Providing the better products faster and cheaper

Bore	Amount of stretch mm	Number of peaks	Bowler mm	Pitch mm	Thickness of Plate mm	Interplanar mm	Maximum allowable working pressure MPa	Spring constant N/mm・peak
50A (2B)	±5 10 15 20	6 12 17 23	10	10	0.6	160 220 270 330	0.9	2000
65A (2・1/2B)	±5 10 15 20	4 7 10 14	15	15	0.8	160 205 250 310	0.8	1830
80A (3B)	±5 10 15 20	4 7 10 14	15	15	0.8	160 205 250 310	0.8	2091
100A (4B)	±5 10 15 20 25	3 5 8 10 13	20	20	1	160 200 260 300 360	0.7	2222
125A (5B)	±10 15 20 25 30	3 4 5 7 8	30	30	1.2	220 250 280 340 370	0.45	1434
150A (6B)	±10 15 20 25 30	3 4 5 7 8	30	30	1.2	220 250 280 340 370	0.45	1655
200A (8B)	±10 15 20 25 30	3 4 5 7 8	30	30	1.2	240 270 300 360 390	0.45	2087
250A (10B)	±10 15 20 25 30	3 4 5 7 8	30	30	1.2	240 270 300 360 390	0.45	2520
300A (12B)	±10 15 20 25 30	3 4 5 7 8	30	30	1.2	240 270 300 360 390	0.45	2953
350A (14B)	±10 20 25 30 35	2 4 5 6 7	40	40	1.5	220 300 340 380 420	0.45	2763
400A (16B)	±10 20 25 30 35	2 4 5 6 7	40	40	1.5	220 300 340 380 420	0.45	3119
450A (18B)	±10 20 25 30 35	2 4 5 6 7	40	40	1.5	220 300 340 380 420	0.45	3371
500A (20B)	±10 25 35 45 54	2 3 4 5 6	50	50	1.5	240 290 340 390 440	0.29	1944
550A (22B)	±10 25 35 45 54	2 3 4 5 6	50	50	1.5	240 290 340 390 440	0.29	2127
600A (24B)	±10 25 35 45 54	2 3 4 5 6	50	50	1.5	240 290 340 390 440	0.29	2310
650A (26B)	±10 25 35 45 54	2 3 4 5 6	50	50	1.5	240 290 340 390 440	0.29	2489
700A (28B)	±25 30 50 65 78	2 3 4 5 6	60	60	1.5	260 320 380 440 500	0.21	1567
750A (30B)	±25 30 50 65 78	2 3 4 5 6	60	60	1.5	260 320 380 440 500	0.21	1673

Bore	Amount of stretch mm	Number of peaks	Bowler mm	Pitch mm	Thickness of Plate mm	Interplanar mm	Maximum allowable working pressure MPa	Spring constant N/mm・peak
50A (2B)	±8 15 20 30	4 7 10 14	15	17	0.6	300 350 400 500	3.0	596
65A (3B)	±5 10 15 20	4 7 10 14	15	17	0.8	300 350 400 500	3.0	1715
80A (3B)	±5 10 15 20	4 7 10 14	15	17	0.8	300 350 400 500	3.0	1966
100A (4B)	±5 10 15 20	3 5 8 10	20	20	1	300 350 400 450	3.0	2222
125A (5B)	±10 15 20 25	3 4 5 7	30	30	1.2	350 400 450 500	3.0	1434
150A (6B)	±10 15 20 25	3 4 5 7	30	30	1.2	350 400 450 500	3.0	1655
200A (8B)	±10 15 20 25	3 4 5 7	30	30	1.2	350 400 450 500	3.0	2087
250A (10B)	±10 15 20 25	2 3 4 5	40	40	1.5	400 450 500 550	2.5	2148
300A (12B)	±10 15 20 25	2 3 4 5	40	40	1.5	400 450 500 550	2.5	2504
350A (14B)	±10 15 20 25	2 3 4 5	40	40	1.5	400 450 500 550	2.5	2763
400A (16B)	±20 25 30 35	4 5 6 7	40	40	1.5	500 550 600 650	2.5	3119
450A (18B)	±20 25 30 35	4 5 6 7	40	40	1.5	500 550 600 650	2.5	3371
500A (20B)	±25 35 45 50	3 4 5 6	50	50	1.5	550 600 650 700	2.0	1944
550A (22B)	±25 35 45 50	3 4 5 6	50	50	1.5	550 600 650 700	2.0	2127
600A (24B)	±25 35 45 50	3 4 5 6	50	50	1.5	550 600 650 700	2.0	2310

