Need to pick between a compact cylinder and a large-bore standard cylinder? The real question is how much force and travel your pneumatic circuit needs. These two pneumatic cylinders sit at opposite ends of the spectrum: the PARKER 1" Bore X 2" Stroke Pneumatic Cylinder Series 2A 250 PSI is a small steel unit, while the Air Cylinder Pneumatic Standard Cylinder SC 100 x 450 is a big-bore aluminum cylinder with an 18-inch stroke.
Quick verdict
If you need a compact, lower-priced cylinder for a small fixture or light pushing job, the Parker Series 2A is the sensible choice at $29.95. If you need a much larger cylinder with long travel and standard cylinder format, the TECHTONGDA SC 100 x 450 is worth the $64.17 price. That's a $34.22 spread between the two, and the extra money goes directly into a larger bore and stroke.
Comparison
| Aspect | Parker Series 2A | TECHTONGDA SC 100 x 450 |
|---|---|---|
| Listed price | USD 29.95 | USD 64.17 |
| Bore | 1" | 4" |
| Cylinder action | Double-acting | Double-acting |
| Cylinder type | Tie-rod cylinder | Standard air cylinder |
| Construction | Steel | High-precision aluminum alloy |
| Country of origin | United States | China |
| Condition | New - Open box | New |
Where each product wins
The Parker wins on price and compactness. It also carries a 250 PSI maximum pressure rating, which makes it a credible choice for smaller industrial circuits. The TECHTONGDA wins on displacement: the larger bore and longer stroke put it in a different class for moving larger loads over longer travel. The double-acting design is shared by both, so that's not a differentiator.
Product notes
PARKER 1" Bore X 2" Stroke Pneumatic Cylinder Series 2A 250 PSI
This Parker Series 2A is a double-acting cylinder rated to 250 PSI. The steel construction gives it a conventional industrial feel, and its price makes it an easy entry point. It's also made in the United States, and it's being sold as new old stock in open-box condition. The main limitation is the small bore: if your application needs real pushing force or a long stroke, this cylinder is physically in a different league than the TECHTONGDA. The open-box condition also means you should expect a working shop cylinder rather than a sealed retail presentation.
Air Cylinder Pneumatic Standard Cylinder SC 100 x 450, Bore 4" Stroke 18
The TECHTONGDA SC 100 x 450 is the big-bore option here, with a 4-inch bore and an 18-inch stroke in a standard cylinder format. The high-precision aluminum alloy body is specified as corrosion-resistant, and the specified operating temperature range of -20 to 80°C gives you a sense of the environments it can handle. The trade-off is the higher price and the standard cylinder design: you get aluminum construction instead of a tie-rod design. The larger size and stroke are the clear reasons to choose it if you're moving heavier loads or need more travel. The main limitation is that it's a bigger commitment in both price and physical space, so it's overkill for small fixture work.
Final choice by use case
Choose the Parker Series 2A if you want a compact, lower-priced cylinder for small fixture tasks. Choose the TECHTONGDA SC 100 x 450 if you need a much bigger cylinder with long travel and want corrosion-resistant construction.
