ISO 6431 Air Cylinders | McMaster-Carr

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About Air Cylinders

Select a cylinder, prolong its life by reducing wear, and trigger automated processes with sensors.

Enclosed-Body Load Responsive Cushion Air Cylinders

Ensure the correct cushioning, even with changing loads. These cylinders have self-adjusting cushions that automatically compensate for changes in load and speed. They have an extruded-aluminum body so there's no open spaces for debris to collect. All have a magnetic piston so you can use them with sensors (sold separately) to activate relays and controllers.

For technical drawings and 3-D models, click on a part number.

Sensor-Ready Air Cylinders

Lg., mm					Air Inlet
Stroke	Retracted	Extended	Force @ 100 psi, lbs.	Body Material	Pipe Size	Thread Type	Gender	Specifications Met		Each
32 mm Bore Size (45 mm Wd.)
25	170.1	195.1	114	Aluminum	1/8	BSPP	Female	ISO 15552, ISO 6431	00000000	0000000
50	195.1	245.1	114	Aluminum	1/8	BSPP	Female	ISO 15552, ISO 6431	00000000	000000
75	220.1	295.1	114	Aluminum	1/8	BSPP	Female	ISO 15552, ISO 6431	00000000	000000
100	245.1	345.1	114	Aluminum	1/8	BSPP	Female	ISO 15552, ISO 6431	00000000	000000
125	270.1	395.1	114	Aluminum	1/8	BSPP	Female	ISO 15552, ISO 6431	00000000	000000
150	295.1	445.1	114	Aluminum	1/8	BSPP	Female	ISO 15552, ISO 6431	00000000	000000
175	320.1	495.1	114	Aluminum	1/8	BSPP	Female	ISO 15552, ISO 6431	00000000	000000
200	345.1	545.1	114	Aluminum	1/8	BSPP	Female	ISO 15552, ISO 6431	00000000	000000
275	420.1	695.1	114	Aluminum	1/8	BSPP	Female	ISO 15552, ISO 6431	00000000	000000
350	495.1	845.1	114	Aluminum	1/8	BSPP	Female	ISO 15552, ISO 6431	00000000	000000
400	545.1	945.1	114	Aluminum	1/8	BSPP	Female	ISO 15552, ISO 6431	00000000	000000
500	645.1	1,145.1	114	Aluminum	1/8	BSPP	Female	ISO 15552, ISO 6431	00000000	000000
40 mm Bore Size (54 mm Wd.)
25	186.9	211.9	178	Aluminum	1/4	BSPP	Female	ISO 15552, ISO 6431	00000000	000000
50	211.9	261.9	178	Aluminum	1/4	BSPP	Female	ISO 15552, ISO 6431	00000000	000000
75	236.9	311.9	178	Aluminum	1/4	BSPP	Female	ISO 15552, ISO 6431	00000000	000000
100	261.9	361.9	178	Aluminum	1/4	BSPP	Female	ISO 15552, ISO 6431	00000000	000000
125	286.9	411.9	178	Aluminum	1/4	BSPP	Female	ISO 15552, ISO 6431	00000000	000000
150	311.9	461.9	178	Aluminum	1/4	BSPP	Female	ISO 15552, ISO 6431	00000000	000000
175	336.9	511.9	178	Aluminum	1/4	BSPP	Female	ISO 15552, ISO 6431	00000000	000000
200	361.9	561.9	178	Aluminum	1/4	BSPP	Female	ISO 15552, ISO 6431	00000000	000000
250	411.9	661.9	178	Aluminum	1/4	BSPP	Female	ISO 15552, ISO 6431	00000000	000000
300	461.9	761.9	178	Aluminum	1/4	BSPP	Female	ISO 15552, ISO 6431	00000000	000000
350	511.9	861.9	178	Aluminum	1/4	BSPP	Female	ISO 15552, ISO 6431	00000000	000000
400	561.9	961.9	178	Aluminum	1/4	BSPP	Female	ISO 15552, ISO 6431	00000000	000000
450	611.9	1,061.9	178	Aluminum	1/4	BSPP	Female	ISO 15552, ISO 6431	00000000	000000
500	661.9	1,161.9	178	Aluminum	1/4	BSPP	Female	ISO 15552, ISO 6431	00000000	000000
63 mm Bore Size (75 mm Wd.)
50	243.1	293.1	441	Aluminum	3/8	BSPP	Female	ISO 15552, ISO 6431	00000000	000000
75	268.1	343.1	441	Aluminum	3/8	BSPP	Female	ISO 15552, ISO 6431	00000000	000000
100	293.1	393.1	441	Aluminum	3/8	BSPP	Female	ISO 15552, ISO 6431	00000000	000000
125	318.1	443.1	441	Aluminum	3/8	BSPP	Female	ISO 15552, ISO 6431	00000000	000000
150	343.1	493.1	441	Aluminum	3/8	BSPP	Female	ISO 15552, ISO 6431	00000000	000000
175	368.1	543.1	441	Aluminum	3/8	BSPP	Female	ISO 15552, ISO 6431	00000000	000000
200	393.1	593.1	441	Aluminum	3/8	BSPP	Female	ISO 15552, ISO 6431	00000000	000000
250	443.1	693.1	441	Aluminum	3/8	BSPP	Female	ISO 15552, ISO 6431	00000000	000000
300	493.1	793.1	441	Aluminum	3/8	BSPP	Female	ISO 15552, ISO 6431	00000000	000000
325	518.1	843.1	441	Aluminum	3/8	BSPP	Female	ISO 15552, ISO 6431	00000000	000000
400	593.1	993.1	441	Aluminum	3/8	BSPP	Female	ISO 15552, ISO 6431	00000000	000000
500	693.1	1,193.1	441	Aluminum	3/8	BSPP	Female	ISO 15552, ISO 6431	00000000	000000

