Air Shock Absorbers | McMaster-Carr

Isolate vibration and absorb shock from moving equipment, even with changing loads. Also for leveling and lifting, use compressed air to adjust air springs to the height and force required for your application. They’re often used with vibratory screen and conveyors; loading and transfer stations; and sensitive testing and measuring equipment. Do not extend beyond height at full stroke.

Miniature-Sleeve Air Spring

									Air Inlet			Mount. Hole		Mount. Stud
Ht. @ Full Stroke	Compressed Ht.	Stroke Lg.	Extended Ht.	Full Stroke Lifting Force @ Pressure	Beginning Stroke Lifting Force @ Pressure	OD @ Full Stroke	Temp. Range, ° F	Air Spring Material	Thread Type	Gender	Pipe Size	Thread Size	Dp.	Thread Size	Lg.		Each
4.6"	1.5"	2.1"	3.6"	10 lbf @ 20 psi 40 lbf @ 60 psi 120 lbf @ 100 psi	120 lbf @ 20 psi 360 lbf @ 60 psi 600 lbf @ 100 psi	3.6"	-20 to 135	Neoprene	NPTF	Female	1/8	5/16"-18	7/16"	5/8"-11	1"	0000000	000000

Sleeve Air Spring

									Air Inlet			Mount. Hole		Mount. Stud
Ht. @ Full Stroke	Compressed Ht.	Stroke Lg.	Extended Ht.	Full Stroke Lifting Force @ Pressure	Beginning Stroke Lifting Force @ Pressure	OD @ Full Stroke	Temp. Range, ° F	Air Spring Material	Thread Type	Gender	Pipe Size	Thread Size	Dp.	Thread Size	Lg.		Each
6.88"	2.2"	4"	6.25"	140 lbf @ 20 psi 320 lbf @ 60 psi 560 lbf @ 100 psi	250 lbf @ 20 psi 700 lbf @ 60 psi 1,250 lbf @ 100 psi	5.6"	-20 to 135	Neoprene	NPTF	Female	1/8	3/8"-16	1/2"	3/4"-16	0.63"	0000000	0000000
7.73"	2.2"	4.9"	7.1"	80 lbf @ 20 psi 180 lbf @ 60 psi 310 lbf @ 100 psi	340 lbf @ 20 psi 700 lbf @ 60 psi 1,100 lbf @ 100 psi	4.6"	-20 to 135	Neoprene	NPTF	Female	1/8	3/8"-16	1/2"	3/4"-16	0.63"	0000000	00000
8.72"	3.6"	4.4"	8"	40 lbf @ 20 psi 60 lbf @ 60 psi 110 lbf @ 100 psi	60 lbf @ 20 psi 200 lbf @ 60 psi 360 lbf @ 100 psi	3.25"	-20 to 135	Neoprene	NPTF	Female	1/8	1/2"-13	5/8"	3/4"-16	0.72"	0000000	00000
10.21"	4"	5.5"	9.5"	160 lbf @ 20 psi 500 lbf @ 60 psi 800 lbf @ 100 psi	190 lbf @ 20 psi 540 lbf @ 60 psi 950 lbf @ 100 psi	5.7"	-20 to 135	Neoprene	NPTF	Female	1/8	1/2"-13	5/8"	3/4"-16	0.71"	0000000	00000
11.21"	4"	6.5"	10.5"	140 lbf @ 20 psi 340 lbf @ 60 psi 540 lbf @ 100 psi	170 lbf @ 20 psi 520 lbf @ 60 psi 850 lbf @ 100 psi	4.6"	-20 to 135	Neoprene	NPTF	Female	1/8	1/2"-13	5/8"	3/4"-16	0.71"	0000000	00000
11.21"	4"	6.5"	10.5"	180 lbf @ 20 psi 460 lbf @ 60 psi 750 lbf @ 100 psi	230 lbf @ 20 psi 660 lbf @ 60 psi 1,100 lbf @ 100 psi	5.6"	-20 to 135	Neoprene	NPTF	Female	1/8	1/2"-13	5/8"	3/4"-16	0.71"	0000000	00000
12"	4.1"	6.8"	10.9"	240 lbf @ 20 psi 700 lbf @ 60 psi 1,200 lbf @ 100 psi	420 lbf @ 20 psi 1,100 lbf @ 60 psi 2,000 lbf @ 100 psi	7"	-20 to 135	Neoprene	NPTF	Female	1/8	—	—	—	—	0000000	000000