Bellows life cycles than 3000 Internal pressure of 0.1 to 0.3MPa 19000kgf/mm² modulus

Name Diameter Ａ	Dimensions in mm bellows				Can be produced Number of peaks	Spring constant Ｎ/mm・peak	1 Mt per mm2 axial displacement
	Thickness of Plate	Bowler	Pitch	Internal Diameter
20	0.3	4.7	6	27	32	1017	0.45
25	0.3	5.45	6.3	33.5	32	839	0.55
32	0.3	6.7	7	42	32	592	0.75
40	0.35	6.9	7.5	47.5	32	943	0.75
50	0.35	7.4	8.5	59.5	32	913	0.9
65	0.4	9.6	9.5	75	25	849	1.2
80	0.4	10.6	10.5	88	25	734	1.4
100	0.4	12.1	10.5	113	25	668	1.6
125	0.5	11	12	138	32	1845	1.4
150	0.5	13	15	164	24	1290	1.8
200	0.5	13	15	216	24	1666	1.8
250	0.5	16	18	268	23	1122	2.7
300	0.5	18	20	317	21	934	3.5
350	0.6	18	20	356	21	1803	3
400	0.6	23	25	406	17	1002	4.7
450	0.6	23	25	456	17	1118	4.7
500	0.7	28	30	507	14	1107	5.9
550	0.7	28	30	558	14	1213	5.9
600	0.7	28	30	609	14	1318	5.9
650	0.7	32	35	660	12	949	7.8
700	0.8	32	35	710	12	1520	7
750	0.8	32	35	762	12	1626	7
800	0.8	36	40	812	9	930	8.7
850	0.8	36	40	864	9	1284	8.7
900	0.8	36	40	914	9	1929	8.7
950	0.8	40	45	962	8	1035	10.5
1000	0.8	40	45	1015	8	1090	10.5

Name Diameter	Maximum transverse displacement mm nominal diameter
	50	100	150	200	250	300	350	400
ND	The total length of ND universal formula fitting bellows type expansion
80	700	1000	1400	1700	2100	2400	2700	3100
100	700	1100	1400	1800	2100	2500	2800	3200
125	800	1200	1600	2000	2300	2700	3100	3500
150	800	1200	1600	2000	2400	2800	3200	3600
200	900	1300	1700	2100	2500	2900	3300	3700
250	1000	1400	1800	2200	2600	3000	3300	3700
300	1000	1400	1800	2200	2600	3000	3300	3700
350	1100	1500	1900	2300	2700	3100	3400	3800
400	1200	1600	2100	2400	2800	3200	3600	4000
450	1200	1700	2200	2600	3100	3500	4000	4500
500	1300	1800	2300	2800	3300	3800	4300	4800
550	1300	1900	2500	3000	3600	4100	4700	5300
600	1400	1900	2500	3000	3600	4100	4700	5300
650	1400	1900	2500	3000	3600	4100	4700	5300
700	1400	2000	2500	3000	3600	4100	4700	5300
750	1500	2100	2600	3100	3700	4200	4700	5300
800	1500	2100	2700	3200	3800	4300	4800	5400
900	1600	2200	2800	3400	4000	4600	5200	5800
1000	1800	2600	3300	4100	4800	5500	6300	7000
1100	1900	2800	3600	4400	5200	6000	6800	7600
1200	2000	2900	3800	4700	5600	6500	7300	8200
1300	2100	3100	4000	5000	5900	6900	7900	8800
1400	2200	3200	4300	5300	6300	7400	8400	9400
1500	2200	3400	4500	5600	6700	7600	8900	10000