Pivot Brackets

						Mounting Holes
For Bore Size, mm	Pin Hole Dia., mm	Wd., mm	Ht., mm	Dp., mm	Base Plate Thick., mm	No. of	Dia., mm	Ctr.-to-Ctr., mm	Mounting Hardware Included	Material	Includes		Each
32	10	45	45	37	5.5	4	6.6	32.5	Yes	Aluminum	Four Bolts	00000000	000000
40	12	54	54	42	5.5	4	6.6	38	Yes	Aluminum	Four Bolts	00000000	00000
63	16	75	75	55	6.5	4	9	56.5	Yes	Aluminum	Four Bolts	00000000	000000

Clevis Brackets with Pin

	Pin								Mounting Holes
For Bore Size, mm	Dia., mm	Lg., mm	Material	Wd., mm	Ht., mm	Dp., mm	Jaw Opening Wd., mm	Base Plate Thick., mm	No. of	Dia., mm	Ctr.-to-Ctr., mm	Mounting Hardware Included	Material	Includes		Each
32	10	41	Steel	45	45	32	14	5.5	4	6.6	32.5	Yes	Aluminum	Four Bolts, Retaining Clip	00000000	000000
40	12	48	Steel	54	54	37	16	5.5	4	6.6	38	Yes	Aluminum	Four Bolts, Retaining Clip	00000000	00000
63	16	60	Steel	75	75	48	21	6.5	4	9	56.5	Yes	Aluminum	Four Bolts, Retaining Clip	00000000	00000

Rod Clevis with Pin

	Pin						Shank		Thread
For Bore Size, mm	Dia., mm	Lg., mm	Material	Lg., mm	Ht., mm	Jaw Opening Wd., mm	Center Lg., mm	Gender	Size	Pitch, mm	Lg., mm	No. of Mounting Holes	Mounting Hardware Included	Material	Includes	Specifications Met		Each
32	10	26	Steel	52	20	10	40	Female	M10	1.25	20	4	Yes	Galvanized Steel	Nut	DIN 71752, ISO 8140	00000000	000000
40	12	31	Steel	62	24	12	48	Female	M12	1.25	24	4	Yes	Galvanized Steel	Nut	DIN 71752, ISO 8140	00000000	00000
63	16	39	Steel	83	32	16	64	Female	M16	1.5	32	4	Yes	Galvanized Steel	Nut	DIN 71752, ISO 8140	00000000	00000