Bellow couplings / hub clamping / bellows: stainless steel / body: aluminium / KB4C / KBK

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· Backlash-free metal bellows coupling with compact clamp hubs
· For shaft diameters from 10 - 70mm
· High torsional stiffness, compensation of shaft misalignment at low restoring forces
· Perfect bellows coupling for connecting servo motors, e.g. in machine tools, automation techniques, packing machines, wood working machines
· Torque range: 18 - 500Nm

Part Number

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Data to be displayed: 30; 45; 60

Part Number
KB4C/18-58-[10-25.4/0.1]-[10-25.4/0.1]
KB4C/18-58-[10-25.4/0.1]-N[10-25.4/0.1]
KB4C/18-58-N[10-25.4/0.1]-[10-25.4/0.1]
KB4C/18-58-N[10-25.4/0.1]-N[10-25.4/0.1]
KB4C/18-66-[10-25.4/0.1]-[10-25.4/0.1]
KB4C/18-66-[10-25.4/0.1]-N[10-25.4/0.1]
KB4C/18-66-N[10-25.4/0.1]-[10-25.4/0.1]
KB4C/18-66-N[10-25.4/0.1]-N[10-25.4/0.1]
KB4C/30-58-[10-32/1]-[10-32/1]
KB4C/30-58-[10-32/1]-N[10-32/1]
KB4C/30-58-N[10-32/1]-[10-32/1]
KB4C/30-58-N[10-32/1]-N[10-32/1]
KB4C/30-66-[10-32/1]-[10-32/1]
KB4C/30-66-[10-32/1]-N[10-32/1]
KB4C/30-66-N[10-32/1]-[10-32/1]
KB4C/30-66-N[10-32/1]-N[10-32/1]
KB4C/60-67-[12-35/1]-[12-35/1]
KB4C/60-67-[12-35/1]-N[12-35/1]
KB4C/60-67-N[12-35/1]-[12-35/1]
KB4C/60-67-N[12-35/1]-N[12-35/1]
KB4C/60-77-[12-35/1]-[12-35/1]
KB4C/60-77-[12-35/1]-N[12-35/1]
KB4C/60-77-N[12-35/1]-[12-35/1]
KB4C/60-77-N[12-35/1]-N[12-35/1]
KB4C/80-78-[12-44/1]-[12-44/1]
KB4C/80-78-[12-44/1]-N[12-44/1]
KB4C/80-78-N[12-44/1]-[12-44/1]
KB4C/80-78-N[12-44/1]-N[12-44/1]
KB4C/80-89-[12-44/1]-[12-44/1]
KB4C/80-89-[12-44/1]-N[12-44/1]
KB4C/80-89-N[12-44/1]-[12-44/1]
KB4C/80-89-N[12-44/1]-N[12-44/1]
KB4C/150-78-[14-44/1]-[14-44/1]
KB4C/150-78-[14-44/1]-N[14-44/1]
KB4C/150-78-N[14-44/1]-[14-44/1]
KB4C/150-78-N[14-44/1]-N[14-44/1]
KB4C/150-89-[14-44/1]-[14-44/1]
KB4C/150-89-[14-44/1]-N[14-44/1]
KB4C/150-89-N[14-44/1]-[14-44/1]
KB4C/150-89-N[14-44/1]-N[14-44/1]
KB4C/200-83-[16-47/1]-[16-47/1]
KB4C/200-83-[16-47/1]-N[16-47/1]
KB4C/200-83-N[16-47/1]-[16-47/1]
KB4C/200-83-N[16-47/1]-N[16-47/1]
KB4C/200-84-[16-48/1]-[16-48/1]
KB4C/300-94-[20-60/1]-[20-60/1]
KB4C/300-94-[20-60/1]-N[20-60/1]
KB4C/300-94-N[20-60/1]-[20-60/1]
KB4C/300-94-N[20-60/1]-N[20-60/1]
KB4C/300-105-[20-60/1]-[20-60/1]
KB4C/300-105-[20-60/1]-N[20-60/1]
KB4C/300-105-N[20-60/1]-[20-60/1]
KB4C/300-105-N[20-60/1]-N[20-60/1]
KB4C/500-100-[25-70/1]-[25-70/1]
KB4C/500-100-[25-70/1]-N[25-70/1]
KB4C/500-100-N[25-70/1]-[25-70/1]
KB4C/500-100-N[25-70/1]-N[25-70/1]
KB4C/500-111-[25-70/1]-[25-70/1]
KB4C/500-111-[25-70/1]-N[25-70/1]
KB4C/500-111-N[25-70/1]-[25-70/1]

