral Misalignment(mm)
0.15

0.2

0.25

0.3
Clear
For Shaft Size D1(inch)
1/2

1/4

1/8

3/4

3/8

3/16

5/8

5/16

7/8

7/16
Clear
Size
5

10

15

20

45

100
Clear
For Shaft Size D2(inch)
1/2

1/4

1/8

3/4

3/8

3/16

5/8

5/16

7/8

7/16
Clear
CAD
- 3D
Clear

Days to Ship

All

5 Days or Less

21 Days or Less
Clear

Specify Alterations

The specifications and dimensions of some parts may not be fully covered. For exact details, refer to manufacturer catalogs .

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Applications

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How can we improve?

Flexible Couplings - Bellows type, miniature, zero backlash, MK2 series, (Inches).

Basic Information

Configure

Specification/Dimensions

Allowable Torque Range(N•m)

Outer Dia. A(Ø)

Overall Length W(mm)

Allowable Torque(N•m)

Allowable Angular Misalignment(deg)

Allowable Lateral Misalignment Range(mm)

Allowable Lateral Misalignment(mm)

For Shaft Size D1(inch)

Size

For Shaft Size D2(inch)

CAD