Super 10

Name Diameter (A)	Internal Diameter （mm）	Bowler （mm）	Pitch （mm）	Thickness (two layers) Inner layer / outer	number of peaks Length:mm	Amount of axial stretch mm	Reaction force N/mm	Lot tie bolt
50	59.5	6.5	6.5	0.25 0.25	18 150	15	39	2-M12
65	75	6.5	7	0.25 0.25	16 150	14	44	2-M12
80	88	7.5	7	0.3 0.3	16 150	14	44	3-M12
100	113	7.5	7	0.3 0.3	16 150	14	55	3-M12
125	138	9.5	9	0.4 0.4	12 150	12	132	3-M12
150	163.5	9.5	8.5	0.4 0.4	12 150	13	304	3-M16
200	214.7	13	12.5	0.5 0.5	12 200	19	294	4-M16
250	265.8	13	12.5	0.5 0.5	12 200	19	360	4-M20
300	316.9	13	12.5	0.5 0.5	12 200	19	425	4-M24

Super 20

Name Diameter (A)	Bore （mm）	Bowler （mm）	Pitch （mm）	Sheet thickness (mm) Inner layer / outer	Number of peaks Length:mm	Axial direction Amount of stretch mm	Reaction force N/mm	Lot tie bolt
50	59.1	6.5	10	0.4 0.3	7 110	6	240	3-M12
65	74.9	7	12	0.4 0.4	6 110	4.5	203	3-M12
80	87.3	9	11	0.5 0.5	6 110	5	393	3-M16
100	112.5	9	14	0.5 0.5	7 150	7	297	3-M20
125	137.5	9	14	0.5 0.5	7 150	7	544	3-M24
150	162.8	11	15	0.6 0.6	6 150	7	569	3-M24
200	214.1	11	15	0.6 0.6	9 200	7	487	4-M24
250	264.8	12	17	0.7 0.7	8 200	10	621	4-M30
300	315.7	12	18	0.7 0.7	7 200	9	863	4-M36

Standard (internal pressure of 0.1 to 0.3MPa)

Bore	Thickness of Plate	Internal Diameter	Bowler	Pitch	Amount of stretch Mt per 1 (mm)	Spring constant (N/mm・peak)
20A	0.3	27.0	4.7	6.0	0.45	1017.0
25A	0.3	33.5	5.5	6.3	0.55	839.0
32A	0.3	42.0	6.7	7.0	0.75	592.0
40A	0.35	47.5	6.9	7.5	0.75	943.0
50A	0.35	59.5	7.4	8.5	0.90	913.0
65A	0.4	75.0	9.6	9.5	1.2	849.0
80A	0.4	88.0	10.6	10.5	1.4	734.0
100A	0.4	113.0	12.1	10.5	1.6	668.0
125A	0.5	140.5	11.0	12.0	1.4	1818.9
150A	0.5	166.0	13.0	15.0	2.0	1264.6
200A	0.5	218.3	13.0	15.0	2.0	1632.1
250A	0.5	269.0	16.0	18.0	2.8	1091.5
300A	0.5	320.5	18.0	20.0	3.3	915.7

Flexible (0.1MPa pressure force)

Bore	Thickness of Plate	Internal Diameter	Bowler	Pitch	Amount of stretch Mt per 1 (mm)	spring constant (Mt N / mm ·)
20A	0.2	28.6	4.7	4.0	0.60	373.3
25A	0.2	35.6	5.5	4.0	0.75	310.3
32A	0.2	44.1	6.7	5.0	1.10	209.1
40A	0.2	50.1	6.9	5.0	1.15	217.8
50A	0.2	62.1	7.4	5.0	1.25	222.6
65A	0.2	78.4	9.0	6.5	1.85	150.3
80A	0.3	90.9	10.0	6.5	1.55	450.4
100A	0.3	116.2	10.0	7.5	1.65	524.3
125A	0.3	141.9	10.0	7.5	1.65	630.6
150A	0.3	167.4	11.0	7.5	1.90	583.3
200A	0.3	218.7	11.0	7.5	1.90	750.5
250A	0.3	270.4	13.0	10.0	2.70	527.8
300A	0.3	319.9	13.0	10.0	2.70	619.8