Single-Tire Air Spring

									Air Inlet			Mount. Hole
Ht. @ Full Stroke	Compressed Ht.	Stroke Lg.	Extended Ht.	Full Stroke Lifting Force @ Pressure	Beginning Stroke Lifting Force @ Pressure	OD @ Full Stroke	Temp. Range, ° F	Air Spring Material	Thread Type	Gender	Pipe Size	Ctr.-to-Ctr.	Thread Size	Dp.		Each
3.8"	1.8"	2"	3.8"	60 lbf @ 20 psi 280 lbf @ 60 psi 560 lbf @ 100 psi	280 lbf @ 20 psi 900 lbf @ 60 psi 1,500 lbf @ 100 psi	5.7"	-20 to 135	Neoprene	NPTF	Female	1/4	1 3/4"	3/8"-16	5/8"	0000000	000000
4.8"	1.8"	3"	4.8"	30 lbf @ 20 psi 260 lbf @ 60 psi 520 lbf @ 100 psi	320 lbf @ 20 psi 950 lbf @ 60 psi 1,600 lbf @ 100 psi	6"	-20 to 135	Neoprene	NPTF	Female	1/4	1 3/4"	3/8"-16	5/8"	0000000	000000
4.8"	2"	2.8"	4.8"	60 lbf @ 20 psi 440 lbf @ 60 psi 850 lbf @ 100 psi	420 lbf @ 20 psi 1,200 lbf @ 60 psi 2,000 lbf @ 100 psi	6.5"	-20 to 135	Neoprene	NPTF	Female	1/4	1 3/4"	3/8"-16	5/8"	0000000	000000
5.2"	2"	3.2"	5.2"	100 lbf @ 20 psi 350 lbf @ 60 psi 850 lbf @ 100 psi	500 lbf @ 20 psi 1,500 lbf @ 60 psi 2,600 lbf @ 100 psi	7.7"	-20 to 135	Neoprene	NPTF	Female	1/4	1 3/4"	3/8"-16	5/8"	0000000	000000
5.2"	3.2"	2"	5.9"	280 lbf @ 20 psi 850 lbf @ 60 psi 1,500 lbf @ 100 psi	900 lbf @ 20 psi 2,900 lbf @ 60 psi 4,900 lbf @ 100 psi	11"	-56 to 135	Natural Rubber	NPTF	Female	1/4	3 1/2"	3/8"-16	5/8"	0000000	000000
5.3"	2"	3.3"	5.3"	100 lbf @ 20 psi 550 lbf @ 60 psi 1,100 lbf @ 100 psi	660 lbf @ 20 psi 2,100 lbf @ 60 psi 3,600 lbf @ 100 psi	8.7"	-20 to 135	Neoprene	NPTF	Female	1/4	2 3/4"	3/8"-16	5/8"	0000000	000000
5.3"	2.3"	3"	5.9"	280 lbf @ 20 psi 850 lbf @ 60 psi 1,500 lbf @ 100 psi	1,100 lbf @ 20 psi 3,300 lbf @ 60 psi 5,600 lbf @ 100 psi	11"	-56 to 135	Natural Rubber	NPTF	Female	1/4	3 1/2"	3/8"-16	5/8"	0000000	000000
5.4"	2"	3.4"	7.1"	10 lbf @ 20 psi 300 lbf @ 60 psi 750 lbf @ 100 psi	750 lbf @ 20 psi 1,800 lbf @ 60 psi 3,000 lbf @ 100 psi	7"	-20 to 135	Neoprene	NPTF	Female	1/4	1 3/4"	3/8"-16	5/8"	0000000	000000
5.6"	2.6"	3"	7.2"	440 lbf @ 20 psi 1,800 lbf @ 60 psi 3,600 lbf @ 100 psi	1,700 lbf @ 20 psi 5,100 lbf @ 60 psi 8,800 lbf @ 100 psi	13.2"	-56 to 135	Natural Rubber	NPTF	Female	1/4	6.2"	3/8"-16	5/8"	0000000	000000

