Quick Take
Choosing an air cylinder comes down to bore, stroke, and action. In this set of four options, the listed prices run from $19.37 to $193.99. Three cylinders are double-acting, and one is a single-acting aluminum VELVAC. The included connectors and fittings also differ, so the right pick is the one that matches your mechanism and air-line connections.
Listed-Price Comparison
| Product | Listed Price | Price Bar | What Matters |
|---|---|---|---|
| Velvac 100126 Air Cylinder, 2 1/2 In Bore, 6 In Stroke, Single Acting, Aluminum | USD 193.99 | 2-1/2-inch bore, 6-inch stroke, single-acting aluminum construction | |
| Air Cylinder 16mm Bore 50mm Stroke, Mini Air Pneumatic Cylinder Double Action Si | USD 24.37 | 16mm bore, 50mm stroke, double action, includes Y connector and 4 quick fittings | |
| 25mm Bore 150mm Stroke Double Acting Air Cylinder with Y Connector & 2 Fittings | USD 38.99 | 25mm bore, 150mm stroke, double acting, adjustable buffer, PT1/8 port | |
| 16mm Bore 75mm Stroke Pneumatic Air Cylinder Y Connector and Fitting | USD 19.37 | 16mm bore, 75mm stroke, double acting, aluminum alloy, M5 port |
Decision Matrix
| If you need... | Look at... |
|---|---|
| Compact double-acting motion with a 50mm stroke and several quick fittings | The 16mm Bore 50mm Stroke Mini Air Pneumatic Cylinder |
| A low-priced alternative to that compact double-acting option, with a little more travel | The 16mm Bore 75mm Stroke Pneumatic Air Cylinder |
| Long 150mm travel plus adjustable buffer and a PT1/8 port | The 25mm Bore 150mm Stroke Double Acting Air Cylinder |
| A 2-1/2-inch bore, 6-inch stroke single-acting aluminum unit | The Velvac 100126 Air Cylinder |
Product Notes
Velvac 100126 Air Cylinder, 2 1/2 In Bore, 6 In Stroke
The VELVAC 100126 stands out from the three double-acting models because it is single-acting. With a 2-1/2-inch bore and 6-inch stroke, it is the largest bore and the longest stroke listed here, and the title also notes aluminum construction. At USD 193.99, it is the highest listed price in this group, so it makes sense when the application specifically calls for a single-acting cylinder with those dimensions. It is the only single-acting option here, which is either exactly what you need or a dealbreaker if you want double-acting control.
Air Cylinder 16mm Bore 50mm Stroke Mini Double Action
This compact SWZHAI cylinder lists for USD 24.37 and has a bidirectional sealing design for reduced air leakage. It is double-acting with a 16mm bore and 50mm stroke, and the package includes one cylinder, one Y connector, and four pneumatic quick fittings. That makes it the most fitting-rich option of the four. The limitation is travel: at 50mm, the stroke is the shortest in this group, so it is suited to smaller mechanisms rather than longer reach. The listed color is red.
25mm Bore 150mm Stroke Double Acting Air Cylinder with Y Connector & 2 Fittings
The 25mm Bore 150mm Stroke Double Acting Air Cylinder lists for USD 38.99 and brings a longer working range than the 16mm options. Specifications include a PT1/8 port, an adjustable buffer, a maximum pressure rating of 1.0 MPa (145 psi), and an aluminum body, so it suits applications that need both travel and a tunable cushion. The package includes a Y connector and two fittings. Its limitation is price: at USD 38.99 it sits above the two 16mm models, and the port is PT1/8 rather than M5.
16mm Bore 75mm Stroke Pneumatic Air Cylinder Y Connector and Fitting
The 16mm Bore 75mm Stroke Pneumatic Air Cylinder is the lowest-priced option at USD 19.37. Its bore matches the 16mm mini, but its stroke is 75mm rather than 50mm. Specifications include an aluminum alloy body, M5 port, M6 piston rod thread, and a working pressure range of 0.15 to 1.0 MPa (14 to 145 psi). It comes with one Y connector and two M5-to-6mm quick fittings. The main trade-off is that this is not the long-stroke choice; if you need 150mm of travel, the 25mm model is the one to consider.
Final Recommendation
If you need a compact double-acting cylinder with a 50mm stroke and the most included fittings, the 16mm Bore 50mm Stroke Mini Air Pneumatic Cylinder is the clear fit. If you want the same 16mm bore but a 75mm stroke, the 16mm Bore 75mm Stroke Pneumatic Air Cylinder gives you more travel at a lower listed price. For longer 150mm strokes and an adjustable buffer, the 25mm Bore 150mm Stroke Double Acting Air Cylinder is the option with that buffer. And if your application needs a single-acting aluminum cylinder, the VELVAC 100126 is the model to choose.