Related to	Standard Unit Price	Minimum order quantity	Standard Shipping Days ?	RoHS	Shaft Bore Dia. (machined) D1 (mm)	Shaft Bore Dia. (machined) D2 (mm)	Outer Dia. A (mm)	Length L (mm)	Allowable Torque (Nm)	Max. Rotational Speed (r/min)	Allowable Lateral Misalignment (mm)	Allowable Angular Misalignment (deg)	Allowable Axial Clearance (±) (mm)	Applicable Range (Bore 1)	Applicable Range (Bore 2)	Maximum D1 Bore Size with Keyway	Maximum D2 Bore Size with Keyway	Keyway D1	Keyway D2
Data sheet	-	1	12 Days	10	10 ～ 25.4	10 ～ 25.4	45	58	18	12800	0.2	1.5	0.5	10-25,4	10-25,4	25.4	25.4	No	No
Data sheet	-	1	12 Days	10	10 ～ 25.4	10 ～ 25.4	45	58	18	12800	0.2	1.5	0.5	10-25,4	10-25,4	25.4	25.4	No	Yes
Data sheet	-	1	12 Days	10	10 ～ 25.4	10 ～ 25.4	45	58	18	12800	0.2	1.5	0.5	10-25,4	10-25,4	25.4	25.4	Yes	No
Data sheet	-	1	12 Days	10	10 ～ 25.4	10 ～ 25.4	45	58	18	12800	0.2	1.5	0.5	10-25,4	10-25,4	25.4	25.4	Yes	Yes
Data sheet	-	1	12 Days	10	10 ～ 25.4	10 ～ 25.4	45	66	18	12800	0.25	2	0.5	10.25-4	10.25-4	25.4	25.4	No	No
Data sheet	-	1	12 Days	10	10 ～ 25.4	10 ～ 25.4	45	66	18	12800	0.25	2	0.5	10.25-4	10.25-4	25.4	25.4	No	Yes
Data sheet	-	1	12 Days	10	10 ～ 25.4	10 ～ 25.4	45	66	18	12800	0.25	2	0.5	10.25-4	10.25-4	25.4	25.4	Yes	No
Data sheet	-	1	12 Days	10	10 ～ 25.4	10 ～ 25.4	45	66	18	12800	0.25	2	0.5	10.25-4	10.25-4	25.4	25.4	Yes	Yes
Data sheet	-	1	12 Days	10	10 ～ 32	10 ～ 32	56	58	30	10300	0.15	1.5	0.6	10-30	10-30	30	30	No	No
Data sheet	-	1	12 Days	10	10 ～ 32	10 ～ 32	56	58	30	10300	0.15	1.5	0.6	10-30	10-30	30	30	No	Yes
Data sheet	-	1	12 Days	10	10 ～ 32	10 ～ 32	56	58	30	10300	0.15	1.5	0.6	10-30	10-30	30	30	Yes	No
Data sheet	-	1	12 Days	10	10 ～ 32	10 ～ 32	56	58	30	10300	0.15	1.5	0.6	10-30	10-30	30	30	Yes	Yes
Data sheet	-	1	12 Days	10	10 ～ 32	10 ～ 32	56	66	30	10300	0.25	2	1	10-30	10-30	30	30	No	No
Data sheet	-	1	12 Days	10	10 ～ 32	10 ～ 32	56	66	30	10300	0.25	2	1	10-30	10-30	30	30	No	Yes
Data sheet	-	1	12 Days	10	10 ～ 32	10 ～ 32	56	66	30	10300	0.25	2	1	10-30	10-30	30	30	Yes	No
Data sheet	-	1	12 Days	10	10 ～ 32	10 ～ 32	56	66	30	10300	0.25	2	1	10-30	10-30	30	30	Yes	Yes
Data sheet	-	1	12 Days	10	12 ～ 35	12 ～ 35	66	67	60	8700	0.15	1.5	0.6	12-35	12-35	35	35	No	No
Data sheet	-	1	12 Days	10	12 ～ 35	12 ～ 35	66	67	60	8700	0.15	1.5	0.6	12-35	12-35	35	35	No	Yes
Data sheet	-	1	12 Days	10	12 ～ 35	12 ～ 35	66	67	60	8700	0.15	1.5	0.6	12-35	12-35	35	35	Yes	No
Data sheet	-	1	12 Days	10	12 ～ 35	12 ～ 35	66	67	60	8700	0.15	1.5	0.6	12-35	12-35	35	35	Yes	Yes
Data sheet	-	1	12 Days	10	12 ～ 35	12 ～ 35	66	77	60	8700	0.25	2	1	12-35	12-35	35	35	No	No
Data sheet	-	1	12 Days	10	12 ～ 35	12 ～ 35	66	77	60	8700	0.25	2	1	12-35	12-35	35	35	No	Yes
Data sheet	-	1	12 Days	10	12 ～ 35	12 ～ 35	66	77	60	8700	0.25	2	1	12-35	12-35	35	35	Yes	No
Data sheet	-	1	12 Days	10	12 ～ 35	12 ～ 35	66	77	60	8700	0.25	2	1	12-35	12-35	35	35	Yes	Yes
Data sheet	-	1	12 Days	10	12 ～ 44	12 ～ 44	82	78	80	6900	0.2	1.5	0.5	12-44	12-44	44	44	No	No
Data sheet	-	1	12 Days	10	12 ～ 44	12 ～ 44	82	78	80	6900	0.2	1.5	0.5	12-44	12-44	44	44	No	Yes
Data sheet	-	1	12 Days	10	12 ～ 44	12 ～ 44	82	78	80	6900	0.2	1.5	0.5	12-44	12-44	44	44	Yes	No
