Made To Outperform
The Illinois Pneumatics' Diaphragm Air Cylinder combines the field proven rolling diaphragm design with today's higher strength, lighter weight materials to provide a cylinder that lasts longer, yet weighs less than conventional diaphragm air cylinders. Illinois Pneumatics prides itself in modifying standard cylinders for special use.

Flexible Design
Our 3-Piece design allows for more flexibility compared to other cylinders on the market.
Making it the ideal choice for custom/ application-specific requirements. Click on the dots or learn more below.

Fasteners
Manufactured from heat treated, high carbon alloys for strength and resistance to corrosion. Stainless steel also available.
Cylinder Tube
Manufactured from 6063-T6 aluminum, which is fully anodized for maximum corrosion protection. Custom anodizing colors and finishes are available.
End Caps
Made from high grade aluminum alloy offering standard mounting hole configurations or custom patterns.
Piston Rods
Made of hard chrome plated ground and polished steel with a minimum yield of 100,000 psi. Ground and chrome plated stainless steel rods are also available.
Pistons
Pistons are aluminum which allow for light weight and low inertia.
Diaphragms
Made from neoprene rubber with a woven polyester fabric. Rated to operate from -25 degrees to 250 degrees F. Optional viton or silicone material available for more extreme temperatures.
Rod Bearings
Can be customized to fit your application requirements and tolerances. See below for more details.
Cylinder Tube
Manufactured from 6063-T6 aluminum, which is completely anodized to assure maximum corrosion protection. Custom anodizing colors are available as well as other exterior finishes.
*Size 36 cylinders use chrome plated and ground steel tubes.
End Caps
High grade aluminum alloy end caps offer standard mounting hole configurations or custom patterns.
Piston Rods
Piston rods are made of hard chrome plated ground and polished steel with a minimum yield of 100,000 psi. Ground and chrome plated stainless steel piston rods are also available.
Pistons
Pistons are aluminum alloy for light weight and low inertia.
Fasteners
Manufactured from heat treated, high carbon alloys for strength and resistance to corrosion. Other materials such as stainless steel are also available.
Diaphragms
Illinois Pneumatics' fabric reinforced diaphragms are manufactured from neoprene rubber with a woven polyester fabric. Rated to operate from -25 degrees to 250 degrees F. Optional diaphragm materials such as viton or silicone can be selected to operate from -75 degrees to 400 degrees F. Consult factory for application requirements.

Rod Bearings
SA & DA Series
Standard single (SA series) and double acting (DA series) cylinders utilize impregnated sintered bronze bearings with a urethane rod wiper for smooth operation and long life.

Rod Bearings
LB Series
LB series cylinders utilize linear bearings for applications requiring minimum friction and maximum sensitivity. These cylinders combine the advantages of the rolling diaphragm seal with the extremely low friction linear bearing and a case hardened steel piston rod. Linear bearing cylinders are available in long stroke only.

Rod Bearings
CB Series
CB series cylinders utilize composite bearings and case hardened steel rods for applications requiring the highest load capacity. With load capacities ten to twenty times greater than other bearings and a co-efficient of friction as low as .125 average, composite bearings are the ultimate in performance. Unlike other bearing designs, composite bearings will not fail catastrophically.
Operating Information
ILLINOIS PNEUMATICS DIAPHRAGM AIR CYLINDERS ARE RATED TO OPERATE ON COMPRESSED AIR UP TO 145 PSI WITH TEMPERATURES FROM -25 TO 250 DEGREES F.
THE ILLINOIS PNEUMATICS DIAPHRAGM AIR CYLINDER DESIGN ALLOWS FLEXIBILITY TO CUSTOM MODIFY CYLINDERS TO SPECIFIC CUSTOMER REQUIREMENTS.