The AirTAC Airtac SCD Standard Cylinder SCD50X25S is a genuine double-acting DOUBLE-ROD air cylinder: the Ø20mm piston rod extends from BOTH end caps, giving equal effective area — and therefore equal force — in push and pull. Ø50mm bore, 25mm stroke, PT1/4 ports and adjustable end cushioning.
The SCD50X25S is a double-acting, double-rod pneumatic cylinder delivering identical force in both directions—825 N at 0.5 MPa—because the 20 mm rod passes through both end caps. Its short 25 mm stroke and 207 mm body length suit compact two-sided tooling where space is tight.
This model includes a built-in magnet (-S suffix), allowing CMSG, DMSG, or EMSG sensors to clamp directly onto the tie-rod barrel for non-contact end-of-stroke sensing. The adjustable air cushion at each end decelerates the piston smoothly, and the PT1/4 ports keep plumbing simple.
| Model | Airtac SCD Standard Cylinder SCD50X25S |
|---|---|
| Series | SCD double-rod tie-rod cylinder |
| Bore size | Ø50 mm |
| Rod diameter | Ø20 mm (both ends) |
| Stroke | 25 mm |
| Rod configuration | Double rod — rod through both caps |
| Acting type | Double acting |
| Port size | PT1/4 |
| Rod thread | M16×1.5 |
| Fluid | Air (filtered by 40µm element) |
|---|---|
| Operating pressure | 0.15 – 1.0 MPa |
| Proof pressure | 1.5 MPa |
| Temperature | -20 to +70 °C |
| Speed range | 30 – 800 mm/s |
| Cushion | Adjustable, 21 mm |
| Max stroke | Up to 1200 mm |
Specifications follow the official AirTAC SCD (double-rod) datasheet. Because the rod runs through both caps, the effective area is (bore² − rod²) in both directions. Confirm against the product label before installation. Thread options: PT (standard) / G.
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 825 N | 825 N |
| 0.7 MPa | 1155 N | 1155 N |
| Max (@1.0 MPa) | 168 kgf | |
Push and pull are EQUAL on a double-rod cylinder — both chambers lose the rod area, so effective area = (bore² − rod²) each way. Actual usable force is lower than theoretical due to friction and back-pressure; size with a safety margin.
| SCD | Double-rod tie-rod cylinder series (rod out both ends). |
|---|---|
| 50 | Bore size in mm. |
| ×25 | Stroke length in mm. |
| -S | Optional built-in magnet for sensor position sensing. |
Related types: SC (single rod), SCJ (adjustable stroke), SCT (multi-position). SCD mounting: Basic, FA, LB, TC, TCM1. Seals: TPU standard / H = Viton / N = NBR. Thread: blank = PT, G = G thread.
The double rod pushes a shuttle table in both directions with equal force, and the rear rod can carry a counterbalance or second tool.
The built-in magnet lets CMSG/DMSG sensors detect piston position on this compact 25 mm stroke, ideal for tight pick-and-place nests.
Dual rod support resists rotation, making the SCD50X25S a stable linear pusher for light pressing or alignment stations without a separate guide.
Choose the SCD50 when you need equal push-pull force in a mid-range bore. If 825 N at 0.5 MPa is too light, step up to the SCD63 (1402 N at 0.5 MPa); if it exceeds your need, the SCD40 provides 528 N. For applications where only one rod end is needed, a standard SC single-rod cylinder reduces cost and overall length.
To replace an existing SCD50X25S, match bore (50), stroke (25), PT port thread, basic mounting, and the -S magnet option. The through-rod design offers better guidance than a single-rod cylinder, but sustained side loads still call for an external guide or a dedicated guided cylinder.
Double-rod checklist
Because the 20 mm rod occupies area on both sides of the piston, push and pull force are identical: 825 N at 0.5 MPa, 1154 N at 0.7 MPa, and 1484 N at the maximum operating pressure of 0.9 MPa.
An SCD double-rod cylinder gives equal force and speed in both directions and provides a rear rod extension for mounting sensors, stoppers, or secondary tooling. The through-rod also improves bearing support and resists piston rotation better than a single-rod SC, though it does not replace a fully guided cylinder for heavy side loads.
Genuine AirTAC parts produced by AirTAC factory.
Covers non-human-caused product damage.
Standard models usually ship in 3-4 days.
Most inquiries answered within 7-8 hours.
Send us the quantity and destination. We confirm price, stock and lead time — usually within 7-8 hours.