Data sheet	-	1	12 Days	10	12 ～ 44	12 ～ 44	82	78	80	6900	0.2	1.5	0.5	12-44	12-44	44	44	Yes	Yes
Data sheet	-	1	12 Days	10	12 ～ 44	12 ～ 44	82	89	80	6900	0.25	2	0.8	12-44	12-44	44	44	No	No
Data sheet	-	1	12 Days	10	12 ～ 44	12 ～ 44	82	89	80	6900	0.25	2	0.8	12-44	12-44	44	44	No	Yes
Data sheet	-	1	12 Days	10	12 ～ 44	12 ～ 44	82	89	80	6900	0.25	2	0.8	12-44	12-44	44	44	Yes	No
Data sheet	-	1	12 Days	10	12 ～ 44	12 ～ 44	82	89	80	6900	0.25	2	0.8	12-44	12-44	44	44	Yes	Yes
Data sheet	-	1	12 Days	10	14 ～ 44	14 ～ 44	82	78	150	6900	0.2	1.5	0.5	14-44	14-44	44	44	No	No
Data sheet	-	1	12 Days	10	14 ～ 44	14 ～ 44	82	78	150	6900	0.2	1.5	0.5	14-44	14-44	44	44	No	Yes
Data sheet	-	1	12 Days	10	14 ～ 44	14 ～ 44	82	78	150	6900	0.2	1.5	0.5	14-44	14-44	44	44	Yes	No
Data sheet	-	1	12 Days	10	14 ～ 44	14 ～ 44	82	78	150	6900	0.2	1.5	0.5	14-44	14-44	44	44	Yes	Yes
Data sheet	-	1	12 Days	10	14 ～ 44	14 ～ 44	82	89	150	6900	0.25	2	0.8	14-44	14-44	44	44	No	No
Data sheet	-	1	12 Days	10	14 ～ 44	14 ～ 44	82	89	150	6900	0.25	2	0.8	14-44	14-44	44	44	No	Yes
Data sheet	-	1	12 Days	10	14 ～ 44	14 ～ 44	82	89	150	6900	0.25	2	0.8	14-44	14-44	44	44	Yes	No
Data sheet	-	1	12 Days	10	14 ～ 44	14 ～ 44	82	89	150	6900	0.25	2	0.8	14-44	14-44	44	44	Yes	Yes
Data sheet	-	1	12 Days	10	16 ～ 47	16 ～ 47	90	83	200	6400	0.2	1.5	0.5	16-48	16-48	47	47	No	No
Data sheet	-	1	12 Days	10	16 ～ 47	16 ～ 47	90	83	200	6400	0.2	1.5	0.5	16-48	16-48	47	47	No	Yes
Data sheet	-	1	12 Days	10	16 ～ 47	16 ～ 47	90	83	200	6400	0.2	1.5	0.5	16-48	16-48	47	47	Yes	No
Data sheet	-	1	12 Days	10	16 ～ 47	16 ～ 47	90	83	200	6400	0.2	1.5	0.5	16-48	16-48	47	47	Yes	Yes
Data sheet	-	1	12 Days	10	16 ～ 48	-	90	94	200	6400	0.25	2	0.8	-	-	-	-	-	-
Data sheet	-	1	12 Days	10	20 ～ 60	20 ～ 60	110	94	300	6000	0.2	1.5	0.5	20-60	20-60	60	60	No	No
Data sheet	-	1	12 Days	10	20 ～ 60	20 ～ 60	110	94	300	6000	0.2	1.5	0.5	20-60	20-60	60	60	No	Yes
Data sheet	-	1	12 Days	10	20 ～ 60	20 ～ 60	110	94	300	6000	0.2	1.5	0.5	20-60	20-60	60	60	Yes	No
Data sheet	-	1	12 Days	10	20 ～ 60	20 ～ 60	110	94	300	6000	0.2	1.5	0.5	20-60	20-60	60	60	Yes	Yes
Data sheet	-	1	12 Days	10	20 ～ 60	20 ～ 60	110	105	300	6000	0.25	2	0.8	20-60	20-60	60	60	No	No
Data sheet	-	1	12 Days	10	20 ～ 60	20 ～ 60	110	105	300	6000	0.25	2	0.8	20-60	20-60	60	60	No	Yes
Data sheet	-	1	12 Days	10	20 ～ 60	20 ～ 60	110	105	300	6000	0.25	2	0.8	20-60	20-60	60	60	Yes	No
Data sheet	-	1	12 Days	10	20 ～ 60	20 ～ 60	110	105	300	6000	0.25	2	0.8	20-60	20-60	60	60	Yes	Yes
Data sheet	-	1	12 Days	10	25 ～ 70	25 ～ 70	122	100	500	5000	0.2	1.5	0.5	25-70	25-70	70	70	No	No
Data sheet	-	1	12 Days	10	25 ～ 70	25 ～ 70	122	100	500	5000	0.2	1.5	0.5	25-70	25-70	70	70	No	Yes
Data sheet	-	1	12 Days	10	25 ～ 70	25 ～ 70	122	100	500	5000	0.2	1.5	0.5	25-70	25-70	70	70	Yes	No
Data sheet	-	1	12 Days	10	25 ～ 70	25 ～ 70	122	100	500	5000	0.2	1.5	0.5	25-70	25-70	70	70	Yes	Yes
Data sheet	-	1	12 Days	10	25 ～ 70	25 ～ 70	122	111	500	5000	0.25	2	1	25-70	25-70	70	70	No	No
Data sheet	-	1	12 Days	10	25 ～ 70	25 ～ 70	122	111	500	5000	0.25	2	1	25-70	25-70	70	70	No	Yes
Data sheet	-	1	12 Days	10	25 ～ 70	25 ～ 70	122	111	500	5000	0.25	2	1	25-70	25-70	70	70	Yes	No