Bore	Amount of stretch mm	Number of peaks	Bowler mm	Pitch mm	Thickness of Plate mm	Interplanar mm	Maximum allowable working pressure MPa	Spring constant N/mm・peak
50A (2B)	±8 15 20 30	4 7 10 14	15	17	0.6	300 350 400 500	3.0	596
65A (3B)	±5 10 15 20	4 7 10 14	15	17	0.8	300 350 400 500	3.0	1715
80A (3B)	±5 10 15 20	4 7 10 14	15	17	0.8	300 350 400 500	3.0	1966
100A (4B)	±5 10 15 20	3 5 8 10	20	20	1	300 350 400 450	3.0	2222
125A (5B)	±10 15 20 25	3 4 5 7	30	30	1.2	350 400 450 500	3.0	1434
150A (6B)	±10 15 20 25	3 4 5 7	30	30	1.2	350 400 450 500	3.0	1655
200A (8B)	±10 15 20 25	3 4 5 7	30	30	1.2	350 400 450 500	3.0	2087
250A (10B)	±10 15 20 25	2 3 4 5	40	40	1.5	400 450 500 550	2.5	2148
300A (12B)	±10 15 20 25	2 3 4 5	40	40	1.5	400 450 500 550	2.5	2504
350A (14B)	±10 15 20 25	2 3 4 5	40	40	1.5	400 450 500 550	2.5	2763
400A (16B)	±20 25 30 35	4 5 6 7	40	40	1.5	500 550 600 650	2.5	3119
450A (18B)	±20 25 30 35	4 5 6 7	40	40	1.5	500 550 600 650	2.5	3371
500A (20B)	±25 35 45 50	3 4 5 6	50	50	1.5	550 600 650 700	2.0	1944
550A (22B)	±25 35 45 50	3 4 5 6	50	50	1.5	550 600 650 700	2.0	2127
600A (24B)	±25 35 45 50	3 4 5 6	50	50	1.5	550 600 650 700	2.0	2310

Round Corner stretch volume (unit: mm)

t \ HxP	50×50	75×70	100×80
SUS　　1.0	13.5	－	－
SUS　　1.2	11.5	－	－
SUS　　1.5	－	20	32
SUS　　2.0	－	－	27
Oesten1.6	－	18	30
Oesten2.3	－	13	21

Bellows shape and thickness dimensions (Unit: mm)

Stainless steel　SUS304-316					Steel Oesten　No.1-No.2
Thickness of Plate mm	pitch angle of the mountain	Pitch	Number of peaks	Spring constant N/mm・peak	Sheet thickness mm	The height of the peaks	Pitch	Number of peaks	Spring constant N/mm・peak
1.0	50	50	6	661.7	1.6	75	70	5	1163.6
1.2	50	50	6	1143.3	1.6	100	80	4	757.5
1.5	75	70	5	958.8	2.3	75	70	5	3456.4
1.5	100	80	4	624.2	2.3	100	80	4	2250.0
2.0	100	80	4	1479.4	－	－	－	－	－

(Spring constant is produced by the smallest possible diameter each)

Bowler of the bellows and the R corner (unit: mm)

The height of the peak	Where the R-4 pcs.	The minimum diameter can be produced
50	Radius　180	□　　500
75	Radius　200	□　　700
100	Radius　295	□　1000

The bellows material stainless steel, steel Oesten, and acid resistant steel, etc..