Air Valves

		Each
Inflation Valve	0000000	000000

Double-Tire Air Spring

									Air Inlet			Mount. Hole			Mount. Stud
Ht. @ Full Stroke	Compressed Ht.	Stroke Lg.	Extended Ht.	Full Stroke Lifting Force @ Pressure	Beginning Stroke Lifting Force @ Pressure	OD @ Full Stroke	Temp. Range, ° F	Air Spring Material	Thread Type	Gender	Pipe Size	Ctr.-to-Ctr.	Thread Size	Dp.	Thread Size	Lg.		Each
7.1"	2.8"	4.3"	7.7"	0 lbf @ 20 psi 220 lbf @ 60 psi 580 lbf @ 100 psi	750 lbf @ 20 psi 1,700 lbf @ 60 psi 2,800 lbf @ 100 psi	6.5"	-20 to 135	Neoprene	NPTF	Female	1/4	1 3/4"	3/8"-16	5/8"	—	—	0000000	0000000
9 1/2"	2.9"	6.6"	10.1"	30 lbf @ 20 psi 450 lbf @ 60 psi 1,000 lbf @ 100 psi	1,200 lbf @ 20 psi 3,100 lbf @ 60 psi 5,000 lbf @ 100 psi	8.8"	-20 to 135	Neoprene	NPTF	Female	1/4	2 3/4"	3/8"-16	5/8"	—	—	0000000	000000
9 1/2"	3.2"	6.3"	10.8"	20 lbf @ 20 psi 400 lbf @ 60 psi 1,100 lbf @ 100 psi	1,000 lbf @ 20 psi 3,300 lbf @ 60 psi 5,700 lbf @ 100 psi	10.3"	-56 to 135	Natural Rubber	NPTF	Female	1/4	3 1/2"	3/8"-16	5/8"	—	—	0000000	000000
9 1/2"	3.4"	6.1"	11.1"	240 lbf @ 20 psi 1,200 lbf @ 60 psi 2,700 lbf @ 100 psi	1,600 lbf @ 20 psi 5,500 lbf @ 60 psi 9,400 lbf @ 100 psi	13"	-56 to 135	Natural Rubber	NPTF	Female	1/4	6.2"	3/8"-16	5/8"	—	—	0000000	000000
10.7"	3.5"	7.2"	12.2"	120 lbf @ 20 psi 800 lbf @ 60 psi 1,500 lbf @ 100 psi	1,250 lbf @ 20 psi 3,600 lbf @ 60 psi 6,000 lbf @ 100 psi	10.3"	-56 to 135	Natural Rubber	NPTF	Female	1/4	3 1/2"	3/8"-16	5/8"	1/2"-13	1.2"	0000000	000000
12.7"	4.3"	8.4"	14.4"	70 lbf @ 20 psi 1,150 lbf @ 60 psi 2,600 lbf @ 100 psi	1,800 lbf @ 20 psi 5,800 lbf @ 60 psi 10,000 lbf @ 100 psi	13.7"	-56 to 135	Natural Rubber	NPTF	Female	1/4	6.2"	3/8"-16	5/8"	—	—	0000000	000000

Air Valves

		Each
Inflation Valve	0000000	000000

Triple-Tire Air Spring

									Air Inlet			Mount. Hole
Ht. @ Full Stroke	Compressed Ht.	Stroke Lg.	Extended Ht.	Full Stroke Lifting Force @ Pressure	Beginning Stroke Lifting Force @ Pressure	OD @ Full Stroke	Temp. Range, ° F	Air Spring Material	Thread Type	Gender	Pipe Size	Ctr.-to-Ctr.	Thread Size	Dp.		Each
15.2"	5"	10.2"	18"	80 lbf @ 20 psi 1,900 lbf @ 60 psi 4,700 lbf @ 100 psi	2,600 lbf @ 20 psi 8,100 lbf @ 60 psi 15,000 lbf @ 100 psi	15.5"	-56 to 135	Natural Rubber	NPTF	Female	1/4	6 1/4"	3/8"-16	5/8"	0000000	0000000

Air Valves

		Each
Inflation Valve	0000000	000000

Shock-Absorbing Air Spring Vibration-Damping Mounts

Neutralize shock and vibration from your machine no matter how hard it heaves or hammers. These mounts use air pressure rather than a steel frame to support a load. That means four times the deflection and vibration control of a typical bolt-down mount. Fill them with air and stick them under heavy machinery to keep floors intact, seals tight, and fasteners secure. They’ll also soak up the vibration from floors and mounting plates that bumps optical and other precision tools out of alignment.

Threaded-Insert Mount

Image of Product. Front orientation. Vibration-Damping Mounts. Shock-Absorbing Air Spring Vibration-Damping Mounts.

Multipurpose Neoprene—Resist wear and tear well enough for most applications. They are UV resistant and won't break down when exposed to oil, grease, and gasoline, so they're a good choice for motors and pumps.