Basic information

Type	Bellows Type	Application	Standard / Servo Motor / Stepping Motor	Feature	High Torsional Rigidity / High Torque / High Accuracy / High Durability / No Backlash / Low Moment of Inertia
Bellows Part Material	Stainless Steel

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61Suggestion of an applicable part number.

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Basic Attributes

Shaft Bore Dia. (machined) D1(mm)
[10-25.4/0.1mm Unit(s)][10-70/1mm Unit(s)]
Clear
Shaft Bore Dia. (machined) D2(mm)
[10-25.4/0.1mm Unit(s)][10-70/1mm Unit(s)]
Clear
Outer Dia. A(mm)
45

56

66

82

90

110

122
Clear
Length L(mm)
58

66

67

77

78

83

89

94

100

105

111
Clear
Allowable Torque(Nm)
18

30

60

80

150

200

300

500
Clear
Max. Rotational Speed(r/min)
5000

6000

6400

6900

8700

10300

12800
Clear
Allowable Lateral Misalignment(mm)
0.15

0.2

0.25
Clear
Allowable Angular Misalignment(deg)
1.5

2
Clear
Applicable Range (Bore 1)
10-30

10-25,4

10.25-4

12-44

12-35

14-44

16-48

20-60

25-70
Clear
Applicable Range (Bore 2)
10-30

10-25,4

10.25-4

12-44

12-35

14-44

16-48

20-60

25-70
Clear
Maximum D1 Bore Size with Keyway
25.4

30

35

44

47

60

70
Clear
Maximum D2 Bore Size with Keyway
25.4

30

35

44

47

60

70
Clear
Keyway D1
- No
- Yes
Clear
Keyway D2
- No
- Yes
Clear
Type
- KB4C
Clear
Filter by CAD data type
- 2D
- 3D
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