The amount of U-shaped bellows stretch

t H	50	75	100
1.2	11.5mm	25.6mm	40mm
1.5	9.2mm	20.6mm	36mm
Pitch	50	75	100
Dashan maximum number	3	3	3

The amount of elasticity is around 1 Mt

Bellows volume V-stretch

t H	50	75	100	125
0.8	12mm	－	－	－
1	9mm	22mm	30mm	36mm
1.2	8mm	18mm	30mm	36mm
1.5	6mm	14mm	26mm	36mm
2	4mm	11mm	19mm	30mm
Pitch	20	30	35	40
Dashan maximum number	10	8	6	4

The amount of elasticity is around 1 Mt

BellowsMaterial
ＳＵＳ３０４、３１６、３１６Ｌ、３１０Ｓ、３２１
Hastelloy, Inconel, Oesten

Designation	ΦID （mm)	ΦG （mm)	L (mm)	tolerance allowable displacement				when mounting dimensions
				Elongation (mm)	Compression （mm)	Eccentricity （mm)	Angular displacement	Elongation （mm)	Compression （mm)	Eccentricity（mm)	Angular displacement
20A	25	57	81	10	13	7	10	2	2	2	2
25A	25	65	81	10	13	7	10	2	2	2	2
32A	36	73	81	10	13	10	10	2	2	2	2
40A	36	73	81	10	13	10	10	2	2	2	2
50A	48	87	122	13	16	10	10	2	2	2	2
65A	62	108	122	13	16	10	10	2	2	2	2
80A	72	118	122	13	16	10	10	2	2	2	2
100A	98	150	122	13	16	10	10	2	2	2	2
125A	124	174	143	13	16	10	10	2	2	2	2
150A	149	206	166	13	16	10	10	2	2	2	2
200A	199	257	182	13	16	10	10	2	2	2	2
250A	247	314	194	13	16	10	10	2	2	2	2
300A	300	375	200	13	16	10	10	2	2	2	2
350A	330	410	200	13	16	10	10	2	2	2	2

● Please use each displacement in the range of allowable displacement.
● Mounting dimensions tolerance is included in allowable displacement.
(Production + displacement = displacement allowable displacement when mounted)
● listed in the table displacement in the complex case because of the displacement indicates the displacement of a single case can take a correction.
For information about correcting the "Handling Precautions" please see.

Designation	ΦID （mm)	ΦG （mm)	L (mm)	tolerance allowable displacement				when mounting dimensions
				Elongation (mm)	Compression （mm)	Eccentricity （mm)	Angular displacement	Elongation （mm)	Compression （mm)	Eccentricity（mm)	Angular displacement
20A	24	57	150	10	15	15	15	3	5	4	5
25A	27	65	150	10	15	15	15	3	5	4	5
32A	37	71	150	10	20	20	15	3	5	5	5
40A	37	71	150	10	20	20	15	3	5	5	5
50A	44	87	150	10	20	20	15	3	5	5	5
65A	60	106	150	10	20	20	15	3	5	5	5
80A	73	115	150	10	20	20	15	3	5	5	5
100A	95	149	150	15	20	20	15	3	5	5	5
125A	120	174	150	15	20	20	15	3	5	5	5
150A	145	210	150	15	20	20	15	3	5	5	5
			200	15	25	25	15	3	5	5	5
200A	189	26	150	15	20	20	15	3	5	5	5
			200	15	25	25	15	3	5	5	5
250A	239	320	200	15	25	25	15	3	5	5	5
300A	291	367	200	15	25	25	15	3	5	5	5
350A	327	367	200	15	25	25	15	3	5	5	5

● Please use each displacement in the range of allowable displacement.
● Mounting dimensions tolerance is included in allowable displacement.
(Production + displacement = displacement allowable displacement when mounted)
● listed in the table displacement in the complex case because of the displacement indicates the displacement of a single case can take a correction.
For information about correcting the "Handling Precautions" please see.

• TOP
• Message from President & CEO
• Company Profile
• Facility Information
• Other performance tester

• Product Information
• Flexible metal hose
• Fluorocarbon Polymer Flexible Hose
• Bellows Expansion Joint

• What's Flexible Tube ?
• Inquiry
• Site Map
• Privacy Policy