								Base			Mounting					Air Inlet
Thread Size	Cap. per Mount, lb.	Deflection @ Cap.	Shear Cap. per Mount	Deflection @ Shear Cap.	Overall Ht.	Dia.	Ht.	Lg.	Wd.	Temp. Range, ° F	Fasteners Included	No. of Holes	Hole Dia.	Hole Ctr.-to-Ctr.	Max. Pressure, psi	Thread Size	Thread Type	Base Material		Each







			Multipurpose Neoprene

			3/8"-16	100	1"	Not Rated	Not Rated	2.5"	2.88"	2"	3"	3"	-20 to 180	No	4	0.3"	2.38"	60	0.305"-32	Schrader	Aluminum	00000000	0000000


			1/2"-13	300	1"	Not Rated	Not Rated	2.45"	4.14"	1.91"	4.19"	4.19"	-20 to 180	No	4	0.3"	3.5"	60	0.305"-32	Schrader	Aluminum	00000000	000000
			1/2"-13	600	1.5"	Not Rated	Not Rated	3.5"	5"	2.94"	5.12"	5.12"	-20 to 180	No	4	0.3"	4.25"	80	0.305"-32	Schrader	Aluminum	00000000	000000
			1/2"-13	1,200	1.5"	Not Rated	Not Rated	3.5"	6.74"	2.94"	6.88"	6.88"	-20 to 180	No	4	0.3"	6"	80	0.305"-32	Schrader	Aluminum	00000000	000000
			5/8"-11	2,400	1.25"	Not Rated	Not Rated	3.5"	9.66"	2.94"	10"	10"	-20 to 180	No	4	0.56"	8.5"	80	0.305"-32	Schrader	Aluminum	00000000	000000
			5/8"-11	4,800	1.5"	Not Rated	Not Rated	3.5"	13.31"	2.94"	13.5"	13.5"	-20 to 180	No	4	0.56"	12"	80	0.305"-32	Schrader	Aluminum	00000000	000000
			M10 × 1.5 mm	100	0.5"	Not Rated	Not Rated	2.5"	2.89"	1.94"	3"	3"	-20 to 180	No	4	0.3"	2.38"	85	0.305"-32	Schrader	Aluminum	00000000	00000
			M12 × 1.75 mm	300	0.5"	Not Rated	Not Rated	2.5"	4.14"	1.94"	4.19"	4.19"	-20 to 180	No	4	0.3"	3.5"	85	0.305"-32	Schrader	Aluminum	00000000	000000
			M12 × 1.75 mm	550	0.5"	Not Rated	Not Rated	3.5"	5"	2.94"	5.13"	5.13"	-20 to 180	No	4	0.3"	4.25"	85	0.305"-32	Schrader	Aluminum	00000000	000000
			M12 × 1.75 mm	1,200	0.5"	Not Rated	Not Rated	3.5"	6.74"	2.94"	6.88"	6.88"	-20 to 180	No	4	0.3"	6"	85	0.305"-32	Schrader	Aluminum	00000000	000000
			M16 × 2 mm	2,400	0.5"	Not Rated	Not Rated	3.5"	9.66"	2.94"	10"	10"	-20 to 180	No	4	0.56"	8.5"	85	0.305"-32	Schrader	Aluminum	00000000	000000

Light Duty Adjustable Shock Absorbers

Also known as snubbers, use these shock absorbers in low-load, high-cycle applications. They counteract the energy of moving objects to prevent damage to equipment and material. Turn the knob to change deceleration to suit varying loads and speeds.

Through-Wall Mount

Through-wall shock absorbers have a stud and nut under the removable knob for mounting through a panel or bracket.

						Body		Rod		Mounting Stud
	Energy Cap., in·lbf	Max. Cycles per min., cpm	Stroke Lg.	Extended Lg.	Compressed Lg.	Dia.	Material	Dia.	Material	Thread Size	Lg.	Temp. Range, ° F		Each
Variable Adjustment



		4	600	1.1"	4.32"	2.99"	1.01"	Rubber-Coated Borosilicate Glass	0.375"	Urethane Rubber	3/8"-32	1/8"	-67 to 158	0000000	000000


		9	330	1.3"	4.15"	2.62"	1.35"	Rubber-Coated Borosilicate Glass	0.375"	Urethane Rubber	3/8"-32	1/8"	-67 to 158	0000000	00000

Flange Mount

						Body		Rod			Flange
	Energy Cap., in·lbf	Max. Cycles per min., cpm	Stroke Lg.	Extended Lg.	Compressed Lg.	Dia.	Material	Dia.	Material	Tip Material	Location	Wd.	Ht.	Mounting Hole Ctr.-to-Ctr.	Mounting Hole Dia.	Thk.	Temp. Range, ° F		Each
Variable Adjustment



		36	200	2.3"	6.7"	3.9"	1.74"	Rubber-Coated Borosilicate Glass	0.312"	Acetal	Urethane Rubber	Back	1 3/4"	1 3/4"	1.38"	0.171"	1/8"	-67 to 158	0000000	0000000


		84	70	2.3"	6.7"	3.9"	2.21"	Rubber-Coated Borosilicate Glass	0.312"	Acetal	Urethane Rubber	Back	2 1/8"	2 1/8"	1 3/4"	0.171"	1/8"	-67 to 158	0000000	000000