When you're choosing between a cylinder stroke reducer and a complete air cylinder, the real question is about project scope. Are you upgrading or repairing a cylinder you already have, or do you need a full cylinder to put into a pneumatic system? In hydraulics and pneumatics, these are two different jobs with two different parts.
Quick verdict
Choose the Hydraulic & Pneumatic Cylinder Stroke Reducer Set if your focus is stroke control on an existing hydraulic or pneumatic cylinder. Choose the TECHTONGDA SC 100 x 450 Air Cylinder if you need a complete pneumatic cylinder for assembly or replacement.
Comparison
| Product | Listed price | Price bar | Key specs | Best for |
|---|---|---|---|---|
| Hydraulic & Pneumatic Cylinder Stroke Reducer Set | USD 39.95 | Fits 1.125-1.5" diameter cylinders; fits Speeco-compatible equipment | Controlling stroke on an existing cylinder within that diameter range | |
| TECHTONGDA SC 100 x 450 Air Cylinder | USD 64.17 | Double-acting pneumatic standard cylinder; 4" bore; 18" stroke; piston port M20X1 | Replacing or adding a complete air cylinder with a long stroke |
Where each product wins
- Hydraulic & Pneumatic Cylinder Stroke Reducer Set wins when the plan is to keep an existing cylinder and control its stroke. It's a control set rather than a replacement cylinder, so it suits a repair or adjustment job.
- TECHTONGDA SC 100 x 450 Air Cylinder wins when you need the cylinder itself. It's a new pneumatic standard cylinder and a full component for assembly or replacement.
Product notes
Hydraulic & Pneumatic Cylinder Stroke Reducer Set

This set is aimed at maintenance work. It's designed to control the stroke of hydraulic and pneumatic cylinders with a diameter from 1.125 to 1.5 inches, and it's priced at USD 39.95. If your existing cylinder fits that range and your project is about adjusting stroke length rather than replacing the whole unit, this gives you a direct path. The limitation is that it's not a complete cylinder: it's a control set for a cylinder you already have. The fit is also specific to that diameter range and to Speeco-compatible equipment, so it won't apply to cylinders outside that scope. If your setup is outside that range or you need a new cylinder body, this set won't fill that role.
Air Cylinder Pneumatic Standard Cylinder SC 100 x 450

The TECHTONGDA SC 100 x 450 is a full air cylinder rather than an add-on control. It's a new double-acting pneumatic standard cylinder with a 4-inch bore and an 18-inch stroke, priced at USD 64.17. That price covers the complete cylinder body, with a piston port size of M20X1 and a piston speed range of 50-800mm/s. If you're replacing a cylinder or building a new pneumatic setup and need that bore and stroke combination, this is the unit to start with. Its limitation is scope: it's a pneumatic cylinder, so it won't help you alter the stroke of an existing hydraulic cylinder the way the reducer set will. Your system's layout will also need to accommodate the M20X1 port and the 18-inch stroke.
Final choice by use case
- Pick the Stroke Reducer Set when you're working with an existing hydraulic or pneumatic cylinder and you want stroke control at the lower priced option.
- Pick the TECHTONGDA SC 100 x 450 when you need a complete pneumatic cylinder and you're comfortable with the higher priced option.