Pneumatic Cylinder Shopping: Mini to 4-Inch Bore Options from $19.37

When you're picking a pneumatic air cylinder, the first question is usually about size: what bore and stroke fit the space, and what port size connects to your air line. The second is about budget. The four cylinders here range from a compact mini to a large SC 100, with listed prices from $19.37 to $64.17, so the decision hinges on how much force and travel you need.

Quick take

In this lineup, the SC 100 x 450 is the largest option, the SC 63 x 200 falls between that and the mini cylinders in both price and bore size, and the other two are smaller cylinders. Those two smaller cylinders differ mainly in stroke length and how many quick fittings are included.

Listed price comparison

Decision matrix

Product notes

Air Cylinder Pneumatic Standard Cylinder SC 100 x 450, Bore 4" Stroke 18

This is the large-format option in the group, with a 4-inch bore and an 18-inch stroke. The double-acting design moves the rod in both directions, and its port thread is M20X1. The description highlights an aluminum alloy body that is anticorrosive and built for long service. Choose this if your application needs a wide bore to generate more force and a long stroke to cover significant travel. It carries the highest listed price in this set at USD 64.17, and the metric port thread is a detail to confirm against your existing fittings. It is listed as new, with a Country of Origin of China.

Pneumatic Air Cylinder SC 63 x 200, PT 3/8 Port, 2-1/2" Bore, 7.87" Stroke

This mid-size cylinder offers a 2-1/2-inch bore and a 7.87-inch stroke, and uses a PT 3/8 port. It is double-acting with a single rod, and the piston rod has an M16x1.5 thread. The listing is new, made in the United States, and colored silver. At USD 53.89, it sits below the 4-inch SC 100 but above the mini cylinders, giving you a balance of force and travel for medium-duty automation. The main trade-off is that its stroke is shorter than the SC 100's 18 inches, so if you need long linear travel, this will cap you at just under eight inches.

Air Cylinder 16mm Bore 50mm Stroke, Mini Air Pneumatic Cylinder Double Action

This mini cylinder from SWZHAI has a 16mm bore and a 50mm stroke, making it the shortest-travel option in the lineup. The package includes one cylinder, one Y connector, and four pneumatic quick fittings, so you get the connection pieces in the box. The description mentions a bidirectional sealing structure that helps reduce air leakage. At USD 24.37, it's priced between the two 16mm choices, and you're paying a little more than the Zaplyte for an extra pair of quick fittings and a shorter stroke. If you need a compact cylinder for small automation or a fixture, this fits that role, but the 50mm stroke may be limiting if you need more travel.

16mm Bore 75mm Stroke Pneumatic Air Cylinder Y Connector and Fitting

At USD 19.37, this is the lowest listed price in the set. It uses the same 16mm bore as the SWZHAI but extends the stroke to 75mm, and it comes with a Y connector and two M5-to-6mm quick fittings. The aluminum alloy construction is described as corrosion-resistant and able to handle working pressure from 0.15 to 1.0 MPa. This makes it a reasonable pick for a compact cylinder with a bit more travel than the 50mm mini. One thing to note is the California Prop 65 warning on the listing, which may matter to you depending on your workplace requirements. Also, the included fitting count is fewer than the SWZHAI package.

Final recommendation by use case

• If you need the widest bore and longest stroke for heavy pushing, go with the SC 100 x 450.
• For a mid-size cylinder with a PT 3/8 port and US origin, the SC 63 x 200 is the pick.
• If you want a compact cylinder with extra fittings in the box, the SWZHAI mini works well.
• If you want the lowest listed price and don't need as many fittings, the Zaplyte mini is a solid option.